mirror of
https://github.com/eddyem/stm32samples.git
synced 2026-08-12 09:39:25 +03:00
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/*
|
|
* This file is part of the blink project.
|
|
* Copyright 2023 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 <stm32g4.h>
|
|
#include <string.h>
|
|
|
|
#include "hardware.h"
|
|
#include "usart.h"
|
|
|
|
// 40ms for debouncing
|
|
#define TDEBOUNCE (40)
|
|
|
|
int main(void){
|
|
StartHSE();
|
|
gpio_setup();
|
|
usart_setup(115200);
|
|
bool pressed = false;
|
|
uint32_t Tblink = 0, Tkey = 0; // blink and key pressed time
|
|
while(1){
|
|
USART_flags_t f = usart_process();
|
|
if(f.rxovrfl) usart_sendstr("Rx buffer overflow!\n");
|
|
if(f.txerr) usart_sendstr("Tx error!\n");
|
|
if(f.gotstring){
|
|
char *str = usart_getline();
|
|
if(str){
|
|
usart_sendstr("Received:\n");
|
|
usart_sendstr(str);
|
|
int l = strlen(str);
|
|
if(str[l-1] != '\n'){
|
|
usart_sendstr("\n(only part of line)\n");
|
|
}
|
|
}
|
|
}
|
|
if(Tms - Tblink > 499){
|
|
LED_TOGG();
|
|
Tblink = Tms;
|
|
}
|
|
if(KEY_PRESSED()){
|
|
if(!pressed){ // new event
|
|
pressed = true;
|
|
usart_sendstr("Key pressed\n");
|
|
}
|
|
Tkey = Tms;
|
|
}else{ // key released
|
|
if(pressed && (Tms - Tkey) > TDEBOUNCE){ // wait for debounce
|
|
pressed = false;
|
|
usart_sendstr("Key released\n");
|
|
}
|
|
}
|
|
}
|
|
}
|