mirror of
https://github.com/eddyem/stm32samples.git
synced 2026-03-20 00:30:57 +03:00
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* This file is part of the blink project.
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* Copyright 2023 Edward V. Emelianov <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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "stm32g0.h"
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#include "hardware.h"
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#include "usart.h"
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#include "dbg.h"
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#include "usb_dev.h"
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#define INBUFSZ (256)
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volatile uint32_t Tms = 0; // milliseconds
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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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/*
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* Set up timer to fire every x milliseconds
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*/
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static void systick_setup(uint32_t xms){ // xms < 2098!!!
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Tms = 0;
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static uint32_t curms = 0;
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if(curms == xms) return;
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// this function also clears counter so it starts right away
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SysTick_Config(SysFreq / 8000 * xms); // arg should be < 0xffffff, so ms should be < 2098
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curms = xms;
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}
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#ifdef EBUG
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volatile uint32_t uictr = 0, CTRctr = 0;
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static uint32_t olduictr = 0, oldctrctr = 0;
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#endif
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int main(void){
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char inbuff[INBUFSZ];
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StartHSE();
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gpio_setup();
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systick_setup(1); // run each 1ms
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usart_setup(3000000);
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USB_setup();
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uint32_t M = 0;
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uint8_t ispressed = 0;
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const char *pressed = "Key pressed\n", *released = "Key released\n";
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while(1){
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if(Tms - M > 499){
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LED_TOGGLE();
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M = Tms;
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#ifdef EBUG
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if(olduictr != uictr){
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usart_sendstr("USBirqctr="); usart_sendstr(u2str(uictr));
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usart_send("\n", 1);
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olduictr = uictr;
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}
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if(CTRctr != oldctrctr){
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usart_sendstr("CTRctr="); usart_sendstr(u2str(CTRctr));
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usart_send("\n", 1);
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oldctrctr = CTRctr;
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}
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#endif
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}
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if(KEY_PRESSED()){ // key pressed - send to all "Pressed"
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if(!ispressed){
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ispressed = 1;
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USB_sendstr(pressed);
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usart_sendstr(pressed);
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}
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}else{ // released -> send
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if(ispressed){
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ispressed = 0;
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USB_sendstr(released);
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usart_sendstr(released);
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}
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}
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USART_flags_t f = usart_process();
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if(f.rxovrfl) usart_sendstr("Rx overflow!\n");
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if(f.txerr) usart_sendstr("Tx error!\n");
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char *got = usart_getline();
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if(got){
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usart_sendstr("You sent:\n");
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usart_sendstr(got);
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usart_send("\n", 1);
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}
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int l = USB_receivestr(inbuff, INBUFSZ);
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if(l < 0) usart_sendstr("ERROR: USB buffer overflow or string was too long\n");
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else if(l){
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usart_sendstr("USB:\n");
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usart_sendstr(inbuff);
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usart_send("\n", 1);
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USB_sendstr(inbuff);
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newline();
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//const char *ans = parse_cmd(inbuff);
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//if(ans) USB_sendstr(ans);
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}
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}
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}
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