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add pre-pre-alpha RGB_LED_Screen

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This commit is contained in:
Edward Emelianov 2021-04-18 21:15:12 +03:00
parent 8b4b811b94
commit a438f0515f
22 changed files with 11256 additions and 0 deletions
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139
F1-nolib/RGB_LED_Screen/Makefile Normal file
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BINARY = RGBLEDscreen
BOOTPORT ?= /dev/ttyUSB0
BOOTSPEED ?= 115200
# MCU FAMILY
FAMILY ?= F1
# MCU code
MCU ?= F103x8
# density (stm32f10x.h, lines 70-84)
DENSITY ?= MD
# change this linking script depending on particular MCU model,
LDSCRIPT ?= stm32f103x8.ld
# debug
DEFS = -DEBUG
INDEPENDENT_HEADERS=
FP_FLAGS ?= -msoft-float -mfloat-abi=soft
ASM_FLAGS ?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
ARCH_FLAGS = $(ASM_FLAGS) $(FP_FLAGS)
###############################################################################
# Executables
#PREFIX ?= arm-none-eabi
# gcc from arm web site
PREFIX ?= /opt/bin/arm-none-eabi
TOOLCHLIB ?= /opt/arm-none-eabi/lib
RM := rm -f
RMDIR := rmdir
CC := $(PREFIX)-gcc
# don't replace ld with gcc: the binary size would be much greater!!
LD := $(PREFIX)-ld
AR := $(PREFIX)-ar
AS := $(PREFIX)-as
SIZE := $(PREFIX)-size
OBJCOPY := $(PREFIX)-objcopy
OBJDUMP := $(PREFIX)-objdump
GDB := $(PREFIX)-gdb
STFLASH := $(shell which st-flash)
STBOOT := $(shell which stm32flash)
DFUUTIL := $(shell which dfu-util)
###############################################################################
# Source files
OBJDIR = mk
SRC := $(wildcard *.c)
OBJS := $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
STARTUP = $(OBJDIR)/startup.o
OBJS += $(STARTUP)
# dependencies: we need them to recompile files if their headers-dependencies changed
DEPS := $(OBJS:.o=.d)
INC_DIR ?= ../inc
INCLUDE := -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
LIB_DIR := $(INC_DIR)/ld
###############################################################################
# C flags
CFLAGS += -O2 -g -D__thumb2__=1 -MD -Wl,--gc-sections
CFLAGS += -Wall -Werror -Wextra -Wshadow
CFLAGS += -fno-common -ffunction-sections -fdata-sections -fno-stack-protector
CFLAGS += $(ARCH_FLAGS)
###############################################################################
# Linker flags
LDFLAGS += -nostartfiles --static -nostdlibs --gc-sections
LDFLAGS += -L$(LIB_DIR) -L$(TOOLCHLIB)
LDFLAGS += -T$(LDSCRIPT)
###############################################################################
# Used libraries
LDLIBS += -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
DEFS += -DSTM32$(FAMILY) -DSTM32$(MCU) -DSTM32F10X_$(DENSITY)
ELF := $(OBJDIR)/$(BINARY).elf
LIST := $(OBJDIR)/$(BINARY).list
BIN := $(BINARY).bin
HEX := $(BINARY).hex
all: bin list size
elf: $(ELF)
bin: $(BIN)
hex: $(HEX)
list: $(LIST)
ifneq ($(MAKECMDGOALS),clean)
-include $(DEPS)
endif
$(OBJDIR):
mkdir $(OBJDIR)
$(STARTUP): $(INC_DIR)/startup/vector.c
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
$(OBJDIR)/%.o: %.c
@echo " CC $<"
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
$(BIN): $(ELF)
@echo " OBJCOPY $(BIN)"
$(OBJCOPY) -Obinary $(ELF) $(BIN)
$(HEX): $(ELF)
@echo " OBJCOPY $(HEX)"
$(OBJCOPY) -Oihex $(ELF) $(HEX)
$(LIST): $(ELF)
@echo " OBJDUMP $(LIST)"
$(OBJDUMP) -S $(ELF) > $(LIST)
$(ELF): $(OBJDIR) $(OBJS)
@echo " LD $(ELF)"
$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
size: $(ELF)
$(SIZE) $(ELF)
clean:
@echo " CLEAN"
$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST)
@rmdir $(OBJDIR) 2>/dev/null || true
flash: $(BIN)
@echo " FLASH $(BIN)"
$(STFLASH) write $(BIN) 0x8000000
boot: $(BIN)
@echo " LOAD $(BIN) through bootloader"
$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
dfuboot: $(BIN)
@echo " LOAD $(BIN) THROUGH DFU"
$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
.PHONY: clean flash boot

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F1-nolib/RGB_LED_Screen/RGBLEDscreen.bin Executable file
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6
F1-nolib/RGB_LED_Screen/Readme Normal file
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HUB75E-based RGB LED panel management
886 color (RRRGGGBB)
// the better fonts management is in Chronometer-v3

