gistfile1.txt

//here is descriptors
//needs interrupt endpoint 1 in, bulk endpoint 2 out, bulk endpoint 3 in
//info from pl2303hx datasheet

/* Device Descriptor */
const USB_DEVICE_DESCRIPTOR device_dsc=
{
    0x12,                   // Size of this descriptor in bytes
    USB_DESCRIPTOR_DEVICE,  // DEVICE descriptor type
    0x0200,                 // USB Spec Release Number in BCD format
    0x00,                   // Class Code
    0x00,                   // Subclass code
    0x00,                   // Protocol code
    USB_EP0_BUFF_SIZE,      // Max packet size for EP0, see usb_config.h (8)
    0x0557,                 // Vendor ID: ATEN UC232a
    0x2008,                 // Product ID: ATEN UC232a
    0x0000,                 // Device release number in BCD format
    0x01,                   // Manufacturer string index
    0x02,                   // Product string index
    0x00,                   // Device serial number string index
    0x01                    // Number of possible configurations
};

/* Configuration 1 Descriptor */
const uint8_t configDescriptor1[]={
    /* Configuration Descriptor */
    0x09,//sizeof(USB_CFG_DSC),    // Size of this descriptor in bytes
    USB_DESCRIPTOR_CONFIGURATION,                // CONFIGURATION descriptor type
    DESC_CONFIG_WORD(0x0027),         // Total length of data for this cfg
    1,                      // Number of interfaces in this cfg
    1,                      // Index value of this configuration
    0,                      // Configuration string index
    _DEFAULT,               // Attributes, see usb_device.h
    50,                     // Max power consumption (2X mA)

    /* Interface Descriptor */
    0x09,//sizeof(USB_INTF_DSC),   // Size of this descriptor in bytes
    USB_DESCRIPTOR_INTERFACE,               // INTERFACE descriptor type
    0,                      // Interface Number
    0,                      // Alternate Setting Number
    3,                      // Number of endpoints in this intf
    0xFF,                   // Class code
    0xFF,                   // Subclass code
    0xFF,                   // Protocol code
    0,                      // Interface string index

    /* Endpoint Descriptor */
    0x07,                       /*sizeof(USB_EP_DSC)*/
    USB_DESCRIPTOR_ENDPOINT,    //Endpoint Descriptor
    _EP01_IN,                   //EndpointAddress
    _INTERRUPT,                       //Attributes
    DESC_CONFIG_WORD(USBGEN_INT_SIZE),        //size
    64,                          //Interval
    
    0x07,                       /*sizeof(USB_EP_DSC)*/
    USB_DESCRIPTOR_ENDPOINT,    //Endpoint Descriptor
    _EP02_OUT,                  //EndpointAddress
    _BULK,                       //Attributes
    DESC_CONFIG_WORD(USBGEN_EP_SIZE),        //size
    0,                         //Interval

    0x07,                       /*sizeof(USB_EP_DSC)*/
    USB_DESCRIPTOR_ENDPOINT,    //Endpoint Descriptor
    _EP03_IN,                   //EndpointAddress
    _BULK,                       //Attributes
    DESC_CONFIG_WORD(USBGEN_EP_SIZE),        //size
    0,                          //Interval
};


//checking vendor requests not standard

void USBCheckVendorRequest(void)
{
    //cvm - defines from pl2303.c in linux kernel
    #define SET_LINE_REQUEST_TYPE       0x21
    #define SET_LINE_REQUEST            0x20
    #define SET_LINE ((SET_LINE_REQUEST_TYPE<<8) + SET_LINE_REQUEST)

    #define SET_CONTROL_REQUEST_TYPE    0x21
    #define SET_CONTROL_REQUEST         0x22
    #define SET_CONTROL ((SET_CONTROL_REQUEST_TYPE<<8) + SET_CONTROL_REQUEST)

    #define BREAK_REQUEST_TYPE          0x21
    #define BREAK_REQUEST               0x23
    #define BREAK ((BREAK_REQUEST_TYPE<<8) + BREAK_REQUEST)

    #define GET_LINE_REQUEST_TYPE       0xa1
    #define GET_LINE_REQUEST            0x21
    #define GET_LINE ((GET_LINE_REQUEST_TYPE<<8) + GET_LINE_REQUEST)

    #define VENDOR_WRITE_REQUEST_TYPE   0x40
    #define VENDOR_WRITE_REQUEST        0x01
    #define VENDOR_WRITE ((VENDOR_WRITE_REQUEST_TYPE<<8) + VENDOR_WRITE_REQUEST)

    #define VENDOR_READ_REQUEST_TYPE    0xc0
    #define VENDOR_READ_REQUEST         0x01
    #define VENDOR_READ ((VENDOR_READ_REQUEST_TYPE<<8) + VENDOR_READ_REQUEST)

    extern struct {uint32_t; uint8_t; uint8_t; uint8_t;} line_settings;
    extern void set_line();
    
    //combine request type and request for checking below
    uint16_t req = (SetupPkt.bmRequestType<<8) + SetupPkt.bRequest; 
    
    if( req == VENDOR_READ )
    {
        extern uint8_t CtrlTrfData[USB_EP0_BUFF_SIZE];
        CtrlTrfData[0] = 0;
        USBEP0SendRAMPtr(CtrlTrfData,1,USB_EP0_RAM); //just send 0
    }
    if( req == VENDOR_WRITE || req == SET_CONTROL || req == BREAK )
    {
        USBEP0SendRAMPtr(NULL,0,USB_EP0_NO_DATA); //
    }
    //line settings (referred to as uint8_t buf[] below)
    /* For reference buf[0]:buf[3] baud rate value */
    /* For reference buf[4]=stop bits 0=1,1=1.5,2=2 */
    /* For reference buf[5]=parity 0=none,1=odd,2=even,3=mark,4=space  */
    /* buf[6]=data size bits 5,6,7,8 */
    if( req == GET_LINE )
    {
        USBEP0SendRAMPtr((uint8_t*)&line_settings,7,USB_EP0_RAM); //send my line settings
    }
    if( req == SET_LINE )
    {
        USBEP0Receive((uint8_t*)&line_settings,7,set_line); //get data, call set line
        //set line only used when debug output to serial
        //(can also just receive and ignore- if serial not used or debug serial used
        //and want to just use our own line settings that cannot be changed)
    }
}