mirror of
https://github.com/eddyem/stm32samples.git
synced 2026-02-28 11:54:30 +03:00
start fixed F1 testboard for new board type
This commit is contained in:
Edward Emelianov
221
F1:F103/F1_testbrd_deprecated/main.c
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221
F1:F103/F1_testbrd_deprecated/main.c
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/*
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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 "usart.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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void iwdg_setup(){
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uint32_t tmout = 16000000;
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/* Enable the peripheral clock RTC */
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/* (1) Enable the LSI (40kHz) */
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/* (2) Wait while it is not ready */
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RCC->CSR |= RCC_CSR_LSION; /* (1) */
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while((RCC->CSR & RCC_CSR_LSIRDY) != RCC_CSR_LSIRDY){if(--tmout == 0) break;} /* (2) */
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/* Configure IWDG */
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/* (1) Activate IWDG (not needed if done in option bytes) */
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/* (2) Enable write access to IWDG registers */
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/* (3) Set prescaler by 64 (1.6ms for each tick) */
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/* (4) Set reload value to have a rollover each 2s */
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/* (5) Check if flags are reset */
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/* (6) Refresh counter */
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IWDG->KR = IWDG_START; /* (1) */
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IWDG->KR = IWDG_WRITE_ACCESS; /* (2) */
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IWDG->PR = IWDG_PR_PR_1; /* (3) */
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IWDG->RLR = 1250; /* (4) */
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tmout = 16000000;
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while(IWDG->SR){if(--tmout == 0) break;} /* (5) */
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IWDG->KR = IWDG_REFRESH; /* (6) */
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}
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#define USND(str) do{USB_send((uint8_t*)str, sizeof(str)-1);}while(0)
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char *parse_cmd(char *buf){
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static char btns[] = "BTN0=0, BTN1=0\n";
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if(buf[1] != '\n') return buf;
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switch(*buf){
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case '0':
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pin_set(GPIOA, 1<<4);
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break;
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case '1':
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pin_clear(GPIOA, 1<<4);
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break;
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case 'b':
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btns[5] = GET_BTN0() + '0';
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btns[13] = GET_BTN1() + '0';
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return btns;
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break;
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case 'p':
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pin_toggle(USBPU_port, USBPU_pin);
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SEND("USB pullup is ");
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if(pin_read(USBPU_port, USBPU_pin)) SEND("off");
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else SEND("on");
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newline();
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break;
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case 'A':
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return u2str(getADCval(0));
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break;
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case 'L':
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USND("Very long test string for USB (it's length is more than 64 bytes).\n"
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"This is another part of the string! Can you see all of this?\n");
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return "Long test sent\n";
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break;
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case 'R':
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USND("Soft reset\n");
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SEND("Soft reset\n");
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NVIC_SystemReset();
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break;
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case 'S':
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USND("Test string for USB\n");
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return "Short test sent\n";
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break;
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case 'T':
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return u2str(getMCUtemp());
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break;
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case 'V':
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return u2str(getVdd());
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break;
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case 'W':
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USND("Wait for reboot\n");
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SEND("Wait for reboot\n");
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while(1){nop();};
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break;
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default: // help
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return
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"0/1 - turn on/off LED1\n"
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"'b' - get buttons's state\n"
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"'p' - toggle USB pullup\n"
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"'A' - get ADC8 value\n"
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"'L' - send long string over USB\n"
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"'R' - software reset\n"
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"'S' - send short string over USB\n"
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"'T' - MCU temperature\n"
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"'V' - Vdd\n"
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"'W' - test watchdog\n"
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;
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break;
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}
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return NULL;
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}
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// usb getline
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char *get_USB(){
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static char tmpbuf[512], *curptr = tmpbuf;
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static int rest = 511;
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int x = USB_receive((uint8_t*)curptr);
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curptr[x] = 0;
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if(!x) return NULL;
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if(curptr[x-1] == '\n'){
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curptr = tmpbuf;
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rest = 511;
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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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SEND("USB buffer overflow!\n");
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curptr = tmpbuf;
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rest = 511;
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}
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return NULL;
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}
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//int8_t dump = 0;
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int main(void){
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uint32_t lastT = 0, lastB = 0, LEDperiod = 499;
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sysreset();
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StartHSE();
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hw_setup();
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usart_setup();
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SysTick_Config(72000);
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SEND("Hello! I'm ready.\n");
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if(RCC->CSR & RCC_CSR_IWDGRSTF){ // watchdog reset occured
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SEND("WDGRESET=1\n");
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}
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if(RCC->CSR & RCC_CSR_SFTRSTF){ // software reset occured
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SEND("SOFTRESET=1\n");
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}
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RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
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USBPU_OFF();
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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(lastT > Tms || Tms - lastT > LEDperiod){
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LED_blink(LED0);
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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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usb_proc();
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int r = 0;
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char *txt, *ans;
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if((txt = get_USB())){
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ans = parse_cmd(txt);
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SEND("Received data over USB:\n");
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SEND(txt);
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newline();
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if(ans){
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uint16_t l = 0; char *p = ans;
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while(*p++) l++;
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USB_send((uint8_t*)ans, l);
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}
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}
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if(usartrx()){ // usart1 received data, store in in buffer
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r = usart_getline(&txt);
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if(r){
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txt[r] = 0;
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ans = parse_cmd(txt);
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if(ans){
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usart_send(ans);
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transmit_tbuf();
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}
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}
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}
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// check buttons - each 50ms (increase / decrease LED blinking period by 10)
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if(Tms - lastB > 49){
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lastB = Tms;
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uint8_t btn0 = GET_BTN0(), btn1 = GET_BTN1();
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// both: set to default
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if(btn0 && btn1){
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LEDperiod = 499;
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}else if(btn0){
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if(LEDperiod < 1989) LEDperiod += 10;
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}else if(btn1){
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if(LEDperiod > 29) LEDperiod -= 10;
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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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