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Rename new CDC class bootloader NO_LOCK_BYTE_SUPPORT compile time option to NO_LOCK_B...
[pub/USBasp.git] / LUFA / Drivers / USB / Class / Host / CDC.c
diff --git a/LUFA/Drivers/USB/Class/Host/CDC.c b/LUFA/Drivers/USB/Class/Host/CDC.c
index 3d158fb..9304161 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/CDC.c
+++ b/LUFA/Drivers/USB/Class/Host/CDC.c
@@ -1,21 +1,21 @@
 /*
              LUFA Library
      Copyright (C) Dean Camera, 2010.
 /*
              LUFA Library
      Copyright (C) Dean Camera, 2010.
-              
+
   dean [at] fourwalledcubicle [dot] com
   dean [at] fourwalledcubicle [dot] com
-      www.fourwalledcubicle.com
+           www.lufa-lib.org
 */
 
 /*
   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 
 */
 
 /*
   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 
-  Permission to use, copy, modify, distribute, and sell this 
+  Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
   software and its documentation for any purpose is hereby granted
-  without fee, provided that the above copyright notice appear in 
+  without fee, provided that the above copyright notice appear in
   all copies and that both that the copyright notice and this
   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 
+  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 without specific, written prior permission.
 
   The author disclaim all warranties with regard to this
@@ -32,158 +32,154 @@
 #include "../../HighLevel/USBMode.h"
 #if defined(USB_CAN_BE_HOST)
 
 #include "../../HighLevel/USBMode.h"
 #if defined(USB_CAN_BE_HOST)
 
-#define  __INCLUDE_FROM_CDC_CLASS_HOST_C
 #define  __INCLUDE_FROM_CDC_DRIVER
 #define  __INCLUDE_FROM_CDC_DRIVER
+#define  __INCLUDE_FROM_CDC_HOST_C
 #include "CDC.h"
 
 #include "CDC.h"
 
-uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, uint16_t ConfigDescriptorSize,
+uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+                                uint16_t ConfigDescriptorSize,
                                 void* ConfigDescriptorData)
 {
                                 void* ConfigDescriptorData)
 {
-       uint8_t FoundEndpoints = 0;
+       USB_Descriptor_Endpoint_t*  DataINEndpoint       = NULL;
+       USB_Descriptor_Endpoint_t*  DataOUTEndpoint      = NULL;
+       USB_Descriptor_Endpoint_t*  NotificationEndpoint = NULL;
+       USB_Descriptor_Interface_t* CDCControlInterface  = NULL;
 
        memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));
 
        if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
          return CDC_ENUMERROR_InvalidConfigDescriptor;
 
        memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));
 
        if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
          return CDC_ENUMERROR_InvalidConfigDescriptor;
-       
-       if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
-                                     DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
-       {
-               return CDC_ENUMERROR_NoCDCInterfaceFound;
-       }
-       
-       CDCInterfaceInfo->State.ControlInterfaceNumber = DESCRIPTOR_CAST(ConfigDescriptorData, USB_Descriptor_Interface_t).InterfaceNumber;
 
 
-       while (FoundEndpoints != (CDC_FOUND_NOTIFICATION_IN | CDC_FOUND_DATAPIPE_IN | CDC_FOUND_DATAPIPE_OUT))
+       while (!(DataINEndpoint) || !(DataOUTEndpoint) || !(NotificationEndpoint))
        {
        {
-               if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
-                                             DComp_CDC_Host_NextCDCInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+               if (!(CDCControlInterface) ||
+                   USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+                                             DCOMP_CDC_Host_NextCDCInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
                {
                {
-                       if (FoundEndpoints & CDC_FOUND_NOTIFICATION_IN)
+                       if (NotificationEndpoint)
                        {
                        {
-                               if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, 
-                                                             DComp_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+                               if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+                                                             DCOMP_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
                                {
                                {
-                                       return CDC_ENUMERROR_NoCDCInterfaceFound;
+                                       return CDC_ENUMERROR_NoCompatibleInterfaceFound;
                                }
                                }
+
+                               DataINEndpoint  = NULL;
+                               DataOUTEndpoint = NULL;
                        }
                        else
                        {
                        }
                        else
                        {
-                               FoundEndpoints = 0;
-
-                               Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
-                               Pipe_DisablePipe();
-                               Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
-                               Pipe_DisablePipe();
-                               Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
-                               Pipe_DisablePipe();
-                       
                                if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
                                if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
-                                                             DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+                                                             DCOMP_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
                                {
                                {
-                                       return CDC_ENUMERROR_NoCDCInterfaceFound;
+                                       return CDC_ENUMERROR_NoCompatibleInterfaceFound;
                                }
                                }
-                       }
 
