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/// 配置USART1接收中断
void USART1_NVIC_Configuration(void)
{
?? ?NVIC_InitTypeDef NVIC_InitStructure;?
?? ?/* Configure the NVIC Preemption Priority Bits */ ?
?? ?NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
?? ?
?? ?/* Enable the USARTy Interrupt */
?? ?NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;?? ??
?? ?NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
?? ?NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
?? ?NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
?? ?NVIC_Init(&NVIC_InitStructure);
}
?/**
? * @brief ?USART1 GPIO 配置,工作模式配置。115200 8-N-1
? * @param ?无
? * @retval 无
? */
void USART1_Config(void)
{
?? ?GPIO_InitTypeDef GPIO_InitStructure;
?? ?USART_InitTypeDef USART_InitStructure;
?? ?/* config USART1 clock */
?? ?RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOB, ENABLE);
?? ?//开启端口复用功能
?? ?RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
? GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);
?? ?/* USART1 GPIO config */
//?? ?/* Configure USART1 Tx (PA.09) as alternate function push-pull */
//?? ?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); ? ?
//?? ?/* Configure USART1 Rx (PA.10) as input floating */
//?? ?GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
//?? ?GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
//?? ?GPIO_Init(GPIOA, &GPIO_InitStructure);
? ? /* TX PB6 */
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
? ? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
? ? GPIO_Init(GPIOB, &GPIO_InitStructure);
? ? /* ?RX PB7 */
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
? ? GPIO_Init(GPIOB, &GPIO_InitStructure);
?? ?/* USART1 mode config */
?? ?USART_InitStructure.USART_BaudRate = 115200;
?? ?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);
?? ?
?? ?/* 使能串口1接收中断 */
?? ?USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
?? ?USART_Cmd(USART1, ENABLE);
?? ?//配置中断
?? ?USART1_NVIC_Configuration();
}
/// 重定向c库函数printf到USART1
int fputc(int ch, FILE *f)
{
?? ??? ?/* 发送一个字节数据到USART1 */
?? ??? ?USART_SendData(USART1, (uint8_t) ch);
?? ??? ?
?? ??? ?/* 等待发送完毕 */
?? ??? ?while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);?? ??? ?
?? ?
?? ??? ?return (ch);
}
/// 重定向c库函数scanf到USART1
int fgetc(FILE *f)
{
?? ??? ?/* 等待串口1输入数据 */
?? ??? ?while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
?? ??? ?return (int)USART_ReceiveData(USART1);
}
void USART1_IRQHandler(void)
{
?? ?uint8_t ch;
?? ?
?? ?if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
?? ?{ ?? ?
?? ? ? ?//ch = USART1->DR;
?? ??? ??? ?ch = USART_ReceiveData(USART1);
?? ? ??? ?printf( "%c", ch ); ? ?//将接受到的数据直接返回打印
?? ?}?
?? ??
}
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