STM32UART1的引腳復(fù)用怎么定義？GPIO_InitTypeDefGPIO_InitStructure;USART_InitTypeDefUSART_InitStructure;NVIC_Ini

STM32UART1的引腳復(fù)用怎么定義？

GPIO_InitTypeDefGPIO_InitStructure;

USART_InitTypeDefUSART_InitStructure;

NVIC_InitTypeDefNVIC_InitStruct;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);//使能GPIOA的時(shí)鐘

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//使能USART的時(shí)鐘

/*USART1的端口配置*/

GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);//配置PA9成第二功能引腳

TXGPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1);//配置PA10成第二功能引腳RX

GPIO__PinGPIO_Pin_9|GPIO_Pin_10;

GPIO__ModeGPIO_Mode_AF;

GPIO__SpeedGPIO_Speed_50MHz;

GPIO__OTypeGPIO_OType_PP;

GPIO__PuPdGPIO_PuPd_UP;

GPIO_Init(GPIOA,GPIO_InitStructure);/*USART1的基本是配置*/

USART__BaudRate115200;//波特率

USART__WordLengthUSART_WordLength_8b;

USART__StopBitsUSART_StopBits_1;

USART__ParityUSART_Parity_no;

USART__HardwareFlowControlUSART_HardwareFlowControl_None;

USART__ModeUSART_Mode_Rx|USART_Mode_Tx;

USART_Init(USART1,USART_InitStructure);

USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//使能收不到網(wǎng)絡(luò)中斷

USART_Cmd(USART1,ENABLE);//使能USART1

/*USART1的NVIC中斷配置*/

NVIC_InitStruct.NVIC_IRQChannel USART1_IRQn;

NVIC_InitStruct.NVIC_IRQChannelPriority0x02;

NVIC_InitStruct.NVIC_IRQChannelCmdENABLE;

NVIC_Init(NVIC_InitStruct);

stm32指示燈不亮？

調(diào)試器好象不可能指明GPIO的時(shí)鐘重新初始化，你全面檢查下是不是GPIO的時(shí)鐘就沒(méi)傳送。諸如系統(tǒng)初始化GPIOA時(shí)鐘：

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA);

其實(shí)，到目前為止要先初始化系統(tǒng)時(shí)鐘。