代码如下,虚心请教:
#include "
STM32f10x.h"
#include "stm32f10x_it.h"
void RCC_Config(void);
void GPIO_Config(void);
void USART_Config(void);
void NVIC_Config(void);
int main(void)
{
RCC_Config();
GPIO_Config();
USART_Config();
NVIC_Config();
while(1)
{
}
}
void NVIC_Config()
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemp
tionPriority=0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void RCC_Config()
{
SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
}
void USART_Config()
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate=9600;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_Mode=USART_Mode_Tx|USART_Mode_Rx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1,USART_IT_TXE,ENABLE);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_Cmd(USART1,ENABLE);
USART_ClearFlag(USART1,USART_FLAG_TC);
USART_ClearFlag(USART1,USART_FLAG_RXNE);
}
void GPIO_Config()
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//Tx
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_9;//Rx
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
中断里面的:
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET)
{
USART_SendData(USART1,USART_ReceiveData(USART1));
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
}
}
还可以数的更详细一点吗
一周热门 更多>