Пример #1
0
void usb_handle_setup(void) {
    rbdp->BDSTAT = DTSEN; // Reclaim reply buffer
    switch (bdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_TypeMask) {
        case USB_bmRequestType_Standard:
            switch (bdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_RecipientMask) {
                case USB_bmRequestType_Device:
                    usb_handle_StandardDeviceRequest(bdp);
                    break;
                case USB_bmRequestType_Interface:
                    usb_handle_StandardInterfaceRequest(bdp);
                    break;
                case USB_bmRequestType_Endpoint:
                    usb_handle_StandardEndpointRequest(bdp);
                    break;
                default:
                    usb_RequestError();
            }
            break;
        case USB_bmRequestType_Class:
            if (class_setup_handler) class_setup_handler();
            break;
        case USB_bmRequestType_Vendor:
            if (vendor_setup_handler) class_setup_handler();
            break;
        default:
            usb_RequestError();
    }
    /* Prepare endpoint for new reception */

    bdp->BDCNT = USB_EP0_BUFFER_SIZE; // Size  of EP0, should always be ep0? (JTR in practice YES)

    // JTR, is the next OUT transfer to be a setup packet (DAT0) or a DATA packet (DAT1)?
    // note that this is not an entirely robust way of doing things. See the microchip stack for
    // further comments and a better system as this does not account for errors and retries.

    // JTR Breakdown of what is happening here FYI.

    //bdp->BDSTAT = (!(bdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_PhaseMask) &&
    // JTR meaning. If transfer was a CONTROL OUT then B7 (USB_bmRequestType_PhaseMask) of bmRequestType is '0'

    // &&

    //bdp->BDADDR[USB_wLength] || bdp->BDADDR[USB_wLengthHigh]))? UOWN + DTS + DTSEN : UOWN + DTSEN;
    // If there is a CONTROL OUT DATA PACKET to follow then its count in (int) wLength will be != 0
    // When both conditions are true then set for DAT1 (UOWN + DTS + DTSEN)
    // else set for DAT0 (UOWN + DTSEN)

    // See USB 2.0 spec 8.5.3

    bdp->BDSTAT = (!(bdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_PhaseMask) &&
            (bdp->BDADDR[USB_wLength] || bdp->BDADDR[USB_wLengthHigh])) ? UOWN + DTS + DTSEN : UOWN + DTSEN;

    // JTR Note. For rbdp after a setup packet, the standard or class request handler will force the correct DTS state
    // JTR Note. that CONTROL IN and OUT DATA packet transfers do not come back here and there is no
    // univesal way and place of setting up EP0 after these DATA transfers in this stack.

    // JTR Note. that there is a PIC18 silicon errata issue that this does not address by being here.  See DS80220F-page 6
    EnablePacketTransfer();
}
Пример #2
0
void usb_handle_setup(void) {

    EP0_Inbdp->BDSTAT = DTSEN; // Reclaim reply buffer

    EnablePacketTransfer(); // JTR this is placed here to overcome a errate issue with early PIC18 USB pics.

    switch (EP0_Outbdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_TypeMask) {
        case USB_bmRequestType_Standard:
            switch (EP0_Outbdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_RecipientMask) {
                case USB_bmRequestType_Device:
                    usb_handle_StandardDeviceRequest(EP0_Outbdp);
                    break;
                case USB_bmRequestType_Interface:
                    usb_handle_StandardInterfaceRequest(EP0_Outbdp);
                    break;
                case USB_bmRequestType_Endpoint:
                    usb_handle_StandardEndpointRequest(EP0_Outbdp);
                    break;
                default:
                    usb_RequestError();
            }
            break;
        case USB_bmRequestType_Class:
            if (class_setup_handler) class_setup_handler();
            break;
        case USB_bmRequestType_Vendor:
			//ROBOTS FIX: http://dangerousprototypes.com/forum/viewtopic.php?f=39&t=3849&view=unread#unread
			// did call class_setup_handler();
            if (vendor_setup_handler) vendor_setup_handler();
            break;
        default:
            usb_RequestError();
    }
    /* Prepare endpoint for new reception */

    EP0_Outbdp->BDCNT = USB_EP0_BUFFER_SIZE; // Size  of EP0, should always be ep0?

    // JTR, is the next OUT transfer to be a setup packet (DAT0) or a DATA packet (DAT1)?
    // note that this is not an entirely robust way of doing things. See the microchip stack for
    // further comments and a better system as this does not account for errors and retries
    // and it results in the SIE not accepting the final out ZLP status packet for IN transfers
    // with a data stage. However it works but it is not anything to be proud of...

    EP0_Outbdp->BDSTAT = (!(EP0_Outbdp->BDADDR[USB_bmRequestType] & USB_bmRequestType_PhaseMask) &&
            (EP0_Outbdp->BDADDR[USB_wLength] || EP0_Outbdp->BDADDR[USB_wLengthHigh])) ? UOWN + DTS + DTSEN : UOWN + DTSEN;
}