/********************************************************************
Function:
void USBCheckHIDRequest(void)
Summary:
This routine handles HID specific request that happen on EP0.
This function should be called from the USBCBCheckOtherReq() call back
function whenever implementing a HID device.
Description:
This routine handles HID specific request that happen on EP0. These
include, but are not limited to, requests for the HID report
descriptors. This function should be called from the
USBCBCheckOtherReq() call back function whenever using an HID device.
Typical Usage:
<code>
void USBCBCheckOtherReq(void)
{
//Since the stack didn't handle the request I need to check
// my class drivers to see if it is for them
USBCheckHIDRequest();
}
</code>
PreCondition:
None
Parameters:
None
Return Values:
None
Remarks:
None
*******************************************************************/
void USBCheckHIDRequest(void)
{
if(SetupPkt.Recipient != USB_SETUP_RECIPIENT_INTERFACE_BITFIELD) return;
if(SetupPkt.bIntfID != HID_INTF_ID) return;
/*
* There are two standard requests that hid.c may support.
* 1. GET_DSC(DSC_HID,DSC_RPT,DSC_PHY);
* 2. SET_DSC(DSC_HID,DSC_RPT,DSC_PHY);
*/
if(SetupPkt.bRequest == USB_REQUEST_GET_DESCRIPTOR)
{
switch(SetupPkt.bDescriptorType)
{
case DSC_HID:
if(USBActiveConfiguration == 1)
{
USBEP0SendROMPtr(
(ROM BYTE*)&configDescriptor1 + 18,
sizeof(USB_HID_DSC)+3,
USB_EP0_INCLUDE_ZERO);
}
break;
case DSC_RPT:
if(USBActiveConfiguration == 1)
{
USBEP0SendROMPtr(
(ROM BYTE*)&hid_rpt01,
sizeof(hid_rpt01), //See usbcfg.h
USB_EP0_INCLUDE_ZERO);
}
break;
case DSC_PHY:
USBEP0Transmit(USB_EP0_NO_DATA);
break;
}//end switch(SetupPkt.bDescriptorType)
}//end if(SetupPkt.bRequest == GET_DSC)
if(SetupPkt.RequestType != USB_SETUP_TYPE_CLASS_BITFIELD)
{
return;
}
switch(SetupPkt.bRequest)
{
case GET_REPORT:
#if defined USER_GET_REPORT_HANDLER
USER_GET_REPORT_HANDLER();
#endif
break;
case SET_REPORT:
#if defined USER_SET_REPORT_HANDLER
USER_SET_REPORT_HANDLER();
#endif
break;
case GET_IDLE:
USBEP0SendRAMPtr(
(BYTE*)&idle_rate,
1,
USB_EP0_INCLUDE_ZERO);
break;
case SET_IDLE:
USBEP0Transmit(USB_EP0_NO_DATA);
idle_rate = SetupPkt.W_Value.byte.HB;
break;
case GET_PROTOCOL:
USBEP0SendRAMPtr(
(BYTE*)&active_protocol,
1,
USB_EP0_NO_OPTIONS);
break;
case SET_PROTOCOL:
USBEP0Transmit(USB_EP0_NO_DATA);
active_protocol = SetupPkt.W_Value.byte.LB;
break;
}//end switch(SetupPkt.bRequest)
}//end USBCheckHIDRequest
/********************************************************************
Function:
void USBCheckHIDRequest(void)
Summary:
This routine handles HID specific request that happen on EP0.
This function should be called from the USBCBCheckOtherReq() call back
function whenever implementing a HID device.
Description:
This routine handles HID specific request that happen on EP0. These
include, but are not limited to, requests for the HID report
descriptors. This function should be called from the
USBCBCheckOtherReq() call back function whenever using an HID device.
Typical Usage:
<code>
void USBCBCheckOtherReq(void)
{
//Since the stack didn't handle the request I need to check
// my class drivers to see if it is for them
USBCheckHIDRequest();
}
</code>
PreCondition:
None
Parameters:
None
Return Values:
None
Remarks:
None
*******************************************************************/
void USBCheckHIDRequest(void)
{
if(SetupPkt.Recipient != USB_SETUP_RECIPIENT_INTERFACE_BITFIELD) return;
if(SetupPkt.bIntfID != HID_INTF_ID) return;
/*
* There are two standard requests that hid.c may support.
* 1. GET_DSC(DSC_HID,DSC_RPT,DSC_PHY);
* 2. SET_DSC(DSC_HID,DSC_RPT,DSC_PHY);
*/
if(SetupPkt.bRequest == USB_REQUEST_GET_DESCRIPTOR)
{
switch(SetupPkt.bDescriptorType)
{
case DSC_HID: //HID Descriptor
if(USBActiveConfiguration == 1)
{
USBEP0SendROMPtr(
(ROM BYTE*)&configDescriptor1 + 18, //18 is a magic number. It is the offset from start of the configuration descriptor to the start of the HID descriptor.
sizeof(USB_HID_DSC)+3,
USB_EP0_INCLUDE_ZERO);
}
break;
case DSC_RPT: //Report Descriptor
//if(USBActiveConfiguration == 1)
{
USBEP0SendROMPtr(
(ROM BYTE*)&hid_rpt01,
HID_RPT01_SIZE, //See usbcfg.h
USB_EP0_INCLUDE_ZERO);
}
break;
case DSC_PHY: //Physical Descriptor
//Note: The below placeholder code is commented out. HID Physical Descriptors are optional and are not used
//in many types of HID applications. If an application does not have a physical descriptor,
//then the device should return STALL in response to this request (stack will do this automatically
//if no-one claims ownership of the control transfer).
//If an application does implement a physical descriptor, then make sure to declare
//hid_phy01 (rom structure containing the descriptor data), and hid_phy01 (the size of the descriptors in bytes),
//and then uncomment the below code.
//if(USBActiveConfiguration == 1)
//{
// USBEP0SendROMPtr((ROM BYTE*)&hid_phy01, sizeof(hid_phy01), USB_EP0_INCLUDE_ZERO);
//}
break;
}//end switch(SetupPkt.bDescriptorType)
}//end if(SetupPkt.bRequest == GET_DSC)
if(SetupPkt.RequestType != USB_SETUP_TYPE_CLASS_BITFIELD)
{
return;
}
switch(SetupPkt.bRequest)
{
case GET_REPORT:
#if defined USER_GET_REPORT_HANDLER
USER_GET_REPORT_HANDLER();
#endif
break;
case SET_REPORT:
#if defined USER_SET_REPORT_HANDLER
USER_SET_REPORT_HANDLER();
#endif
break;
case GET_IDLE:
USBEP0SendRAMPtr(
(BYTE*)&idle_rate,
1,
USB_EP0_INCLUDE_ZERO);
break;
case SET_IDLE:
USBEP0Transmit(USB_EP0_NO_DATA);
idle_rate = SetupPkt.W_Value.byte.HB;
break;
case GET_PROTOCOL:
USBEP0SendRAMPtr(
(BYTE*)&active_protocol,
1,
USB_EP0_NO_OPTIONS);
break;
case SET_PROTOCOL:
USBEP0Transmit(USB_EP0_NO_DATA);
active_protocol = SetupPkt.W_Value.byte.LB;
break;
}//end switch(SetupPkt.bRequest)
}//end USBCheckHIDRequest