/* LUFA Library Copyright (C) Dean Camera, 2009. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ /* Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, 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. */ #include "../LowLevel/USBMode.h" #define INCLUDE_FROM_USBTASK_C #include "USBTask.h" volatile bool USB_IsSuspended; volatile bool USB_IsConnected; volatile bool USB_IsInitialized; #if defined(USB_CAN_BE_HOST) volatile uint8_t USB_HostState; #endif TASK(USB_USBTask) { #if defined(USB_HOST_ONLY) USB_HostTask(); #elif defined(USB_DEVICE_ONLY) USB_DeviceTask(); #else if (USB_CurrentMode == USB_MODE_DEVICE) USB_DeviceTask(); else if (USB_CurrentMode == USB_MODE_HOST) USB_HostTask(); #endif } #if defined(USB_CAN_BE_DEVICE) static void USB_DeviceTask(void) { if (USB_IsConnected) { uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint(); Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP); if (Endpoint_IsSetupReceived()) { ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { USB_Device_ProcessControlPacket(); } } Endpoint_SelectEndpoint(PrevEndpoint); } } #endif #if defined(USB_CAN_BE_HOST) static void USB_HostTask(void) { uint8_t ErrorCode = HOST_ENUMERROR_NoError; uint8_t SubErrorCode = HOST_ENUMERROR_NoError; static uint16_t WaitMSRemaining; static uint8_t PostWaitState; switch (USB_HostState) { case HOST_STATE_WaitForDevice: if (WaitMSRemaining) { if ((SubErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful) { USB_HostState = PostWaitState; ErrorCode = HOST_ENUMERROR_WaitStage; break; } WaitMSRemaining--; } else { USB_HostState = PostWaitState; } break; case HOST_STATE_Attached: WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS; USB_HostState = HOST_STATE_Attached_WaitForDeviceSettle; break; case HOST_STATE_Attached_WaitForDeviceSettle: _delay_ms(1); if (!(WaitMSRemaining--)) { USB_Host_VBUS_Manual_Off(); USB_OTGPAD_On(); USB_Host_VBUS_Auto_Enable(); USB_Host_VBUS_Auto_On(); USB_HostState = HOST_STATE_Attached_WaitForConnect; } break; case HOST_STATE_Attached_WaitForConnect: if (USB_INT_HasOccurred(USB_INT_DCONNI)) { USB_INT_Clear(USB_INT_DCONNI); USB_INT_Clear(USB_INT_DDISCI); USB_INT_Clear(USB_INT_VBERRI); USB_INT_Enable(USB_INT_VBERRI); USB_IsConnected = true; RAISE_EVENT(USB_Connect); USB_Host_ResumeBus(); Pipe_ClearPipes(); HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Attached_DoReset); } break; case HOST_STATE_Attached_DoReset: USB_Host_ResetDevice(); HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered); break; case HOST_STATE_Powered: Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL, PIPE_TOKEN_SETUP, PIPE_CONTROLPIPE, PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE); if (!(Pipe_IsConfigured())) { ErrorCode = HOST_ENUMERROR_PipeConfigError; SubErrorCode = 0; break; } USB_HostState = HOST_STATE_Default; break; case HOST_STATE_Default: USB_HostRequest = (USB_Host_Request_Header_t) { bmRequestType: (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE), bRequest: REQ_GetDescriptor, wValue: (DTYPE_Device << 8), wIndex: 0, wLength: PIPE_CONTROLPIPE_DEFAULT_SIZE, }; #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) uint8_t* DataBuffer = alloca(offsetof(USB_Descriptor_Device_t, Endpoint0Size) + 1); #else uint8_t* DataBuffer = alloca(offsetof(USB_Descriptor_Device_t, bMaxPacketSize0) + 1); #endif if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful) { ErrorCode = HOST_ENUMERROR_ControlError; break; } #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)]; #else USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, bMaxPacketSize0)]; #endif USB_Host_ResetDevice(); HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset); break; case HOST_STATE_Default_PostReset: Pipe_DisablePipe(); Pipe_DeallocateMemory(); Pipe_ResetPipe(PIPE_CONTROLPIPE); Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL, PIPE_TOKEN_SETUP, PIPE_CONTROLPIPE, USB_ControlPipeSize, PIPE_BANK_SINGLE); if (!(Pipe_IsConfigured())) { ErrorCode = HOST_ENUMERROR_PipeConfigError; SubErrorCode = 0; break; } Pipe_SetInfiniteINRequests(); USB_HostRequest = (USB_Host_Request_Header_t) { bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE), bRequest: REQ_SetAddress, wValue: USB_HOST_DEVICEADDRESS, wIndex: 0, wLength: 0, }; if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful) { ErrorCode = HOST_ENUMERROR_ControlError; break; } HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet); break; case HOST_STATE_Default_PostAddressSet: USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS); RAISE_EVENT(USB_DeviceEnumerationComplete); USB_HostState = HOST_STATE_Addressed; break; } if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached)) { RAISE_EVENT(USB_DeviceEnumerationFailed, ErrorCode, SubErrorCode); USB_Host_VBUS_Auto_Off(); RAISE_EVENT(USB_DeviceUnattached); if (USB_IsConnected) RAISE_EVENT(USB_Disconnect); USB_ResetInterface(); } } #endif