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438 lines
14 KiB
438 lines
14 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2011.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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#include "TestAndMeasurement.h"
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/** Contains the (usually static) capabilities of the TMC device. This table is requested by the
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* host upon enumeration to give it information on what features of the Test and Measurement USB
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* Class the device supports.
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*/
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TMC_Capabilities_t Capabilities =
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{
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.Status = TMC_STATUS_SUCCESS,
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.TMCVersion = VERSION_BCD(1.00),
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.Interface =
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{
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.ListenOnly = false,
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.TalkOnly = false,
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.PulseIndicateSupported = false,
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},
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.Device =
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{
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.SupportsAbortINOnMatch = false,
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},
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};
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/** Current TMC control request that is being processed */
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static uint8_t RequestInProgress = 0;
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/** Stream callback abort flag for bulk IN data */
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static bool IsTMCBulkINReset = false;
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/** Stream callback abort flag for bulk OUT data */
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static bool IsTMCBulkOUTReset = false;
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/** Last used tag value for data transfers */
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static uint8_t CurrentTransferTag = 0;
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/** Length of last data transfer, for reporting to the host in case an in-progress transfer is aborted */
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static uint32_t LastTransferLength = 0;
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/** Main program entry point. This routine contains the overall program flow, including initial
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* setup of all components and the main program loop.
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*/
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int main(void)
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{
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SetupHardware();
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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sei();
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for (;;)
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{
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TMC_Task();
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USB_USBTask();
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}
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}
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/** Configures the board hardware and chip peripherals for the demo's functionality. */
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void SetupHardware(void)
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{
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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wdt_disable();
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/* Disable clock division */
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clock_prescale_set(clock_div_1);
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/* Hardware Initialization */
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LEDs_Init();
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USB_Init();
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}
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/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
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* starts the library USB task to begin the enumeration and USB management process.
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*/
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void EVENT_USB_Device_Connect(void)
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{
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LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
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}
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/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
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* the status LEDs and stops the USB management and CDC management tasks.
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*/
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void EVENT_USB_Device_Disconnect(void)
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{
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LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
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}
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/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
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* of the USB device after enumeration - the device endpoints are configured and the CDC management task started.
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*/
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void EVENT_USB_Device_ConfigurationChanged(void)
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{
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bool ConfigSuccess = true;
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/* Setup TMC In, Out and Notification Endpoints */
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ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT, ENDPOINT_DIR_IN,
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TMC_IO_EPSIZE, ENDPOINT_BANK_SINGLE);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_IN_EPNUM, EP_TYPE_BULK, ENDPOINT_DIR_IN,
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TMC_IO_EPSIZE, ENDPOINT_BANK_SINGLE);
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ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_OUT_EPNUM, EP_TYPE_BULK, ENDPOINT_DIR_OUT,
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TMC_IO_EPSIZE, ENDPOINT_BANK_SINGLE);
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/* Indicate endpoint configuration success or failure */
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LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
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}
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/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
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* the device from the USB host before passing along unhandled control requests to the library for processing
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* internally.
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*/
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void EVENT_USB_Device_ControlRequest(void)
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{
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uint8_t TMCRequestStatus = TMC_STATUS_SUCCESS;
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/* Process TMC specific control requests */
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switch (USB_ControlRequest.bRequest)
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{
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case Req_InitiateAbortBulkOut:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
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{
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/* Check that no split transaction is already in progress and the data transfer tag is valid */
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if (RequestInProgress != 0)
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{
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TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;
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}
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else if (USB_ControlRequest.wValue != CurrentTransferTag)
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{
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TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;
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}
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else
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{
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/* Indicate that all in-progress/pending data OUT requests should be aborted */
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IsTMCBulkOUTReset = true;
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/* Save the split request for later checking when a new request is received */
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RequestInProgress = Req_InitiateAbortBulkOut;
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}
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Endpoint_ClearSETUP();
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/* Write the request response byte */
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Endpoint_Write_Byte(TMCRequestStatus);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case Req_CheckAbortBulkOutStatus:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
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{
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/* Check that an ABORT BULK OUT transaction has been requested and that the request has completed */
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if (RequestInProgress != Req_InitiateAbortBulkOut)
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TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
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else if (IsTMCBulkOUTReset)
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TMCRequestStatus = TMC_STATUS_PENDING;
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else
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RequestInProgress = 0;
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Endpoint_ClearSETUP();
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/* Write the request response bytes */
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Endpoint_Write_Byte(TMCRequestStatus);
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Endpoint_Write_Word_LE(0);
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Endpoint_Write_DWord_LE(LastTransferLength);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case Req_InitiateAbortBulkIn:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
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{
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/* Check that no split transaction is already in progress and the data transfer tag is valid */
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if (RequestInProgress != 0)
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{
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TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;
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}
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else if (USB_ControlRequest.wValue != CurrentTransferTag)
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{
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TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;
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}
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else
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{
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/* Indicate that all in-progress/pending data IN requests should be aborted */
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IsTMCBulkINReset = true;
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/* Save the split request for later checking when a new request is received */
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RequestInProgress = Req_InitiateAbortBulkIn;
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}
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Endpoint_ClearSETUP();
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/* Write the request response bytes */
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Endpoint_Write_Byte(TMCRequestStatus);
