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17 results

HID.c

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    • Dean Camera's avatar
      899df7d3
      Renamed all low level Endpoint_Read_*, Endpoint_Write_* and Endpoint_Discard_*... · 899df7d3
      Dean Camera authored
      Renamed all low level Endpoint_Read_*, Endpoint_Write_* and Endpoint_Discard_* functions to use the number of bits instead of a symbolic size (Byte, Word, DWord) so that the function names are applicable and correct across all architectures.
      
      Renamed all low level Pipe_Read_*, Pipe_Write_* and Pipe_Discard_* functions to use the number of bits instead of a symbolic size (Byte, Word, DWord) so that the function names are applicable and correct across all architectures.
      899df7d3
      History
      Renamed all low level Endpoint_Read_*, Endpoint_Write_* and Endpoint_Discard_*...
      Dean Camera authored
      Renamed all low level Endpoint_Read_*, Endpoint_Write_* and Endpoint_Discard_* functions to use the number of bits instead of a symbolic size (Byte, Word, DWord) so that the function names are applicable and correct across all architectures.
      
      Renamed all low level Pipe_Read_*, Pipe_Write_* and Pipe_Discard_* functions to use the number of bits instead of a symbolic size (Byte, Word, DWord) so that the function names are applicable and correct across all architectures.
    HID.c 6.32 KiB
    /*
                 LUFA Library
         Copyright (C) Dean Camera, 2011.
    
      dean [at] fourwalledcubicle [dot] com
               www.lufa-lib.org
    */
    
    /*
      Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
    
      Permission to use, copy, modify, distribute, and sell this
      software and its documentation for any purpose is hereby granted
      without fee, provided that the above copyright notice appear in
      all copies and that both that the copyright notice and this
      permission notice and warranty disclaimer appear in supporting
      documentation, and that the name of the author not be used in
      advertising or publicity pertaining to distribution of the
      software without specific, written prior permission.
    
      The author disclaim all warranties with regard to this
      software, including all implied warranties of merchantability
      and fitness.  In no event shall the author be liable for any
      special, indirect or consequential damages or any damages
      whatsoever resulting from loss of use, data or profits, whether
      in an action of contract, negligence or other tortious action,
      arising out of or in connection with the use or performance of
      this software.
    */
    
    #define  __INCLUDE_FROM_USB_DRIVER
    #include "../../Core/USBMode.h"
    
    #if defined(USB_CAN_BE_DEVICE)
    
    #define  __INCLUDE_FROM_HID_DRIVER
    #define  __INCLUDE_FROM_HID_DEVICE_C
    #include "HID.h"
    
    void HID_Device_ProcessControlRequest(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
    {
    	if (!(Endpoint_IsSETUPReceived()))
    	  return;
    
    	if (USB_ControlRequest.wIndex != HIDInterfaceInfo->Config.InterfaceNumber)
    	  return;
    
    	switch (USB_ControlRequest.bRequest)
    	{
    		case HID_REQ_GetReport:
    			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
    			{
    				uint16_t ReportSize = 0;
    				uint8_t  ReportID   = (USB_ControlRequest.wValue & 0xFF);
    				uint8_t  ReportType = (USB_ControlRequest.wValue >> 8) - 1;
    				uint8_t  ReportData[HIDInterfaceInfo->Config.PrevReportINBufferSize];
    
    				memset(ReportData, 0, sizeof(ReportData));
    
    				CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, ReportType, ReportData, &ReportSize);
    
    				if (HIDInterfaceInfo->Config.PrevReportINBuffer != NULL)
    				{
    					memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportData,
    					       HIDInterfaceInfo->Config.PrevReportINBufferSize);
    				}
    				
    				Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
    
    				Endpoint_ClearSETUP();
    				Endpoint_Write_Control_Stream_LE(ReportData, ReportSize);
    				Endpoint_ClearOUT();
    			}
    
    			break;
    		case HID_REQ_SetReport:
    			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
    			{
    				uint16_t ReportSize = USB_ControlRequest.wLength;
    				uint8_t  ReportID   = (USB_ControlRequest.wValue & 0xFF);
    				uint8_t  ReportType = (USB_ControlRequest.wValue >> 8) - 1;
    				uint8_t  ReportData[ReportSize];
    
