Better documentation for the Endpoint_ConfigureEndpoint() and Pipe_ConfigurePipe...

[pub/USBasp.git] / Demos / Device / Incomplete / TestAndMeasurement / TestAndMeasurement.c

diff --git a/Demos/Device/Incomplete/TestAndMeasurement/TestAndMeasurement.c b/Demos/Device/Incomplete/TestAndMeasurement/TestAndMeasurement.c
index 6a2cff4..55e17bc 100644 (file)
--- a/Demos/Device/Incomplete/TestAndMeasurement/TestAndMeasurement.c
+++ b/Demos/Device/Incomplete/TestAndMeasurement/TestAndMeasurement.c
@@ -30,6 +30,41 @@
 \r
 #include "TestAndMeasurement.h"\r
 \r
 \r
 #include "TestAndMeasurement.h"\r
 \r

+/** Contains the (usually static) capabilities of the TMC device. This table is requested by the\r
+ *  host upon enumeration to give it information on what features of the Test and Measurement USB\r
+ *  Class the device supports.\r
+ */\r
+TMC_Capabilities_t Capabilities =\r
+       {\r
+               .Status     = TMC_STATUS_SUCCESS,\r
+               .TMCVersion = VERSION_BCD(1.00),\r
+               \r
+               .Interface  =\r
+                       {\r
+                               .ListenOnly             = false,\r
+                               .TalkOnly               = false,\r
+                               .PulseIndicateSupported = false,\r
+                       },\r
+\r
+               .Device     =\r
+                       {\r
+                               .SupportsAbortINOnMatch = false,\r
+                       },\r
+       };\r
+\r
+/** Current TMC control request that is being processed */\r
+uint8_t RequestInProgress = 0;\r
+\r
+/** Stream callback abort flag for bulk IN data */\r
+bool IsTMCBulkINReset = false;\r
+\r
+/** Stream callback abort flag for bulk OUT data */\r
+bool IsTMCBulkOUTReset = false;\r
+\r
+/** Last used tag value for data transfers */\r
+uint8_t CurrentTransferTag = 0;\r
+\r
+\r

 /** Main program entry point. This routine contains the overall program flow, including initial\r
  *  setup of all components and the main program loop.\r
  */\r
 /** Main program entry point. This routine contains the overall program flow, including initial\r
  *  setup of all components and the main program loop.\r
  */\r


@@ -62,95 +97,335 @@ void SetupHardware(void)
        USB_Init();\r
 }\r
 \r
        USB_Init();\r
 }\r
 \r

+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and\r
+ *  starts the library USB task to begin the enumeration and USB management process.\r
+ */\r

 void EVENT_USB_Device_Connect(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
 }\r
 \r
 void EVENT_USB_Device_Connect(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
 }\r
 \r

+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
+ *  the status LEDs and stops the USB management and CDC management tasks.\r
+ */\r

 void EVENT_USB_Device_Disconnect(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
 }\r
 \r
 void EVENT_USB_Device_Disconnect(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
 }\r
 \r

+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
+ *  of the USB device after enumeration - the device endpoints are configured and the CDC management task started.\r
+ */\r

 void EVENT_USB_Device_ConfigurationChanged(void)\r
 {\r
 void EVENT_USB_Device_ConfigurationChanged(void)\r
 {\r

-       LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
+       bool ConfigSuccess = true;\r

 \r
 \r

-       /* Setup TMC In and Out Endpoints */\r
-       if (!(Endpoint_ConfigureEndpoint(TMC_IN_EPNUM, EP_TYPE_BULK,\r
-                                            ENDPOINT_DIR_IN, TMC_IO_EPSIZE,\r
-                                        ENDPOINT_BANK_SINGLE)))\r
-       {\r
-               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-       }\r
+       /* Setup TMC In, Out and Notification Endpoints */\r
+       ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_IN_EPNUM,  EP_TYPE_BULK, ENDPOINT_DIR_IN,\r
+                                                   TMC_IO_EPSIZE, ENDPOINT_BANK_SINGLE);\r
+       ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_OUT_EPNUM, EP_TYPE_BULK, ENDPOINT_DIR_OUT,\r
+                                                   TMC_IO_EPSIZE, ENDPOINT_BANK_SINGLE);\r
+       ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT, ENDPOINT_DIR_IN,\r
+                                                   TMC_IO_EPSIZE, ENDPOINT_BANK_SINGLE);\r