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F1-nolib/RGB_LED_Screen/font14.h Normal file
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F1-nolib/RGB_LED_Screen/font16.h Normal file
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F1-nolib/RGB_LED_Screen/fonts.c Normal file
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/*
* This file is part of the LED_screen project.
* Copyright 2019 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stddef.h>
#include "fonts.h"
/* Bash-script to generate the symbols
#!/bin/bash
function bits(){
Ans=""
for x in $(seq 7 -1 0); do
B=$((1<<$x))
if [ $(($1&$B)) -ne 0 ]; then Ans="${Ans}X"
else Ans="${Ans}_"
fi
done
echo $Ans
}
for x in $(seq 0 255); do
printf "#define $(bits $x)\t0x%02x\n" $x
done
*/
#define ________ 0x00
#define _______X 0x01
#define ______X_ 0x02
#define ______XX 0x03
#define _____X__ 0x04
#define _____X_X 0x05
#define _____XX_ 0x06
#define _____XXX 0x07
#define ____X___ 0x08
#define ____X__X 0x09
#define ____X_X_ 0x0a
#define ____X_XX 0x0b
#define ____XX__ 0x0c
#define ____XX_X 0x0d
#define ____XXX_ 0x0e
#define ____XXXX 0x0f
#define ___X____ 0x10
#define ___X___X 0x11
#define ___X__X_ 0x12
#define ___X__XX 0x13
#define ___X_X__ 0x14
#define ___X_X_X 0x15
#define ___X_XX_ 0x16
#define ___X_XXX 0x17
#define ___XX___ 0x18
#define ___XX__X 0x19
#define ___XX_X_ 0x1a
#define ___XX_XX 0x1b
#define ___XXX__ 0x1c
#define ___XXX_X 0x1d
#define ___XXXX_ 0x1e
#define ___XXXXX 0x1f
#define __X_____ 0x20
#define __X____X 0x21
#define __X___X_ 0x22
#define __X___XX 0x23
#define __X__X__ 0x24
#define __X__X_X 0x25
#define __X__XX_ 0x26
#define __X__XXX 0x27
#define __X_X___ 0x28
#define __X_X__X 0x29
#define __X_X_X_ 0x2a
#define __X_X_XX 0x2b
#define __X_XX__ 0x2c
#define __X_XX_X 0x2d
#define __X_XXX_ 0x2e
#define __X_XXXX 0x2f
#define __XX____ 0x30
#define __XX___X 0x31
#define __XX__X_ 0x32
#define __XX__XX 0x33
#define __XX_X__ 0x34
#define __XX_X_X 0x35
#define __XX_XX_ 0x36
#define __XX_XXX 0x37
#define __XXX___ 0x38
#define __XXX__X 0x39
#define __XXX_X_ 0x3a
#define __XXX_XX 0x3b
#define __XXXX__ 0x3c
#define __XXXX_X 0x3d
#define __XXXXX_ 0x3e
#define __XXXXXX 0x3f
#define _X______ 0x40
#define _X_____X 0x41
#define _X____X_ 0x42
#define _X____XX 0x43
#define _X___X__ 0x44
#define _X___X_X 0x45
#define _X___XX_ 0x46
#define _X___XXX 0x47
#define _X__X___ 0x48
#define _X__X__X 0x49
#define _X__X_X_ 0x4a
#define _X__X_XX 0x4b
#define _X__XX__ 0x4c
#define _X__XX_X 0x4d
#define _X__XXX_ 0x4e
#define _X__XXXX 0x4f
#define _X_X____ 0x50
#define _X_X___X 0x51
#define _X_X__X_ 0x52
#define _X_X__XX 0x53
#define _X_X_X__ 0x54
#define _X_X_X_X 0x55
#define _X_X_XX_ 0x56
#define _X_X_XXX 0x57
#define _X_XX___ 0x58
#define _X_XX__X 0x59
#define _X_XX_X_ 0x5a
#define _X_XX_XX 0x5b
#define _X_XXX__ 0x5c
#define _X_XXX_X 0x5d
#define _X_XXXX_ 0x5e
#define _X_XXXXX 0x5f
#define _XX_____ 0x60
#define _XX____X 0x61
#define _XX___X_ 0x62
#define _XX___XX 0x63
#define _XX__X__ 0x64
#define _XX__X_X 0x65
#define _XX__XX_ 0x66
#define _XX__XXX 0x67
#define _XX_X___ 0x68
#define _XX_X__X 0x69
#define _XX_X_X_ 0x6a
#define _XX_X_XX 0x6b
#define _XX_XX__ 0x6c
#define _XX_XX_X 0x6d
#define _XX_XXX_ 0x6e
#define _XX_XXXX 0x6f
#define _XXX____ 0x70
#define _XXX___X 0x71
#define _XXX__X_ 0x72
#define _XXX__XX 0x73
#define _XXX_X__ 0x74
#define _XXX_X_X 0x75
#define _XXX_XX_ 0x76
#define _XXX_XXX 0x77
#define _XXXX___ 0x78
#define _XXXX__X 0x79
#define _XXXX_X_ 0x7a
#define _XXXX_XX 0x7b
#define _XXXXX__ 0x7c
#define _XXXXX_X 0x7d
#define _XXXXXX_ 0x7e
#define _XXXXXXX 0x7f
#define X_______ 0x80
#define X______X 0x81
#define X_____X_ 0x82
#define X_____XX 0x83
#define X____X__ 0x84
#define X____X_X 0x85
#define X____XX_ 0x86
#define X____XXX 0x87
#define X___X___ 0x88
#define X___X__X 0x89
#define X___X_X_ 0x8a
#define X___X_XX 0x8b
#define X___XX__ 0x8c
#define X___XX_X 0x8d
#define X___XXX_ 0x8e
#define X___XXXX 0x8f
#define X__X____ 0x90
#define X__X___X 0x91
#define X__X__X_ 0x92
#define X__X__XX 0x93
#define X__X_X__ 0x94
#define X__X_X_X 0x95
#define X__X_XX_ 0x96
#define X__X_XXX 0x97
#define X__XX___ 0x98
#define X__XX__X 0x99
#define X__XX_X_ 0x9a
#define X__XX_XX 0x9b
#define X__XXX__ 0x9c
#define X__XXX_X 0x9d
#define X__XXXX_ 0x9e
#define X__XXXXX 0x9f
#define X_X_____ 0xa0
#define X_X____X 0xa1
#define X_X___X_ 0xa2
#define X_X___XX 0xa3
#define X_X__X__ 0xa4
#define X_X__X_X 0xa5
#define X_X__XX_ 0xa6
#define X_X__XXX 0xa7
#define X_X_X___ 0xa8
#define X_X_X__X 0xa9
#define X_X_X_X_ 0xaa
#define X_X_X_XX 0xab
#define X_X_XX__ 0xac
#define X_X_XX_X 0xad
#define X_X_XXX_ 0xae
#define X_X_XXXX 0xaf
#define X_XX____ 0xb0
#define X_XX___X 0xb1
#define X_XX__X_ 0xb2
#define X_XX__XX 0xb3
#define X_XX_X__ 0xb4
#define X_XX_X_X 0xb5
#define X_XX_XX_ 0xb6
#define X_XX_XXX 0xb7
#define X_XXX___ 0xb8
#define X_XXX__X 0xb9
#define X_XXX_X_ 0xba
#define X_XXX_XX 0xbb
#define X_XXXX__ 0xbc
#define X_XXXX_X 0xbd
#define X_XXXXX_ 0xbe
#define X_XXXXXX 0xbf
#define XX______ 0xc0
#define XX_____X 0xc1
#define XX____X_ 0xc2
#define XX____XX 0xc3
#define XX___X__ 0xc4
#define XX___X_X 0xc5
#define XX___XX_ 0xc6
#define XX___XXX 0xc7
#define XX__X___ 0xc8
#define XX__X__X 0xc9
#define XX__X_X_ 0xca
#define XX__X_XX 0xcb
#define XX__XX__ 0xcc
#define XX__XX_X 0xcd
#define XX__XXX_ 0xce
#define XX__XXXX 0xcf
#define XX_X____ 0xd0
#define XX_X___X 0xd1
#define XX_X__X_ 0xd2
#define XX_X__XX 0xd3
#define XX_X_X__ 0xd4
#define XX_X_X_X 0xd5
#define XX_X_XX_ 0xd6
#define XX_X_XXX 0xd7
#define XX_XX___ 0xd8
#define XX_XX__X 0xd9
#define XX_XX_X_ 0xda
#define XX_XX_XX 0xdb
#define XX_XXX__ 0xdc
#define XX_XXX_X 0xdd
#define XX_XXXX_ 0xde
#define XX_XXXXX 0xdf
#define XXX_____ 0xe0
#define XXX____X 0xe1
#define XXX___X_ 0xe2
#define XXX___XX 0xe3
#define XXX__X__ 0xe4
#define XXX__X_X 0xe5
#define XXX__XX_ 0xe6
#define XXX__XXX 0xe7
#define XXX_X___ 0xe8
#define XXX_X__X 0xe9
#define XXX_X_X_ 0xea
#define XXX_X_XX 0xeb
#define XXX_XX__ 0xec
#define XXX_XX_X 0xed
#define XXX_XXX_ 0xee
#define XXX_XXXX 0xef
#define XXXX____ 0xf0
#define XXXX___X 0xf1
#define XXXX__X_ 0xf2
#define XXXX__XX 0xf3
#define XXXX_X__ 0xf4
#define XXXX_X_X 0xf5
#define XXXX_XX_ 0xf6
#define XXXX_XXX 0xf7
#define XXXXX___ 0xf8
#define XXXXX__X 0xf9
#define XXXXX_X_ 0xfa
#define XXXXX_XX 0xfb
#define XXXXXX__ 0xfc
#define XXXXXX_X 0xfd
#define XXXXXXX_ 0xfe
#define XXXXXXXX 0xff
// here are fonts themself
#include "font14.h"
#include "font16.h"
static const afont FONTS[] = {
[FONT14] = {font14_table, FONT14HEIGHT, FONT14BYTES, FONT14BASELINE},
[FONT16] = {font16_table, FONT16HEIGHT, FONT16BYTES, FONT16BASELINE}
};
const afont *curfont = &FONTS[FONT14];
/**
* @brief choose_font - font selector
* @param newfont - font to choose
* @return 0 if all OK
*/
int choose_font(font_t newfont){
if(newfont >= FONT_T_MAX || newfont <= FONT_T_MIN) return 1;
curfont = &FONTS[newfont];
return 0;
}
/*
// getters for current font values
uint8_t fontheight(){return curfont->height;}
uint8_t fontbaseline(){return curfont->baseline;}
uint8_t fontbytes(){return curfont->bytes;}
*/
const uint8_t *font_char(uint8_t Char){
if(Char < FIRST_SYMBOL_CODE) return NULL;
return &curfont->font[(Char - FIRST_SYMBOL_CODE)*(curfont->bytes+1)];
}

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F1-nolib/RGB_LED_Screen/fonts.h Normal file
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/*
* This file is part of the LED_screen project.
* Copyright 2019 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef FONTS_H__
#define FONTS_H__
#include <stdint.h>
// code number of first symbol in font table
#define FIRST_SYMBOL_CODE 32
// total amount of symbols - all without first 32
#define SYMBOLS_AMOUNT (256-FIRST_SYMBOL_CODE)
// type for font choosing
typedef enum{
FONT_T_MIN = -1, // no fonts <= this
FONT14, // 16x16, font height near 14px
FONT16, // 16x16, font height 16px
FONT_T_MAX // no fonts >= this
} font_t;
int choose_font(font_t newfont);
/* uint8_t fontheight();
uint8_t fontbaseline();
uint8_t fontbytes(); */
const uint8_t *font_char(uint8_t Char);
typedef struct{
const uint8_t *font;// font inself
uint8_t height; // full font matrix height
uint8_t bytes; // amount of bytes in font matrix
uint8_t baseline; // baseline position (coordinate from bottom line)
} afont;
extern const afont *curfont;
char *u2str(uint32_t val);
#endif // FONTS_H__

