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Add keyboard snippet

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This commit is contained in:
eddyem 2015-08-31 17:45:18 +03:00
parent 832658cc13
commit 43785dd1f3
19 changed files with 1056 additions and 0 deletions
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133
keyboard_snippet/Makefile Normal file
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BINARY = keyboard
BOOTPORT ?= /dev/ttyUSB0
BOOTSPEED ?= 115200
# change this linking script depending on particular MCU model,
# for example, if you have STM32F103VBT6, you should write:
LDSCRIPT = ld/stm32f103x8.ld
LIBNAME = opencm3_stm32f1
DEFS = -DSTM32F1 -DKBD_3BY4 -DEBUG
OBJDIR = mk
INDEPENDENT_HEADERS=
FP_FLAGS ?= -msoft-float
ARCH_FLAGS = -mthumb -mcpu=cortex-m3 $(FP_FLAGS) -mfix-cortex-m3-ldrd
###############################################################################
# Executables
PREFIX ?= arm-none-eabi
RM := rm -f
RMDIR := rmdir
CC := $(PREFIX)-gcc
LD := $(PREFIX)-gcc
AR := $(PREFIX)-ar
AS := $(PREFIX)-as
OBJCOPY := $(PREFIX)-objcopy
OBJDUMP := $(PREFIX)-objdump
GDB := $(PREFIX)-gdb
STFLASH = $(shell which st-flash)
STBOOT = $(shell which stm32flash)
###############################################################################
# Source files
LDSCRIPT ?= $(BINARY).ld
SRC = $(wildcard *.c)
OBJS = $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
ifeq ($(strip $(OPENCM3_DIR)),)
OPENCM3_DIR := /usr/local/arm-none-eabi
$(info Using $(OPENCM3_DIR) path to library)
endif
INCLUDE_DIR = $(OPENCM3_DIR)/include
LIB_DIR = $(OPENCM3_DIR)/lib
SCRIPT_DIR = $(OPENCM3_DIR)/scripts
###############################################################################
# C flags
CFLAGS += -Os -g
CFLAGS += -Wall -Wextra -Wshadow -Wimplicit-function-declaration
CFLAGS += -Wredundant-decls
# -Wmissing-prototypes -Wstrict-prototypes
CFLAGS += -fno-common -ffunction-sections -fdata-sections
###############################################################################
# C & C++ preprocessor common flags
CPPFLAGS += -MD
CPPFLAGS += -Wall -Werror
CPPFLAGS += -I$(INCLUDE_DIR) $(DEFS)
###############################################################################
# Linker flags
LDFLAGS += --static -nostartfiles
LDFLAGS += -L$(LIB_DIR)
LDFLAGS += -T$(LDSCRIPT)
LDFLAGS += -Wl,-Map=$(*).map
LDFLAGS += -Wl,--gc-sections
###############################################################################
# Used libraries
LDLIBS += -l$(LIBNAME)
LDLIBS += -Wl,--start-group -lc -lgcc -Wl,--end-group
.SUFFIXES: .elf .bin .hex .srec .list .map .images
.SECONDEXPANSION:
.SECONDARY:
ELF := $(OBJDIR)/$(BINARY).elf
LIST := $(OBJDIR)/$(BINARY).list
BIN := $(BINARY).bin
HEX := $(BINARY).hex
all: bin
elf: $(ELF)
bin: $(BIN)
hex: $(HEX)
list: $(LIST)
$(OBJDIR):
mkdir $(OBJDIR)
$(OBJDIR)/%.o: %.c
@printf " CC $<\n"
$(CC) $(CFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $@ -c $<
$(SRC) : %.c : %.h $(INDEPENDENT_HEADERS)
@touch $@
%.h: ;
$(BIN): $(ELF)
@printf " OBJCOPY $(BIN)\n"
$(OBJCOPY) -Obinary $(ELF) $(BIN)
$(HEX): $(ELF)
@printf " OBJCOPY $(HEX)\n"
$(OBJCOPY) -Oihex $(ELF) $(HEX)
$(LIST): $(ELF)
@printf " OBJDUMP $(LIST)\n"
$(OBJDUMP) -S $(ELF) > $(LIST)
$(ELF): $(OBJDIR) $(OBJS) $(LDSCRIPT) $(LIB_DIR)/lib$(LIBNAME).a
@printf " LD $(ELF)\n"
$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
clean:
@printf " CLEAN\n"
$(RM) $(OBJS) $(OBJDIR)/*.d $(ELF) $(HEX) $(LIST) $(OBJDIR)/*.map
$(RMDIR) $(OBJDIR)
flash: $(BIN)
@printf " FLASH $(BIN)\n"
$(STFLASH) write $(BIN) 0x8000000
boot: $(BIN)
@printf " LOAD $(BIN) through bootloader\n"
$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
.PHONY: clean elf hex list flash boot
#-include $(OBJS:.o=.d)

