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();
}
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;
}