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usb problem

Question asked by marwa.mohamad on Feb 5, 2013
Latest reply on Feb 7, 2013 by qubas
Dear All,

I have a problem in usb driver. I want stml152 kit is seen by host as a keyboard. Now it has been read as a keyboard and sent a letter. But my problem now that it sent a letter contiously. I don't know why.

This my code


/* USB Standard Device Descriptor */
unsigned char InReport[]={0,0,4,0,0,0,0,0};
const uint8_t KeyBoard_DeviceDescriptor[KEYBOARD_SIZ_DEVICE_DESC] =
  {
    0x12,                       /*bLength */
    USB_DEVICE_DESCRIPTOR_TYPE, /*bDescriptorType*/
    0x00,                       /*bcdUSB */
    0x02,
    0x00,                       /*bDeviceClass*/
    0x00,                       /*bDeviceSubClass*/
    0x00,                       /*bDeviceProtocol*/
    0x40,                       /*bMaxPacketSize 64*/
    0x83,                       /*idVendor (0x0483)*/
    0x04,
    0x10,                       /*idProduct = 0x5710*/
    0x57,
    0x00,                       /*bcdDevice rel. 2.00*/
    0x02,
    1,                          /*Index of string descriptor describing
                                                  manufacturer */
    2,                          /*Index of string descriptor describing
                                                 product*/
    3,                          /*Index of string descriptor describing the
                                                 device serial number */
    0x01                        /*bNumConfigurations*/
  }
  ; /* KeyBoard_DeviceDescriptor */




/* USB Configuration Descriptor */
/*   All Descriptors (Configuration, Interface, Endpoint, Class, Vendor */
const uint8_t KeyBoard_ConfigDescriptor[KEYBOARD_SIZ_CONFIG_DESC] =
  {
    0x09, /* bLength: Configuration Descriptor size */
    USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
    KEYBOARD_SIZ_CONFIG_DESC,
    /* wTotalLength: Bytes returned */
    0x00,
    0x01,         /*bNumInterfaces: 1 interface*/
    0x01,         /*bConfigurationValue: Configuration value*/
    0x00,         /*iConfiguration: Index of string descriptor describing
                                     the configuration*/
    0xA0,         /*bmAttributes: bus powered */
    0x32,         /*MaxPower 100 mA: this current is used for detecting Vbus*/


    /************** Descriptor of Joystick Mouse interface ****************/
    /* 09 */
    0x09,         /*bLength: Interface Descriptor size*/
    USB_INTERFACE_DESCRIPTOR_TYPE,/*bDescriptorType: Interface descriptor type*/
    0x00,         /*bInterfaceNumber: Number of Interface*/
    0x00,         /*bAlternateSetting: Alternate setting*/
    0x01,         /*bNumEndpoints*/
    0x03,         /*bInterfaceClass: HID*/
    0x01,         /*bInterfaceSubClass : 1=BOOT, 0=no boot*/
    0x01,         /*nInterfaceProtocol : 0=none, 1=keyboard, 2=mouse*/
    0,            /*iInterface: Index of string descriptor*/
    /******************** Descriptor of Joystick Mouse HID ********************/
    /* 18 */
    0x09,         /*bLength: HID Descriptor size*/
    HID_DESCRIPTOR_TYPE, /*bDescriptorType: HID*/
    0x01,         /*bcdHID: HID Class Spec release number*/
    0x01,
    0x00,         /*bCountryCode: Hardware target country*/
    0x01,         /*bNumDescriptors: Number of HID class descriptors to follow*/
    0x22,         /*bDescriptorType*/
    KEYBOARD_SIZ_REPORT_DESC,/*wItemLength: Total length of Report descriptor*/
    0x00,
    /******************** Descriptor of Joystick Mouse endpoint ********************/
    /* 27 */
    0x07,          /*bLength: Endpoint Descriptor size*/
    USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/


