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add TSYS01

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eddyem 2017-03-10 22:15:40 +03:00
parent 54a9e365ff
commit c07884c06d
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1
F0-nolib/Readme.md
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@ -6,6 +6,7 @@ This directory contains examples for F0 without any library
- blink - simple LED blink - blink - simple LED blink
- htu21d_nucleo - operaing with HTU-21D in STM32F042-nucleo - htu21d_nucleo - operaing with HTU-21D in STM32F042-nucleo
- morze - for STM32F030, echo data from USART1 on TIM3CH1 (PA6) as Morze code - morze - for STM32F030, echo data from USART1 on TIM3CH1 (PA6) as Morze code
- tsys01_nucleo - read two TSYS01 sensors using STM32F042
- uart - USART over DMA with hardware end-of-string detection - uart - USART over DMA with hardware end-of-string detection
- uart_blink - code for STM32F030F4, echo data on USART1 and blink LEDS on PA4 and PA5 - uart_blink - code for STM32F030F4, echo data on USART1 and blink LEDS on PA4 and PA5
- uart_nucleo - USART over DMA for STM32F042-nucleo - uart_nucleo - USART over DMA for STM32F042-nucleo

137
F0-nolib/tsys01_nucleo/Makefile Normal file
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BINARY = tsys01
BOOTPORT ?= /dev/ttyUSB0
BOOTSPEED ?= 115200
# MCU FAMILY
FAMILY = F0
# MCU code
MCU = F042x6
DEFS += -DEBUG
# change this linking script depending on particular MCU model,
# for example, if you have STM32F103VBT6, you should write:
LDSCRIPT = ld/stm32f042k.ld
INDEPENDENT_HEADERS=
FP_FLAGS ?= -msoft-float
ASM_FLAGS = -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
ARCH_FLAGS = $(ASM_FLAGS) $(FP_FLAGS)
###############################################################################
# Executables
PREFIX ?= /opt/bin/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
OBJDIR = mk
LDSCRIPT ?= $(BINARY).ld
SRC := $(wildcard *.c)
OBJS := $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
STARTUP = $(OBJDIR)/startup.o
OBJS += $(STARTUP)
DEPS := $(OBJS:.o=.d)
INC_DIR ?= ../inc
INCLUDE := -I$(INC_DIR)/F0 -I$(INC_DIR)/cm
LIB_DIR := $(INC_DIR)/ld
###############################################################################
# C flags
CFLAGS += -O2 -g -MD -D__thumb2__=1
CFLAGS += -Wall -Wextra -Wshadow -Wimplicit-function-declaration
CFLAGS += -Wredundant-decls $(INCLUDE)
# -Wmissing-prototypes -Wstrict-prototypes
CFLAGS += -fno-common -ffunction-sections -fdata-sections
###############################################################################
# Linker flags
LDFLAGS += --static -nostartfiles
#--specs=nano.specs
LDFLAGS += -L$(LIB_DIR)
LDFLAGS += -T$(LDSCRIPT)
LDFLAGS += -Wl,-Map=$(OBJDIR)/$(BINARY).map
LDFLAGS += -Wl,--gc-sections
###############################################################################
# Used libraries
LDLIBS += -Wl,--start-group -lc -lgcc -Wl,--end-group
LDLIBS += $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
DEFS += -DSTM32$(FAMILY) -DSTM32$(MCU)
#.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 list
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) $(ARCH_FLAGS) -o $@ -c $<
$(OBJDIR)/%.o: %.c
@echo " CC $<"
$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
#$(OBJDIR)/%.d: %.c $(OBJDIR)
# $(CC) -MM -MG $< | sed -e 's,^\([^:]*\)\.o[ ]*:,$(@D)/\1.o $(@D)/\1.d:,' >$@
$(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) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
clean:
@echo " CLEAN"
$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(OBJDIR)/*.map
@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)
.PHONY: clean flash boot

5
F0-nolib/tsys01_nucleo/Readme Normal file
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@ -0,0 +1,5 @@
Example for STM32F042 nucleo working with TSYS-01 temperature sensor.
Every 5 second check temperature on two sensors with different addresses and show values by USART.
USART speed 115200.