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F1-nolib/RGB_LED_Screen/hardware.c Normal file
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/*
* geany_encoding=koi8-r
* hardware.c - hardware-dependent macros & functions
*
* Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
#include "hardware.h"
#include "usb.h"
uint8_t transfer_done = 0; // ==1 when DMA transfer ready
// buffer for DMA
static uint32_t dmabuf[SCREEN_WIDTH];
static inline void gpio_setup(){
// Enable clocks to the GPIO subsystems, turn on AFIO clocking to disable SWD/JTAG
RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_AFIOEN;
// turn off JTAG (PB3/4 is in use)
AFIO->MAPR = AFIO_MAPR_SWJ_CFG_JTAGDISABLE;
// turn off USB pullup
USBPU_OFF();
// Set led as opendrain output
GPIOC->CRH = CRH(13, CNF_ODOUTPUT|MODE_SLOW);
// SCREEN color PINs: PA0..PA5
GPIOA->CRL = CRL(0, CNF_PPOUTPUT|MODE_FAST) | CRL(1, CNF_PPOUTPUT|MODE_FAST) | CRL(2, CNF_PPOUTPUT|MODE_FAST) |
CRL(3, CNF_PPOUTPUT|MODE_FAST) | CRL(4, CNF_PPOUTPUT|MODE_FAST) | CRL(5, CNF_PPOUTPUT|MODE_FAST);
// USB pullup - opendrain output
GPIOA->CRH = CRH(15, CNF_PPOUTPUT|MODE_SLOW);
// A..D, LAT, nOE: PB4..PB9
GPIOB->CRL = CRL(4, CNF_PPOUTPUT|MODE_FAST) | CRL(5, CNF_PPOUTPUT|MODE_FAST) | CRL(6, CNF_PPOUTPUT|MODE_FAST) | CRL(7, CNF_PPOUTPUT|MODE_FAST);
GPIOB->CRH = CRH(8, CNF_PPOUTPUT|MODE_FAST) | CRH(9, CNF_PPOUTPUT|MODE_FAST);
}
// setup timer3 for DMA transfers & SCK @ TIM3_CH1 (PA6)
static inline void tim_setup(){
SET(nOE); // turn off output
GPIOA->CRL |= CRL(6, CNF_AFPP|MODE_FAST);
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
// 72MHz & 7ARR = 9MHz
TIM3->PSC = 20000;
TIM3->ARR = 7;
TIM3->CCMR1 = TIM_CCMR1_OC1M; // PWM mode 2 (inactive->active)
TIM3->CCER = TIM_CCER_CC1E; // output 1 enable
TIM3->DIER = TIM_DIER_UDE; // enable DMA requests
RCC->AHBENR |= RCC_AHBENR_DMA1EN;
// memsize 32bit, periphsize 32bit, memincr, mem2periph, full transfer interrupt
DMA1_Channel3->CCR = DMA_CCR_PSIZE_1 | DMA_CCR_MSIZE_1 | DMA_CCR_MINC | DMA_CCR_DIR | DMA_CCR_TCIE;
DMA1_Channel3->CMAR = (uint32_t)dmabuf;
DMA1_Channel3->CPAR = (uint32_t)&GPIOA->BSRR;
NVIC_EnableIRQ(DMA1_Channel3_IRQn);
}
void hw_setup(){
gpio_setup();
tim_setup();
}
void stopTIMDMA(){
DMA1_Channel3->CCR &= ~DMA_CCR_EN; // stop DMA
TIM3->CR1 = 0; // turn off timer
}
/*
static inline uint8_t getcolrvals(uint8_t colr, uint8_t Ntick){
uint8_t *rgb = pack2RGB(colr);
uint8_t result = 0; // bits: 0-R, 1-G, 2-B
for(int i = 0; i < 3; ++i){
#ifdef SCREEN_IS_NEGATIVE
if(rgb[i] < Ntick) result |= 1 << i;
#else
if(rgb[i] >= Ntick) result |= 1 << i;
#endif
}
return result;
}*/
static inline uint8_t getcolrvals(uint8_t colr, uint8_t Ntick){
uint8_t result = 0; // bits: 0-R, 1-G, 2-B
#ifdef SCREEN_IS_NEGATIVE
if(colr >> 5 <= Ntick) result = 1;
colr &= 0x1f;
if(colr >> 2 <= Ntick) result |= 2;
colr &= 3;
if(colr) colr = (colr << 1) + 1;
if(colr <= Ntick) result |= 4;
#else
if(colr >> 5 > Ntick) result = 1;
colr &= 0x1f;
if(colr >> 2 > Ntick) result |= 2;
colr &= 3;
if(colr) colr = (colr << 1) + 1;
if(colr > Ntick) result |= 4;
#endif
return result;
}
/**
* @brief ConvertScreenBuf - convert creen buffer into DMA buffer
* @param sbuf - screen buffer
* @param Nrow - current row number
* @param Ntick - tick number (0..7) for quasi-PWM colors
*/
void ConvertScreenBuf(uint8_t *sbuf, uint8_t Nrow, __attribute__((unused)) uint8_t Ntick){
//USB_send("ConvertScreenBuf\n");
uint8_t *_1st = &sbuf[SCREEN_WIDTH*Nrow], *_2nd = _1st + SCREEN_WIDTH*NBLOCKS; // first and second lines
for(int i = 0; i < SCREEN_WIDTH; ++i){ // ~50us for 64 pixels
uint8_t pinsset = getcolrvals(_1st[i], 0);
pinsset |= getcolrvals(_2nd[i], 0) << 3;
//dmabuf[i] = (i%2) ? ((COLR_pin<<16) | i) : (0b100010);
dmabuf[i] = (COLR_pin << 16) | pinsset; // All BR are 1, BS depending on color
}
}
static uint8_t blknum_curr = 0;
/**
* @brief TIM_DMA_transfer - start DMA transfer
* @param buf - buffer with data for GPIOA->BSRR
* @param blknum - number of active block
*/
void TIM_DMA_transfer(uint8_t blknum){
//USB_send("TIM_DMA_transfer\n");
TIM3->CR1 = 0; // turn off timer
transfer_done = 0;
// set first pixel color
COLR_port->BSRR = dmabuf[0];
DMA1_Channel3->CNDTR = SCREEN_WIDTH;
DMA1_Channel3->CCR |= DMA_CCR_EN; // start DMA
TIM3->CCR1 = 4; // 50% PWM
TIM3->CR1 = TIM_CR1_CEN; // turn on timer
blknum_curr = blknum;
}
// DMA transfer complete - stop transfer
void dma1_channel3_isr(){
TIM3->CR1 |= TIM_CR1_OPM; // set one pulse mode to turn off timer after last CLK pulse
DMA1_Channel3->CCR &= ~DMA_CCR_EN; // stop DMA
while(TIM3->CNT < 7);
SET(nOE); // clear main output
ADDR_port->ODR = (ADDR_port->ODR & ~(ADDR_pin)) | (blknum_curr << ADDR_roll); // set address
SET(LAT); // activate latch
DMA1->IFCR = DMA_IFCR_CGIF3;
transfer_done = 1;
CLEAR(LAT);
CLEAR(nOE); // activate main output
//USB_send("transfer done\n");
}

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/*
* geany_encoding=koi8-r
* hardware.h
*
* Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
#pragma once
#ifndef __HARDWARE_H__
#define __HARDWARE_H__
#include "stm32f1.h"
#include "screen.h"
// define this if screen is negative
// #define SCREEN_IS_NEGATIVE
// LED0 - PC13 (bluepill), blinking each second
#define LED0_port GPIOC
#define LED0_pin (1<<13)
// USB pullup (not present in bluepill) - PA15
#define USBPU_port GPIOA
#define USBPU_pin (1<<15)
#define USBPU_ON() pin_set(USBPU_port, USBPU_pin)
#define USBPU_OFF() pin_clear(USBPU_port, USBPU_pin)
#define LED_blink(x) pin_toggle(x ## _port, x ## _pin)
#define LED_on(x) pin_clear(x ## _port, x ## _pin)
#define LED_off(x) pin_set(x ## _port, x ## _pin)
// SPI DMA channel
#define DMA_SPI_Channel DMA1_Channel3
// SCREEN PINs: A,B,C,D - PB6-PB9; LAT - PB5; nOE - PB4
// CLK - PA6 (TIM3_CH1)
// colors: PA0..PA5
#define COLR_port GPIOA
#define COLR_pin (0x3f)
#define ADDR_port GPIOB
#define ADDR_roll (6)
#define ADDR_pin (0xf<<ADDR_roll)
#define LAT_port GPIOB
#define LAT_pin (1<<5)
#define nOE_port GPIOB
#define nOE_pin (1<<4)
#define SET(x) pin_set(x ## _port, x ## _pin)
#define CLEAR(x) pin_clear(x ## _port, x ## _pin)
#define TOGGLE(x) pin_toggle(x ## _port, x ## _pin)
void hw_setup();
void TIM_DMA_transfer(uint8_t blknum);
void stopTIMDMA();
void ConvertScreenBuf(uint8_t *sbuf, uint8_t Nrow, uint8_t Ntick);
extern uint8_t transfer_done;
#endif // __HARDWARE_H__

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/*
* main.c
*
* Copyright 2017 Edward V. Emelianoff <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "fonts.h"
#include "hardware.h"
#include "proto.h"
#include "screen.h"
#include "usb.h"
#include "usb_lib.h"
volatile uint32_t Tms = 0;
uint8_t countms = 0;
/* Called when systick fires */
void sys_tick_handler(void){
++Tms;
}
void iwdg_setup(){
uint32_t tmout = 16000000;
/* Enable the peripheral clock RTC */
/* (1) Enable the LSI (40kHz) */
/* (2) Wait while it is not ready */
RCC->CSR |= RCC_CSR_LSION; /* (1) */
while((RCC->CSR & RCC_CSR_LSIRDY) != RCC_CSR_LSIRDY){if(--tmout == 0) break;} /* (2) */
/* Configure IWDG */
/* (1) Activate IWDG (not needed if done in option bytes) */
/* (2) Enable write access to IWDG registers */
/* (3) Set prescaler by 64 (1.6ms for each tick) */
/* (4) Set reload value to have a rollover each 2s */
/* (5) Check if flags are reset */
/* (6) Refresh counter */
IWDG->KR = IWDG_START; /* (1) */
IWDG->KR = IWDG_WRITE_ACCESS; /* (2) */
IWDG->PR = IWDG_PR_PR_1; /* (3) */
IWDG->RLR = 1250; /* (4) */
tmout = 16000000;
while(IWDG->SR){if(--tmout == 0) break;} /* (5) */
IWDG->KR = IWDG_REFRESH; /* (6) */
}
#define USBBUFSZ (127)
// usb getline
static char *get_USB(){
static char tmpbuf[USBBUFSZ+1], *curptr = tmpbuf;
static int rest = USBBUFSZ;
int x = USB_receive(curptr);
curptr[x] = 0;
if(!x) return NULL;
if(curptr[x-1] == '\n'){
curptr = tmpbuf;
rest = USBBUFSZ;
return tmpbuf;
}
curptr += x; rest -= x;
if(rest <= 0){ // buffer overflow
curptr = tmpbuf;
rest = USBBUFSZ;
USB_send("USB buffer overflow\n");
}
return NULL;
}
int main(void){
uint32_t lastT = 0, mscnt = 0, Tmscnt = 0;
sysreset();
StartHSE();
SysTick_Config(72000);
RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
hw_setup();
USBPU_OFF();
USB_setup();
PutStringAt(5, SCREEN_HEIGHT-1-curfont->baseline, "Test string");
iwdg_setup();
USBPU_ON();
while(1){
IWDG->KR = IWDG_REFRESH; // refresh watchdog
if(Tms - lastT > 499){
LED_blink(LED0);
lastT = Tms;
}
if(countms){
if(!Tmscnt){
Tmscnt = Tms;
if(!Tmscnt) Tmscnt = 1;
}else{
if(Tms - Tmscnt > 99){
Tmscnt = Tms;
ClearScreen();
PutStringAt(5, SCREEN_HEIGHT-1-curfont->baseline, u2str(++mscnt));
ScreenON();
}
}
}else{
mscnt = 0;
Tmscnt = 0;
}
IWDG->KR = IWDG_REFRESH;
process_screen();
usb_proc();
char *txt; const char *ans;
if((txt = get_USB())){
ans = parse_cmd(txt);
if(ans) USB_send(ans);
}
}
return 0;
}

