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Usb Hosting Error on STM32F429

Mehdi zemzem

Hello Everyone,
I'm following these steps ( www2.keil.com/.../ ) in order to understand USB Hosting and create my own application. Unfortunately i encountered a problem. I arrived at Step 3 and i added the Host support correctly but i can't access the usb stick. When i debug the USBH_MSC_DriveMount function , i found that wether the actual usb stick is connected or not , the finit function returns fsDriverError. I checked on Documentation and found out that it means it failed to initialize the drive but i couldn't find a way how to fix it or what it actually means.
I'll be glad if you could help me solve my problem and thank you .

I'm using STM32F429

Parents
  • 0 in reply to re yoReinhard Keil

    Hello again,
    I Rechecked the Over Current Pin and the Power On/Off , they are both assigned correctly. If there's another group of pins that i have to check please let me know.

    This is my code

     void Thread (void const *argument)
         { static int result;
                 static FILE *f;
                 stats = USBH_Initialize (0);
                 while (1) {
                         result = USBH_MSC_DriveMount ("U0:");
         if (result == USBH_MSC_OK)
         { f = fopen ("Test.txt", "r");
         if (f) { fread (fbuf, sizeof (fbuf), 1, f);
         fclose (f);
         } }
         osDelay (1000);
         } }

    The USBH_Initialize (0) returns usbOk
    The USBH_MSC_DriveMount ("U0:") returns -1 (USBH_MSC_ERROR)
    Debugging the USBH_MSC_DriveMount ("U0:") shows that the finit function shows that it returns fsDriverError

    I didn't find a way to access the finit function but
    I checked the returns on both ARM_USBH_Initialize and ARM_USBH_PowerControl by checking register value at the end of the function. Both functions return ARM_DRIVER_OK.

    I hope this gives you a better idea on what the problem is and thank you for your time

Reply
  • 0 in reply to re yoReinhard Keil

    Hello again,
    I Rechecked the Over Current Pin and the Power On/Off , they are both assigned correctly. If there's another group of pins that i have to check please let me know.

    This is my code

     void Thread (void const *argument)
         { static int result;
                 static FILE *f;
                 stats = USBH_Initialize (0);
                 while (1) {
                         result = USBH_MSC_DriveMount ("U0:");
         if (result == USBH_MSC_OK)
         { f = fopen ("Test.txt", "r");
         if (f) { fread (fbuf, sizeof (fbuf), 1, f);
         fclose (f);
         } }
         osDelay (1000);
         } }

    The USBH_Initialize (0) returns usbOk
    The USBH_MSC_DriveMount ("U0:") returns -1 (USBH_MSC_ERROR)
    Debugging the USBH_MSC_DriveMount ("U0:") shows that the finit function shows that it returns fsDriverError

    I didn't find a way to access the finit function but
    I checked the returns on both ARM_USBH_Initialize and ARM_USBH_PowerControl by checking register value at the end of the function. Both functions return ARM_DRIVER_OK.

    I hope this gives you a better idea on what the problem is and thank you for your time

Children