122
F0-nolib/tsys01_nucleo/i2c.c Normal file
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/*
* geany_encoding=koi8-r
* i2c.c
*
* Copyright 2017 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 "stm32f0.h"
#include "i2c.h"
/**
* I2C for TSYS01
* Speed <= 400kHz (200)
* t_SCLH > 21ns
* t_SCLL > 21ns
* while reading, sends NACK
* after reading get 24bits of T value, we need upper 2 bytes: ADC16 = ADC>>8
* T = (-2) * k4 * 10^{-21} * ADC16^4
* + 4 * k3 * 10^{-16} * ADC16^3
* + (-2) * k2 * 10^{-11} * ADC16^2
* + 1 * k1 * 10^{-6} * ADC16
* +(-1.5)* k0 * 10^{-2}
* All coefficiens are in registers:
* k4 - 0xA2, k3 - 0xA4, k2 - 0xA6, k1 - 0xA8, k0 - 0xAA
*/
/*
* Resources: I2C1_SCL - PA9, I2C1_SDA - PA10
* GPIOA->AFR[1] AF4 -- GPIOA->AFR[1] &= ~0xff0, GPIOA->AFR[1] |= 0x440
*/
extern volatile uint32_t Tms;
static uint32_t cntr;
void i2c_setup(){
I2C1->CR1 = 0;
// GPIO
RCC->AHBENR |= RCC_AHBENR_GPIOAEN; // clock
GPIOA->AFR[1] &= ~0xff0; // alternate function F4 for PA9/PA10
GPIOA->AFR[1] |= 0x440;
GPIOA->OTYPER |= GPIO_OTYPER_OT_9 | GPIO_OTYPER_OT_10; // opendrain
GPIOA->MODER &= ~(GPIO_MODER_MODER9 | GPIO_MODER_MODER10);
GPIOA->MODER |= GPIO_MODER_MODER9_AF | GPIO_MODER_MODER10_AF; // alternate function
// I2C
RCC->APB1ENR |= RCC_APB1ENR_I2C1EN; // timing
RCC->CFGR3 |= RCC_CFGR3_I2C1SW; // use sysclock for timing
// Clock = 6MHz, 0.16(6)us, need 5us (*30)
// PRESC=4 (f/5), SCLDEL=0 (t_SU=5/6us), SDADEL=0 (t_HD=5/6us), SCLL,SCLH=14 (2.(3)us)
I2C1->TIMINGR = (4<<28) | (14<<8) | (14); // 0x40000e0e
I2C1->CR1 = I2C_CR1_PE;// | I2C_CR1_RXIE; // Enable I2C & (interrupt on receive - not supported yet)
}
/**
* write command byte to I2C
* @param addr - device address (TSYS01_ADDR0 or TSYS01_ADDR1)
* @param data - byte to write
* @return 0 if error
*/
uint8_t write_i2c(uint8_t addr, uint8_t data){
cntr = Tms;
while(I2C1->ISR & I2C_ISR_BUSY) if(Tms - cntr > 5) return 0; // check busy
cntr = Tms;
while(I2C1->CR2 & I2C_CR2_START) if(Tms - cntr > 5) return 0; // check start
I2C1->CR2 = 1<<16 | addr | I2C_CR2_AUTOEND; // 1 byte, autoend
// now start transfer
I2C1->CR2 |= I2C_CR2_START;
cntr = Tms;
while(!(I2C1->ISR & I2C_ISR_TXIS)){ // ready to transmit
if(I2C1->ISR & I2C_ISR_NACKF){
I2C1->ICR |= I2C_ICR_NACKCF;
return 0;
}
if(Tms - cntr > 5) return 0;
}
I2C1->TXDR = data; // send data
return 1;
}
/**
* read nbytes (2 or 3) of data from I2C line
* @return 1 if all OK, 0 if NACK or no device found
*/
uint8_t read_i2c(uint8_t addr, uint32_t *data, uint8_t nbytes){
uint32_t result = 0;
cntr = Tms;
while(I2C1->ISR & I2C_ISR_BUSY) if(Tms - cntr > 5) return 0; // check busy
cntr = Tms;
while(I2C1->CR2 & I2C_CR2_START) if(Tms - cntr > 5) return 0; // check start
// read N bytes
I2C1->CR2 = (nbytes<<16) | addr | 1 | I2C_CR2_AUTOEND | I2C_CR2_RD_WRN;
I2C1->CR2 |= I2C_CR2_START;
uint8_t i;
cntr = Tms;
for(i = 0; i < nbytes; ++i){
while(!(I2C1->ISR & I2C_ISR_RXNE)){ // wait for data
if(I2C1->ISR & I2C_ISR_NACKF){
I2C1->ICR |= I2C_ICR_NACKCF;
return 0;
}
if(Tms - cntr > 5) return 0;
}
result = (result << 8) | I2C1->RXDR;
}
*data = result;
return 1;
}