 \r
 \r

-       if (!(Endpoint_ConfigureEndpoint(TMC_OUT_EPNUM, EP_TYPE_BULK,\r
-                                            ENDPOINT_DIR_OUT, TMC_IO_EPSIZE,\r
-                                        ENDPOINT_BANK_SINGLE)))\r
-       {\r
-               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-       }\r
+       /* Indicate endpoint configuration success or failure */\r
+       LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);\r

 }\r
 \r
 }\r
 \r

+/** Event handler for the USB_UnhandledControlRequest event. This is used to catch standard and class specific\r
+ *  control requests that are not handled internally by the USB library (including the CDC control commands,\r
+ *  which are all issued via the control endpoint), so that they can be handled appropriately for the application.\r
+ */\r

 void EVENT_USB_Device_UnhandledControlRequest(void)\r
 {\r
 void EVENT_USB_Device_UnhandledControlRequest(void)\r
 {\r

+       uint8_t TMCRequestStatus = TMC_STATUS_SUCCESS;\r
+\r
+       /* Process TMC specific control requests */\r

        switch (USB_ControlRequest.bRequest)\r
        {\r
                case Req_InitiateAbortBulkOut:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r
        switch (USB_ControlRequest.bRequest)\r
        {\r
                case Req_InitiateAbortBulkOut:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r

-                       \r
+                               /* Check that no split transaction is already in progress and the data transfer tag is valid */\r
+                               if (RequestInProgress != 0)\r
+                               {\r
+                                       TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;\r
+                               }\r
+                               else if (USB_ControlRequest.wValue != CurrentTransferTag)\r
+                               {\r
+                                       TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;\r
+                               }\r
+                               else\r
+                               {\r
+                                       /* Indicate that all in-progress/pending data OUT requests should be aborted */\r
+                                       IsTMCBulkOUTReset = true;\r
+                                       \r
+                                       /* Save the split request for later checking when a new request is received */\r
+                                       RequestInProgress = Req_InitiateAbortBulkOut;\r
+                               }\r
+\r
+                               Endpoint_ClearSETUP();\r
+                               \r
+                               /* Write the request response byte */\r
+                               Endpoint_Write_Byte(TMCRequestStatus);\r
+\r
+                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();\r

                        }\r
                        \r
                        break;\r
                case Req_CheckAbortBulkOutStatus:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r
                        }\r
                        \r
                        break;\r
                case Req_CheckAbortBulkOutStatus:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r

-                       \r
+                               /* Check that an ABORT BULK OUT transaction has been requested and that the request has completed */\r
+                               if (RequestInProgress != Req_InitiateAbortBulkOut)\r
+                                 TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;                          \r
+                               else if (IsTMCBulkOUTReset)\r
+                                 TMCRequestStatus = TMC_STATUS_PENDING;\r
+                               else\r
+                                 RequestInProgress = 0;        \r
+\r
+                               Endpoint_ClearSETUP();\r
+                                                               \r
+                               /* Write the request response bytes */\r
+                               Endpoint_Write_Byte(TMCRequestStatus);\r
+                               Endpoint_Write_Word_LE(0);\r
+                               Endpoint_Write_DWord_LE(0); // TODO - Last transfer length\r
+\r
+                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();                            \r

                        }\r
                        \r
                        break;\r
                case Req_InitiateAbortBulkIn:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r
                        }\r
                        \r
                        break;\r
                case Req_InitiateAbortBulkIn:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r

-                       \r
+                               /* Check that no split transaction is already in progress and the data transfer tag is valid */\r
+                               if (RequestInProgress != 0)\r
+                               {\r
+                                       TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;                                \r
+                               }\r
+                               else if (USB_ControlRequest.wValue != CurrentTransferTag)\r
+                               {\r
+                                       TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;\r
+                               }\r
+                               else\r
+                               {\r
+                                       /* Indicate that all in-progress/pending data IN requests should be aborted */\r
+                                       IsTMCBulkINReset = true;\r
+                                       \r
+                                       /* Save the split request for later checking when a new request is received */\r
+                                       RequestInProgress = Req_InitiateAbortBulkIn;\r
+                               }\r
+\r
+                               Endpoint_ClearSETUP();\r
+                               \r
+                               /* Write the request response bytes */\r
+                               Endpoint_Write_Byte(TMCRequestStatus);\r
+                               Endpoint_Write_Byte(CurrentTransferTag);\r
+\r
+                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();\r

