我串口配置代码如下：
[mw_shl_code=c,true] USART_InitStructure.Instance = USART1; USART_InitStructure.Init.BaudRate = 115200; USART_InitStructure.Init.WordLength = USART_WORDLENGTH_8B; USART_InitStructure.Init.StopBits = USART_STOPBITS_1; USART_InitStructure.Init.Parity = USART_PARITY_ODD; USART_InitStructure.Init.Mode = USART_MODE_TX_RX; USART_InitStructure.Init.CLKLastBit = USART_LASTBIT_ENABLE; USART_InitStructure.Init.CLKPhase = USART_PHASE_2EDGE; USART_InitStructure.Init.CLKPolarity = USART_POLARITY_HIGH; USART_InitStructure.State = HAL_USART_STATE_READY; HAL_USART_Init(&USART_InitStructure); HAL_USART_IRQHandler(&USART_InitStructure);[/mw_shl_code] 我IO口配置如下：
[mw_shl_code=c,true]GPIO_InitStructure.Pin = GPIO_PIN_9; GPIO_InitStructure.Mode = GPIO_MODE_AF_PP; GPIO_InitStructure.Pull = GPIO_PULLUP; GPIO_InitStructure.Speed = GPIO_SPEED_FAST; GPIO_InitStructure.Alternate = GPIO_AF7_USART1; //IS_GPIO_AF(GPIO_InitStructure.Alternate); HAL_GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_InitStructure.Pin = GPIO_PIN_10; GPIO_InitStructure.Pull = GPIO_NOPULL; GPIO_InitStructure.Alternate = GPIO_AF7_USART1; //IS_GPIO_AF(GPIO_InitStructure.Alternate); HAL_GPIO_Init(GPIOA,&GPIO_InitStructure);[/mw_shl_code] 时钟配置如下：
[mw_shl_code=c,true]__GPIOA_CLK_ENABLE(); __USART1_CLK_ENABLE();[/mw_shl_code] 可是我在main函数中如下调用时，却返现：我没有发送数据，411芯片还在不停地发送数据，这是怎么回事呢：
[mw_shl_code=c,true]while(1) { HAL_USART_Receive(&USART_InitStructure, prxdata, 1, 0x5ffff); if(*prxdata == 0x3a) { HAL_USART_Transmit(&USART_InitStructure, ptxdata, 1, 0x5ffff); } }[/mw_shl_code]