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### USB HID keyboard snippet
This snippet allows to emulate USB keyboard to send different messages as they where typed on simple keyboard
(usefull for multiplatform usage without any drivers setup)

BIN
keyboard_snippet/keyboard.bin Executable file
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Binary file not shown.

74
keyboard_snippet/keycodes.c Normal file
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/*
* keycodes.c
*
* Copyright 2015 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 "keycodes.h"
/*
* Keyboard buffer:
* buf[0]: MOD
* buf[1]: reserved
* buf[2]..buf[7] - keycodes 1..6
*/
static uint8_t buf[8] = {0,0,0,0,0,0,0,0};
#define _(x) (x|0x80)
// array for keycodes according to ASCII table; MSB is MOD_SHIFT flag
static const uint8_t keycodes[] = {
// space !"#$%&'
KEY_SPACE, _(KEY_1), _(KEY_QUOTE), _(KEY_3), _(KEY_4), _(KEY_5), _(KEY_7), KEY_QUOTE,
// ()*+,-./
_(KEY_9), _(KEY_0), _(KEY_8), _(KEY_EQUAL), KEY_COMMA, KEY_MINUS, KEY_PERIOD, KEY_SLASH,
// 0..9
39, 30, 31, 32, 33, 34, 35, 36, 37, 38,
// :;<=>?@
_(KEY_SEMICOLON), KEY_SEMICOLON, _(KEY_COMMA), KEY_EQUAL, _(KEY_PERIOD), _(KEY_SLASH), _(KEY_2),
// A..Z: for a in $(seq 0 25); do printf "$((a+132)),"; done
132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,
// [\]^_`
KEY_LEFT_BRACE, KEY_BACKSLASH, KEY_RIGHT_BRACE, _(KEY_6), _(KEY_MINUS), KEY_TILDE,
// a..z: for a in $(seq 0 25); do printf "$((a+4)),"; done
4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,
// {|}~
_(KEY_LEFT_BRACE), _(KEY_BACKSLASH), _(KEY_RIGHT_BRACE), _(KEY_TILDE)
};
uint8_t *set_key_buf(uint8_t MOD, uint8_t KEY){
buf[0] = MOD;
buf[2] = KEY;
return buf;
}
/**
* return buffer for sending symbol "ltr" with addition modificator mod
*/
uint8_t *press_key_mod(char ltr, uint8_t mod){
uint8_t MOD = 0;
uint8_t KEY = 0;
if(ltr > 31){
KEY = keycodes[ltr - 32];
if(KEY & 0x80){
MOD = MOD_SHIFT;
KEY &= 0x7f;
}
}else if (ltr == '\n') KEY = KEY_ENTER;
buf[0] = MOD | mod;
buf[2] = KEY;
return buf;
}