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "fonts.h"
#include "proto.h"
#include "screen.h"
#include "usb.h"
extern uint8_t countms;
char *omit_spaces(const char *buf){
while(*buf){
if(*buf > ' ') break;
++buf;
}
return (char*)buf;
}
// In case of overflow return `buf` and N==0xffffffff
// read decimal number & return pointer to next non-number symbol
static char *getdec(const char *buf, uint32_t *N){
char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
if(c < '0' || c > '9'){
break;
}
if(num > 429496729 || (num == 429496729 && c > '5')){ // overflow
*N = 0xffffff;
return start;
}
num *= 10;
num += c - '0';
++buf;
}
*N = num;
return (char*)buf;
}
// read hexadecimal number (without 0x prefix!)
static char *gethex(const char *buf, uint32_t *N){
char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
uint8_t M = 0;
if(c >= '0' && c <= '9'){
M = '0';
}else if(c >= 'A' && c <= 'F'){
M = 'A' - 10;
}else if(c >= 'a' && c <= 'f'){
M = 'a' - 10;
}
if(M){
if(num & 0xf0000000){ // overflow
*N = 0xffffff;
return start;
}
num <<= 4;
num += c - M;
}else{
break;
}
++buf;
}
*N = num;
return (char*)buf;
}
// read octal number (without 0 prefix!)
static char *getoct(const char *buf, uint32_t *N){
char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
if(c < '0' || c > '7'){
break;
}
if(num & 0xe0000000){ // overflow
*N = 0xffffff;
return start;
}
num <<= 3;
num += c - '0';
++buf;
}
*N = num;
return (char*)buf;
}
// read binary number (without b prefix!)
static char *getbin(const char *buf, uint32_t *N){
char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
if(c < '0' || c > '1'){
break;
}
if(num & 0x80000000){ // overflow
*N = 0xffffff;
return start;
}
num <<= 1;
if(c == '1') num |= 1;
++buf;
}
*N = num;
return (char*)buf;
}
/**
* @brief getnum - read uint32_t from string (dec, hex or bin: 127, 0x7f, 0b1111111)
* @param buf - buffer with number and so on
* @param N - the number read
* @return pointer to first non-number symbol in buf
* (if it is == buf, there's no number or if *N==0xffffffff there was overflow)
*/
char *getnum(const char *txt, uint32_t *N){
char *nxt = NULL;
char *s = omit_spaces(txt);
if(*s == '0'){ // hex, oct or 0
if(s[1] == 'x' || s[1] == 'X'){ // hex
nxt = gethex(s+2, N);
if(nxt == s+2) nxt = (char*)txt;
}else if(s[1] > '0'-1 && s[1] < '8'){ // oct
nxt = getoct(s+1, N);
if(nxt == s+1) nxt = (char*)txt;
}else{ // 0
nxt = s+1;
*N = 0;
}
}else if(*s == 'b' || *s == 'B'){
nxt = getbin(s+1, N);
if(nxt == s+1) nxt = (char*)txt;
}else{
nxt = getdec(s, N);
if(nxt == s) nxt = (char*)txt;
}
return nxt;
}
const char* helpmsg =
"'0/1' - screen off/on\n"
"'2,3' - select font\n"
"'C' - clear screen with given color\n"
"'F' - set foreground color\n"
"'f' - get FPS\n"
"'R' - software reset\n"
"'W' - test watchdog\n"
"'Zz' -start/stop counting ms\n"
"Any text - put text @ screen\n"
;
const char *parse_cmd(const char *buf){
uint32_t N;
if(buf[1] == '\n'){ // one symbol commands
switch(*buf){
case '0':
ScreenOFF();
return "OFF\n";
break;
case '1':
ScreenON();
return "ON\n";
break;
case '2':
choose_font(FONT14);
return "Font14\n";
break;
case '3':
choose_font(FONT16);
return "Font16\n";
break;
case 'f':
if(SCREEN_RELAX == getScreenState()) return "Screen is inactive\n";
USB_send("FPS=");
USB_send(u2str(getFPS()));
USB_send("\n");
return NULL;
case 'R':
USB_send("Soft reset\n");
NVIC_SystemReset();
break;
case 'W':
USB_send("Wait for reboot\n");
while(1){nop();};
break;
case 'Z':
countms = 1;
return "Start\n";
break;
case 'z':
countms = 0;
return "Stop\n";
break;
default:
return helpmsg;
}
return NULL;
}else{
switch(*buf){
case 'C':
if(getnum(buf+1, &N)){
ScreenOFF();
setBGcolor(N);
ClearScreen();
ScreenON();
return "Background color\n";
}
return "Wrong color\n";
break;
case 'F':
if(getnum(buf+1, &N)){
setFGcolor(N);
return "Foreground color\n";
}
return "Wrong color\n";
break;
default:
ScreenOFF();
ClearScreen();
PutStringAt(5, SCREEN_HEIGHT-1-curfont->baseline, buf);
ScreenON();
}
return buf;
}
return NULL;
}
// return string with number `val`
char *u2str(uint32_t val){
static char strbuf[11];
char *bufptr = &strbuf[10];
*bufptr = 0;
if(!val){
*(--bufptr) = '0';
}else{
while(val){
*(--bufptr) = val % 10 + '0';
val /= 10;
}
}
return bufptr;
}

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef PROTO_H__
#define PROTO_H__
#include <stm32f1.h>
const char *parse_cmd(const char *buf);
void printu(uint32_t val);
void printuhex(uint32_t val);
char *omit_spaces(const char *buf);
char *getnum(const char *buf, uint32_t *N);
char *u2str(uint32_t val);
#endif // PROTO_H__

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/*
* This file is part of the LED_screen project.
* Copyright 2019 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h> // memset, memcpy
#include <stdio.h>
#include "fonts.h"
#include "hardware.h"
#include "screen.h"
//#include "usb.h"
// !!!FOR LITTLE-ENDIAN!!!
// X coordinate - from left to right!
// Y coordinate - from top to bottom!
// (0,0) is top left corner
// all-screen buffer
static uint8_t screenbuf[SCREENBUF_SZ];
extern volatile uint32_t Tms; // time for FPS count
static uint32_t FPS = 0, Tfps = 0; // approx FPS
uint32_t getFPS(){return FPS;}
static uint8_t fgColor = 0xff, bgColor = 0; // foreground and background colors
void setBGcolor(uint8_t c){bgColor = c;}
void setFGcolor(uint8_t c){fgColor = c;}
/**
* @brief FillScreen - fill screen buffer with current bgColor
*/
void ClearScreen(){
for(int i = 0; i < SCREENBUF_SZ; ++i)
screenbuf[i] = bgColor;
for(int i = 0; i < 32; ++i){
DrawPix(0,i,0b11111111); // white
DrawPix(27,i,0b11100000); // red
DrawPix(34,i,0b00011100); // green
DrawPix(63,i,0b00000011); // blue
}
// memset -> halt
//memset(screenbuf, pattern, SCREENBUF_SZ);
}
/**
* @brief DrawPix - set or clear pixel
* @param X, Y - pixel coordinates (could be outside of screen)
* @param pix - == pixel color (RRRGGGBB)
*/
void DrawPix(int16_t X, int16_t Y, uint8_t pix){
if(X < 0 || X > SCREEN_WIDTH-1 || Y < 0 || Y > SCREEN_HEIGHT-1) return; // outside of screen
// now calculate coordinate of pixel
screenbuf[Y*SCREEN_WIDTH + X] = pix;
}
void InvertPix(int16_t X, int16_t Y){
if(X < 0 || X > SCREEN_WIDTH-1 || Y < 0 || Y > SCREEN_HEIGHT-1) return; // outside of screen
screenbuf[Y*SCREEN_WIDTH + X] = ~screenbuf[Y*SCREEN_WIDTH + X];
}
void XORPix(int16_t X, int16_t Y, uint8_t pix){
if(X < 0 || X > SCREEN_WIDTH-1 || Y < 0 || Y > SCREEN_HEIGHT-1) return; // outside of screen
screenbuf[Y*SCREEN_WIDTH + X] ^= pix;
}
/**
* @brief DrawCharAt - draws character @ position X,Y (this point is left baseline corner of char!)
* character will be drawn with current fg and bg colors
* @param X, Y - started point
* @param Char - char to draw
* @return char width
*/
uint8_t DrawCharAt(int16_t X, int16_t Y, uint8_t Char){
const uint8_t *curchar = font_char(Char);
if(!curchar) return 0;
// now change Y coordinate to left upper corner of font
Y += 1 - curfont->height + curfont->baseline;
// height and width of letter in pixels
uint8_t h = curfont->height, w = *curchar++; // now curchar is pointer to bits array
uint8_t lw = curfont->bytes / h; // width of letter in bytes
for(uint8_t row = 0; row <= h; ++row){
for(uint8_t col = 0; col < w; ++col){
if(curchar[row*lw + (col/8)] & (1 << (7 - (col%8))))
DrawPix(X + col, Y + row, fgColor);
else
DrawPix(X + col, Y + row, bgColor);
}
}
return w;
}
/**
* @brief PutStringAt - draw text string @ screen
* @param X, Y - base coordinates
* @param str - string to draw
* @return - text width in pixels
*/
uint8_t PutStringAt(int16_t X, int16_t Y, const char *str){
if(!str) return 0;
int16_t Xold = X;
while(*str){
X += DrawCharAt(X, Y, (uint8_t)*str++);
}
return X - Xold;
}
uint8_t *getScreenBuf(){return screenbuf;}
static screen_state ScrnState = SCREEN_RELAX;
screen_state getScreenState(){return ScrnState;}
static uint8_t currentB = 0; // current block number
static uint8_t Ntick = 0; // tick number (0..7) for PWM color
/**
* @brief process_screen - screen state machine processing
*/
void process_screen(){
static uint32_t framecnt = 0;
switch(ScrnState){
case SCREEN_ACTIVE: // transmission active
if(transfer_done){
ScrnState = SCREEN_UPDATENXT;
}else return;
// fallthrough
case SCREEN_UPDATENXT:
ConvertScreenBuf(screenbuf, currentB, Ntick); // convert data
TIM_DMA_transfer(currentB); // start transfer
ScrnState = SCREEN_ACTIVE;
if(++currentB >= NBLOCKS){
currentB = 0; // start again
if(++Ntick >= 7){
Ntick = 0;
++framecnt;
if(Tms - Tfps > 999){
FPS = framecnt;
Tfps = Tms;
framecnt = 0;
}
}
}
break;
default:
return;
}
}
/**
* @brief ShowScreen - turn on data transmission
*/
void ScreenON(){
ScrnState = SCREEN_UPDATENXT;
Tfps = Tms;
}
void ScreenOFF(){
stopTIMDMA();
SET(nOE);
ScrnState = SCREEN_RELAX;
currentB = 0;
Ntick = 0;
}
/**
* @brief RGB2pack - convert RGB color to packed RRRGGGBB
* @param RGB - color (each in range 0..8)
* @return packed color
*/
uint8_t RGB2pack(const uint8_t *RGB){
uint8_t b = RGB[2] & 7;
if(b) b = (b - 1) >> 1;
return ((RGB[0] & 7)<<5 | (RGB[1] & 7) << 2 | b);
}
/**
* @brief pack2RGB - convert packed color to array of RGB (0..8)
* @param pack - packed color
* @return RGB array
*/
uint8_t *pack2RGB(uint8_t pack){
static uint8_t RGB[3];
RGB[0] = pack >> 5;
RGB[1] = (pack & 0x1c) >> 2;
pack &= 3;
if(pack) RGB[2] = (pack<<1) + 1;
else RGB[2] = 0;
return RGB;
}

