#include "stm32f10x.h"
void My_USART_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
USART_InitStructure.USART_BaudRate=9600;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Tx|USART_Mode_Rx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_InitStructure.USART_BaudRate=9600;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Tx|USART_Mode_Rx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_Init(USART2,&USART_InitStructure);
USART_Cmd(USART1,ENABLE); //使能串口1
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//打开接受中断
USART_Cmd(USART2,ENABLE); //使能串口2
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//打开接受中断
NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel=USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=2;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_IRQHandler(void)
{
u8 res1;
if(USART_GetITStatus(USART1,USART_IT_RXNE))
{
res1=USART_ReceiveData(USART1);
USART_SendData(USART2,res1);
}
}
void USART2_IRQHandler(void)
{
u8 res2;
if(USART_GetITStatus(USART2,USART_IT_RXNE))
{
res2=USART_ReceiveData(USART2);
USART_SendData(USART1,res2);
}
}
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
My_USART_Init();
while(1);
}
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