    				Endpoint_ClearSETUP();
    				Endpoint_Read_Control_Stream_LE(ReportData, ReportSize);
    				Endpoint_ClearIN();
    				
    				CALLBACK_HID_Device_ProcessHIDReport(HIDInterfaceInfo, ReportID, ReportType,
    				                                     &ReportData[ReportID ? 1 : 0], ReportSize - (ReportID ? 1 : 0));
    			}
    
    			break;
    		case HID_REQ_GetProtocol:
    			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
    			{
    				Endpoint_ClearSETUP();
    				Endpoint_Write_8(HIDInterfaceInfo->State.UsingReportProtocol);
    				Endpoint_ClearIN();
    				Endpoint_ClearStatusStage();
    			}
    
    			break;
    		case HID_REQ_SetProtocol:
    			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
    			{
    				Endpoint_ClearSETUP();
    				Endpoint_ClearStatusStage();
    
    				HIDInterfaceInfo->State.UsingReportProtocol = ((USB_ControlRequest.wValue & 0xFF) != 0x00);
    			}
    
    			break;
    		case HID_REQ_SetIdle:
    			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
    			{
    				Endpoint_ClearSETUP();
    				Endpoint_ClearStatusStage();
    
    				HIDInterfaceInfo->State.IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6);
    			}
    
    			break;
    		case HID_REQ_GetIdle:
    			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
    			{
    				Endpoint_ClearSETUP();
    				Endpoint_Write_8(HIDInterfaceInfo->State.IdleCount >> 2);
    				Endpoint_ClearIN();
    				Endpoint_ClearStatusStage();
    			}
    
    			break;
    	}
    }
    
    bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
    {
    	memset(&HIDInterfaceInfo->State, 0x00, sizeof(HIDInterfaceInfo->State));
    	HIDInterfaceInfo->State.UsingReportProtocol = true;
    	HIDInterfaceInfo->State.IdleCount = 500;
    
    	if (!(Endpoint_ConfigureEndpoint(HIDInterfaceInfo->Config.ReportINEndpointNumber, EP_TYPE_INTERRUPT,
    									 ENDPOINT_DIR_IN, HIDInterfaceInfo->Config.ReportINEndpointSize,
    									 HIDInterfaceInfo->Config.ReportINEndpointDoubleBank ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
    	{
    		return false;
    	}
    
    	return true;
    }
    
    void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
    {
    	if (USB_DeviceState != DEVICE_STATE_Configured)
    	  return;
    
    	Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpointNumber);
    
    	if (Endpoint_IsReadWriteAllowed())
    	{
    		uint8_t  ReportINData[HIDInterfaceInfo->Config.PrevReportINBufferSize];
    		uint8_t  ReportID     = 0;
    		uint16_t ReportINSize = 0;
    
    		memset(ReportINData, 0, sizeof(ReportINData));
    
    		bool ForceSend         = CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, HID_REPORT_ITEM_In,
    		                                                             ReportINData, &ReportINSize);
    		bool StatesChanged     = false;
    		bool IdlePeriodElapsed = (HIDInterfaceInfo->State.IdleCount && !(HIDInterfaceInfo->State.IdleMSRemaining));
    
    		if (HIDInterfaceInfo->Config.PrevReportINBuffer != NULL)
    		{
    			StatesChanged = (memcmp(ReportINData, HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize) != 0);
    			memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINData, HIDInterfaceInfo->Config.PrevReportINBufferSize);
    		}
    
    		if (ReportINSize && (ForceSend || StatesChanged || IdlePeriodElapsed))
    		{
    			HIDInterfaceInfo->State.IdleMSRemaining = HIDInterfaceInfo->State.IdleCount;
    
    			Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpointNumber);
    
    			if (ReportID)
    			  Endpoint_Write_8(ReportID);
    
    			Endpoint_Write_Stream_LE(ReportINData, ReportINSize, NULL);
    
    			Endpoint_ClearIN();
    		}
    	}
    }
    
    #endif