mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 18:55:13 +03:00
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
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* main.c
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*
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* Copyright 2017 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 "adc.h"
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#include "hardware.h"
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#include "i2c.h"
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#include "proto.h"
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#include "spi.h"
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#include "usart.h"
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#include "usb.h"
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#include "usb_lib.h"
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// ADC value threshold for meaning it is new
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#define ADCthreshold (20)
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volatile uint32_t Tms = 0;
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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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volatile uint8_t ADCmon = 0; // ==1 to monitor ADC (change PWM of LEDS & show current value)
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uint16_t oldADCval = 0;
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int main(void){
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uint32_t lastT = 0;
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sysreset();
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SysTick_Config(6000, 1);
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hw_setup();
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RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
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USB_setup();
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iwdg_setup();
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while (1){
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IWDG->KR = IWDG_REFRESH; // refresh watchdog
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if(lastT > Tms || Tms - lastT > 499){
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if(ADCmon){
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uint16_t v = getADCval(0);
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int32_t d = v - oldADCval;
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if(d < -ADCthreshold || d > ADCthreshold){
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oldADCval = v;
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printADCvals();
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v >>= 2; // 10 bits
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TIM3->CCR1 = TIM3->CCR2 = TIM3->CCR3 = 0xff; TIM3->CCR4 = 0;
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if(v >= 0x300) TIM3->CCR4 = v - 0x300;
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else if(v >= 0x200) TIM3->CCR3 = v - 0x200;
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else if(v >= 0x100){ TIM3->CCR2 = v - 0x100; TIM3->CCR3 = 0; }
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else{ TIM3->CCR1 = v; TIM3->CCR2 = TIM3->CCR3 = 0; }
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}
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}
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lastT = Tms;
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transmit_tbuf(); // non-blocking transmission of data from UART buffer every 0.5s
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}
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if(I2C_scan_mode){
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uint8_t addr;
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int ok = i2c_scan_next_addr(&addr);
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if(addr == I2C_ADDREND) USND("Scan ends\n");
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else if(ok){
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USB_sendstr(uhex2str(addr));
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USND(" ("); USB_sendstr(u2str(addr));
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USND(") - found device\n");
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}
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}
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usb_proc();
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char *txt;
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if((txt = get_USB())){
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const char *ans = parse_cmd(txt);
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if(ans){
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uint16_t l = 0; const char *p = ans;
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while(*p++) l++;
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USB_send((uint8_t*)ans, l);
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if(ans[l-1] != '\n') USND("\n");
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}
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}
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for(int n = 1; n <= USARTNUM; ++n){
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if(usartrx(n)){ // usart1 received data, store in in buffer
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int r = usart_getline(n, &txt);
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if(r){
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txt[r] = 0;
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USND("Got string over USART"); USB_sendstr(u2str(n));
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USND(":\n"); USB_sendstr(txt);
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}
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}
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}
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}
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return 0;
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}
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