谁能帮我看看这个窗口看门狗的程序，谢谢

xiaolei_88

#include "stm32f10x.h"

//#include "stm32_eval.h"

#include "stdio.h"

void RCC_Configuration(void);

void NVIC_Configuration(void);

void GPIO_Configuration(void);

void EXTI_Configuration(void);

void USART_Configuration(void);

void WWDG_Configuration(void);

int fputc(int ch , FILE *f)

{

USART_SendData(USART1 , (u8) ch);

while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET);

return ch;

}

int main(void)

{

 RCC_Configuration( );

NVIC_Configuration( );

GPIO_Configuration( );

EXTI_Configuration( );

  USART_Configuration( );

    WWDG_Configuration( );

printf("ready");

if(RCC_GetFlagStatus(RCC_FLAG_WWDGRST) != RESET)

  {

  printf("/n has been reset by wwdg");

RCC_ClearFlag();

  }

else

  {

   WWDG_Configuration();

printf("has been reset by wwdg before/n");

  }

  while(1);

}

void RCC_Configuration(void)

{

ErrorStatus  HSEStartUpStatus;

RCC_DeInit();

RCC_HSEConfig(RCC_HSE_ON);

HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)

{

RCC_HCLKConfig(RCC_SYSCLK_Div1);

RCC_PCLK1Config(RCC_HCLK_Div2);

RCC_PCLK2Config(RCC_HCLK_Div1);

FLASH_SetLatency(FLASH_Latency_2);

FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

RCC_PLLConfig(RCC_PLLSource_HSE_Div1 , RCC_PLLMul_9);

RCC_PLLCmd(ENABLE);

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

while(RCC_GetSYSCLKSource() != 0x08);

}

}

void GPIO_Configuration(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

//设置PA13管脚

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOA , &GPIO_InitStructure);

//配置PA13为外部中断线

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA , GPIO_PinSource0);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA , &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOA , &GPIO_InitStructure);

}

void EXTI_Configuration(void)

{

EXTI_InitTypeDef EXTI_InitStructure;

EXTI_InitStructure.EXTI_Line = EXTI_Line13;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA , GPIO_PinSource0); 

}

void WWDG_Configuration(void)

{

WWDG_SetPrescaler(WWDG_Prescaler_8);   //设置窗口看门狗频率36M/4096/8

    WWDG_Enable(0x7f);  //设置窗口看门狗计数器值

WWDG_ClearFlag();  //清除早期唤醒中断

WWDG_EnableIT();

// printf("2");

}

void NVIC_Configuration(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

 

NVIC_InitStructure.NVIC_IRQChannel = WWDG_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_Init(&NVIC_InitStructure);

}

void USART_Configuration(void)

{

USART_InitTypeDef  USART_InitStructure;

USART_ClockInitTypeDef  USART_ClockInitStructure;

USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;

USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;

USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;

USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;

USART_ClockInit(USART1 , &USART_ClockInitStructure);

USART_InitStructure.USART_BaudRate = 9600;

USART_InitStructure.USART_WordLength = USART_WordLength_8b;

USART_InitStructure.USART_StopBits = USART_StopBits_1;

USART_InitStructure.USART_Parity = USART_Parity_No;

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

USART_Init(USART1 , &USART_InitStructure);

USART_Cmd(USART1 , ENABLE);

}

void WWDG_IRQHandler(void)

{

WWDG_SetCounter(0x7f);

WWDG_SetWindowValue(0x50);

WWDG_ClearFlag();

printf("\n the wwdg has been flash");

}

void EXTI15_10_IRQHandler(void)

{

printf("da  duan WWDG");

while(1);

}

xiaolei_88

我通过串口和KEY0看串口打印出的消息，现在打印不出，帮帮我

xiaolei_88

找到原因了少写了两句话


RCC_APB1PeriphClockCmd(RCC_APB1Periph_WWDG,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1 , ENABLE);

正点原子

自己解决了就好.

xiaolei_88

嗯嗯，谢谢哈