Hi,

I try to set the AT91RM9200 USB as a printer device. I want that linux recognize it as a printer even if I have not developed a printer driver (PPD-CUPS) until now.

I face some difficulties to define the (deviceDescriptor-deviceID). Is there some examples that could point me to the correct way??


char deviceDescriptor[] = {
/* Device descriptor */
0x12, // bLength
0x01, // bDescriptorType
0x00, // bcdUSBL
0x02, //
0x00, // bDeviceClass: CDC class code // 7 ---> Printer
0x00, // bDeviceSubclass: CDC class sub code
0x00, // bDeviceProtocol: CDC Device protocol
0x08, // bMaxPacketSize0
0xEB, // idVendorL
0x03, //
0x28, // idProductL
0x61, //
0x10, // bcdDeviceL
0x01, //
0x00, // iManufacturer //0x00
0x00, // iProduct
0x00, // SerialNumber
0x01 // bNumConfigs
};


char configurationDescriptor[] = {
/* ============== CONFIGURATION 1 =========== */
/* Configuration 1 descriptor */
0x09, // CbLength
0x02, // CbDescriptorType
0x20, // CwTotalLength 2 EP + Control
0x00,
0x01, // CbNumInterfaces
0x01, // CbConfigurationValue
0x00, // CiConfiguration
0xC0, // CbmAttributes 0xA0
0x00, // CMaxPower

/* Communication Class Interface Descriptor Requirement */
0x09, // bLength
0x04, // bDescriptorType
0x00, // bInterfaceNumber
0x00, // bAlternateSetting
0x02, // bNumEndpoints
0x07, // bInterfaceClass -----> 7 Printer
0x01, // bInterfaceSubclass
0x02, // bInterfaceProtocol
0x00, // iInterface

/* First alternate setting */
/* Endpoint 1 descriptor */
0x07, // bLength
0x05, // bDescriptorType
0x01, // bEndpointAddress, Endpoint 01 - OUT
0x02, // bmAttributes BULK
0x40, // wMaxPacketSize
0x00,
0x00, // bInterval

/* Endpoint 2 descriptor */
0x07, // bLength
0x05, // bDescriptorType
0x82, // bEndpointAddress, Endpoint 02 - IN
0x02, // bmAttributes BULK
0x40, // wMaxPacketSize
0x00,
0x00 // bInterval
};


Thank you,

Coincoin