PROGRaming use of 2do usb in nucleo.h7

[yogui_ricardo]

I want to use the second USB of my nucleo-h753zi board, in a program that checks and graphs the movements and clicks of the mouse that enters through the USB port, but I only see the stlink, there is the init = MX_USB_DEVICE_Init (void);  I used the power in "ext" and in "chgr" but without result.  What am I missing or what am I doing wrong? Thanks

[gbm]

Middleware - USB device - select a proper class (CDC?) and write some code to handle the transfers.

[yogui_ricardo]

yes;That is contemplated:

void SendMessageToPC(char* message) {

CDC_Transmit_FS((uint8_t*)message, strlen(message));

}

void SendMovementData(int x, int y, uint8_t buttons) {

char buffer[50]; // Buffer para el mensaje

// Formatear el mensaje

sprintf(buffer, "Mov: X=%d, Y=%d, Buttons=%d\r\n", x, y, buttons);

// Enviar el mensaje al PC

CDC_Transmit_FS((uint8_t*)buffer, strlen(buffer));

}

void ProcessMovement() {

HID_ReportTypeDef report = {0, 0, 0}; // Inicializa el reporte

report.buttons = 1; // Emular clic en el botón 1

report.x = 5; // Desplazamiento en X

report.y = 0; // Desplazamiento en Y

USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*)&report, sizeof(report));

// Envía la información de movimiento por USB Serial

SendMovementData(report.x, report.y, report.buttons);

HAL_Delay(10); // Pausa para evitar sobrecarga de reportes

}

[FBL · Accepted solution]

Hi @yogui_ricardo 

You need HID class instead of CDC to interface a mouse. Here is a working example to start with on eval board  STM32CubeH7/Projects/STM32H743I-EVAL/Applications/USB_Device/HID_Standalone at master · STMicroelectronics/STM32CubeH7 · GitHub You need to refer to schematics as well.