STM32系列第8篇--串口配置步驟

//初始化串口1void My_USART1_Init(void){ GPIO_InitTypeDef GPIO_InitStrue; USART_InitTypeDef USART_InitStrue; NVIC_InitTypeDef NVIC_InitStrue; //串口時(shí)鐘使能，GPIO時(shí)鐘使能 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); //GPIO端口模式設(shè)置，PA9設(shè)置推挽復(fù)用，PA10設(shè)置浮空模式 GPIO_InitStrue.GPIO_Mode=GPIO_Mode_AF_PP; GPIO_InitStrue.GPIO_Pin=GPIO_Pin_9; GPIO_InitStrue.GPIO_Speed=GPIO_Speed_10MHz; GPIO_Init(GPIOA,&GPIO_InitStrue); GPIO_InitStrue.GPIO_Mode=GPIO_Mode_IN_FLOATING; GPIO_InitStrue.GPIO_Pin=GPIO_Pin_10; GPIO_InitStrue.GPIO_Speed=GPIO_Speed_10MHz; GPIO_Init(GPIOA,&GPIO_InitStrue); //串口參數(shù)的初始化 USART_InitStrue.USART_BaudRate=115200; //波特率 USART_InitStrue.USART_HardwareFlowControl=USART_HardwareFlowControl_None; //硬件流 //全雙工模式 USART_InitStrue.USART_Mode=USART_Mode_Tx|USART_Mode_Rx; USART_InitStrue.USART_Parity=USART_Parity_No; //奇偶校驗(yàn)位 USART_InitStrue.USART_StopBits=USART_StopBits_1;//停止位 USART_InitStrue.USART_WordLength=USART_WordLength_8b;//字長(zhǎng) USART_Init(USART1,&USART_InitStrue); //使能串口 USART_Cmd(USART1,ENABLE); //開(kāi)啟接收中斷 USART_ITConfig(USART1,USART_IT_RXNE,ENABLE); //初始化NVIC NVIC_InitStrue.NVIC_IRQChannel=USART1_IRQn; NVIC_InitStrue.NVIC_IRQChannelCmd=ENABLE; NVIC_InitStrue.NVIC_IRQChannelPreemptionPriority=1; //設(shè)置搶占優(yōu)先級(jí) NVIC_InitStrue.NVIC_IRQChannelSubPriority=1; //設(shè)置相應(yīng)優(yōu)先級(jí) NVIC_Init(&NVIC_InitStrue);}//中斷處理函數(shù)void USART1_IRQHandler(void){ u8 res; if(USART_GetITStatus(USART1,USART_IT_RXNE)) { res= USART_ReceiveData(USART1); USART_SendData(USART1,res); }}//主函數(shù)int main(void){ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); My_USART1_Init(); while(1);}