mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 18:55:13 +03:00
108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/*
|
||
* main.c
|
||
*
|
||
* Copyright 2014 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
|
||
*
|
||
* This program is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; either version 2 of the License, or
|
||
* (at your option) any later version.
|
||
*
|
||
* This program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with this program; if not, write to the Free Software
|
||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||
* MA 02110-1301, USA.
|
||
*/
|
||
|
||
#include "main.h"
|
||
#include "hw_init.h"
|
||
#include "spi.h"
|
||
#include "cdcacm.h"
|
||
#include "pcd8544.h"
|
||
|
||
volatile uint32_t Timer = 0; // global timer (milliseconds)
|
||
usbd_device *usbd_dev;
|
||
|
||
/**
|
||
* print current time in milliseconds: 4 bytes for ovrvlow + 4 bytes for time
|
||
* with ' ' as delimeter
|
||
*/
|
||
void print_time(){
|
||
print_int(Timer);
|
||
}
|
||
|
||
|
||
int main(){
|
||
uint32_t Old_timer = 0;
|
||
|
||
// RCC clocking: 8MHz oscillator -> 72MHz system
|
||
rcc_clock_setup_in_hse_8mhz_out_72mhz();
|
||
|
||
GPIO_init();
|
||
|
||
usb_disconnect(); // turn off USB while initializing all
|
||
|
||
// USB
|
||
usbd_dev = USB_init();
|
||
|
||
// SysTick is a system timer with 1ms period
|
||
SysTick_init();
|
||
|
||
switch_SPI(SPI1);
|
||
SPI_init();
|
||
pcd8544_init();
|
||
|
||
usb_connect(); // turn on USB
|
||
|
||
pcd8544_print((uint8_t*)"÷ÓÅ × ÐÏÒÑÄËÅ\n\nAll OK\n");
|
||
|
||
uint8_t wb;
|
||
int i;
|
||
while(1){
|
||
usbd_poll(usbd_dev);
|
||
if(usbdatalen){
|
||
for(i = 0; i < usbdatalen; ++i){
|
||
uint8_t rb = (uint8_t)usbdatabuf[i];
|
||
wb = pcd8544_putch(rb);
|
||
if(wb == rb){
|
||
pcd8544_roll_screen();
|
||
wb = pcd8544_putch(rb);
|
||
}
|
||
if(wb != rb){
|
||
usb_send(rb);
|
||
if(wb == '\n') usb_send('\n');
|
||
}
|
||
}
|
||
usbdatalen = 0;
|
||
}
|
||
//check_and_parse_UART(USART1); // also check data in UART buffers
|
||
if(Timer - Old_timer > 999){ // one-second cycle
|
||
Old_timer += 1000;
|
||
//print_int(Timer / 1000);newline();
|
||
}else if(Timer < Old_timer){ // Timer overflow
|
||
Old_timer = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* SysTick interrupt: increment global time & send data buffer through USB
|
||
*/
|
||
void sys_tick_handler(){
|
||
Timer++;
|
||
usbd_poll(usbd_dev);
|
||
usb_send_buffer();
|
||
}
|
||
|
||
// pause function, delay in ms
|
||
void Delay(uint16_t time){
|
||
uint32_t waitto = Timer + time;
|
||
while(Timer < waitto);
|
||
}
|