 
-                       if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
-                                                     DComp_CDC_Host_NextCDCInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
-                       {
-                               return CDC_ENUMERROR_EndpointsNotFound;
+                               CDCControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
+
+                               NotificationEndpoint = NULL;
                        }
                        }
+
+                       continue;
                }
                }
-               
+
                USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
 
                USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
 
-               if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
+               if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
                {
                {
-                       if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
-                       {
-                               Pipe_ConfigurePipe(CDCInterfaceInfo->Config.NotificationPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
-                                                                  EndpointData->EndpointAddress, EndpointData->EndpointSize,
-                                                                  CDCInterfaceInfo->Config.NotificationPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
-                               CDCInterfaceInfo->State.NotificationPipeSize = EndpointData->EndpointSize;
-
-                               Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
-                               
-                               FoundEndpoints |= CDC_FOUND_NOTIFICATION_IN;
-                       }
+                       if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
+                         NotificationEndpoint = EndpointData;
+                       else
+                         DataINEndpoint = EndpointData;
                }
                else
                {
                }
                else
                {
-                       if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
-                       {
-                               Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
-                                                  EndpointData->EndpointAddress, EndpointData->EndpointSize, 
-                                                  CDCInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+                       DataOUTEndpoint = EndpointData;
+               }
+       }
 
 
-                               CDCInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
+       for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
+       {
+               if (PipeNum == CDCInterfaceInfo->Config.DataINPipeNumber)
+               {
+                       Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+                                          DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+                                          CDCInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
 
 
-                               FoundEndpoints |= CDC_FOUND_DATAPIPE_IN;
-                       }
-                       else
-                       {
-                               Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
-                                                                  EndpointData->EndpointAddress, EndpointData->EndpointSize, 
-                                                                  CDCInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
-                       
-                               CDCInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
-                               
-                               FoundEndpoints |= CDC_FOUND_DATAPIPE_OUT;
-                       }
+                       CDCInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
+               }
+               else if (PipeNum == CDCInterfaceInfo->Config.DataOUTPipeNumber)
+               {
+                       Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+                                          DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+                                          CDCInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+
+                       CDCInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
+               }
+               else if (PipeNum == CDCInterfaceInfo->Config.NotificationPipeNumber)
+               {
+                       Pipe_ConfigurePipe(PipeNum, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+                                          NotificationEndpoint->EndpointAddress, NotificationEndpoint->EndpointSize,
+                                          CDCInterfaceInfo->Config.NotificationPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+                       Pipe_SetInterruptPeriod(NotificationEndpoint->PollingIntervalMS);
+
+                       CDCInterfaceInfo->State.NotificationPipeSize = NotificationEndpoint->EndpointSize;
                }
        }
 
                }
        }
 
+       CDCInterfaceInfo->State.ControlInterfaceNumber = CDCControlInterface->InterfaceNumber;
        CDCInterfaceInfo->State.ControlLineStates.HostToDevice = (CDC_CONTROL_LINE_OUT_RTS | CDC_CONTROL_LINE_OUT_DTR);
        CDCInterfaceInfo->State.ControlLineStates.DeviceToHost = (CDC_CONTROL_LINE_IN_DCD  | CDC_CONTROL_LINE_IN_DSR);
        CDCInterfaceInfo->State.IsActive = true;
        CDCInterfaceInfo->State.ControlLineStates.HostToDevice = (CDC_CONTROL_LINE_OUT_RTS | CDC_CONTROL_LINE_OUT_DTR);
        CDCInterfaceInfo->State.ControlLineStates.DeviceToHost = (CDC_CONTROL_LINE_IN_DCD  | CDC_CONTROL_LINE_IN_DSR);
        CDCInterfaceInfo->State.IsActive = true;
+
        return CDC_ENUMERROR_NoError;
 }
 