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/*
* keycodes.h
*
* Copyright 2015 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 __KEYKODES_H__
#define __KEYKODES_H__
#include <stdint.h>
uint8_t *set_key_buf(uint8_t MOD, uint8_t KEY);
#define release_key() set_key_buf(0,0)
uint8_t *press_key_mod(char key, uint8_t mod);
#define press_key(k) press_key_mod(k, 0)
#define MOD_CTRL 0x01
#define MOD_SHIFT 0x02
#define MOD_ALT 0x04
#define MOD_GUI 0x08
#define LEFT(mod) (mod)
#define RIGHT(mod) ((mod << 4))
#define KEY_A 4
#define KEY_B 5
#define KEY_C 6
#define KEY_D 7
#define KEY_E 8
#define KEY_F 9
#define KEY_G 10
#define KEY_H 11
#define KEY_I 12
#define KEY_J 13
#define KEY_K 14
#define KEY_L 15
#define KEY_M 16
#define KEY_N 17
#define KEY_O 18
#define KEY_P 19
#define KEY_Q 20
#define KEY_R 21
#define KEY_S 22
#define KEY_T 23
#define KEY_U 24
#define KEY_V 25
#define KEY_W 26
#define KEY_X 27
#define KEY_Y 28
#define KEY_Z 29
#define KEY_1 30
#define KEY_2 31
#define KEY_3 32
#define KEY_4 33
#define KEY_5 34
#define KEY_6 35
#define KEY_7 36
#define KEY_8 37
#define KEY_9 38
#define KEY_0 39
#define KEY_ENTER 40
#define KEY_ESC 41
#define KEY_BACKSPACE 42
#define KEY_TAB 43
#define KEY_SPACE 44
#define KEY_MINUS 45
#define KEY_EQUAL 46
#define KEY_LEFT_BRACE 47
#define KEY_RIGHT_BRACE 48
#define KEY_BACKSLASH 49
#define KEY_NUMBER 50
#define KEY_SEMICOLON 51
#define KEY_QUOTE 52
#define KEY_TILDE 53
#define KEY_COMMA 54
#define KEY_PERIOD 55
#define KEY_SLASH 56
#define KEY_CAPS_LOCK 57
#define KEY_F1 58
#define KEY_F2 59
#define KEY_F3 60
#define KEY_F4 61
#define KEY_F5 62
#define KEY_F6 63
#define KEY_F7 64
#define KEY_F8 65
#define KEY_F9 66
#define KEY_F10 67
#define KEY_F11 68
#define KEY_F12 69
#define KEY_PRINTSCREEN 70
#define KEY_SCROLL_LOCK 71
#define KEY_PAUSE 72
#define KEY_INSERT 73
#define KEY_HOME 74
#define KEY_PAGE_UP 75
#define KEY_DELETE 76
#define KEY_END 77
#define KEY_PAGE_DOWN 78
#define KEY_RIGHT 79
#define KEY_LEFT 80
#define KEY_DOWN 81
#define KEY_UP 82
#define KEY_NUM_LOCK 83
#define KEYPAD_SLASH 84
#define KEYPAD_ASTERIX 85
#define KEYPAD_MINUS 86
#define KEYPAD_PLUS 87
#define KEYPAD_ENTER 88
#define KEYPAD_1 89
#define KEYPAD_2 90
#define KEYPAD_3 91
#define KEYPAD_4 92
#define KEYPAD_5 93
#define KEYPAD_6 94
#define KEYPAD_7 95
#define KEYPAD_8 96
#define KEYPAD_9 97
#define KEYPAD_0 98
#define KEYPAD_PERIOD 99
#endif // __KEYKODES_H__

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stm32f103?4* stm32f1 ROM=16K RAM=6K
stm32f103?6* stm32f1 ROM=32K RAM=10K
stm32f103?8* stm32f1 ROM=64K RAM=20K
stm32f103?b* stm32f1 ROM=128K RAM=20K
stm32f103?c* stm32f1 ROM=256K RAM=48K
stm32f103?d* stm32f1 ROM=384K RAM=64K
stm32f103?e* stm32f1 ROM=512K RAM=64K
stm32f103?f* stm32f1 ROM=768K RAM=96K
stm32f103?g* stm32f1 ROM=1024K RAM=96K

31
keyboard_snippet/ld/stm32f103x4.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 16K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 6K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
keyboard_snippet/ld/stm32f103x6.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 32K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 10K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

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keyboard_snippet/ld/stm32f103x8.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 64K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
keyboard_snippet/ld/stm32f103xB.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
keyboard_snippet/ld/stm32f103xC.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 256K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 48K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
keyboard_snippet/ld/stm32f103xD.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 384K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 512K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
keyboard_snippet/ld/stm32f103xF.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 768K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 96K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

31
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for STM32F100x4, 16K flash, 4K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 1024K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 96K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f1.ld

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/*
* main.c
*
* Copyright 2015 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 "ocm.h"
#include "usbkeybrd.h"
volatile uint32_t Timer = 0; // global timer (milliseconds)
/*
* SysTick used for system timer with period of 1ms
*/
void SysTick_init(){
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8); // Systyck: 72/8=9MHz
systick_set_reload(8999); // 9000 pulses: 1kHz
systick_interrupt_enable();
systick_counter_enable();
}
int main(void){
uint32_t oldT = 0;
rcc_clock_setup_in_hsi_out_48mhz();
SysTick_init();
/*
// if PC11 connected to usb 1.5kOhm pull-up through transistor
rcc_periph_clock_enable(RCC_GPIOC);
gpio_set(GPIOC, GPIO11);
gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
*/
usbkeybrd_setup();
/*
int i;
for (i = 0; i < 0x80000; i++)
__asm__("nop");
gpio_clear(GPIOC, GPIO11);
*/
uint32_t seconds_ctr = 0;
while (1){
poll_usbkeybrd();
if(Timer - oldT > 999 || oldT > Timer){
print_int(seconds_ctr++);
newline();
oldT = Timer;
}
}
}
/**
* SysTick interrupt: increment global time & send data buffer through USB
*/
void sys_tick_handler(){
Timer++;
process_usbkbrd();
}

