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- 2016-7-4
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#include "stm32f10x.h"
void My_USART1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStrue;
USART_InitTypeDef USART_InitStrue;
NVIC_InitTypeDef NVIC_InitStrue;
RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_InitStrue.GPIO_Mode =GPIO_Mode_AF_PP;
GPIO_InitStrue.GPIO_Pin =GPIO_Pin_9;
GPIO_InitStrue.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStrue);
GPIO_InitStrue.GPIO_Mode =GPIO_Mode_IN_FLOATING;
GPIO_InitStrue.GPIO_Pin =GPIO_Pin_10;
GPIO_InitStrue.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStrue);
USART_InitStrue.USART_BaudRate =57600;
USART_InitStrue.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStrue.USART_Mode =USART_Mode_Rx|USART_Mode_Tx;
USART_InitStrue.USART_Parity=USART_Parity_No;
USART_InitStrue.USART_StopBits=USART_StopBits_1;
USART_InitStrue.USART_WordLength=USART_WordLength_8b;
USART_Init(USART1,&USART_InitStrue);
USART_Cmd(USART1,ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
NVIC_InitStrue.NVIC_IRQChannel =USART1_IRQn;
NVIC_InitStrue.NVIC_IRQChannelCmd =ENABLE;
NVIC_InitStrue.NVIC_IRQChannelPreemptionPriority =1;
NVIC_InitStrue.NVIC_IRQChannelSubPriority =1;
NVIC_Init(&NVIC_InitStrue);
}
void USART1_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART1,USART_IT_RXNE ))
{
res= USART_ReceiveData(USART1);
USART_SendData(USART1,res);
}
}
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
My_USART1_Init();
while(1);
}
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最佳答案
查看完整内容[请看2#楼]
你好像没有开启USART1和GPIOA的时钟,你在前面加上RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);这一句开启两个时钟再试试.
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