STM32串口1从PA9 PA10重映射到PB6、PB7
作者:互联网
/// 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
}
}
标签:PB7,PB6,USART,NVIC,InitStructure,Mode,串口,GPIO,USART1 来源: https://blog.csdn.net/danliandeyu/article/details/120845592