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/*
* ocm.h
*
* Copyright 2015 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 __OCM_H__
#define __OCM_H__
#include <stdlib.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/usb/usbd.h>
#include <libopencm3/usb/hid.h>
#include <libopencm3/cm3/nvic.h>
#endif // __OCM_H__

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/*
* usbkeybrd.c
*
* Copyright 2015 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 "usbkeybrd.h"
#include "keycodes.h"
#define BUFLEN 512
static char sendbuf[BUFLEN];
static char *msg_start = sendbuf, *msg_end = sendbuf;
static const char *buf_end = sendbuf+BUFLEN;
usbd_device *usbd_dev;
const struct usb_device_descriptor dev = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = 64,
// 0x03EB 0x2042 - Atmel Keyboard Demo Application
.idVendor = 0x03EB,
.idProduct = 0x2042,
.bcdDevice = 0x0200,
.iManufacturer = 1,
.iProduct = 2,
.iSerialNumber = 3,
.bNumConfigurations = 1,
};
static const uint8_t hid_report_descriptor[] = {
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x06, /* Usage (Keyboard) */
0xA1, 0x01, /* Collection (Application) */
// 0x85, 0x02, /* Report ID */
0x05, 0x07, /* Usage (Key codes) */
0x19, 0xE0, /* Usage Minimum (224) */
0x29, 0xE7, /* Usage Maximum (231) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0x01, /* Logical Maximum (1) */
0x75, 0x01, /* Report Size (1) */
0x95, 0x08, /* Report Count (8) */
0x81, 0x02, /* Input (Data, Variable, Absolute) */
0x95, 0x01, /* Report Count (1) */
0x75, 0x08, /* Report Size (8) */
0x81, 0x01, /* Input (Constant) ;5 bit padding */
0x95, 0x05, /* Report Count (5) */
0x75, 0x01, /* Report Size (1) */
0x05, 0x08, /* Usage Page (Page# for LEDs) */
0x19, 0x01, /* Usage Minimum (01) */
0x29, 0x05, /* Usage Maximum (05) */
0x91, 0x02, /* Output (Data, Variable, Absolute) */
0x95, 0x01, /* Report Count (1) */
0x75, 0x03, /* Report Size (3) */
0x91, 0x01, /* Output (Constant) */
0x95, 0x06, /* Report Count (1) */
0x75, 0x08, /* Report Size (3) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0x65, /* Logical Maximum (101) */
0x05, 0x07, /* Usage (Key codes) */
0x19, 0x00, /* Usage Minimum (00) */
0x29, 0x65, /* Usage Maximum (101) */
0x81, 0x00, /* Input (Data, Array) */
0x09, 0x05, /* Usage (Vendor Defined) */
0x15, 0x00, /* Logical Minimum (0)) */
0x26, 0xFF, 0x00, /* Logical Maximum (255)) */
0x75, 0x08, /* Report Count (2)) */
0x95, 0x02, /* Report Size (8 bit)) */
0xB1, 0x02, /* Feature (Data, Variable, Absolute) */
0xC0 /* End Collection,End Collection */
};
static const struct {
struct usb_hid_descriptor hid_descriptor;
struct {
uint8_t bReportDescriptorType;
uint16_t wDescriptorLength;
} __attribute__((packed)) hid_report;
} __attribute__((packed)) hid_function = {
.hid_descriptor = {
.bLength = sizeof(hid_function),
.bDescriptorType = USB_DT_HID,
.bcdHID = 0x0100,
.bCountryCode = 0,
.bNumDescriptors = 1,
},
.hid_report = {
.bReportDescriptorType = USB_DT_REPORT,
.wDescriptorLength = sizeof(hid_report_descriptor),
},
};
const struct usb_endpoint_descriptor hid_endpoint = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 0x81,
.bmAttributes = USB_ENDPOINT_ATTR_INTERRUPT,
.wMaxPacketSize = 8,
.bInterval = 0x10,
};
const struct usb_interface_descriptor hid_iface = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 1, // boot
.bInterfaceProtocol = 1, // keyboard
.iInterface = 0,
.endpoint = &hid_endpoint,