        return CDC_ENUMERROR_NoError;
 }
 
-static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* const CurrentDescriptor)
+static uint8_t DCOMP_CDC_Host_NextCDCControlInterface(void* const CurrentDescriptor)
 {
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
        {
                USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
                                                                                USB_Descriptor_Interface_t);
 {
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
        {
                USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
                                                                                USB_Descriptor_Interface_t);
-       
-               if ((CurrentInterface->Class    == CDC_CONTROL_CLASS)    &&
-                   (CurrentInterface->SubClass == CDC_CONTROL_SUBCLASS) &&
-                       (CurrentInterface->Protocol == CDC_CONTROL_PROTOCOL))
+
+               if ((CurrentInterface->Class    == CDC_CSCP_CDCClass)    &&
+                   (CurrentInterface->SubClass == CDC_CSCP_ACMSubclass) &&
+                   (CurrentInterface->Protocol == CDC_CSCP_ATCommandProtocol))
                {
                        return DESCRIPTOR_SEARCH_Found;
                }
        }
                {
                        return DESCRIPTOR_SEARCH_Found;
                }
        }
-       
+
        return DESCRIPTOR_SEARCH_NotFound;
 }
 
        return DESCRIPTOR_SEARCH_NotFound;
 }
 
-static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* const CurrentDescriptor)
+static uint8_t DCOMP_CDC_Host_NextCDCDataInterface(void* const CurrentDescriptor)
 {
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
        {
                USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
                                                                                USB_Descriptor_Interface_t);
 {
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
        {
                USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
                                                                                USB_Descriptor_Interface_t);
-       
-               if ((CurrentInterface->Class    == CDC_DATA_CLASS)    &&
-                   (CurrentInterface->SubClass == CDC_DATA_SUBCLASS) &&
-                       (CurrentInterface->Protocol == CDC_DATA_PROTOCOL))
+
+               if ((CurrentInterface->Class    == CDC_CSCP_CDCDataClass)   &&
+                   (CurrentInterface->SubClass == CDC_CSCP_NoDataSubclass) &&
+                   (CurrentInterface->Protocol == CDC_CSCP_NoDataProtocol))
                {
                        return DESCRIPTOR_SEARCH_Found;
                }
        }
                {
                        return DESCRIPTOR_SEARCH_Found;
                }
        }
-       
+
        return DESCRIPTOR_SEARCH_NotFound;
 }
 
        return DESCRIPTOR_SEARCH_NotFound;
 }
 
-static uint8_t DComp_CDC_Host_NextCDCInterfaceEndpoint(void* const CurrentDescriptor)
+static uint8_t DCOMP_CDC_Host_NextCDCInterfaceEndpoint(void* const CurrentDescriptor)
 {
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
        {
                USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
                                                                              USB_Descriptor_Endpoint_t);
 {
        if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
        {
                USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
                                                                              USB_Descriptor_Endpoint_t);
-       
+
                uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
                uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
-       
+
                if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
                    !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
                {
                if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
                    !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
                {
@@ -202,31 +198,37 @@ void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return;
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return;
-       
+
        Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
        Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
-       Pipe_SetPipeToken(PIPE_TOKEN_IN);
        Pipe_Unfreeze();
 
        if (Pipe_IsINReceived())
        {
                USB_Request_Header_t Notification;
                Pipe_Read_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NO_STREAM_CALLBACK);
        Pipe_Unfreeze();
 
        if (Pipe_IsINReceived())
        {
                USB_Request_Header_t Notification;
                Pipe_Read_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NO_STREAM_CALLBACK);
-               
-               if ((Notification.bRequest      == NOTIF_SerialState) &&
+
+               if ((Notification.bRequest      == CDC_NOTIF_SerialState) &&
                    (Notification.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)))
                {
                        Pipe_Read_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
                                            sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
                                            NO_STREAM_CALLBACK);
                    (Notification.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)))
                {
                        Pipe_Read_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
                                            sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
                                            NO_STREAM_CALLBACK);
-                       
-               }
 
 
-               Pipe_ClearIN();
+                       Pipe_ClearIN();
 
 
-               EVENT_CDC_Host_ControLineStateChanged(CDCInterfaceInfo);
+                       EVENT_CDC_Host_ControLineStateChanged(CDCInterfaceInfo);
+               }
+               else
+               {
+                       Pipe_ClearIN();
+               }
        }
        }
-       
+
        Pipe_Freeze();
        Pipe_Freeze();
+
+       #if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
+       CDC_Host_Flush(CDCInterfaceInfo);
+       #endif
 }
 
 uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 }
 
 uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
@@ -234,14 +236,14 @@ uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInf
        USB_ControlRequest = (USB_Request_Header_t)
        {
                .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
        USB_ControlRequest = (USB_Request_Header_t)
        {
                .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
-               .bRequest      = REQ_SetLineEncoding,
+               .bRequest      = CDC_REQ_SetLineEncoding,
                .wValue        = 0,
                .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
                .wLength       = sizeof(CDCInterfaceInfo->State.LineEncoding),
        };
 
