mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 18:55:13 +03:00
104 lines
3.0 KiB
C
104 lines
3.0 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 "hardware.h"
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#include "proto.h"
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#include "usb.h"
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#include "usb_lib.h"
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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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#define USBBUF 63
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// usb getline
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static char *get_USB(int idx){
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static char tmpbuf[8][USBBUF+1];
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static char *curptr[8] = {tmpbuf[0], tmpbuf[1], tmpbuf[2], tmpbuf[3], tmpbuf[4], tmpbuf[5], tmpbuf[6], tmpbuf[7]};
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static int rest[8] = {USBBUF, USBBUF, USBBUF, USBBUF, USBBUF, USBBUF, USBBUF, USBBUF};
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uint8_t x = USB_receive(idx, (uint8_t*)curptr[idx]);
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if(!x) return NULL;
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curptr[idx][x] = 0;
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if(x == 1 && *curptr[idx] == 0x7f){ // backspace
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if(curptr[idx] > tmpbuf[idx]){
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--curptr[idx];
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USND(idx, "\b \b");
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}
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return NULL;
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}
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USB_sendstr(idx, curptr[idx]); // echo
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if(curptr[idx][x-1] == '\n'){ // || curptr[x-1] == '\r'){
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curptr[idx] = tmpbuf[idx];
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rest[idx] = USBBUF;
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// omit empty lines
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if(tmpbuf[idx][0] == '\n') return NULL;
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// and wrong empty lines
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if(tmpbuf[idx][0] == '\r' && tmpbuf[idx][1] == '\n') return NULL;
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return tmpbuf[idx];
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}
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curptr[idx] += x; rest[idx] -= x;
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if(rest[idx] <= 0){ // buffer overflow
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curptr[idx] = tmpbuf[idx];
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rest[idx] = USBBUF;
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}
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return NULL;
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}
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int main(void){
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uint32_t lastT = 0;
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sysreset();
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StartHSE();
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SysTick_Config(72000);
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hw_setup();
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USBPU_OFF();
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/*if(RCC->CSR & RCC_CSR_IWDGRSTF){ // watchdog reset occured
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SEND("WDGRESET=1"); newline();
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}
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if(RCC->CSR & RCC_CSR_SFTRSTF){ // software reset occured
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SEND("SOFTRESET=1"); newline();
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}*/
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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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USBPU_ON();
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while(1){
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IWDG->KR = IWDG_REFRESH; // refresh watchdog
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if(Tms - lastT > 499){
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LED_blink(LED0);
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lastT = Tms;
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}
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usb_proc();
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for(uint8_t idx = 1; idx < 8; ++idx){
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char *txt = get_USB(idx);
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if(txt){
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IWDG->KR = IWDG_REFRESH;
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cmd_parser(txt);
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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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