RT-Thread基于STM32H743的网络通信调试-编程知识

使用STM32H743开发网络通信，本以为会很简单，实际却遇到好多问题，记录一下，以备后续查看。

1.新建工程，系统版本选择的是4.1.1，芯片型号是STM32H743IIK6.

2.修改系统时钟，使用外部25MHz晶振，配置系统时钟为400MHz。

修改drv_clk.c文件里的时钟配置和调试等级为DBG_LOG

配置代码如下：

void system_clock_config(int target_freq_mhz)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

/** Supply configuration update enable
*/
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
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 = 2;
RCC_OscInitStruct.PLL.PLLN = 64;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
    Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
                              |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}

3.注意：如果晶振不是25MHz，配置完时钟初始化后要改一下hal_conf.h里的时钟频率。

4.下载测试

5.打开board.h里的BSP_USING_ETH

6.复制一个ETH的引脚初始化代码到board.c

代码如下：

void HAL_ETH_MspInit(ETH_HandleTypeDef* ethHandle)
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
if(ethHandle->Instance==ETH)
{
/* USER CODE BEGIN ETH_MspInit 0 */

/* USER CODE END ETH_MspInit 0 */
    /* ETH clock enable */
    __HAL_RCC_ETH1MAC_CLK_ENABLE();
    __HAL_RCC_ETH1TX_CLK_ENABLE();
    __HAL_RCC_ETH1RX_CLK_ENABLE();

    __HAL_RCC_GPIOG_CLK_ENABLE();
    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**ETH GPIO Configuration
    PG14     ------> ETH_TXD1
    PG13     ------> ETH_TXD0
    PG11     ------> ETH_TX_EN
    PC1     ------> ETH_MDC
    PA1     ------> ETH_REF_CLK
    PC4     ------> ETH_RXD0
    PA2     ------> ETH_MDIO
    PC5     ------> ETH_RXD1
    PA7     ------> ETH_CRS_DV
    */
    GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_13|GPIO_PIN_11;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* ETH interrupt Init */
    HAL_NVIC_SetPriority(ETH_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(ETH_IRQn);
/* USER CODE BEGIN ETH_MspInit 1 */

/* USER CODE END ETH_MspInit 1 */
}
}

7.打开hal_conf.h里ETH的注释。