mirror of
https://github.com/eddyem/stm32samples.git
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105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*
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* This file is part of the pl2303 project.
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* Copyright 2022 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 "hardware.h"
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#include "proto.h"
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#include "usart.h"
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#include "usb.h"
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#define USBBUFSZ 127
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const char *test = "123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789S123456789T123456789U123456789V123456789W123456789X123456789Y\n"
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"123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789S123456789T123456789U123456789V123456789W123456789X123456789Y\n";
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volatile uint32_t Tms = 0;
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void sys_tick_handler(void){
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++Tms;
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}
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// usb getline
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char *get_USB(){
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static char tmpbuf[USBBUFSZ+1], *curptr = tmpbuf;
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static int rest = USBBUFSZ;
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uint8_t x = USB_receive(curptr);
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if(!x) return NULL;
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curptr[x] = 0;
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if(curptr[x-1] == '\n'){
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curptr = tmpbuf;
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rest = USBBUFSZ;
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return tmpbuf;
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}
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curptr += x; rest -= x;
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if(rest <= 0){ // buffer overflow
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curptr = tmpbuf;
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rest = USBBUFSZ;
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USB_send("USB buffer overflow\n");
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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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int hse = 0;
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if(StartHSE()){
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hse = 1;
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SysTick_Config((uint32_t)72000); // 1ms
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}else{
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StartHSI();
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SysTick_Config((uint32_t)48000); // 1ms
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}
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hw_setup();
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usart_setup();
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USB_setup();
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if(hse) usart_send("Ready @ HSE");
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else usart_send("Ready @ HSI");
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usart_send(", CFGR="); usart_send(u2hexstr(RCC->CFGR));
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usart_send(", CR="); usart_send(u2hexstr(RCC->CR));
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usart_send(", SysFreq="); usart_send(u2str(SysFreq)); usart_putchar('\n');
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uint32_t ctr = Tms;
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while(1){
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if(Tms - ctr > 499){
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ctr = Tms;
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pin_toggle(GPIOB, 1 << 1 | 1 << 0); // toggle LED @ PB0
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}
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if(bufovr){
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bufovr = 0;
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usart_send("bufovr\n");
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}
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char *txt = NULL;
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if(usart_getline(&txt)){
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const char *ans = parse_cmd(txt);
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if(ans) usart_send(ans);
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}
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usb_proc();
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if((txt = get_USB())){
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usart_send("Get by USB: ");
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usart_send(txt); usart_putchar('\n');
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const char *ans = parse_cmd(txt);
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if(ans) USB_send(ans);
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}
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if(Tlast){
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usart_send("Tlast="); usart_send(u2str(Tlast)); usart_putchar('\n');
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Tlast = 0;
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}
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if(starttest){
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--starttest;
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USB_send(test);
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}
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}
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}
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