mirror of
https://github.com/eddyem/stm32samples.git
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112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*
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* main.c
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*
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* Copyright 2018 Edward V. Emelianoff <eddy@sao.ru, edward.emelianoff@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <string.h> // memcpy
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#include "stm32f0.h"
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#include "hardware.h"
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#include "usart.h"
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#include "adc.h"
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#include "protocol.h"
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#include "mainloop.h"
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volatile uint32_t Tms = 0;
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volatile uint16_t flow_rate = 0; // flow sensor rate
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volatile uint16_t flow_cntr = 0; // flow sensor trigger counter
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// this variable is global as user need to clear it in protocol.c
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uint8_t crit_error = 0; // got critical error, need user acknowledgement
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// Called when systick fires
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void sys_tick_handler(void){
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++Tms;
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}
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static void print_state(uint8_t state){
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if(state == ST_OK){
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put_string("OK\n");
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return;
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}
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if(state & ST_CRITICAL) put_string("CRIT"); // add prefix "CRIT" for critical states
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if(!(state & ST_OK)){ // something changed
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if(state & ST_OFF) put_string("OFF");
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else{
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if(state & ST_FASTER) put_string("FASTER");
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else put_string("SLOWER");
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}
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}
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put_char('\n');
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}
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int main(void){
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uint32_t lastTflow = 0; // last flow measurement time
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chiller_state ost = {ST_OK, ST_OK, ST_OK, ST_OK}, *st; // old & current chiller states
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char *txt;
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hw_setup();
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SysTick_Config(6000, 1);
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SEND_BLK("Chiller controller v0.1\n");
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if(RCC->CSR & RCC_CSR_IWDGRSTF){ // watchdog reset occured
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SEND_BLK("WDGRESET=1");
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}
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if(RCC->CSR & RCC_CSR_SFTRSTF){ // software reset occured
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SEND_BLK("SOFTRESET=1");
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}
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RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
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while (1){
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IWDG->KR = IWDG_REFRESH;
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if(Tms - lastTflow > FLOW_RATE_MS){ // onse per one second check flow sensor counter
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lastTflow = Tms;
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flow_rate = flow_cntr;
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flow_cntr = 0;
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if(crit_error) SEND("CRITICAL=1\n");
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}
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if(usart1_getline(&txt)){ // usart1 received command, process it
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txt = process_command(txt);
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}else txt = NULL;
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if(txt){ // text waits for sending
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while(ALL_OK != usart1_send(txt, 0)){
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IWDG->KR = IWDG_REFRESH;
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}
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}
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IWDG->KR = IWDG_REFRESH;
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//usart1_sendbuf();
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st = mainloop();
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// process state values
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if(st->common_state != ST_OK){
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if(st->common_state & ST_CRITICAL) crit_error = 1;
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put_string("STATE=");
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print_state(st->common_state);
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}
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// other states
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if(st->pump_state != ST_OK){
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put_string("PUMP=");
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print_state(st->pump_state);
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}
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if(st->cooler_state != ST_OK){
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put_string("COOLER=");
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print_state(st->cooler_state);
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}
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if(st->heater_state != ST_OK){
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put_string("HEATER=");
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print_state(st->heater_state);
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}
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memcpy(&ost, st, sizeof(chiller_state));
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usart1_sendbuf();
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}
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}
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