程序采用的是以原子哥的串口通讯例程,用的是查询接受方式,USART1里的中断已经设置关闭。
void uart_init(u32 bound){
//GPIO
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//
//
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10
//USART1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9GPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //
GPIO_Init(GPIOA,&GPIO_InitStructure); //
//USART1 3õê¼»ˉéèÖÃ
USART_InitStructure.USART_BaudRate = bound;//
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); //
USART_Cmd(USART1, ENABLE); //
//USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART1_RX
USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);//
//Usart1 NVIC
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //
NVIC_Init(&NVIC_InitStructure); //
#endif
}
板子的整体照 拍来看看
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