476 lines
14 KiB
C
476 lines
14 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2017.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, distribute, and sell this
|
|
software and its documentation for any purpose is hereby granted
|
|
without fee, provided that the above copyright notice appear in
|
|
all copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of the author not be used in
|
|
advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
|
|
The author disclaims 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 "TestAndMeasurement.h"
|
|
|
|
/** Contains the (usually static) capabilities of the TMC device. This table is requested by the
|
|
* host upon enumeration to give it information on what features of the Test and Measurement USB
|
|
* Class the device supports.
|
|
*/
|
|
TMC_Capabilities_t Capabilities =
|
|
{
|
|
.Status = TMC_STATUS_SUCCESS,
|
|
.TMCVersion = VERSION_BCD(1.00),
|
|
|
|
.Interface =
|
|
{
|
|
.ListenOnly = false,
|
|
.TalkOnly = false,
|
|
.PulseIndicateSupported = false,
|
|
},
|
|
|
|
.Device =
|
|
{
|
|
.SupportsAbortINOnMatch = false,
|
|
},
|
|
};
|
|
|
|
/** Current TMC control request that is being processed */
|
|
static uint8_t RequestInProgress = 0;
|
|
|
|
/** Stream callback abort flag for bulk IN data */
|
|
static bool IsTMCBulkINReset = false;
|
|
|
|
/** Stream callback abort flag for bulk OUT data */
|
|
static bool IsTMCBulkOUTReset = false;
|
|
|
|
/** Last used tag value for data transfers */
|
|
static uint8_t CurrentTransferTag = 0;
|
|
|
|
/** Length of last data transfer, for reporting to the host in case an in-progress transfer is aborted */
|
|
static uint16_t LastTransferLength = 0;
|
|
|
|
/** Buffer to hold the next message to sent to the TMC host */
|
|
static uint8_t NextResponseBuffer[64];
|
|
|
|
/** Indicates the length of the next response to send */
|
|
static uint8_t NextResponseLen;
|
|
|
|
/** Main program entry point. This routine contains the overall program flow, including initial
|
|
* setup of all components and the main program loop.
|
|
*/
|
|
int main(void)
|
|
{
|
|
SetupHardware();
|
|
|
|
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
|
|
GlobalInterruptEnable();
|
|
|
|
for (;;)
|
|
{
|
|
TMC_Task();
|
|
USB_USBTask();
|
|
}
|
|
}
|
|
|
|
/** Configures the board hardware and chip peripherals for the demo's functionality. */
|
|
void SetupHardware(void)
|
|
{
|
|
#if (ARCH == ARCH_AVR8)
|
|
/* Disable watchdog if enabled by bootloader/fuses */
|
|
MCUSR &= ~(1 << WDRF);
|
|
wdt_disable();
|
|
|
|
/* Disable clock division */
|
|
clock_prescale_set(clock_div_1);
|
|
#elif (ARCH == ARCH_XMEGA)
|
|
/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
|
|
XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
|
|
XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
|
|
|
|
/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
|
|
XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
|
|
XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
|
|
|
|
PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
|
|
#endif
|
|
|
|
/* Hardware Initialization */
|
|
LEDs_Init();
|
|
USB_Init();
|
|
}
|
|
|
|
/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
|
|
* starts the library USB task to begin the enumeration and USB management process.
|
|
*/
|
|
void EVENT_USB_Device_Connect(void)
|
|
{
|
|
LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
|
|
}
|
|
|
|
/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
|
|
* the status LEDs and stops the USB management and CDC management tasks.
|
|
*/
|
|
void EVENT_USB_Device_Disconnect(void)
|
|
{
|
|
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
|
|
}
|
|
|
|
/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
|
|
* of the USB device after enumeration - the device endpoints are configured and the CDC management task started.
|
|
*/
|
|
void EVENT_USB_Device_ConfigurationChanged(void)
|
|
{
|
|
bool ConfigSuccess = true;
|
|
|
|
/* Setup TMC In, Out and Notification Endpoints */
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, TMC_IO_EPSIZE, 1);
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_IN_EPADDR, EP_TYPE_BULK, TMC_IO_EPSIZE, 1);
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(TMC_OUT_EPADDR, EP_TYPE_BULK, TMC_IO_EPSIZE, 1);
|
|
|
|
/* Indicate endpoint configuration success or failure */
|
|
LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
|
|
}
|
|
|
|
/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
|
|
* the device from the USB host before passing along unhandled control requests to the library for processing
|
|
* internally.