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F0-nolib/tsys01_nucleo/i2c.h Normal file
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/*
* geany_encoding=koi8-r
* i2c.h
*
* Copyright 2017 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.
*
*/
// CSB=1, address 1110110
#define TSYS01_ADDR0 (0x76 << 1)
// CSB=0, address 1110111
#define TSYS01_ADDR1 (0x77 << 1)
// registers: reset, read ADC value, start converstion, sart of PROM
#define TSYS01_RESET (0x1E)
#define TSYS01_ADC_READ (0x00)
#define TSYS01_START_CONV (0x48)
#define TSYS01_PROM_ADDR0 (0xA0)
// conversion time = 10ms
#define CONV_TIME (10)
void i2c_setup();
uint8_t read_i2c(uint8_t addr, uint32_t *data, uint8_t nbytes);
uint8_t write_i2c(uint8_t addr, uint8_t data);

12
F0-nolib/tsys01_nucleo/ld/stm32f042k.ld Normal file
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/* Linker script for STM32F042x6, 32K flash, 6K RAM. */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 32K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 6K
}
/* Include the common ld script. */
INCLUDE stm32f0.ld

151
F0-nolib/tsys01_nucleo/main.c Normal file
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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 "stm32f0.h"
#include "usart.h"
#include "i2c.h"
volatile uint32_t Tms = 0;
/* Called when systick fires */
void sys_tick_handler(void){
++Tms;
}
static void gpio_setup(void){
// Set green led (PB3) as output
RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
GPIOB->MODER = GPIO_MODER_MODER3_O;
}
// print 32bit unsigned int
void printu(uint32_t val){
char buf[11], rbuf[10];
int l = 0, bpos = 0;
if(!val){
buf[0] = '0';
l = 1;
}else{
while(val){
rbuf[l++] = val % 10 + '0';
val /= 10;
}
int i;
bpos += l;
for(i = 0; i < l; ++i){
buf[--bpos] = rbuf[i];
}
}
while(ALL_OK != usart2_send_blocking(buf, l+bpos));
}
void showcoeffs(uint8_t addr){ // show norm coefficiens
int i;
const uint8_t regs[5] = {0xAA, 0xA8, 0xA6, 0xA4, 0xA2}; // commands for coefficients
uint32_t K;
for(i = 0; i < 5; ++i){
if(write_i2c(addr, regs[i])){
if(read_i2c(addr, &K, 2)){
char b[3] = {'K', i+'0', '='};
while(ALL_OK != usart2_send_blocking(b, 3));
printu(K);
while(ALL_OK != usart2_send_blocking("\n", 1));
}
}
}
}
int main(void){
uint32_t lastT = 0;
int16_t L = 0;
int _5sec = 0; // five second counter
uint32_t started0=0, started1=0; // time of measurements for given sensor started
uint32_t msctr = 0;
char *txt;
sysreset();
SysTick_Config(6000, 1);
gpio_setup();
usart2_setup();
i2c_setup();
// reset on start
write_i2c(TSYS01_ADDR0, TSYS01_RESET);
write_i2c(TSYS01_ADDR1, TSYS01_RESET);
while (1){
if(lastT > Tms || Tms - lastT > 499){
pin_toggle(GPIOB, 1<<3); // blink by onboard LED once per second
lastT = Tms;
}
if(started0 && Tms - started0 > CONV_TIME){ // poll sensor0
if(write_i2c(TSYS01_ADDR0, TSYS01_ADC_READ)){
uint32_t t;
if(read_i2c(TSYS01_ADDR0, &t, 3)){
while(ALL_OK != usart2_send_blocking("T0=", 3));
printu(t);
while(ALL_OK != usart2_send_blocking("\n", 1));
started0 = 0;
}
}
}
if(started1 && Tms - started1 > CONV_TIME){ // poll sensor1
if(write_i2c(TSYS01_ADDR1, TSYS01_ADC_READ)){
uint32_t t;
if(read_i2c(TSYS01_ADDR1, &t, 3)){
while(ALL_OK != usart2_send_blocking("T1=", 3));
printu(t);
while(ALL_OK != usart2_send_blocking("\n", 1));
started1 = 0;
}
}
}
if(usart2rx()){ // usart1 received data, store in in buffer
L = usart2_getline(&txt);
if(L == 2){
if(txt[0] == 'C'){ // 'C' - show coefficients
showcoeffs(TSYS01_ADDR0);
showcoeffs(TSYS01_ADDR1);
}else if(txt[0] == 'R'){ // 'R' - reset both
write_i2c(TSYS01_ADDR0, TSYS01_RESET);
write_i2c(TSYS01_ADDR1, TSYS01_RESET);
}else if(txt[0] == 'I'){ // 'I' - reinit I2C
i2c_setup();
}
}
}
if(L){ // text waits for sending
if(ALL_OK == usart2_send(txt, L)){
L = 0;
}
}
if(msctr != Tms){
msctr = Tms;
if(++_5sec >= 5000){ // once per 5 second
_5sec = 0;
if(write_i2c(TSYS01_ADDR0, TSYS01_START_CONV)) started0 = Tms;
else started0 = 0;
if(write_i2c(TSYS01_ADDR1, TSYS01_START_CONV)) started1 = Tms;
else started1 = 0;
}
}
}
return 0;
}