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/*
* This file is part of the LED_screen project.
* Copyright 2019 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h> // memset, memcpy
#include <stdio.h>
#include "fonts.h"
#include "hardware.h"
#include "screen.h"
//#include "usb.h"
// !!!FOR LITTLE-ENDIAN!!!
// X coordinate - from left to right!
// Y coordinate - from top to bottom!
// (0,0) is top left corner
// all-screen buffer
static uint8_t screenbuf[SCREENBUF_SZ];
extern volatile uint32_t Tms; // time for FPS count
static uint32_t FPS = 0, Tfps = 0; // approx FPS
uint32_t getFPS(){return FPS;}
static uint8_t fgColor = 0xff, bgColor = 0; // foreground and background colors
void setBGcolor(uint8_t c){bgColor = c;}
void setFGcolor(uint8_t c){fgColor = c;}
/**
* @brief FillScreen - fill screen buffer with current bgColor
*/
void ClearScreen(){
for(int i = 0; i < SCREENBUF_SZ; ++i)
screenbuf[i] = bgColor;
for(int i = 0; i < 32; ++i){
DrawPix(0,i,0b11111111); // white
DrawPix(27,i,0b11100000); // red
DrawPix(34,i,0b00011100); // green
DrawPix(63,i,0b00000011); // blue
} - opendrain output
// memset -> halt
//memset(screenbuf, pattern, SCREENBUF_SZ);
}
/**
* @brief DrawPix - set or clear pixel
* @param X, Y - pixel coordinates (could be outside of screen)
* @param pix - == pixel color (RRRGGGBB)
*/
void DrawPix(int16_t X, int16_t Y, uint8_t pix){
if(X < 0 || X > SCREEN_WIDTH-1 || Y < 0 || Y > SCREEN_HEIGHT-1) return; // outside of screen
// now calculate coordinate of pixel
screenbuf[Y*SCREEN_WIDTH + X] = pix;
}
void InvertPix(int16_t X, int16_t Y){
if(X < 0 || X > SCREEN_WIDTH-1 || Y < 0 || Y > SCREEN_HEIGHT-1) return; // outside of screen
screenbuf[Y*SCREEN_WIDTH + X] = ~screenbuf[Y*SCREEN_WIDTH + X];
}
void XORPix(int16_t X, int16_t Y, uint8_t pix){
if(X < 0 || X > SCREEN_WIDTH-1 || Y < 0 || Y > SCREEN_HEIGHT-1) return; // outside of screen
screenbuf[Y*SCREEN_WIDTH + X] ^= pix;
}
/**
* @brief DrawCharAt - draws character @ position X,Y (this point is left baseline corner of char!)
* character will be drawn with current fg and bg colors
* @param X, Y - started point
* @param Char - char to draw
* @return char width
*/
uint8_t DrawCharAt(int16_t X, int16_t Y, uint8_t Char){
const uint8_t *curchar = font_char(Char);
if(!curchar) return 0;
// now change Y coordinate to left upper corner of font
Y += 1 - curfont->height + curfont->baseline;
// height and width of letter in pixels
uint8_t h = curfont->height, w = *curchar++; // now curchar is pointer to bits array
uint8_t lw = curfont->bytes / h; // width of letter in bytes
for(uint8_t row = 0; row <= h; ++row){
for(uint8_t col = 0; col < w; ++col){
if(curchar[row*lw + (col/8)] & (1 << (7 - (col%8))))
DrawPix(X + col, Y + row, fgColor);
else
DrawPix(X + col, Y + row, bgColor);
}
}
return w;
}
/**
* @brief PutStringAt - draw text string @ screen
* @param X, Y - base coordinates
* @param str - string to draw
* @return - text width in pixels
*/
uint8_t PutStringAt(int16_t X, int16_t Y, const char *str){
if(!str) return 0;
int16_t Xold = X;
while(*str){
X += DrawCharAt(X, Y, (uint8_t)*str++);
}
return X - Xold;
}
uint8_t *getScreenBuf(){return screenbuf;}
static screen_state ScrnState = SCREEN_RELAX;
screen_state getScreenState(){return ScrnState;}
static uint8_t currentB = 0; // current block number
static uint8_t Ntick = 0; // tick number (0..7) for PWM color
/**
* @brief process_screen - screen state machine processing
*/
void process_screen(){
static uint32_t framecnt = 0;
switch(ScrnState){
case SCREEN_ACTIVE: // transmission active
if(transfer_done){
ScrnState = SCREEN_UPDATENXT;
}else return;
// fallthrough
case SCREEN_UPDATENXT:
ConvertScreenBuf(screenbuf, currentB, Ntick); // convert data
TIM_DMA_transfer(currentB); // start transfer
ScrnState = SCREEN_ACTIVE;
if(++currentB >= NBLOCKS){
currentB = 0; // start again
if(++Ntick >= 7){
Ntick = 0;
++framecnt;
if(Tms - Tfps > 999){
FPS = framecnt;
Tfps = Tms;
framecnt = 0;
}
}
}
break;
default:
return;
}
}
/**
* @brief ShowScreen - turn on data transmission
*/
void ScreenON(){
ScrnState = SCREEN_UPDATENXT;
Tfps = Tms;
}
void ScreenOFF(){
stopTIMDMA();
SET(nOE);
ScrnState = SCREEN_RELAX;
currentB = 0;
Ntick = 0;
}
/**
* @brief RGB2pack - convert RGB color to packed RRRGGGBB
* @param RGB - color (each in range 0..8)
* @return packed color
*/
uint8_t RGB2pack(const uint8_t *RGB){
uint8_t b = RGB[2] & 7;
if(b) b = (b - 1) >> 1;
return ((RGB[0] & 7)<<5 | (RGB[1] & 7) << 2 | b);
}
/**
* @brief pack2RGB - convert packed color to array of RGB (0..8)
* @param pack - packed color
* @return RGB array
*/
uint8_t *pack2RGB(uint8_t pack){
static uint8_t RGB[3];
RGB[0] = pack >> 5;
RGB[1] = (pack & 0x1c) >> 2;
pack &= 3;
if(pack) RGB[2] = (pack<<1) + 1;
else RGB[2] = 0;
return RGB;
}

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/*
* This file is part of the LED_screen project.
* Copyright 2019 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef SCREEN_H__
#define SCREEN_H__
#include <stdint.h>
// display size in px
// PANEL_WIDTH is width of one panel
//#define PANEL_WIDTH (64)
// SCREEN_WIDTH is total screen width
#define SCREEN_WIDTH (64)
#define SCREEN_HEIGHT (32)
#define SCREENBUF_SZ (SCREEN_WIDTH*SCREEN_HEIGHT)
// amount of blocks @ screen
#define NBLOCKS (16)
// pause to show a quater of screen - 10ms (25Hz framerate)
#define SCREEN_PAUSE (3)
typedef enum{ // screen states
SCREEN_RELAX, // nothing to do (screen is off)
SCREEN_ACTIVE, // transmission active
SCREEN_UPDATENXT // update next quarter
} screen_state;
screen_state getScreenState();
void ClearScreen();
void setBGcolor(uint8_t c);
void setFGcolor(uint8_t c);
void DrawPix(int16_t X, int16_t Y, uint8_t pix);
void InvertPix(int16_t X, int16_t Y);
void XORPix(int16_t X, int16_t Y, uint8_t pix);
uint8_t DrawCharAt(int16_t X, int16_t Y, uint8_t Char);
uint8_t PutStringAt(int16_t X, int16_t Y, const char *str);
uint8_t *getScreenBuf();
void process_screen();
void ScreenON();
void ScreenOFF();
uint32_t getFPS();
uint8_t RGB2pack(const uint8_t *RGB);
uint8_t *pack2RGB(uint8_t pack);
#endif // SCREEN_H__