                        }\r
                        \r
                        break;\r
                case Req_CheckAbortBulkInStatus:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r
                        }\r
                        \r
                        break;\r
                case Req_CheckAbortBulkInStatus:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))\r
                        {\r

-                       \r
+                               /* Check that an ABORT BULK IN transaction has been requested and that the request has completed */\r
+                               if (RequestInProgress != Req_InitiateAbortBulkIn)\r
+                                 TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;\r
+                               else if (IsTMCBulkINReset)\r
+                                 TMCRequestStatus = TMC_STATUS_PENDING;\r
+                               else\r
+                                 RequestInProgress = 0;\r
+\r
+                               Endpoint_ClearSETUP();\r
+                                                               \r
+                               /* Write the request response bytes */\r
+                               Endpoint_Write_Byte(TMCRequestStatus);\r
+                               Endpoint_Write_Word_LE(0);\r
+                               Endpoint_Write_DWord_LE(0); // TODO - Last transfer length\r
+\r
+                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();\r

                        }\r
                        \r
                        break;\r
                case Req_InitiateClear:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
                        {\r
                        }\r
                        \r
                        break;\r
                case Req_InitiateClear:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
                        {\r

-                       \r
+                               /* Check that no split transaction is already in progress */\r
+                               if (RequestInProgress != 0)\r
+                               {\r
+                                       Endpoint_Write_Byte(TMC_STATUS_SPLIT_IN_PROGRESS);                              \r
+                               }\r
+                               else\r
+                               {\r
+                                       /* Indicate that all in-progress/pending data IN and OUT requests should be aborted */\r
+                                       IsTMCBulkINReset  = true;\r
+                                       IsTMCBulkOUTReset = true;\r
+                                       \r
+                                       /* Save the split request for later checking when a new request is received */\r
+                                       RequestInProgress = Req_InitiateClear;\r
+                               }\r
+\r
+                               Endpoint_ClearSETUP();\r
+                               \r
+                               /* Write the request response byte */\r
+                               Endpoint_Write_Byte(TMCRequestStatus);\r
+\r
+                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();\r

                        }\r
                        \r
                        break;\r
                case Req_CheckClearStatus:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
                        {\r
                        }\r
                        \r
                        break;\r
                case Req_CheckClearStatus:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
                        {\r

-                       \r
+                               /* Check that a CLEAR transaction has been requested and that the request has completed */\r
+                               if (RequestInProgress != Req_InitiateClear)\r
+                                 TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;                          \r
+                               else if (IsTMCBulkINReset || IsTMCBulkOUTReset)\r
+                                 TMCRequestStatus = TMC_STATUS_PENDING;\r
+                               else\r
+                                 RequestInProgress = 0;\r
+\r
+                               Endpoint_ClearSETUP();\r
+\r
+                               /* Write the request response bytes */\r
+                               Endpoint_Write_Byte(TMCRequestStatus);\r
+                               Endpoint_Write_Byte(0);\r
+                               \r
+                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();                            \r

                        }\r
                        \r
                        break;\r
                case Req_GetCapabilities:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
                        {\r
                        }\r
                        \r
                        break;\r
                case Req_GetCapabilities:\r
                        if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))\r
                        {\r

-                       \r
+                               Endpoint_ClearSETUP();\r
+                                       \r
+                               /* Write the device capabilities to the control endpoint */\r
+                               Endpoint_Write_Control_Stream_LE(&Capabilities, sizeof(TMC_Capabilities_t));                            \r
+                               Endpoint_ClearOUT();\r

                        }\r
                        \r
                        break;\r
        }\r
 }\r
                        }\r
                        \r
                        break;\r
        }\r
 }\r

-       \r
+\r
+/** Function to manage TMC data transmission and reception to and from the host. */\r

 void TMC_Task(void)\r
 {\r
        /* Device must be connected and configured for the task to run */\r
        if (USB_DeviceState != DEVICE_STATE_Configured)\r
          return;\r
 void TMC_Task(void)\r
 {\r
        /* Device must be connected and configured for the task to run */\r
        if (USB_DeviceState != DEVICE_STATE_Configured)\r
          return;\r

