Question
Guidance Needed for USB Implementation with FreeRTOS on STM32F756ZG
#include "main.h"
#include "fatfs.h"
#include "usart.h"
#include "usb_host.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "ff_gen_drv.h"
#include "usb_host.h"
#include "usbh_diskio.h"
#include <stdint.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define USE_USB_FS // Uncomment for Full-Speed USB
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
FATFS USBDISKFatFs; /* File system object for USB disk logical drive */
FIL MyFile; /* File object */
char USBDISKPath[4]; /* USB Host logical drive path */
USBH_HandleTypeDef hUsbHostFS; /* USB Host handle */
uint64_t count=0;
uint8_t operationCount = 0; /* Track the number of iterations */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_NVIC_Init(void);
void MX_USB_HOST_Process(void);
/* USER CODE BEGIN PFP */
void USB_POWER_SWITCH_ON(void);
void USB_POWER_SWITCH_OFF(void);
void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USB Power Control Functions */
void USB_POWER_SWITCH_ON(void)
{
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_6, GPIO_PIN_SET); // Example pin for VBUS control
printf("VBUS Enabled\n");
}
void USB_POWER_SWITCH_OFF(void)
{
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_6, GPIO_PIN_RESET); // Turn off VBUS power
printf("VBUS Disabled\n");
}
void USBH_UserProcess(USBH_HandleTypeDef *phost, uint8_t id);
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART3_UART_Init();
MX_FATFS_Init();
MX_USB_HOST_Init();
/* Initialize interrupts */
MX_NVIC_Init();
/* USER CODE BEGIN 2 */
/* Power on USB VBUS */
USB_POWER_SWITCH_ON();
// HAL_Delay(200); // Short delay for power stabilization
printf("System Initialized\n");
/* Initialize USB Host */
USBH_Init(&hUsbHostFS, USBH_UserProcess, 0);
USBH_RegisterClass(&hUsbHostFS, USBH_MSC_CLASS);
USBH_Start(&hUsbHostFS);
printf("Logical Drive Path: %s\n", USBDISKPath);
/* Mount the filesystem */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
MX_USB_HOST_Process();
/* USER CODE BEGIN 3 */
count++;
if (f_mount(&USBDISKFatFs, USBDISKPath, 0) == FR_OK)
{
printf("File System Mounted Successfully\n");
/* Create and write to a file */
if (f_open(&MyFile, "SABARI.txt", FA_OPEN_APPEND | FA_WRITE) == FR_OK)
{
const char *data = "HI";
UINT bytesWritten;
printf("File Opened for Writing\n");
if (f_write(&MyFile, data, strlen(data), &bytesWritten) == FR_OK && bytesWritten == strlen(data))
{
printf("File Written Successfully\n");
}
else
{
printf("Failed to Write to File\n");
}
f_close(&MyFile);
}
else
{
printf("Failed to Open File for Writing\n");
}
/* Read from the file */
if (f_open(&MyFile, "SABARI.txt", FA_READ) == FR_OK)
{
char buffer[64];
UINT bytesRead;
printf("File Opened for Reading\n");
if (f_read(&MyFile, buffer, sizeof(buffer) - 1, &bytesRead) == FR_OK)
{
buffer[bytesRead] = '\0'; // Null-terminate string
printf("File Content: %s\n", buffer);
}
else
{
printf("Failed to Read from File\n");
}
f_close(&MyFile);
}
else
{
printf("Failed to Open File for Reading\n");
}
/* Unmount the filesystem */
f_mount(NULL, USBDISKPath, 0);
printf("File System Unmounted\n");
}
else
{
printf("Failed to Mount File System\n");
}
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure LSE Drive Capability
*/
HAL_PWR_EnableBkUpAccess();
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
/** 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_BYPASS;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 72;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 3;
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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief NVIC Configuration.
* @retval None
*/
static void MX_NVIC_Init(void)
{
/* OTG_FS_IRQn interrupt configuration */
HAL_NVIC_SetPriority(OTG_FS_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
}
Hi,
Board- STM32F756ZG , F7 series.
I have successfully implemented USB functionality (mounting, opening, writing to, and unmounting) on an STM32F756ZG microcontroller using the HAL library in a bare-metal environment. However, I am facing difficulties with USB read and write operations when transitioning to a FreeRTOS-based setup.
I would appreciate any guidance or example code on how to correctly implement USB operations (mount, open, write, and unmount) using FreeRTOS, ensuring that the functionality matches my previous bare-metal implementation while utilizing the RTOS for task management. Any assistance would be highly valuable.