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "usb.h"
#include "usb_lib.h"
static volatile uint8_t tx_succesfull = 1;
static volatile uint8_t rxNE = 0;
static int sstrlen(const char *s){
if(!s) return 0;
int l = 0;
while(*s++) ++l;
return l;
}
// interrupt IN handler (never used?)
static void EP1_Handler(){
uint16_t epstatus = KEEP_DTOG(USB->EPnR[1]);
if(RX_FLAG(epstatus)) epstatus = (epstatus & ~USB_EPnR_STAT_TX) ^ USB_EPnR_STAT_RX; // set valid RX
else epstatus = epstatus & ~(USB_EPnR_STAT_TX|USB_EPnR_STAT_RX);
// clear CTR
epstatus = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX));
USB->EPnR[1] = epstatus;
}
// data IN/OUT handlers
static void transmit_Handler(){ // EP3IN
tx_succesfull = 1;
uint16_t epstatus = KEEP_DTOG_STAT(USB->EPnR[3]);
// clear CTR keep DTOGs & STATs
USB->EPnR[3] = (epstatus & ~(USB_EPnR_CTR_TX)); // clear TX ctr
}
static void receive_Handler(){ // EP2OUT
rxNE = 1;
uint16_t epstatus = KEEP_DTOG_STAT(USB->EPnR[2]);
USB->EPnR[2] = (epstatus & ~(USB_EPnR_CTR_RX)); // clear RX ctr
}
void USB_setup(){
NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
NVIC_DisableIRQ(USB_HP_CAN1_TX_IRQn);
RCC->APB1ENR |= RCC_APB1ENR_USBEN;
USB->CNTR = USB_CNTR_FRES; // Force USB Reset
for(uint32_t ctr = 0; ctr < 72000; ++ctr) nop(); // wait >1ms
//uint32_t ctr = 0;
USB->CNTR = 0;
USB->BTABLE = 0;
USB->DADDR = 0;
USB->ISTR = 0;
USB->CNTR = USB_CNTR_RESETM | USB_CNTR_WKUPM; // allow only wakeup & reset interrupts
NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
}
static int usbwr(const char *buf, int l){
uint32_t ctra = 1000000;
while(--ctra && tx_succesfull == 0){
IWDG->KR = IWDG_REFRESH;
}
tx_succesfull = 0;
EP_Write(3, (uint8_t*)buf, l);
ctra = 1000000;
while(--ctra && tx_succesfull == 0){
IWDG->KR = IWDG_REFRESH;
}
if(tx_succesfull == 0){usbON = 0; return 1;} // usb is OFF?
return 0;
}
static char usbbuff[USB_TXBUFSZ-1]; // temporary buffer (63 - to prevent need of ZLP)
static int buflen = 0; // amount of symbols in usbbuff
// send next up to 63 bytes of data in usbbuff
static void send_next(){
if(!buflen || !tx_succesfull) return;
tx_succesfull = 0;
EP_Write(3, (uint8_t*)usbbuff, buflen);
buflen = 0;
}
// unblocking sending - just fill a buffer
void USB_send(const char *buf){
int len = sstrlen(buf);
if(!usbON || !len) return;
if(len > USB_TXBUFSZ-1 - buflen){
usbwr(usbbuff, buflen);
buflen = 0;
}
if(len > USB_TXBUFSZ-1){
USB_send_blk(buf, len);
return;
}
while(len--) usbbuff[buflen++] = *buf++;
}
// blocking sending
void USB_send_blk(const char *buf, int len){
if(!usbON || !len) return; // USB disconnected
if(buflen){
usbwr(usbbuff, buflen);
buflen = 0;
}
int needzlp = 0;
while(len){
if(len == USB_TXBUFSZ) needzlp = 1;
int s = (len > USB_TXBUFSZ) ? USB_TXBUFSZ : len;
if(usbwr(buf, s)) return;
len -= s;
buf += s;
}
if(needzlp){
usbwr(NULL, 0);
}
}
void usb_proc(){
switch(USB_Dev.USB_Status){
case USB_STATE_CONFIGURED:
// make new BULK endpoint
// Buffer have 1024 bytes, but last 256 we use for CAN bus (30.2 of RM: USB main features)
EP_Init(1, EP_TYPE_INTERRUPT, USB_EP1BUFSZ, 0, EP1_Handler); // IN1 - transmit
EP_Init(2, EP_TYPE_BULK, 0, USB_RXBUFSZ, receive_Handler); // OUT2 - receive data
EP_Init(3, EP_TYPE_BULK, USB_TXBUFSZ, 0, transmit_Handler); // IN3 - transmit data
USB_Dev.USB_Status = USB_STATE_CONNECTED;
break;
case USB_STATE_DEFAULT:
case USB_STATE_ADDRESSED:
if(usbON){
usbON = 0;
}
break;
default: // USB_STATE_CONNECTED - send next data portion
if(!usbON) return;
send_next();
}
}
/**
* @brief USB_receive
* @param buf (i) - buffer[64] for received data
* @return amount of received bytes
*/
int USB_receive(char *buf){
if(!usbON || !rxNE) return 0;
int sz = EP_Read(2, (uint16_t*)buf);
uint16_t epstatus = KEEP_DTOG(USB->EPnR[2]);
// keep stat_tx & set ACK rx
USB->EPnR[2] = (epstatus & ~(USB_EPnR_STAT_TX)) ^ USB_EPnR_STAT_RX;
rxNE = 0;
return sz;
}

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef __USB_H__
#define __USB_H__
#include "hardware.h"
#define BUFFSIZE (64)
void USB_setup();
void usb_proc();
void USB_send(const char *buf);
void USB_send_blk(const char *buf, int len);
int USB_receive(char *buf);
#endif // __USB_H__

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef __USB_DEFS_H__
#define __USB_DEFS_H__
#include <stm32f1.h>
// max endpoints number
#define STM32ENDPOINTS 8
/**
* Buffers size definition
**/
#define USB_BTABLE_SIZE 512
// first 64 bytes of USB_BTABLE are registers!
//#define USB_EP0_BASEADDR 64
// for USB FS EP0 buffers are from 8 to 64 bytes long (64 for PL2303)
#define USB_EP0_BUFSZ 64
// USB transmit buffer size (64 for PL2303)
#define USB_TXBUFSZ 64
// USB receive buffer size (64 for PL2303)
#define USB_RXBUFSZ 64
// EP1 - interrupt - buffer size
#define USB_EP1BUFSZ 8
#define USB_BTABLE_BASE 0x40006000
#define USB_BASE ((uint32_t)0x40005C00)
#define USB ((USB_TypeDef *) USB_BASE)
#ifdef USB_BTABLE
#undef USB_BTABLE
#endif
#define USB_BTABLE ((USB_BtableDef *)(USB_BTABLE_BASE))
#define USB_ISTR_EPID 0x0000000F
#define USB_FNR_LSOF_0 0x00000800
#define USB_FNR_lSOF_1 0x00001000
#define USB_LPMCSR_BESL_0 0x00000010
#define USB_LPMCSR_BESL_1 0x00000020
#define USB_LPMCSR_BESL_2 0x00000040
#define USB_LPMCSR_BESL_3 0x00000080
#define USB_EPnR_CTR_RX 0x00008000
#define USB_EPnR_DTOG_RX 0x00004000
#define USB_EPnR_STAT_RX 0x00003000
#define USB_EPnR_STAT_RX_0 0x00001000
#define USB_EPnR_STAT_RX_1 0x00002000
#define USB_EPnR_SETUP 0x00000800
#define USB_EPnR_EP_TYPE 0x00000600
#define USB_EPnR_EP_TYPE_0 0x00000200
#define USB_EPnR_EP_TYPE_1 0x00000400
#define USB_EPnR_EP_KIND 0x00000100
#define USB_EPnR_CTR_TX 0x00000080
#define USB_EPnR_DTOG_TX 0x00000040
#define USB_EPnR_STAT_TX 0x00000030
#define USB_EPnR_STAT_TX_0 0x00000010
#define USB_EPnR_STAT_TX_1 0x00000020
#define USB_EPnR_EA 0x0000000F
#define USB_COUNTn_RX_BLSIZE 0x00008000
#define USB_COUNTn_NUM_BLOCK 0x00007C00
#define USB_COUNTn_RX 0x0000003F
#ifdef USB_TypeDef
#define USB_TypeDef USB_TypeDef_custom
#endif
typedef struct {
__IO uint32_t EPnR[STM32ENDPOINTS];
__IO uint32_t RESERVED[STM32ENDPOINTS];
__IO uint32_t CNTR;
__IO uint32_t ISTR;
__IO uint32_t FNR;
__IO uint32_t DADDR;
__IO uint32_t BTABLE;
} USB_TypeDef;
typedef struct{
__IO uint32_t USB_ADDR_TX;
__IO uint32_t USB_COUNT_TX;
__IO uint32_t USB_ADDR_RX;
__IO uint32_t USB_COUNT_RX;
} USB_EPDATA_TypeDef;
typedef struct{
__IO USB_EPDATA_TypeDef EP[STM32ENDPOINTS];
} USB_BtableDef;
#endif // __USB_DEFS_H__

