/* */
#include "public.h"
#define TXD GPIO_Pin_9
#define RXD GPIO_Pin_10
void GPIOINIT() //???B?????
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=TXD;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable , ENABLE);
GPIO_InitStructure.GPIO_Pin=RXD;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void RCCINIT() //?????????
{
SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //?????ù???????
}
void USARTINIT()
{
USART_InitTypeDef USART_InitStructure;
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_Tx | USART_Mode_Rx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1,ENABLE);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_ClearFlag(USART1,USART_FLAG_TC);
}
void NVICINIT()
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void IWDGINIT()
{
IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);//?????????д????
IWDG_SetPrescaler(IWDG_Prescaler_64);//????IWDG?????//40K/64=1.6ms
IWDG_SetReload(800);//????IWDG?????? 12λ???0~4095??//800*1.6ms=1.28s
IWDG_ReloadCounter();//????IWDG?????????????????IWDG??????
IWDG_Enable();//???IWDG
}
int fputc(int ch,FILE *p)
{
USART_SendData(USART1,(u8)ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
return ch;
}
int main()
{
RCCINIT();
GPIOINIT();
USARTINIT();
NVICINIT();
IWDGINIT();
printf("??????????????\r\n");
printf("88888888888\r\n");
while(1)
{
IWDG_ReloadCounter();
printf("????ι????\r\n");
delayms(500);
}
}
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