BIN
F0-nolib/tsys01_nucleo/tsys01.bin Executable file
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F0-nolib/tsys01_nucleo/usart.c Normal file
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/*us
* usart.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 "stm32f0.h"
#include "usart.h"
#include <string.h>
extern volatile uint32_t Tms;
static int datalen[2] = {0,0}; // received data line length (including '\n')
int linerdy = 0, // received data ready
dlen = 0, // length of data (including '\n') in current buffer
bufovr = 0, // input buffer overfull
txrdy = 1 // transmission done
;
int rbufno = 0; // current rbuf number
static char rbuf[UARTBUFSZ][2], tbuf[UARTBUFSZ]; // receive & transmit buffers
static char *recvdata = NULL;
/**
* return length of received data (without trailing zero
*/
int usart2_getline(char **line){
if(bufovr){
bufovr = 0;
linerdy = 0;
return 0;
}
*line = recvdata;
linerdy = 0;
return dlen;
}
TXstatus usart2_send(const char *str, int len){
if(!txrdy) return LINE_BUSY;
if(len > UARTBUFSZ) return STR_TOO_LONG;
txrdy = 0;
memcpy(tbuf, str, len);
DMA1_Channel4->CCR &= ~DMA_CCR_EN;
DMA1_Channel4->CNDTR = len;
DMA1_Channel4->CCR |= DMA_CCR_EN; // start transmission
return ALL_OK;
}
TXstatus usart2_send_blocking(const char *str, int len){
if(!txrdy) return LINE_BUSY;
int i;
bufovr = 0;
for(i = 0; i < len; ++i){
USART2->TDR = *str++;
while(!(USART2->ISR & USART_ISR_TXE));
}
txrdy = 1;
return ALL_OK;
}
// Nucleo's USART2 connected to VCP proxy of st-link
void usart2_setup(){
// setup pins: PA2 (Tx - AF1), PA15 (Rx - AF1)
RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_DMAEN;
// AF mode (AF1)
GPIOA->MODER = (GPIOA->MODER & ~(GPIO_MODER_MODER2|GPIO_MODER_MODER15))\
| (GPIO_MODER_MODER2_1 | GPIO_MODER_MODER15_1);
GPIOA->AFR[0] = (GPIOA->AFR[0] &~GPIO_AFRH_AFRH2) | 1 << (2 * 4); // PA2
GPIOA->AFR[1] = (GPIOA->AFR[1] &~GPIO_AFRH_AFRH7) | 1 << (7 * 4); // PA15
// DMA: Tx - Ch4
DMA1_Channel4->CPAR = (uint32_t) &USART2->TDR; // periph
DMA1_Channel4->CMAR = (uint32_t) tbuf; // mem
DMA1_Channel4->CCR |= DMA_CCR_MINC | DMA_CCR_DIR | DMA_CCR_TCIE; // 8bit, mem++, mem->per, transcompl irq
// Tx CNDTR set @ each transmission due to data size
