main.c

来自「Cortex-m3微控制器软件接口标准 不错的资料」· C语言 代码 · 共 67 行

/******************************************************************************
 * @file:    main.c
 * @purpose: CMSIS Cortex-M3 Core Peripheral Access Layer Source File
 * @version: V1.0
 * @date:    12. Nov. 2008
 *----------------------------------------------------------------------------
 *
 * Copyright (C) 2008 ARM Limited. All rights reserved.
 *
 * ARM Limited (ARM) is supplying this software for use with Cortex-M3 
 * processor based microcontrollers.  This file can be freely distributed 
 * within development tools that are supporting such ARM based processors. 
 *
 * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
 * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 *
 ******************************************************************************/


#include "stm32.h"
#include "main.h"


volatile unsigned int seconds=0;


int main(void)
{
  SystemInit();

  if (SysTick_Config(SystemFrequency / 1000))             /* Setup SysTick Timer for 1 msec interrupts  */
  {  
    while (1);                                            /* Capture error */
  }
  
  
  
  while(1)
  {
    ;
  }
  
}




// ###################################  Demo SysTick Handler  ##########################

void SysTick_Handler(void)
{
  static int count=0;
  
  count++;
    
  if(count >= 1000)
  {
    count=0;
    seconds++;
  }
}