串口自發(fā)自收 設(shè)定串口時(shí)鐘 設(shè)定引腳功能 中斷優(yōu)先級(jí) 設(shè)定串口
Main文件 #include "stm32f10x.h" void RCC_Configuration(void); void GPIO_Configuration(void); void USART_Configuration(void); void NVIC_Configuration(void); int main(void) { RCC_Configuration(); GPIO_Configuration(); NVIC_Configuration(); USART_Configuration();
while(1); } void RCC_Configuration(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); } void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); } void USART_Configuration(void) { USART_InitTypeDef USART_InitStructure; 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_Tx | USART_Mode_Rx; USART_Init(USART1 , &USART_InitStructure); USART_Cmd(USART1, ENABLE); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); /*接收中斷使能*/ } void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; /*3.4的庫不是使用USART1_IRQChannel,看stm32f10x.h吧*/ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } Stm32f10x_it.c加入 void USART1_IRQHandler(void) { unsigned int i; if(USART_GetFlagStatus(USART1,USART_IT_RXNE)==SET) { i = USART_ReceiveData(USART1); USART_SendData(USART1,i); while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) ; } if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { /* 清楚接收中斷標(biāo)志*/ USART_ClearITPendingBit(USART1, USART_IT_RXNE); } } |
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