stm32串口1和串口3数据互通

stm32串口1和串口3数据互通，经测试同时发256字节不丢包 void usart3_init(u32 bound) { NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); // GPIOBʱÖÓ RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE); //´®¿Ú3ʱÖÓʹÄÜ USART_DeInit(USART3); //¸´Î»´®¿Ú3 //USART3_TX PB10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB10 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö GPIO_Init(GPIOB, &GPIO;_InitStructure); //³õʼ»¯PB10 //USART3_RX PB11 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//¸¡¿ÕÊäÈë GPIO_Init(GPIOB, &GPIO;_InitStructure); //³õʼ»¯PB11 USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÒ»°ãÉèÖÃΪ9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½ USART_Init(USART3, &USART;_InitStructure); //³õʼ»¯´®¿Ú 3 USART_Cmd(USART3, ENABLE); //ʹÄÜ´®¿Ú //ʹÄܽÓÊÕÖÐ¶Ï USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//¿ªÆôÖÐ¶Ï //ÉèÖÃÖжÏÓÅÏȼ¶ NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//ÇÀÕ¼ÓÅÏȼ¶3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //×ÓÓÅÏȼ¶3 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ NVIC_Init(&NVIC;_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷ TIM4_Int_Init(1000-1,7200-1); //10msÖÐ¶Ï USART3_RX_STA=0; //ÇåÁã TIM_Cmd(TIM4,DISABLE); //¹Ø±Õ¶¨Ê±Æ÷7 } //´®¿Ú3,printf º¯Êý //È·±£Ò»´Î·¢ËÍÊý¾Ý²»³¬¹