NVIC_SetPriority(DMA1_Channel4_5_IRQn, 3);
NVIC_EnableIRQ(DMA1_Channel4_5_IRQn);
NVIC_SetPriority(USART2_IRQn, 0);
// setup usart2
RCC->APB1ENR |= RCC_APB1ENR_USART2EN; // clock
// oversampling by16, 115200bps (fck=48mHz)
//USART2_BRR = 0x1a1; // 48000000 / 115200
USART2->BRR = 480000 / 1152;
USART2->CR3 = USART_CR3_DMAT; // enable DMA Tx
USART2->CR1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_UE; // 1start,8data,nstop; enable Rx,Tx,USART
while(!(USART2->ISR & USART_ISR_TC)); // polling idle frame Transmission
USART2->ICR |= USART_ICR_TCCF; // clear TC flag
USART2->CR1 |= USART_CR1_RXNEIE;
NVIC_EnableIRQ(USART2_IRQn);
}
void dma1_channel4_5_isr(){
if(DMA1->ISR & DMA_ISR_TCIF4){ // Tx
DMA1->IFCR |= DMA_IFCR_CTCIF4; // clear TC flag
txrdy = 1;
}
}
void usart2_isr(){
#ifdef CHECK_TMOUT
static uint32_t tmout = 0;
#endif
if(USART2->ISR & USART_ISR_RXNE){ // RX not emty - receive next char
#ifdef CHECK_TMOUT
if(tmout && Tms >= tmout){ // set overflow flag
bufovr = 1;
datalen[rbufno] = 0;
}
tmout = Tms + TIMEOUT_MS;
if(!tmout) tmout = 1; // prevent 0
#endif
// read RDR clears flag
uint8_t rb = USART2->RDR;
if(datalen[rbufno] < UARTBUFSZ){ // put next char into buf
rbuf[rbufno][datalen[rbufno]++] = rb;
if(rb == '\n'){ // got newline - line ready
linerdy = 1;
dlen = datalen[rbufno];
recvdata = rbuf[rbufno];
// prepare other buffer
rbufno = !rbufno;
datalen[rbufno] = 0;
#ifdef CHECK_TMOUT
// clear timeout at line end
tmout = 0;
#endif
}
}else{ // buffer overrun
bufovr = 1;
datalen[rbufno] = 0;
#ifdef CHECK_TMOUT
tmout = 0;
#endif
}
}
}

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/*
* usart.h
*
* 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.
*/
#pragma once
#ifndef __USART_H__
#define __USART_H__
// input and output buffers size
#define UARTBUFSZ (64)
// timeout between data bytes
#ifndef TIMEOUT_MS
#define TIMEOUT_MS (1500)
#endif
typedef enum{
ALL_OK,
LINE_BUSY,
STR_TOO_LONG
} TXstatus;
#define usart2rx() (linerdy)
#define usart2ovr() (bufovr)
extern int linerdy, bufovr, txrdy;
void usart2_setup();
int usart2_getline(char **line);
TXstatus usart2_send(const char *str, int len);
TXstatus usart2_send_blocking(const char *str, int len);
#endif // __USART_H__