stm32f429 HAL库 freertos 实现USART1 printf输出 使用DMA发送数据DMA传输完成并发送信号量

以下是使用STM32F429 HAL库和FreeRTOS实现USART1 printf输出并使用DMA发送数据DMA传输完成并发送信号量的步骤：

在CubeMX中配置USART1和DMA
- 在Pinout & Configuration中，将USART1的TX引脚配置为GPIO_AF7_USART1，并启用USART1
- 在DMA中，启用DMA2和USART1 TX的DMA通道

在main.c中添加以下代码：

#include "stdio.h"
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#include "stm32f4xx_hal.h"

UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;
SemaphoreHandle_t xSemaphore;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART1_UART_Init(void);

int __io_putchar(int ch)
{
    HAL_UART_Transmit_DMA(&huart1, (uint8_t*)&ch, 1);
    xSemaphoreTake(xSemaphore, portMAX_DELAY);
    return ch;
}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
    xSemaphoreGiveFromISR(xSemaphore, pdFALSE);
}

int main(void)
{
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_DMA_Init();
    MX_USART1_UART_Init();

    xSemaphore = xSemaphoreCreateBinary();
    xSemaphoreGive(xSemaphore);

    printf("Hello World!\r\n");

    while (1)
    {
        vTaskDelay(1000);
    }
}

void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct;
    RCC_ClkInitTypeDef RCC_ClkInitStruct;

    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLM = 25;
    RCC_OscInitStruct.PLL.PLLN = 360;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
    RCC_OscInitStruct.PLL.PLLQ = 7;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                                |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

    HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

    /* SysTick_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

static void MX_USART1_UART_Init(void)
{
    huart1.Instance = USART1;
    huart1.Init.BaudRate = 115200;
    huart1.Init.WordLength = UART_WORDLENGTH_8B;
    huart1.Init.StopBits = UART_STOPBITS_1;
    huart1.Init.Parity = UART_PARITY_NONE;
    huart1.Init.Mode = UART_MODE_TX;
    huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart1) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }
}

static void MX_DMA_Init(void)
{
    __HAL_RCC_DMA2_CLK_ENABLE();

    hdma_usart1_tx.Instance = DMA2_Stream7;
    hdma_usart1_tx.Init.Channel = DMA_CHANNEL_4;
    hdma_usart1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_usart1_tx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart1_tx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_usart1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart1_tx.Init.Mode = DMA_NORMAL;
    hdma_usart1_tx.Init.Priority = DMA_PRIORITY_LOW;
    hdma_usart1_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_usart1_tx) != HAL_OK)
    {
        _Error_Handler(__FILE__, __LINE__);
    }

    __HAL_LINKDMA(&huart1, hdmatx, hdma_usart1_tx);

    HAL_NVIC_SetPriority(DMA2_Stream7_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(DMA2_Stream7_IRQn);
}

static void MX_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;

    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitStruct.Pin = GPIO_PIN_9;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void DMA2_Stream7_IRQHandler(void)
{
    HAL_DMA_IRQHandler(&hdma_usart1_tx);
}

void _Error_Handler(char *file, int line)
{
    printf("Error: %s:%d\r\n", file, line);
    while(1);
}

在Makefile中添加以下代码：

CFLAGS += -DUSE_HAL_DRIVER
CFLAGS += -DSTM32F429xx
CFLAGS += -DUSE_FULL_ASSERT
CFLAGS += -DUSE_STDPERIPH_DRIVER
CFLAGS += -DPRINTF_FLOAT_ENABLE
CFLAGS += -DPRINTF_ADVANCED_ENABLE
CFLAGS += -D__FPU_PRESENT=1
CFLAGS += -DARM_MATH_CM4
CFLAGS += -D__FPU_USED=1
CFLAGS += -I$(HAL)/Inc
CFLAGS += -I$(HAL)/../CMSIS/Device/ST/STM32F4xx/Include
CFLAGS += -I$(HAL)/../CMSIS/Include
CFLAGS += -I$(HAL)/../STM32F4xx_HAL_Driver/Inc
CFLAGS += -I$(FREERTOS)/include
CFLAGS += -I$(FREERTOS)/portable/GCC/ARM_CM4F
CFLAGS += -I$(FREERTOS)/portable/MemMang
SRCS += $(HAL)/Src/*.c
SRCS += $(HAL)/../STM32F4xx_HAL_Driver/Src/*.c
SRCS += $(FREERTOS)/portable/GCC/ARM_CM4F/port.c
SRCS += $(FREERTOS)/portable/MemMang/heap_4.c
SRCS += $(FREERTOS)/tasks.c
SRCS += $(FREERTOS)/list.c
SRCS += $(FREERTOS)/queue.c
SRCS += $(FREERTOS)/timers.c

编译并烧录程序，可以看到串口输出“Hello World!”，并且使用DMA发送数据

stm32f429 HAL库 freertos 实现USART1 printf输出使用DMA发送数据DMA传输完成并发送信号量

stm32f429 HAL库 freertos 实现USART1 printf输出 使用DMA发送数据DMA传输完成并发送信号量

stm32f429 HAL库 freertos 实现USART1 printf输出使用DMA发送数据DMA传输完成并发送信号量