        Pipe_SelectPipe(PIPE_CONTROLPIPE);
                .wValue        = 0,
                .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
                .wLength       = sizeof(CDCInterfaceInfo->State.LineEncoding),
        };
 
        Pipe_SelectPipe(PIPE_CONTROLPIPE);
-       
+
        return USB_Host_SendControlRequest(&CDCInterfaceInfo->State.LineEncoding);
 }
 
        return USB_Host_SendControlRequest(&CDCInterfaceInfo->State.LineEncoding);
 }
 
@@ -250,59 +252,63 @@ uint8_t CDC_Host_SendControlLineStateChange(USB_ClassInfo_CDC_Host_t* const CDCI
        USB_ControlRequest = (USB_Request_Header_t)
        {
                .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
        USB_ControlRequest = (USB_Request_Header_t)
        {
                .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
-               .bRequest      = REQ_SetControlLineState,
+               .bRequest      = CDC_REQ_SetControlLineState,
                .wValue        = CDCInterfaceInfo->State.ControlLineStates.HostToDevice,
                .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
                .wLength       = 0,
        };
 
        Pipe_SelectPipe(PIPE_CONTROLPIPE);
                .wValue        = CDCInterfaceInfo->State.ControlLineStates.HostToDevice,
                .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
                .wLength       = 0,
        };
 
        Pipe_SelectPipe(PIPE_CONTROLPIPE);
-       
+
        return USB_Host_SendControlRequest(NULL);
 }
 
        return USB_Host_SendControlRequest(NULL);
 }
 
-uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, const uint8_t Duration)
+uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+                           const uint8_t Duration)
 {
        USB_ControlRequest = (USB_Request_Header_t)
        {
                .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
 {
        USB_ControlRequest = (USB_Request_Header_t)
        {
                .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
-               .bRequest      = REQ_SendBreak,
+               .bRequest      = CDC_REQ_SendBreak,
                .wValue        = Duration,
                .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
                .wLength       = 0,
        };
 
        Pipe_SelectPipe(PIPE_CONTROLPIPE);
                .wValue        = Duration,
                .wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
                .wLength       = 0,
        };
 
        Pipe_SelectPipe(PIPE_CONTROLPIPE);
-       
+
        return USB_Host_SendControlRequest(NULL);
 }
 
        return USB_Host_SendControlRequest(NULL);
 }
 
-uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, char* Data, const uint16_t Length)
+uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+                            const char* const Data,
+                            const uint16_t Length)
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return PIPE_READYWAIT_DeviceDisconnected;
 
        uint8_t ErrorCode;
 
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return PIPE_READYWAIT_DeviceDisconnected;
 
        uint8_t ErrorCode;
 
-       Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);    
+       Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
 
        Pipe_Unfreeze();
        ErrorCode = Pipe_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
        Pipe_Freeze();
 
        Pipe_Unfreeze();
        ErrorCode = Pipe_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
        Pipe_Freeze();
-       
+
        return ErrorCode;
 }
 
        return ErrorCode;
 }
 
-uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, const uint8_t Data)
+uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+                          const uint8_t Data)
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return PIPE_READYWAIT_DeviceDisconnected;
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return PIPE_READYWAIT_DeviceDisconnected;
-         
+
        uint8_t ErrorCode;
 
        uint8_t ErrorCode;
 
-       Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);    
+       Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
        Pipe_Unfreeze();
        Pipe_Unfreeze();
-       
+
        if (!(Pipe_IsReadWriteAllowed()))
        {
                Pipe_ClearOUT();
        if (!(Pipe_IsReadWriteAllowed()))
        {
                Pipe_ClearOUT();
@@ -311,9 +317,9 @@ uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, cons
                  return ErrorCode;
        }
 
                  return ErrorCode;
        }
 
-       Pipe_Write_Byte(Data);  
+       Pipe_Write_Byte(Data);
        Pipe_Freeze();
        Pipe_Freeze();
-       
+
        return PIPE_READYWAIT_NoError;
 }
 
        return PIPE_READYWAIT_NoError;
 }
 
@@ -321,9 +327,8 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return 0;
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return 0;
-       
+
        Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
        Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
-       Pipe_SetPipeToken(PIPE_TOKEN_IN);
        Pipe_Unfreeze();
 
        if (Pipe_IsINReceived())
        Pipe_Unfreeze();
 
        if (Pipe_IsINReceived())
@@ -343,29 +348,32 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
        else
        {
                Pipe_Freeze();
        else
        {
                Pipe_Freeze();
-               
+
                return 0;
        }
 }
 
                return 0;
        }
 }
 
-uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
+int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 {
 {
-       uint8_t ReceivedByte = 0;
-
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
-         return 0;
-         
+         return -1;
+
+       int16_t ReceivedByte = -1;
+
        Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
        Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
-       Pipe_SetPipeToken(PIPE_TOKEN_IN);
        Pipe_Unfreeze();
 