|
|
*/
|
|
void EVENT_USB_Device_ControlRequest(void)
|
|
{
|
|
uint8_t TMCRequestStatus = TMC_STATUS_SUCCESS;
|
|
|
|
/* Process TMC specific control requests */
|
|
switch (USB_ControlRequest.bRequest)
|
|
{
|
|
case Req_InitiateAbortBulkOut:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
|
|
{
|
|
/* Check that no split transaction is already in progress and the data transfer tag is valid */
|
|
if (RequestInProgress != 0)
|
|
{
|
|
TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;
|
|
}
|
|
else if (USB_ControlRequest.wValue != CurrentTransferTag)
|
|
{
|
|
TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;
|
|
}
|
|
else
|
|
{
|
|
/* Indicate that all in-progress/pending data OUT requests should be aborted */
|
|
IsTMCBulkOUTReset = true;
|
|
|
|
/* Save the split request for later checking when a new request is received */
|
|
RequestInProgress = Req_InitiateAbortBulkOut;
|
|
}
|
|
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the request response byte */
|
|
Endpoint_Write_8(TMCRequestStatus);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case Req_CheckAbortBulkOutStatus:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
|
|
{
|
|
/* Check that an ABORT BULK OUT transaction has been requested and that the request has completed */
|
|
if (RequestInProgress != Req_InitiateAbortBulkOut)
|
|
TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
|
|
else if (IsTMCBulkOUTReset)
|
|
TMCRequestStatus = TMC_STATUS_PENDING;
|
|
else
|
|
RequestInProgress = 0;
|
|
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the request response bytes */
|
|
Endpoint_Write_8(TMCRequestStatus);
|
|
Endpoint_Write_16_LE(0);
|
|
Endpoint_Write_32_LE(LastTransferLength);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case Req_InitiateAbortBulkIn:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
|
|
{
|
|
/* Check that no split transaction is already in progress and the data transfer tag is valid */
|
|
if (RequestInProgress != 0)
|
|
{
|
|
TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;
|
|
}
|
|
else if (USB_ControlRequest.wValue != CurrentTransferTag)
|
|
{
|
|
TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;
|
|
}
|
|
else
|
|
{
|
|
/* Indicate that all in-progress/pending data IN requests should be aborted */
|
|
IsTMCBulkINReset = true;
|
|
|
|
/* Save the split request for later checking when a new request is received */
|
|
RequestInProgress = Req_InitiateAbortBulkIn;
|
|
}
|
|
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the request response bytes */
|
|
Endpoint_Write_8(TMCRequestStatus);
|
|
Endpoint_Write_8(CurrentTransferTag);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case Req_CheckAbortBulkInStatus:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
|
|
{
|
|
/* Check that an ABORT BULK IN transaction has been requested and that the request has completed */
|
|
if (RequestInProgress != Req_InitiateAbortBulkIn)
|
|
TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
|
|
else if (IsTMCBulkINReset)
|
|
TMCRequestStatus = TMC_STATUS_PENDING;
|
|
else
|
|
RequestInProgress = 0;
|
|
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the request response bytes */
|
|
Endpoint_Write_8(TMCRequestStatus);
|
|
Endpoint_Write_16_LE(0);
|
|
Endpoint_Write_32_LE(LastTransferLength);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case Req_InitiateClear:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
/* Check that no split transaction is already in progress */
|
|
if (RequestInProgress != 0)
|
|
{
|
|
Endpoint_Write_8(TMC_STATUS_SPLIT_IN_PROGRESS);
|
|
}
|
|
else
|
|
{
|
|
/* Indicate that all in-progress/pending data IN and OUT requests should be aborted */
|
|
IsTMCBulkINReset = true;
|
|
IsTMCBulkOUTReset = true;
|
|
|
|
/* Save the split request for later checking when a new request is received */
|
|
RequestInProgress = Req_InitiateClear;
|
|
}
|
|
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the request response byte */
|
|
Endpoint_Write_8(TMCRequestStatus);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case Req_CheckClearStatus:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
/* Check that a CLEAR transaction has been requested and that the request has completed */
|
|
if (RequestInProgress != Req_InitiateClear)
|
|
TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
|
|
else if (IsTMCBulkINReset || IsTMCBulkOUTReset)
|
|
TMCRequestStatus = TMC_STATUS_PENDING;
|
|
else
|
|
RequestInProgress = 0;
|
|
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the request response bytes */
|
|
Endpoint_Write_8(TMCRequestStatus);
|
|