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include "usb_lib.h"
ep_t endpoints[STM32ENDPOINTS];
usb_dev_t USB_Dev;
static usb_LineCoding lineCoding = {115200, 0, 0, 8};
static config_pack_t setup_packet;
static uint8_t ep0databuf[EP0DATABUF_SIZE];
static uint8_t ep0dbuflen = 0;
usb_LineCoding getLineCoding(){return lineCoding;}
uint8_t usbON = 0; // device disconnected from terminal
// definition of parts common for USB_DeviceDescriptor & USB_DeviceQualifierDescriptor
#define bcdUSB_L 0x10
#define bcdUSB_H 0x01
#define bDeviceClass 0
#define bDeviceSubClass 0
#define bDeviceProtocol 0
#define bNumConfigurations 1
static const uint8_t USB_DeviceDescriptor[] = {
18, // bLength
0x01, // bDescriptorType - Device descriptor
bcdUSB_L, // bcdUSB_L - 1.10
bcdUSB_H, // bcdUSB_H
bDeviceClass, // bDeviceClass - USB_COMM
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0_BUFSZ, // bMaxPacketSize
0x7b, // idVendor_L PL2303: VID=0x067b, PID=0x2303
0x06, // idVendor_H
0x03, // idProduct_L
0x23, // idProduct_H
0x00, // bcdDevice_Ver_L
0x03, // bcdDevice_Ver_H
0x01, // iManufacturer
0x02, // iProduct
0x00, // iSerialNumber
bNumConfigurations // bNumConfigurations
};
static const uint8_t USB_DeviceQualifierDescriptor[] = {
10, //bLength
0x06, // bDescriptorType - Device qualifier
bcdUSB_L, // bcdUSB_L
bcdUSB_H, // bcdUSB_H
bDeviceClass, // bDeviceClass
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0_BUFSZ, // bMaxPacketSize0
bNumConfigurations, // bNumConfigurations
0x00 // Reserved
};
static const uint8_t USB_ConfigDescriptor[] = {
/*Configuration Descriptor*/
0x09, /* bLength: Configuration Descriptor size */
0x02, /* bDescriptorType: Configuration */
39, /* wTotalLength:no of returned bytes */
0x00,
0x01, /* bNumInterfaces: 1 interface */
0x01, /* bConfigurationValue: Configuration value */
0x00, /* iConfiguration: Index of string descriptor describing the configuration */
0xa0, /* bmAttributes - Bus powered, Remote wakeup */
0x32, /* MaxPower 100 mA */
/*---------------------------------------------------------------------------*/
/*Interface Descriptor */
0x09, /* bLength: Interface Descriptor size */
0x04, /* bDescriptorType: Interface */
0x00, /* bInterfaceNumber: Number of Interface */
0x00, /* bAlternateSetting: Alternate setting */
0x03, /* bNumEndpoints: 3 endpoints used */
0xff, /* bInterfaceClass */
0x00, /* bInterfaceSubClass */
0x00, /* bInterfaceProtocol */
0x00, /* iInterface: */
///////////////////////////////////////////////////
/*Endpoint 1 Descriptor*/
0x07, /* bLength: Endpoint Descriptor size */
0x05, /* bDescriptorType: Endpoint */
0x81, /* bEndpointAddress IN1 */
0x03, /* bmAttributes: Interrupt */
0x0a, /* wMaxPacketSize LO: */
0x00, /* wMaxPacketSize HI: */
0x01, /* bInterval: */
/*Endpoint OUT2 Descriptor*/
0x07, /* bLength: Endpoint Descriptor size */
0x05, /* bDescriptorType: Endpoint */
0x02, /* bEndpointAddress: OUT2 */
0x02, /* bmAttributes: Bulk */
(USB_RXBUFSZ & 0xff), /* wMaxPacketSize: 64 */
(USB_RXBUFSZ >> 8),
0x00, /* bInterval: ignore for Bulk transfer */
/*Endpoint IN3 Descriptor*/
0x07, /* bLength: Endpoint Descriptor size */
0x05, /* bDescriptorType: Endpoint */
0x83, /* bEndpointAddress IN3 */
0x02, /* bmAttributes: Bulk */
(USB_TXBUFSZ & 0xff), /* wMaxPacketSize: 64 */
(USB_TXBUFSZ >> 8),
0x00, /* bInterval: ignore for Bulk transfer */
};
_USB_LANG_ID_(USB_StringLangDescriptor, LANG_US);
// these descriptors are not used in PL2303 emulator!
_USB_STRING_(USB_StringSerialDescriptor, u"0");
_USB_STRING_(USB_StringManufacturingDescriptor, u"Prolific Technology Inc.");
_USB_STRING_(USB_StringProdDescriptor, u"USB-Serial Controller");
/*
* default handlers
*/
// SET_LINE_CODING
void WEAK linecoding_handler(usb_LineCoding __attribute__((unused)) *lc){
}
// SET_CONTROL_LINE_STATE
void WEAK clstate_handler(uint16_t __attribute__((unused)) val){
}
// SEND_BREAK
void WEAK break_handler(){
}
// handler of vendor requests
void WEAK vendor_handler(config_pack_t *packet){
if(packet->bmRequestType & 0x80){ // read
uint8_t c;
switch(packet->wValue){
case 0x8484:
c = 2;
break;
case 0x0080:
c = 1;
break;
case 0x8686:
c = 0xaa;
break;
default:
c = 0;
}
EP_WriteIRQ(0, &c, 1);
}else{ // write ZLP
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
}
static void wr0(const uint8_t *buf, uint16_t size){
if(setup_packet.wLength < size) size = setup_packet.wLength; // shortened request
if(size < endpoints[0].txbufsz){
EP_WriteIRQ(0, buf, size);
return;
}
while(size){
uint16_t l = size;
if(l > endpoints[0].txbufsz) l = endpoints[0].txbufsz;
EP_WriteIRQ(0, buf, l);
buf += l;
size -= l;
uint8_t needzlp = (l == endpoints[0].txbufsz) ? 1 : 0;
if(size || needzlp){ // send last data buffer
uint16_t status = KEEP_DTOG(USB->EPnR[0]);
// keep DTOGs, clear CTR_RX,TX, set TX VALID, leave stat_Rx
USB->EPnR[0] = (status & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX|USB_EPnR_STAT_RX))
^ USB_EPnR_STAT_TX;
uint32_t ctr = 1000000;
while(--ctr && (USB->ISTR & USB_ISTR_CTR) == 0){IWDG->KR = IWDG_REFRESH;};
if((USB->ISTR & USB_ISTR_CTR) == 0){
return;
}
if(needzlp) EP_WriteIRQ(0, (uint8_t*)0, 0);
}
}
}
static inline void get_descriptor(){
switch(setup_packet.wValue){
case DEVICE_DESCRIPTOR:
wr0(USB_DeviceDescriptor, sizeof(USB_DeviceDescriptor));
break;
case CONFIGURATION_DESCRIPTOR:
wr0(USB_ConfigDescriptor, sizeof(USB_ConfigDescriptor));
break;
case STRING_LANG_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringLangDescriptor, STRING_LANG_DESCRIPTOR_SIZE_BYTE);
break;
case STRING_MAN_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringManufacturingDescriptor, USB_StringManufacturingDescriptor.bLength);
break;
case STRING_PROD_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringProdDescriptor, USB_StringProdDescriptor.bLength);
break;
case STRING_SN_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringSerialDescriptor, USB_StringSerialDescriptor.bLength);
break;
case DEVICE_QUALIFIER_DESCRIPTOR:
wr0(USB_DeviceQualifierDescriptor, USB_DeviceQualifierDescriptor[0]);
break;
default:
break;
}
}
static uint8_t configuration = 0; // reply for GET_CONFIGURATION (==1 if configured)
static inline void std_d2h_req(){
uint16_t status = 0; // bus powered
switch(setup_packet.bRequest){
case GET_DESCRIPTOR:
get_descriptor();
break;
case GET_STATUS:
EP_WriteIRQ(0, (uint8_t *)&status, 2); // send status: Bus Powered
break;
case GET_CONFIGURATION:
EP_WriteIRQ(0, &configuration, 1);
break;
default:
break;
}
}
static inline void std_h2d_req(){
switch(setup_packet.bRequest){
case SET_ADDRESS:
// new address will be assigned later - after acknowlegement or request to host
USB_Dev.USB_Addr = setup_packet.wValue;
break;
case SET_CONFIGURATION:
// Now device configured
USB_Dev.USB_Status = USB_STATE_CONFIGURED;
configuration = setup_packet.wValue;
break;
default:
break;
}
}
/*
bmRequestType: 76543210
7 direction: 0 - host->device, 1 - device->host
65 type: 0 - standard, 1 - class, 2 - vendor
4..0 getter: 0 - device, 1 - interface, 2 - endpoint, 3 - other
*/
/**
* Endpoint0 (control) handler
*/
static void EP0_Handler(){
uint16_t epstatus = USB->EPnR[0]; // EP0R on input -> return this value after modifications
uint8_t reqtype = setup_packet.bmRequestType & 0x7f;
uint8_t dev2host = (setup_packet.bmRequestType & 0x80) ? 1 : 0;
int rxflag = RX_FLAG(epstatus);
if(rxflag && SETUP_FLAG(epstatus)){
switch(reqtype){
case STANDARD_DEVICE_REQUEST_TYPE: // standard device request
if(dev2host){
std_d2h_req();
}else{
std_h2d_req();
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
break;
case STANDARD_ENDPOINT_REQUEST_TYPE: // standard endpoint request
if(setup_packet.bRequest == CLEAR_FEATURE){
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
break;
case VENDOR_REQUEST_TYPE:
vendor_handler(&setup_packet);
break;
case CONTROL_REQUEST_TYPE:
switch(setup_packet.bRequest){
case GET_LINE_CODING:
EP_WriteIRQ(0, (uint8_t*)&lineCoding, sizeof(lineCoding));
break;
case SET_LINE_CODING: // omit this for next stage, when data will come
break;
case SET_CONTROL_LINE_STATE:
usbON = 1;
clstate_handler(setup_packet.wValue);
break;
case SEND_BREAK:
usbON = 0;
break_handler();
break;
default:
break;
}
if(setup_packet.bRequest != GET_LINE_CODING) EP_WriteIRQ(0, (uint8_t *)0, 0); // write acknowledgement
break;
default:
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
}else if(rxflag){ // got data over EP0 or host acknowlegement
if(endpoints[0].rx_cnt){
if(setup_packet.bRequest == SET_LINE_CODING){
linecoding_handler((usb_LineCoding*)ep0databuf);
}
}
} else if(TX_FLAG(epstatus)){ // package transmitted
// now we can change address after enumeration
if ((USB->DADDR & USB_DADDR_ADD) != USB_Dev.USB_Addr){
USB->DADDR = USB_DADDR_EF | USB_Dev.USB_Addr;
// change state to ADRESSED
USB_Dev.USB_Status = USB_STATE_ADDRESSED;
}
}
epstatus = KEEP_DTOG(USB->EPnR[0]);
if(rxflag) epstatus ^= USB_EPnR_STAT_TX; // start ZLP/data transmission
else epstatus &= ~USB_EPnR_STAT_TX; // or leave unchanged
// keep DTOGs, clear CTR_RX,TX, set RX VALID
USB->EPnR[0] = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX)) ^ USB_EPnR_STAT_RX;
}
static uint16_t lastaddr = LASTADDR_DEFAULT;
/**
* Endpoint initialisation
* @param number - EP num (0...7)
* @param type - EP type (EP_TYPE_BULK, EP_TYPE_CONTROL, EP_TYPE_ISO, EP_TYPE_INTERRUPT)
* @param txsz - transmission buffer size @ USB/CAN buffer
* @param rxsz - reception buffer size @ USB/CAN buffer
* @param uint16_t (*func)(ep_t *ep) - EP handler function
* @return 0 if all OK
*/
int EP_Init(uint8_t number, uint8_t type, uint16_t txsz, uint16_t rxsz, void (*func)(ep_t ep)){
if(number >= STM32ENDPOINTS) return 4; // out of configured amount
if(txsz > USB_BTABLE_SIZE || rxsz > USB_BTABLE_SIZE) return 1; // buffer too large
if(lastaddr + txsz + rxsz >= USB_BTABLE_SIZE) return 2; // out of btable
USB->EPnR[number] = (type << 9) | (number & USB_EPnR_EA);
USB->EPnR[number] ^= USB_EPnR_STAT_RX | USB_EPnR_STAT_TX_1;
if(rxsz & 1 || rxsz > 512) return 3; // wrong rx buffer size
uint16_t countrx = 0;
if(rxsz < 64) countrx = rxsz / 2;
else{
if(rxsz & 0x1f) return 3; // should be multiple of 32
countrx = 31 + rxsz / 32;
}
USB_BTABLE->EP[number].USB_ADDR_TX = lastaddr;
endpoints[number].tx_buf = (uint16_t *)(USB_BTABLE_BASE + lastaddr*2);
endpoints[number].txbufsz = txsz;
lastaddr += txsz;
USB_BTABLE->EP[number].USB_COUNT_TX = 0;
USB_BTABLE->EP[number].USB_ADDR_RX = lastaddr;
endpoints[number].rx_buf = (uint16_t *)(USB_BTABLE_BASE + lastaddr*2);
lastaddr += rxsz;
USB_BTABLE->EP[number].USB_COUNT_RX = countrx << 10;
endpoints[number].func = func;
return 0;
}
// standard IRQ handler
void usb_lp_can_rx0_isr(){
if(USB->ISTR & USB_ISTR_RESET){
usbON = 0;
// Reinit registers
USB->CNTR = USB_CNTR_RESETM | USB_CNTR_CTRM | USB_CNTR_SUSPM | USB_CNTR_WKUPM;
USB->ISTR = 0;
// Endpoint 0 - CONTROL
// ON USB LS size of EP0 may be 8 bytes, but on FS it should be 64 bytes!
lastaddr = LASTADDR_DEFAULT;
// clear address, leave only enable bit
USB->DADDR = USB_DADDR_EF;
USB_Dev.USB_Status = USB_STATE_DEFAULT;
USB->ISTR = ~USB_ISTR_RESET;
if(EP_Init(0, EP_TYPE_CONTROL, USB_EP0_BUFSZ, USB_EP0_BUFSZ, EP0_Handler)){
return;
}
}
if(USB->ISTR & USB_ISTR_CTR){
// EP number
uint8_t n = USB->ISTR & USB_ISTR_EPID;
// copy status register
uint16_t epstatus = USB->EPnR[n];
// copy received bytes amount
endpoints[n].rx_cnt = USB_BTABLE->EP[n].USB_COUNT_RX & 0x3FF; // low 10 bits is counter
// check direction
if(USB->ISTR & USB_ISTR_DIR){ // OUT interrupt - receive data, CTR_RX==1 (if CTR_TX == 1 - two pending transactions: receive following by transmit)
if(n == 0){ // control endpoint
if(epstatus & USB_EPnR_SETUP){ // setup packet -> copy data to conf_pack
EP_Read(0, (uint16_t*)&setup_packet);
ep0dbuflen = 0;
// interrupt handler will be called later
}else if(epstatus & USB_EPnR_CTR_RX){ // data packet -> push received data to ep0databuf
ep0dbuflen = endpoints[0].rx_cnt;
EP_Read(0, (uint16_t*)&ep0databuf);
}
}
}
// call EP handler
if(endpoints[n].func) endpoints[n].func(endpoints[n]);
}
if(USB->ISTR & USB_ISTR_SUSP){ // suspend -> still no connection, may sleep
usbON = 0;
USB->CNTR |= USB_CNTR_FSUSP | USB_CNTR_LP_MODE;
USB->ISTR = ~USB_ISTR_SUSP;
}
if(USB->ISTR & USB_ISTR_WKUP){ // wakeup
USB->CNTR &= ~(USB_CNTR_FSUSP | USB_CNTR_LP_MODE); // clear suspend flags
USB->ISTR = ~USB_ISTR_WKUP;
}
}
/**
* Write data to EP buffer (called from IRQ handler)
* @param number - EP number
* @param *buf - array with data
* @param size - its size
*/
void EP_WriteIRQ(uint8_t number, const uint8_t *buf, uint16_t size){
uint8_t i;
if(size > endpoints[number].txbufsz) size = endpoints[number].txbufsz;
uint16_t N2 = (size + 1) >> 1;
// the buffer is 16-bit, so we should copy data as it would be uint16_t
uint16_t *buf16 = (uint16_t *)buf;
uint32_t *out = (uint32_t *)endpoints[number].tx_buf;
for(i = 0; i < N2; ++i, ++out){
*out = buf16[i];
}
USB_BTABLE->EP[number].USB_COUNT_TX = size;
}
/**
* Write data to EP buffer (called outside IRQ handler)
* @param number - EP number
* @param *buf - array with data
* @param size - its size
*/
void EP_Write(uint8_t number, const uint8_t *buf, uint16_t size){
EP_WriteIRQ(number, buf, size);
uint16_t status = KEEP_DTOG(USB->EPnR[number]);
// keep DTOGs, clear CTR_TX & set TX VALID to start transmission
USB->EPnR[number] = (status & ~(USB_EPnR_CTR_TX)) ^ USB_EPnR_STAT_TX;
}
/*
* Copy data from EP buffer into user buffer area
* @param *buf - user array for data
* @return amount of data read
*/
int EP_Read(uint8_t number, uint16_t *buf){
int sz = endpoints[number].rx_cnt;
if(!sz) return 0;
endpoints[number].rx_cnt = 0;
int n = (sz + 1) >> 1;
uint32_t *in = (uint32_t *)endpoints[number].rx_buf;
if(n){
for(int i = 0; i < n; ++i, ++in)
buf[i] = *(uint16_t*)in;
}
return sz;
}