        Pipe_Unfreeze();
 
-       ReceivedByte = Pipe_Read_Byte();
-       
-       if (!(Pipe_BytesInPipe()))
-         Pipe_ClearIN();
-       
+       if (Pipe_IsINReceived())
+       {
+               if (Pipe_BytesInPipe())
+                 ReceivedByte = Pipe_Read_Byte();
+
+               if (!(Pipe_BytesInPipe()))
+                 Pipe_ClearIN();
+       }
+
        Pipe_Freeze();
        Pipe_Freeze();
-       
+
        return ReceivedByte;
 }
 
        return ReceivedByte;
 }
 
@@ -373,12 +381,12 @@ uint8_t CDC_Host_Flush(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return PIPE_READYWAIT_DeviceDisconnected;
 {
        if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
          return PIPE_READYWAIT_DeviceDisconnected;
-         
+
        uint8_t ErrorCode;
 
        uint8_t ErrorCode;
 
-       Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);    
+       Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
        Pipe_Unfreeze();
        Pipe_Unfreeze();
-       
+
        if (!(Pipe_BytesInPipe()))
          return PIPE_READYWAIT_NoError;
 
        if (!(Pipe_BytesInPipe()))
          return PIPE_READYWAIT_NoError;
 
@@ -395,38 +403,45 @@ uint8_t CDC_Host_Flush(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
        }
 
        Pipe_Freeze();
        }
 
        Pipe_Freeze();
-       
+
        return PIPE_READYWAIT_NoError;
 }
 
        return PIPE_READYWAIT_NoError;
 }
 
-void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, FILE* Stream)
+void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+                           FILE* const Stream)
 {
        *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar, _FDEV_SETUP_RW);
        fdev_set_udata(Stream, CDCInterfaceInfo);
 }
 
 {
        *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar, _FDEV_SETUP_RW);
        fdev_set_udata(Stream, CDCInterfaceInfo);
 }
 
-void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, FILE* Stream)
+void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+                                   FILE* const Stream)
 {
        *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar_Blocking, _FDEV_SETUP_RW);
        fdev_set_udata(Stream, CDCInterfaceInfo);
 }
 
 {
        *Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar_Blocking, _FDEV_SETUP_RW);
        fdev_set_udata(Stream, CDCInterfaceInfo);
 }
 
-static int CDC_Host_putchar(char c, FILE* Stream)
+static int CDC_Host_putchar(char c,
+                            FILE* Stream)
 {
        return CDC_Host_SendByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
 }
 
 static int CDC_Host_getchar(FILE* Stream)
 {
 {
        return CDC_Host_SendByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
 }
 
 static int CDC_Host_getchar(FILE* Stream)
 {
-       if (!(CDC_Host_BytesReceived((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream))))
+       int16_t ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
+
+       if (ReceivedByte < 0)
          return _FDEV_EOF;
 
          return _FDEV_EOF;
 
-       return CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
+       return ReceivedByte;
 }
 
 static int CDC_Host_getchar_Blocking(FILE* Stream)
 {
 }
 
 static int CDC_Host_getchar_Blocking(FILE* Stream)
 {
-       while (!(CDC_Host_BytesReceived((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream))))
+       int16_t ReceivedByte;
+
+       while ((ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream))) < 0)
        {
                if (USB_HostState == HOST_STATE_Unattached)
                  return _FDEV_EOF;
        {
                if (USB_HostState == HOST_STATE_Unattached)
                  return _FDEV_EOF;
@@ -435,7 +450,7 @@ static int CDC_Host_getchar_Blocking(FILE* Stream)
                USB_USBTask();
        }
 
                USB_USBTask();
        }
 
-       return CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
+       return ReceivedByte;
 }
 
 void CDC_Host_Event_Stub(void)
 }
 
 void CDC_Host_Event_Stub(void)
@@ -444,3 +459,4 @@ void CDC_Host_Event_Stub(void)
 }
 
 #endif
 }
 
 #endif
+
USB isp AVR programmer