单片机STM32F407开发板DMF407电机开发板平台keil V5.31HSE 为8MHZHSI为16MHZ原理图串口工具主函数uint8_t g_usart_tx_buf[8]; int main(void) { uint8_t len; uint16_t times 0; HAL_Init(); /* 初始化HAL库 */ sys_stm32_clock_init(336, 8, 2, 7); /* 设置时钟,168Mhz */ delay_init(168); /* 延时初始化 */ usart_init(115200); /* 串口初始化为115200 */ led_init(); /* 初始化LED */ while(1) { g_usart_tx_buf[0]1; g_usart_tx_buf[1]2; g_usart_tx_buf[2]3; g_usart_tx_buf[3]4; g_usart_tx_buf[4]5; g_usart_tx_buf[5]6; g_usart_tx_buf[6]7; g_usart_tx_buf[7]8; HAL_UART_Transmit(g_uart1_handle, (uint8_t*)g_usart_tx_buf, 8, 1000); /*发送接收到的数据*/ while(__HAL_UART_GET_FLAG(g_uart1_handle, UART_FLAG_TC) ! SET); /*等待发送结束*/ delay_ms(500); } }串口配置#define USART_TX_GPIO_PORT GPIOD #define USART_TX_GPIO_PIN GPIO_PIN_2 #define USART_TX_GPIO_AF GPIO_AF8_UART5 #define USART_TX_GPIO_CLK_ENABLE() do{ __HAL_RCC_GPIOD_CLK_ENABLE(); }while(0) /* 发送引脚时钟使能 */ #define USART_RX_GPIO_PORT GPIOC #define USART_RX_GPIO_PIN GPIO_PIN_12 #define USART_RX_GPIO_AF GPIO_AF8_UART5 #define USART_RX_GPIO_CLK_ENABLE() do{ __HAL_RCC_GPIOC_CLK_ENABLE(); }while(0) /* 接收引脚时钟使能 */ #define USART_UX UART5 #define USART_UX_IRQn UART5_IRQn #define USART_UX_IRQHandler UART5_IRQHandler #define USART_UX_CLK_ENABLE() do{ __HAL_RCC_UART5_CLK_ENABLE(); }while(0) /* USART1 时钟使能 */ void usart_init(uint32_t baudrate) { g_uart1_handle.Instance USART_UX; /* USART1 */ g_uart1_handle.Init.BaudRate baudrate; /* 波特率 */ g_uart1_handle.Init.WordLength UART_WORDLENGTH_8B; /* 字长为8位数据格式 */ g_uart1_handle.Init.StopBits UART_STOPBITS_1; /* 一个停止位 */ g_uart1_handle.Init.Parity UART_PARITY_NONE; /* 无奇偶校验位 */ g_uart1_handle.Init.HwFlowCtl UART_HWCONTROL_NONE; /* 无硬件流控 */ g_uart1_handle.Init.Mode UART_MODE_TX_RX; /* 收发模式 */ HAL_UART_Init(g_uart1_handle); /* HAL_UART_Init()会使能UART1 */ /* 该函数会开启接收中断标志位UART_IT_RXNE并且设置接收缓冲以及接收缓冲接收最大数据量 */ HAL_UART_Receive_IT(g_uart1_handle, (uint8_t *)g_rx_buffer, RXBUFFERSIZE); } HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart) { /* Check the UART handle allocation */ if (huart NULL) { return HAL_ERROR; } /* Check the parameters */ if (huart-Init.HwFlowCtl ! UART_HWCONTROL_NONE) { /* The hardware flow control is available only for USART1, USART2, USART3 and USART6. Except for STM32F446xx devices, that is available for USART1, USART2, USART3, USART6, UART4 and UART5. */ assert_param(IS_UART_HWFLOW_INSTANCE(huart-Instance)); assert_param(IS_UART_HARDWARE_FLOW_CONTROL(huart-Init.HwFlowCtl)); } else { assert_param(IS_UART_INSTANCE(huart-Instance)); } assert_param(IS_UART_WORD_LENGTH(huart-Init.WordLength)); assert_param(IS_UART_OVERSAMPLING(huart-Init.OverSampling)); if (huart-gState HAL_UART_STATE_RESET) { /* Allocate lock resource and initialize it */ huart-Lock HAL_UNLOCKED; #if (USE_HAL_UART_REGISTER_CALLBACKS 1) UART_InitCallbacksToDefault(huart); if (huart-MspInitCallback NULL) { huart-MspInitCallback HAL_UART_MspInit; } /* Init the low level hardware */ huart-MspInitCallback(huart); #else /* Init the low level hardware : GPIO, CLOCK */ HAL_UART_MspInit(huart); #endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */ } huart-gState HAL_UART_STATE_BUSY; /* Disable the peripheral */ __HAL_UART_DISABLE(huart); /* Set the UART Communication parameters */ UART_SetConfig(huart); /* In asynchronous mode, the following bits must be kept cleared: - LINEN and CLKEN bits in the USART_CR2 register, - SCEN, HDSEL and IREN bits in the USART_CR3 register.*/ CLEAR_BIT(huart-Instance-CR2, (USART_CR2_LINEN | USART_CR2_CLKEN)); CLEAR_BIT(huart-Instance-CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN)); /* Enable the peripheral */ __HAL_UART_ENABLE(huart); /* Initialize the UART state */ huart-ErrorCode HAL_UART_ERROR_NONE; huart-gState HAL_UART_STATE_READY; huart-RxState HAL_UART_STATE_READY; return HAL_OK; } void HAL_UART_MspInit(UART_HandleTypeDef *huart) { GPIO_InitTypeDef gpio_init_struct; if(huart-Instance USART_UX) /* 如果是串口1进行串口1 MSP初始化 */ { USART_UX_CLK_ENABLE(); /* USART1 时钟使能 */ USART_TX_GPIO_CLK_ENABLE(); /* 发送引脚时钟使能 */ USART_RX_GPIO_CLK_ENABLE(); /* 接收引脚时钟使能 */ gpio_init_struct.Pin USART_TX_GPIO_PIN; /* TX引脚 */ gpio_init_struct.Mode GPIO_MODE_AF_PP; /* 复用推挽输出 */ gpio_init_struct.Pull GPIO_PULLUP; /* 上拉 */ gpio_init_struct.Speed GPIO_SPEED_FREQ_HIGH; /* 高速 */ gpio_init_struct.Alternate USART_TX_GPIO_AF; /* 复用为USART1 */ HAL_GPIO_Init(USART_TX_GPIO_PORT, gpio_init_struct); /* 初始化发送引脚 */ gpio_init_struct.Pin USART_RX_GPIO_PIN; /* RX引脚 */ gpio_init_struct.Alternate USART_RX_GPIO_AF; /* 复用为USART1 */ HAL_GPIO_Init(USART_RX_GPIO_PORT, gpio_init_struct); /* 初始化接收引脚 */ #if USART_EN_RX HAL_NVIC_EnableIRQ(USART_UX_IRQn); /* 使能USART1中断通道 */ HAL_NVIC_SetPriority(USART_UX_IRQn, 3, 3); /* 抢占优先级3子优先级3 */ #endif } }测试结果貌似数据移位了。用另外一个串口工具测试测试结果两个串口工具的测试结果是一样的。将串口工具接收脚接到TPT3232E的pin11接收到的数据正常