mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 10:45:11 +03:00
124 lines
3.2 KiB
C
124 lines
3.2 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 "adcrandom.h"
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#include "balls.h"
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#include "fonts.h"
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#include "hardware.h"
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#include "proto.h"
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#include "screen.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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uint8_t countms = 0, rainbow = 0, balls = 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 USBBUFSZ (127)
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// usb getline
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static 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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int x = USB_receive(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 = 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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static void nxtrainbow(){
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for(int i = 0; i < SCREEN_WIDTH; ++i){
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for(int j = 0; j < SCREEN_HEIGHT; ++j){
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DrawPix(i, j, rainbow + i);
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}
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}
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if(++rainbow == 0) rainbow = 1;
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}
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int main(void){
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uint32_t lastT = 0, mscnt = 0, Tmscnt = 0, lastR = 0;
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sysreset();
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StartHSE();
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SysTick_Config(72000);
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RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
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hw_setup();
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USBPU_OFF();
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adc_setup();
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USB_setup();
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PutStringAt(1, SCREEN_HEIGHT-1-curfont->baseline, "Test string");
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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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if(countms){
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if(!Tmscnt){
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Tmscnt = Tms;
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if(!Tmscnt) Tmscnt = 1;
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}else{
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if(Tms - Tmscnt > 99){
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Tmscnt = Tms;
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ClearScreen();
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PutStringAt(5, curfont->height + 1, u2str(++mscnt));
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ScreenON();
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}
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}
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}else{
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mscnt = 0;
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Tmscnt = 0;
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}
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if(rainbow && Tms - lastR > 99){
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lastR = Tms;
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nxtrainbow();
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}
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if(balls) process_balls();
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IWDG->KR = IWDG_REFRESH;
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//process_screen();
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usb_proc();
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char *txt; const char *ans;
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if((txt = get_USB())){
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ans = parse_cmd(txt);
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if(ans) USB_send(ans);
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}
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}
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return 0;
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}
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