Endpoint_Write_8(0);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case Req_GetCapabilities:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
/* Write the device capabilities to the control endpoint */
|
|
Endpoint_Write_Control_Stream_LE(&Capabilities, sizeof(TMC_Capabilities_t));
|
|
Endpoint_ClearOUT();
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ProcessSentMessage(uint8_t* const Data, const uint8_t Length)
|
|
{
|
|
if (strncmp((char*)Data, "*IDN?", 5) == 0)
|
|
strcpy((char*)NextResponseBuffer, "LUFA TMC DEMO");
|
|
|
|
NextResponseLen = strlen((char*)NextResponseBuffer);
|
|
}
|
|
|
|
uint8_t GetNextMessage(uint8_t* const Data)
|
|
{
|
|
strcpy((char*)NextResponseBuffer, "LUFA TMC DEMO");
|
|
|
|
NextResponseLen = strlen((char*)NextResponseBuffer);
|
|
// ---
|
|
uint8_t DataLen = MIN(NextResponseLen, 64);
|
|
|
|
strlcpy((char*)Data, (char*)NextResponseBuffer, DataLen);
|
|
|
|
return DataLen;
|
|
}
|
|
|
|
/** Function to manage TMC data transmission and reception to and from the host. */
|
|
void TMC_Task(void)
|
|
{
|
|
/* Device must be connected and configured for the task to run */
|
|
if (USB_DeviceState != DEVICE_STATE_Configured)
|
|
return;
|
|
|
|
TMC_MessageHeader_t MessageHeader;
|
|
uint8_t MessagePayload[128];
|
|
|
|
/* Try to read in a TMC message from the interface, process if one is available */
|
|
if (ReadTMCHeader(&MessageHeader))
|
|
{
|
|
/* Indicate busy */
|
|
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
|
|
|
|
switch (MessageHeader.MessageID)
|
|
{
|
|
case TMC_MESSAGEID_DEV_DEP_MSG_OUT:
|
|
LastTransferLength = 0;
|
|
while (Endpoint_Read_Stream_LE(MessagePayload, MIN(MessageHeader.TransferSize, sizeof(MessagePayload)), &LastTransferLength) ==
|
|
ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
if (IsTMCBulkOUTReset)
|
|
break;
|
|
}
|
|
|
|
Endpoint_ClearOUT();
|
|
|
|
ProcessSentMessage(MessagePayload, LastTransferLength);
|
|
break;
|
|
case TMC_MESSAGEID_DEV_DEP_MSG_IN:
|
|
Endpoint_ClearOUT();
|
|
|
|
MessageHeader.TransferSize = GetNextMessage(MessagePayload);
|
|
MessageHeader.MessageIDSpecific.DeviceOUT.LastMessageTransaction = true;
|
|
WriteTMCHeader(&MessageHeader);
|
|
|
|
LastTransferLength = 0;
|
|
while (Endpoint_Write_Stream_LE(MessagePayload, MessageHeader.TransferSize, &LastTransferLength) ==
|
|
ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
if (IsTMCBulkINReset)
|
|
break;
|
|
}
|
|
|
|
Endpoint_ClearIN();
|
|
break;
|
|
default:
|
|
Endpoint_StallTransaction();
|
|
break;
|
|
}
|
|
|
|
LEDs_SetAllLEDs(LEDMASK_USB_READY);
|
|
}
|
|
|
|
/* All pending data has been processed - reset the data abort flags */
|
|
IsTMCBulkINReset = false;
|
|
IsTMCBulkOUTReset = false;
|
|
}
|
|
|
|
/** Attempts to read in the TMC message header from the TMC interface.
|
|
*
|
|
* \param[out] MessageHeader Pointer to a location where the read header (if any) should be stored
|
|
*
|
|
* \return Boolean \c true if a header was read, \c false otherwise
|
|
*/
|
|
bool ReadTMCHeader(TMC_MessageHeader_t* const MessageHeader)
|
|
{
|
|
uint16_t BytesTransferred;
|
|
uint8_t ErrorCode;
|
|
|
|
/* Select the Data Out endpoint */
|
|
Endpoint_SelectEndpoint(TMC_OUT_EPADDR);
|
|
|
|
/* Abort if no command has been sent from the host */
|
|
if (!(Endpoint_IsOUTReceived()))
|
|
return false;
|
|
|
|
/* Read in the header of the command from the host */
|
|
BytesTransferred = 0;
|
|
while ((ErrorCode = Endpoint_Read_Stream_LE(MessageHeader, sizeof(TMC_MessageHeader_t), &BytesTransferred)) ==
|
|
ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
if (IsTMCBulkOUTReset)
|
|
break;
|
|
}
|
|
|
|
/* Store the new command tag value for later use */
|
|
CurrentTransferTag = MessageHeader->Tag;
|
|
|
|
/* Indicate if the command has been aborted or not */
|
|
return (!(IsTMCBulkOUTReset) && (ErrorCode == ENDPOINT_RWSTREAM_NoError));
|
|
}
|
|
|
|
bool WriteTMCHeader(TMC_MessageHeader_t* const MessageHeader)
|
|
{
|
|
uint16_t BytesTransferred;
|
|
uint8_t ErrorCode;
|
|
|
|
/* Set the message tag of the command header */
|
|
MessageHeader->Tag = CurrentTransferTag;
|
|
MessageHeader->InverseTag = ~CurrentTransferTag;
|
|
|
|
/* Select the Data In endpoint */
|
|
Endpoint_SelectEndpoint(TMC_IN_EPADDR);
|
|
|
|
/* Send the command header to the host */
|
|
BytesTransferred = 0;
|
|
while ((ErrorCode = Endpoint_Write_Stream_LE(MessageHeader, sizeof(TMC_MessageHeader_t), &BytesTransferred)) ==
|
|
ENDPOINT_RWSTREAM_IncompleteTransfer)
|
|
{
|
|
if (IsTMCBulkINReset)
|
|
break;
|
|
}
|
|
|
|
/* Indicate if the command has been aborted or not */
|
|
return (!(IsTMCBulkINReset) && (ErrorCode == ENDPOINT_RWSTREAM_NoError));
|
|
}
|
|
|