    0x81,          /*bEndpointAddress: Endpoint Address (IN)*/
    0x03,          /*bmAttributes: Interrupt endpoint*/
    0x08,          /*wMaxPacketSize: 4 Byte max */
    0x00,
    0x0A,          /*bInterval: Polling Interval (32 ms)*/
    /* 34 */
  }
  ; /* MOUSE_ConfigDescriptor */
const uint8_t KeyBoard_ReportDescriptor[KEYBOARD_SIZ_REPORT_DESC] =
  {
     0x05, 0x01,                    // USAGE_PAGE (Generic Desktop)
    0x09, 0x06,                    // USAGE (Keyboard)
    0xa1, 0x01,                    // COLLECTION (Application)
    0x05, 0x07,                    //   USAGE_PAGE (Keyboard)
    0x19, 0xe0,                    //   USAGE_MINIMUM (Keyboard LeftControl)
    0x29, 0xe7,                    //   USAGE_MAXIMUM (Keyboard Right GUI)
    0x15, 0x00,                    //   LOGICAL_MINIMUM (0)
    0x25, 0x01,                    //   LOGICAL_MAXIMUM (1)
    0x75, 0x01,                    //   REPORT_SIZE (1)
    0x95, 0x08,                    //   REPORT_COUNT (8)
    0x81, 0x02,                    //   INPUT (Data,Var,Abs)
    0x95, 0x01,                    //   REPORT_COUNT (1)
    0x75, 0x08,                    //   REPORT_SIZE (8)
    0x81, 0x03,                    //   INPUT (Cnst,Var,Abs)
    0x95, 0x05,                    //   REPORT_COUNT (5)
    0x75, 0x01,                    //   REPORT_SIZE (1)
    0x05, 0x08,                    //   USAGE_PAGE (LEDs)
    0x19, 0x01,                    //   USAGE_MINIMUM (Num Lock)
    0x29, 0x05,                    //   USAGE_MAXIMUM (Kana)
    0x91, 0x02,                    //   OUTPUT (Data,Var,Abs)
    0x95, 0x01,                    //   REPORT_COUNT (1)
    0x75, 0x03,                    //   REPORT_SIZE (3)
    0x91, 0x03,                    //   OUTPUT (Cnst,Var,Abs)
    0x95, 0x06,                    //   REPORT_COUNT (6)
    0x75, 0x08,                    //   REPORT_SIZE (8)
    0x15, 0x00,                    //   LOGICAL_MINIMUM (0)
    0x25, 0x65,                    //   LOGICAL_MAXIMUM (101)
    0x05, 0x07,                    //   USAGE_PAGE (Keyboard)
    0x19, 0x00,                    //   USAGE_MINIMUM (Reserved (no event indicated))
    0x29, 0x65,                    //   USAGE_MAXIMUM (Keyboard Application)
    0x81, 0x00,                    //   INPUT (Data,Ary,Abs)
    0xc0                                   // END_COLLECTION
  }
  ; /* KeyBoard_ReportDescriptor */


/* USB String Descriptors (optional) */
const uint8_t KeyBoard_StringLangID[KEYBOARD_SIZ_STRING_LANGID] =
  {
    KEYBOARD_SIZ_STRING_LANGID,
    USB_STRING_DESCRIPTOR_TYPE,
    0x09,
    0x00
  }
  ; /* LangID = 0x0409: U.S. English */


const uint8_t KeyBoard_StringVendor[KEYBOARD_SIZ_STRING_VENDOR] =
  {
    KEYBOARD_SIZ_STRING_VENDOR, /* Size of Vendor string */
    USB_STRING_DESCRIPTOR_TYPE,  /* bDescriptorType*/
    /* Manufacturer: "STMicroelectronics" */
    'A', 0, 'C', 0, 'M', 0, 'E', 0
  };


const uint8_t KeyBoard_StringProduct[KEYBOARD_SIZ_STRING_PRODUCT] =
  {
    KEYBOARD_SIZ_STRING_PRODUCT,          /* bLength */
    USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
    'S', 0, 'T', 0, 'M', 0, '3', 0, '2', 0, ' ', 0, 'K', 0,
    'E', 0, 'y', 0, 'B', 0, 'O', 0, 'A', 0, 'R', 0, 'D', 0
  };
uint8_t KeyBoard_StringSerial[KEYBOARD_SIZ_STRING_SERIAL] =
  {
    KEYBOARD_SIZ_STRING_SERIAL,           /* bLength */
    USB_STRING_DESCRIPTOR_TYPE,        /* bDescriptorType */
    'S', 0, 'T', 0, 'M', 0, '3', 0, '2', 0, '1', 0
  };

also I used 
 USB_SIL_Write(EP1_IN, KeyBoard_Buffer, 8);

static uint8_t KeyBoard_Buffer[8]={0,0,4,0,0,0,0,0};

My question is what does this array mean? I know 4 is letter A or a but i don't know other array fields.

Thanks



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