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usb bulk transfer

rj j over 12 years ago

Hello Sir,

I am making a receipt printer for point of sale application using LPC2368 controller. I want to use USB interface for receiving data from computer to printer.I am using bulk transfer for data receiving and sending data. I started using Keil USB HID source code example and converted this source code for bulk transfer using following changes in configuration descriptor and few other changes

const UWORD8 USB_ConfigDescriptor[] = {
/* Configuration 1 */
  USB_CONFIGUARTION_DESC_SIZE,       /* bLength */
  USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType */
  WBVAL(                             /* wTotalLength */
    1*USB_CONFIGUARTION_DESC_SIZE +
    1*USB_INTERFACE_DESC_SIZE     +
    2*USB_ENDPOINT_DESC_SIZE
  ),
  0x01,                              /* bNumInterfaces */
  0x01,                              /* bConfigurationValue */
  0x00,                              /* iConfiguration */
  USB_CONFIG_BUS_POWERED /*|*/       /* bmAttributes */
/*USB_CONFIG_REMOTE_WAKEUP*/,
  USB_CONFIG_POWER_MA(100),          /* bMaxPower */
/* Interface 0, Alternate Setting 0, MSC Class */
  USB_INTERFACE_DESC_SIZE,           /* bLength */
  USB_INTERFACE_DESCRIPTOR_TYPE,     /* bDescriptorType */
  0x00,                              /* bInterfaceNumber */
  0x00,                              /* bAlternateSetting */
  0x02,                              /* bNumEndpoints */
  USB_DEVICE_CLASS_PRINTER,          /* bInterfaceClass */
  0x01,                              /* bInterfaceSubClass */
  0x02,                             /* bInterfaceProtocol */
  0x62,                              /* iInterface */
/* Bulk In Endpoint */
  USB_ENDPOINT_DESC_SIZE,            /* bLength */
  USB_ENDPOINT_DESCRIPTOR_TYPE,      /* bDescriptorType */
  USB_ENDPOINT_IN(2),                /* bEndpointAddress */
  USB_ENDPOINT_TYPE_BULK,            /* bmAttributes */
  WBVAL(0x0040),                     /* wMaxPacketSize */
  0,                                 /* bInterval */
/* Bulk Out Endpoint */
  USB_ENDPOINT_DESC_SIZE,            /* bLength */
  USB_ENDPOINT_DESCRIPTOR_TYPE,      /* bDescriptorType */
  USB_ENDPOINT_OUT(2),               /* bEndpointAddress */
  USB_ENDPOINT_TYPE_BULK,            /* bmAttributes */
  WBVAL(0x0040),                     /* wMaxPacketSize */
  0,                                 /* bInterval */
/* Terminator */
  0                                  /* bLength */
};

Computer recognize my board usb device as a USB printing support successfully. I just want to know that is there is any class descriptor like HID class descriptor for printer or not?

And also I want to know that Is there is any host application to check bulk out transfer .

Thanks & Regards
Rohit

Parents

0 Chinzei Tsuneo over 12 years ago in reply to rj j

> I am getting device ID request from PC but not other two request.

Windows put just GET_DEVICE_ID on enumeration.
Try GetPrinter(PRINTER_INFO_2) and ResetPrinter() on Windows app.

> I sent Device ID to PC but when i monitors it on device monitor studio software it is not visible on this software.

Did you start on this example?
C:\Keil\ARM\Boards\Keil\MCB2300\USBHID

        case PRNT_GET_DEVICE_ID:
        EP0Data.pData = (UWORD8 *)&prn_Device_ID;
        EP0Data.Count = prn_Device_ID.size_l + 2;
        USB_DataInStage();
        goto setup_class_ok;                // <-----
        break;

        case PRNT_GET_PORT_STATUS:
        port_status.b = 0;                           // initialize status
        port_status.PRNT_FLAG.prn_not_error   = 1;   // 1 = No Error,    0
        port_status.PRNT_FLAG.prn_select      = 1;
        port_status.PRNT_FLAG.prn_paper_empty = 0;   // 1 = Paper Empty, 0
        EP0Data.pData = (UWORD8 *)&port_status;
        EP0Data.Count = 1;
        USB_DataInStage();
        goto setup_class_ok;                // <-----
        break;

        case PRNT_SOFT_RESET:
        USB_ClrStallEP(0x02);
        USB_ClrStallEP(0x82);
        USB_StatusInStage();                // <-----
        goto setup_class_ok;                // <-----
        break;

Tsuneo

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