【STM32H7S78-DK测评】-6- SD读写测试
本帖最后由 南来之风 于 2024-9-8 21:53 编辑开发板上有MicroSD卡接口：
根据原理图初始化相应的PIN与时钟：/**
* @brief SD MSP Initialization
* This function configures the hardware resources used in this example
* @param hsd: SD handle pointer
* @retval None
*/
void HAL_SD_MspInit(SD_HandleTypeDef* hsd)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
if(hsd->Instance==SDMMC1)
{
/* USER CODE BEGIN SDMMC1_MspInit 0 */
/* USER CODE END SDMMC1_MspInit 0 */
/** Initializes the peripherals clock
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_SDMMC12;
PeriphClkInit.Sdmmc12ClockSelection = RCC_SDMMC12CLKSOURCE_PLL2S;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
/* Peripheral clock enable */
__HAL_RCC_SDMMC1_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
/**SDMMC1 GPIO Configuration
PD2 ------> SDMMC1_CMD
PC10 ------> SDMMC1_D2
PC11 ------> SDMMC1_D3
PC12 ------> SDMMC1_CK
PC8 ------> SDMMC1_D0
PC9 ------> SDMMC1_D1
*/
GPIO_InitStruct.Pin = GPIO_PIN_2;
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_SDMMC1;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDMMC1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_8|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_AF11_SDMMC1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/* SDMMC1 interrupt Init */
HAL_NVIC_SetPriority(SDMMC1_IRQn, 0, 0);
/* USER CODE BEGIN SDMMC1_MspInit 1 */
/*SDMMC Clk on PLL1S: (64 / 4 * 25 / 2) = 200MHz */
/* Activate PLL1 with HSI as source (HSI is ON at reset) */
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL1.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL1.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL1.PLLM = 16;
RCC_OscInitStruct.PLL1.PLLN = 275;
RCC_OscInitStruct.PLL1.PLLP = 2;
RCC_OscInitStruct.PLL1.PLLQ = 2;
RCC_OscInitStruct.PLL1.PLLR = 2;
RCC_OscInitStruct.PLL1.PLLS = 2;
RCC_OscInitStruct.PLL1.PLLT = 2;
RCC_OscInitStruct.PLL1.PLLFractional = 0;
RCC_OscInitStruct.PLL2.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.PLL3.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
/* Initialization error */
while(1);
}
/*##-1- Enable peripherals and GPIO Clocks #################################*/
__HAL_RCC_SDMMC1_FORCE_RESET();
__HAL_RCC_SDMMC1_RELEASE_RESET();
/* NVIC configuration for SDMMC interrupts */
HAL_NVIC_EnableIRQ(SDMMC1_IRQn);
/* USER CODE END SDMMC1_MspInit 1 */
}
}
相应的初始化函数：void MX_SDMMC1_SD_Init(void)
{
/* USER CODE BEGIN SDMMC1_Init 0 */
/* USER CODE END SDMMC1_Init 0 */
/* USER CODE BEGIN SDMMC1_Init 1 */
/* USER CODE END SDMMC1_Init 1 */
hsd1.Instance = SDMMC1;
hsd1.Init.ClockEdge = SDMMC_CLOCK_EDGE_FALLING;
hsd1.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;
hsd1.Init.BusWide = SDMMC_BUS_WIDE_4B;
hsd1.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_ENABLE;
hsd1.Init.ClockDiv = 0x02;
if (HAL_SD_Init(&hsd1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SDMMC1_Init 2 */
/* USER CODE END SDMMC1_Init 2 */
}接下来进行读写测试：
static int32_t FS_FileOperations(void)
{
FRESULT res; /* FatFs function common result code */
uint32_t byteswritten, bytesread; /* File write/read counts */
uint8_t rtext; /* File read buffer */
/* Register the file system object to the FatFs module */
if(f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) == FR_OK)
{
/* Create and Open a new text file object with write access */
if(f_open(&SDFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) == FR_OK)
{
/* Write data to the text file */
res = f_write(&SDFile, (const void *)wtext, sizeof(wtext), (void *)&byteswritten);
if((byteswritten > 0) && (res == FR_OK))
{
/* Close the open text file */
f_close(&SDFile);
/* Open the text file object with read access */
if(f_open(&SDFile, "STM32.TXT", FA_READ) == FR_OK)
{
/* Read data from the text file */
res = f_read(&SDFile, ( void *)rtext, sizeof(rtext), (void *)&bytesread);
HAL_UART_Transmit(&huart4, "\r\n", sizeof("\r\n"), 0xffffffff);
HAL_UART_Transmit(&huart4, rtext, strlen(rtext), 0xffffffff);
if((bytesread > 0) && (res == FR_OK))
{
/* Close the open text file */
f_close(&SDFile);
/* Compare read data with the expected data */
if(bytesread == byteswritten)
{
HAL_UART_Transmit(&huart4, "\r\nSuccess of the demo", sizeof("\r\n Success of the demo"), 0xffffffff);
/* Success of the demo: no error occurrence */
return 0;
}
}
}
}
}
}
/* Error */
return -1;
}
实物展示：
测试速度没有？速度可以到多少M？ sd卡的文件系统是用系统自带的么？还是调用库
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