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/*
* This file is part of the RGBLEDscreen project.
* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef __USB_LIB_H__
#define __USB_LIB_H__
#include <wchar.h>
#include "usb_defs.h"
#define EP0DATABUF_SIZE (64)
#define LASTADDR_DEFAULT (STM32ENDPOINTS * 8)
// bmRequestType & 0x7f
#define STANDARD_DEVICE_REQUEST_TYPE 0
#define STANDARD_ENDPOINT_REQUEST_TYPE 2
#define VENDOR_REQUEST_TYPE 0x40
#define CONTROL_REQUEST_TYPE 0x21
// bRequest, standard; for bmRequestType == 0x80
#define GET_STATUS 0x00
#define GET_DESCRIPTOR 0x06
#define GET_CONFIGURATION 0x08
// for bmRequestType == 0
#define CLEAR_FEATURE 0x01
#define SET_FEATURE 0x03 // unused
#define SET_ADDRESS 0x05
#define SET_DESCRIPTOR 0x07 // unused
#define SET_CONFIGURATION 0x09
// for bmRequestType == 0x81, 1 or 0xB2
#define GET_INTERFACE 0x0A // unused
#define SET_INTERFACE 0x0B // unused
#define SYNC_FRAME 0x0C // unused
#define VENDOR_REQUEST 0x01 // unused
// Class-Specific Control Requests
#define SEND_ENCAPSULATED_COMMAND 0x00 // unused
#define GET_ENCAPSULATED_RESPONSE 0x01 // unused
#define SET_COMM_FEATURE 0x02 // unused
#define GET_COMM_FEATURE 0x03 // unused
#define CLEAR_COMM_FEATURE 0x04 // unused
#define SET_LINE_CODING 0x20
#define GET_LINE_CODING 0x21
#define SET_CONTROL_LINE_STATE 0x22
#define SEND_BREAK 0x23
// control line states
#define CONTROL_DTR 0x01
#define CONTROL_RTS 0x02
// wValue
#define DEVICE_DESCRIPTOR 0x100
#define CONFIGURATION_DESCRIPTOR 0x200
#define STRING_LANG_DESCRIPTOR 0x300
#define STRING_MAN_DESCRIPTOR 0x301
#define STRING_PROD_DESCRIPTOR 0x302
#define STRING_SN_DESCRIPTOR 0x303
#define DEVICE_QUALIFIER_DESCRIPTOR 0x600
#define RX_FLAG(epstat) (epstat & USB_EPnR_CTR_RX)
#define TX_FLAG(epstat) (epstat & USB_EPnR_CTR_TX)
#define SETUP_FLAG(epstat) (epstat & USB_EPnR_SETUP)
// EPnR bits manipulation
#define KEEP_DTOG_STAT(EPnR) (EPnR & ~(USB_EPnR_STAT_RX|USB_EPnR_STAT_TX|USB_EPnR_DTOG_RX|USB_EPnR_DTOG_TX))
#define KEEP_DTOG(EPnR) (EPnR & ~(USB_EPnR_DTOG_RX|USB_EPnR_DTOG_TX))
// USB state: uninitialized, addressed, ready for use
typedef enum{
USB_STATE_DEFAULT,
USB_STATE_ADDRESSED,
USB_STATE_CONFIGURED,
USB_STATE_CONNECTED
} USB_state;
// EP types
#define EP_TYPE_BULK 0x00
#define EP_TYPE_CONTROL 0x01
#define EP_TYPE_ISO 0x02
#define EP_TYPE_INTERRUPT 0x03
#define LANG_US (uint16_t)0x0409
#define _USB_STRING_(name, str) \
static const struct name \
{ \
uint8_t bLength; \
uint8_t bDescriptorType; \
uint16_t bString[(sizeof(str) - 2) / 2]; \
\
} \
name = {sizeof(name), 0x03, str}
#define _USB_LANG_ID_(name, lng_id) \
\
static const struct name \
{ \
uint8_t bLength; \
uint8_t bDescriptorType; \
uint16_t bString; \
\
} \
name = {0x04, 0x03, lng_id}
#define STRING_LANG_DESCRIPTOR_SIZE_BYTE (4)
// EP0 configuration packet
typedef struct {
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} config_pack_t;
// endpoints state
typedef struct{
uint16_t *tx_buf; // transmission buffer address
uint16_t txbufsz; // transmission buffer size
uint16_t *rx_buf; // reception buffer address
void (*func)(); // endpoint action function
unsigned rx_cnt : 10; // received data counter
} ep_t;
// USB status & its address
typedef struct {
uint8_t USB_Status;
uint16_t USB_Addr;
}usb_dev_t;
typedef struct {
uint32_t dwDTERate;
uint8_t bCharFormat;
#define USB_CDC_1_STOP_BITS 0
#define USB_CDC_1_5_STOP_BITS 1
#define USB_CDC_2_STOP_BITS 2
uint8_t bParityType;
#define USB_CDC_NO_PARITY 0
#define USB_CDC_ODD_PARITY 1
#define USB_CDC_EVEN_PARITY 2
#define USB_CDC_MARK_PARITY 3
#define USB_CDC_SPACE_PARITY 4
uint8_t bDataBits;
} __attribute__ ((packed)) usb_LineCoding;
typedef struct {
uint8_t bmRequestType;
uint8_t bNotificationType;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} __attribute__ ((packed)) usb_cdc_notification;
extern ep_t endpoints[];
extern usb_dev_t USB_Dev;
extern uint8_t usbON;
void USB_Init();
void USB_ResetState();
int EP_Init(uint8_t number, uint8_t type, uint16_t txsz, uint16_t rxsz, void (*func)());
void EP_WriteIRQ(uint8_t number, const uint8_t *buf, uint16_t size);
void EP_Write(uint8_t number, const uint8_t *buf, uint16_t size);
int EP_Read(uint8_t number, uint16_t *buf);
usb_LineCoding getLineCoding();
void linecoding_handler(usb_LineCoding *lc);
void clstate_handler(uint16_t val);
void break_handler();
void vendor_handler(config_pack_t *packet);
#endif // __USB_LIB_H__