iwdg.c

STM32 开发板例子:IWDG 内部看门狗. 开发环境:Keil For ARM

/*

                         \\\|///
                       \\  - -  //
                        (  @ @  )
+---------------------oOOo-(_)-oOOo-------------------------+
|                 智林STM32开发板试验程序                   |
|                      看门狗复位实验                       |
|                 刘笑然 by Xiaoran Liu                     |
|                        2008.4.16                          |
|                                                           |
|           智林测控技术研究所 ZERO research group          |
|                      www.the0.net                         |
|                             Oooo                          |
+-----------------------oooO--(   )-------------------------+
                       (   )   ) /
                        \ (   (_/
                         \_)     

*/
/*----------------------------------------------------------*\
 |  引入相关芯片的头文件                                    |
\*----------------------------------------------------------*/
#include <stdio.h>
#include <stm32f10x_lib.h>    // STM32F10x Library Definitions
#include "STM32_Init.h"       // STM32 Initialization
#include "TFT018.h"

int ledLight = 0;
/*----------------------------------------------------------*\
 | HARDWARE DEFINE                                          |
\*----------------------------------------------------------*/
#define LED             ( 1 << 5 )                // PB5: LED D2
/*----------------------------------------------------------*\
 |  Delay                                                   |
 |  延时 Inserts a delay time.                              |
 |  nCount: 延时时间                                        |
 |  nCount: specifies the delay time length.                |
\*----------------------------------------------------------*/
void Delay(unsigned int nCount) {
  for(; nCount != 0; nCount--);
  }
/*----------------------------------------------------------*\
 | MIAN ENTRY                                               |
\*----------------------------------------------------------*/
int main (void) {
  int i;

  stm32_Init ();                                // STM32 setup

  LCD_Init();
  LCD_Clear_Screen(Blue);

  Font = 0;
  LCD_PutString(30,0,"STM32F 开发板",Cyan,Blue);
  LCD_PutString(25,16,"看门狗复位实验",Red,Yellow);
  Font = 1;
  LCD_PutString(38,32,"Version 1.0",Green,Blue);
  Font = 0;
  LCD_PutString(10,94,"智林测控技术研究所",Yellow,Blue);
  LCD_PutString(36,111,"www.the0.net",Magenta,Blue);

  if (RCC->CSR & (1<<29)) {                       // IWDG Reset Flag set
    RCC->CSR |= (1<<24);                          // Clear Reset Flags
    GPIOB->ODR |=  LED;                           // switch on LED
    LCD_PutString(45,50,"看门狗复位",Yellow,Red);
    }
  else {
    GPIOB->ODR &= ~LED;                           // switch off LED
    LCD_PutString(45,50," 开机复位 ",Blue,Yellow);
    }

  for (i = 0; i < 10; i++) {
    Delay(1000000);                               // wait less than watchdog interval
    IWDG->KR  = 0xAAAA;                           // reload the watchdog
  }
  GPIOB->ODR |=  LED;                           // switch on LED

  for(;;) {
  	}
  }
/*----------------------------------------------------------*\
 | END OF FILE                                              |
\*----------------------------------------------------------*/