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Endpoint_Write_Byte(CurrentTransferTag);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case Req_CheckAbortBulkInStatus:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
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{
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/* Check that an ABORT BULK IN transaction has been requested and that the request has completed */
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if (RequestInProgress != Req_InitiateAbortBulkIn)
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TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
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else if (IsTMCBulkINReset)
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TMCRequestStatus = TMC_STATUS_PENDING;
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else
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RequestInProgress = 0;
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Endpoint_ClearSETUP();
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/* Write the request response bytes */
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Endpoint_Write_Byte(TMCRequestStatus);
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Endpoint_Write_Word_LE(0);
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Endpoint_Write_DWord_LE(LastTransferLength);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case Req_InitiateClear:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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/* Check that no split transaction is already in progress */
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if (RequestInProgress != 0)
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{
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Endpoint_Write_Byte(TMC_STATUS_SPLIT_IN_PROGRESS);
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}
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else
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{
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/* Indicate that all in-progress/pending data IN and OUT requests should be aborted */
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IsTMCBulkINReset = true;
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IsTMCBulkOUTReset = true;
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/* Save the split request for later checking when a new request is received */
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RequestInProgress = Req_InitiateClear;
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}
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Endpoint_ClearSETUP();
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/* Write the request response byte */
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Endpoint_Write_Byte(TMCRequestStatus);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case Req_CheckClearStatus:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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/* Check that a CLEAR transaction has been requested and that the request has completed */
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if (RequestInProgress != Req_InitiateClear)
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TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
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else if (IsTMCBulkINReset || IsTMCBulkOUTReset)
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TMCRequestStatus = TMC_STATUS_PENDING;
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else
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RequestInProgress = 0;
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Endpoint_ClearSETUP();
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/* Write the request response bytes */
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Endpoint_Write_Byte(TMCRequestStatus);
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Endpoint_Write_Byte(0);
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Endpoint_ClearIN();
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Endpoint_ClearStatusStage();
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}
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break;
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case Req_GetCapabilities:
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if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
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{
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Endpoint_ClearSETUP();
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/* Write the device capabilities to the control endpoint */
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Endpoint_Write_Control_Stream_LE(&Capabilities, sizeof(TMC_Capabilities_t));
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Endpoint_ClearOUT();
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}
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break;
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}
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}
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/** Function to manage TMC data transmission and reception to and from the host. */
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void TMC_Task(void)
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{
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/* Device must be connected and configured for the task to run */
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if (USB_DeviceState != DEVICE_STATE_Configured)
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return;
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TMC_MessageHeader_t MessageHeader;
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uint16_t BytesTransferred;
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/* Try to read in a TMC message from the interface, process if one is available */
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if (ReadTMCHeader(&MessageHeader))
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{
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/* Indicate busy */
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LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
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switch (MessageHeader.MessageID)
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{
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case TMC_MESSAGEID_DEV_DEP_MSG_OUT:
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BytesTransferred = 0;
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while (Endpoint_Discard_Stream(MessageHeader.TransferSize, &BytesTransferred) ==
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ENDPOINT_RWSTREAM_IncompleteTransfer)
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{
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if (IsTMCBulkOUTReset)
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break;
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}
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LastTransferLength = BytesTransferred;
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Endpoint_ClearOUT();
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break;
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case TMC_MESSAGEID_DEV_DEP_MSG_IN:
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Endpoint_ClearOUT();
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MessageHeader.TransferSize = 3;
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MessageHeader.MessageIDSpecific.DeviceOUT.LastMessageTransaction = true;
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WriteTMCHeader(&MessageHeader);
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BytesTransferred = 0;
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while (Endpoint_Write_Stream_LE("TMC", MessageHeader.TransferSize, &BytesTransferred) ==
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ENDPOINT_RWSTREAM_IncompleteTransfer)
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{
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if (IsTMCBulkINReset)
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break;
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}
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LastTransferLength = BytesTransferred;
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Endpoint_ClearIN();
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break;
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default:
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Endpoint_StallTransaction();
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break;
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}
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LEDs_SetAllLEDs(LEDMASK_USB_READY);
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}
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/* All pending data has been processed - reset the data abort flags */
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IsTMCBulkINReset = false;
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IsTMCBulkOUTReset = false;
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}
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/** Attempts to read in the TMC message header from the TMC interface.
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*
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* \param[out] MessageHeader Pointer to a location where the read header (if any) should be stored
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*
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* \return Boolean true if a header was read, false otherwise
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*/
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bool ReadTMCHeader(TMC_MessageHeader_t* const MessageHeader)
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{
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uint16_t BytesTransferred;
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/* Select the Data Out endpoint */
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Endpoint_SelectEndpoint(TMC_OUT_EPNUM);
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/* Abort if no command has been sent from the host */
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if (!(Endpoint_IsOUTReceived()))
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return false;
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/* Read in the header of the command from the host */
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BytesTransferred = 0;
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while (Endpoint_Read_Stream_LE(MessageHeader, sizeof(TMC_MessageHeader_t), &BytesTransferred) ==
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ENDPOINT_RWSTREAM_IncompleteTransfer)
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{
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if (IsTMCBulkOUTReset)
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break;
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}
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/* Store the new command tag value for later use */
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CurrentTransferTag = MessageHeader->Tag;
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/* Indicate if the command has been aborted or not */
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return !(IsTMCBulkOUTReset);
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}
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bool WriteTMCHeader(TMC_MessageHeader_t* const MessageHeader)
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{
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uint16_t BytesTransferred;
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/* Set the message tag of the command header */
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MessageHeader->Tag = CurrentTransferTag;
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MessageHeader->InverseTag = ~CurrentTransferTag;
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/* Select the Data In endpoint */
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Endpoint_SelectEndpoint(TMC_IN_EPNUM);
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/* Send the command header to the host */
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BytesTransferred = 0;
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while (Endpoint_Write_Stream_LE(MessageHeader, sizeof(TMC_MessageHeader_t), &BytesTransferred) ==
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ENDPOINT_RWSTREAM_IncompleteTransfer)
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{
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if (IsTMCBulkINReset)
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break;
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}
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/* Indicate if the command has been aborted or not */
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return !(IsTMCBulkINReset);
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}
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