+       \r
+       TMC_MessageHeader_t MessageHeader;\r
+       \r
+       /* Try to read in a TMC message from the interface, process if one is available */\r
+       if (ReadTMCHeader(&MessageHeader))\r
+       {\r
+               /* Indicate busy */\r
+               LEDs_SetAllLEDs(LEDMASK_USB_BUSY);\r
+               \r
+               switch (MessageHeader.MessageID)\r
+               {\r
+                       case TMC_MESSAGEID_DEV_DEP_MSG_OUT:\r
+                               Endpoint_Discard_Stream(MessageHeader.TransferSize, StreamCallback_AbortOUTOnRequest);\r
+                               Endpoint_ClearOUT();\r
+                               break;\r
+                       case TMC_MESSAGEID_DEV_DEP_MSG_IN:\r
+                               Endpoint_ClearOUT();\r
+\r
+                               MessageHeader.TransferSize = 3;\r
+                               WriteTMCHeader(&MessageHeader);\r
+\r
+                               Endpoint_Write_Stream_LE("TMC", 3, StreamCallback_AbortINOnRequest);\r
+                               Endpoint_ClearIN();\r
+                               break;\r
+                       default:\r
+                               Endpoint_StallTransaction();\r
+                               break;\r
+               }\r
+\r
+               LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
+       }\r
+       \r
+       /* All pending data has been processed - reset the data abort flags */\r
+       IsTMCBulkINReset  = false;\r
+       IsTMCBulkOUTReset = false;\r
+}\r
+\r
+/** Attempts to read in the TMC message header from the TMC interface.\r
+ *\r
+ *  \param[out] MessageHeader  Pointer to a location where the read header (if any) should be stored\r
+ *\r
+ *  \return Boolean true if a header was read, false otherwise\r
+ */\r
+bool ReadTMCHeader(TMC_MessageHeader_t* const MessageHeader)\r
+{\r
+       /* Select the Data Out endpoint */\r
+       Endpoint_SelectEndpoint(TMC_OUT_EPNUM);\r
+       \r
+       /* Abort if no command has been sent from the host */\r
+       if (!(Endpoint_IsOUTReceived()))\r
+         return false;\r
+       \r
+       /* Read in the header of the command from the host */\r
+       Endpoint_Read_Stream_LE(MessageHeader, sizeof(TMC_MessageHeader_t), StreamCallback_AbortOUTOnRequest);\r
+\r
+       /* Store the new command tag value for later use */\r
+       CurrentTransferTag = MessageHeader->Tag;\r
+       \r
+       /* Indicate if the command has been aborted or not */\r
+       return !(IsTMCBulkOUTReset);\r
+}\r
+\r
+bool WriteTMCHeader(TMC_MessageHeader_t* const MessageHeader)\r
+{\r
+       /* Compute the next transfer tag value, must be between 1 and 254 */\r
+       if (++CurrentTransferTag == 0xFF)\r
+         CurrentTransferTag = 1;\r
+\r
+       /* Set the message tag of the command header */\r
+       MessageHeader->Tag        =  CurrentTransferTag;\r
+       MessageHeader->InverseTag = ~CurrentTransferTag;\r
+\r
+       /* Select the Data In endpoint */\r
+       Endpoint_SelectEndpoint(TMC_IN_EPNUM);\r
+\r
+       /* Send the command header to the host */\r
+       Endpoint_Write_Stream_LE(MessageHeader, sizeof(TMC_MessageHeader_t), StreamCallback_AbortINOnRequest);\r
+\r
+       /* Indicate if the command has been aborted or not */\r
+       return !(IsTMCBulkINReset);\r
+}\r
+\r
+/** Stream callback function for the Endpoint stream write functions. This callback will abort the current stream transfer\r
+ *  if a TMC Abort Bulk IN request has been issued to the control endpoint.\r
+ */\r
+uint8_t StreamCallback_AbortINOnRequest(void)\r
+{      \r
+       /* Abort if a TMC Bulk Data IN abort was received */\r
+       if (IsTMCBulkINReset)\r
+         return STREAMCALLBACK_Abort;\r
+       \r
+       /* Continue with the current stream operation */\r
+       return STREAMCALLBACK_Continue;\r
+}\r
+\r
+/** Stream callback function for the Endpoint stream read functions. This callback will abort the current stream transfer\r
+ *  if a TMC Abort Bulk OUT request has been issued to the control endpoint.\r
+ */\r
+uint8_t StreamCallback_AbortOUTOnRequest(void)\r
+{      \r
+       /* Abort if a TMC Bulk Data IN abort was received */\r
+       if (IsTMCBulkOUTReset)\r
+         return STREAMCALLBACK_Abort;\r
+       \r
+       /* Continue with the current stream operation */\r
+       return STREAMCALLBACK_Continue;\r

 }\r
 }\r