.extra = &hid_function,
.extralen = sizeof(hid_function),
};
const struct usb_interface ifaces[] = {{
.num_altsetting = 1,
.altsetting = &hid_iface,
}};
const struct usb_config_descriptor config = {
.bLength = USB_DT_CONFIGURATION_SIZE,
.bDescriptorType = USB_DT_CONFIGURATION,
.wTotalLength = 0,
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = 0xC0,
.bMaxPower = 0x32,
.interface = ifaces,
};
static const char *usb_strings[] = {
"Simple matrix keyboard 3x4",
"EEV",
"v01",
};
/* Buffer to be used for control requests. */
uint8_t usbd_control_buffer[128];
static int hid_control_request(usbd_device *usbddev, struct usb_setup_data *req, uint8_t **buf, uint16_t *len,
void (**complete)(usbd_device *usbddev, struct usb_setup_data *req)){
(void)complete;
(void)usbddev;
if ((req->bmRequestType != 0x81) ||
(req->bRequest != USB_REQ_GET_DESCRIPTOR) ||
(req->wValue != 0x2200))
return 0;
*buf = (uint8_t *)hid_report_descriptor;
*len = sizeof(hid_report_descriptor);
return 1;
}
void hid_set_config(usbd_device *usbddev, uint16_t wValue){
(void)wValue;
(void)usbddev;
usbd_ep_setup(usbd_dev, 0x81, USB_ENDPOINT_ATTR_INTERRUPT, 4, NULL);
usbd_register_control_callback(
usbddev,
USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_INTERFACE,
USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
hid_control_request);
}
void usbkeybrd_setup(){
usbd_dev = usbd_init(&stm32f103_usb_driver, &dev, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
usbd_register_set_config_callback(usbd_dev, hid_set_config);
}
#define put_char_to_buf(ch) do{*(msg_end++) = ch; if(msg_end == buf_end) msg_end = sendbuf;}while(0)
/**
* put data into keyboard buffer
* THERE's NO DATA CORRUPTION CONTROL HERE!!!
*/
void send_msg(char *msg){
while(*msg){
put_char_to_buf(*(msg++));
}
}
void newline(){
put_char_to_buf('\n');
}
/**
* send data from keyboard buffer
*/
void process_usbkbrd(){
static uint8_t pressed = 0;
if(pressed){ // the keyboard was "pressed"
if(8 == usbd_ep_write_packet(usbd_dev, 0x81, release_key(), 8))
pressed = 0;
}else if(msg_start != msg_end){ // we need to send keypress event
if(8 == usbd_ep_write_packet(usbd_dev, 0x81, press_key(*msg_start), 8)){
if(++msg_start == buf_end)
msg_start = sendbuf;
pressed = 1;
}
}else return;
}
/**
* Print buff as hex values
* @param buf - buffer to print
* @param l - buf length
* @param s - function to send a byte
*/
void print_hex(uint8_t *buff, uint8_t l){
inline void putc(char c){
if(c < 10)
put_char_to_buf(c + '0');
else
put_char_to_buf(c + 'a' - 10);
}
put_char_to_buf('0');
put_char_to_buf('x');
while(l--){
putc(buff[l] >> 4);
putc(buff[l] & 0x0f);
}
}
/**
* Print decimal integer value
* @param N - value to print
* @param s - function to send a byte
*/
void print_int(int32_t N){
char buf[10];
int32_t L = 0;
if(N < 0){
put_char_to_buf('-');
N = -N;
}
if(N){
while(N){
buf[L++] = N % 10 + '0';
N /= 10;
}
while(L--) put_char_to_buf(buf[L]);
}else put_char_to_buf('0');
}

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/*
* usbkeybrd.h
*
* Copyright 2015 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 __USBKEYBRD_H__
#define __USBKEYBRD_H__
#include "ocm.h"
extern usbd_device *usbd_dev;
void process_usbkbrd();
void send_msg(char *msg);
#define P(x) send_msg(x)
void usbkeybrd_setup();
void print_hex(uint8_t *buff, uint8_t l);
void print_int(int32_t N);
void newline();
#define poll_usbkeybrd() usbd_poll(usbd_dev)
#endif // __USBKEYBRD_H__