mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 10:45:11 +03:00
99 lines
2.3 KiB
C
99 lines
2.3 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 "hardware_ini.h"
|
|
#include "cdcacm.h"
|
|
#include "uart.h"
|
|
#include "GPS.h"
|
|
|
|
volatile uint32_t Ticks = 0; // global ticks (10kHz)
|
|
volatile uint32_t Timer = 0; // global timer (milliseconds)
|
|
usbd_device *usbd_dev;
|
|
|
|
int main(){
|
|
uint32_t usb_timer = 0;
|
|
uint8_t *string;
|
|
// 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();
|
|
UART_init(USART2); // init GPS UART
|
|
|
|
// wait a little and then turn on USB pullup
|
|
// for (i = 0; i < 0x800000; i++)
|
|
// __asm__("nop");
|
|
|
|
usb_connect(); // turn on USB
|
|
|
|
GPS_send_start_seq();
|
|
|
|
while(1){
|
|
usbd_poll(usbd_dev);
|
|
if(usbdatalen){ // there's something in USB buffer
|
|
usbdatalen = parce_incoming_buf(usbdatabuf, usbdatalen);
|
|
}
|
|
if((string = check_UART2()))
|
|
GPS_parse_answer(string);
|
|
if(Ticks - usb_timer > 9){ // 1ms cycle
|
|
usb_timer += 10;
|
|
//usb_send_buffer();
|
|
}else if(Ticks < usb_timer){ // Timer overflow
|
|
usb_timer = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* SysTick interrupt: increment global time & send data buffer through USB
|
|
*/
|
|
void sys_tick_handler(){
|
|
static int T = 0; // 0..10 - for millisecond timer
|
|
++Ticks;
|
|
if(++T == 10){
|
|
usb_send_buffer();
|
|
++Timer;
|
|
T = 0;
|
|
}
|
|
}
|
|
|
|
// pause function, delay in ms
|
|
void Delay(uint16_t _U_ time){
|
|
uint32_t waitto = Timer + time;
|
|
while(Timer < waitto);
|
|
}
|
|
|
|
/**
|
|
* print current time in milliseconds
|
|
*/
|
|
void print_time(){
|
|
print_int(Timer);
|
|
}
|