int GSkipBaseDevice::OSClearMeasurementPacketQueue()
{
int nReturn = 0;
if (LockDevice(1) && IsOKToUse())
{
nReturn = local_ClearPacketQueue(this, kMeasurementPipe);
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nReturn;
}
int GSkipBaseDevice::OSClearCmdRespPacketQueue()
{
int nReturn = 0;
if (LockDevice(1) && IsOKToUse())
{
nReturn = local_ClearPacketQueue(this, kCommandPipe);
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nReturn;
}
int GSkipBaseDevice::OSReadCmdRespPackets(void * pBuffer, int * pIONumPackets, int nBufferSizeInPackets)
{
int nReturn = 0;
if (LockDevice(1) && IsOKToUse())
{
nReturn = local_ReadPackets(this, pBuffer, pIONumPackets, nBufferSizeInPackets, kCommandPipe);
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nReturn;
}
int GSkipBaseDevice::OSCmdRespPacketsAvailable(void)
{
int nReturn = 0;
if (LockDevice(1) && IsOKToUse())
{
nReturn = local_PacketsAvailable(this, kCommandPipe);
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nReturn;
}
int GSkipBaseDevice::OSClose(void)
{
if (LockDevice(1) && IsOKToUse())
{
TUSBBulkDevice usbDevice = static_cast<TUSBBulkDevice>(GetOSData());
if ((usbDevice != NULL) && IsOpen())
VST_CloseUSBPort((VST_USBBulkDevice *)usbDevice);
UnlockDevice();
}
else
GSTD_ASSERT(0);
return kResponse_OK;
}
void GSkipBaseDevice::OSDestroy(void)
{
if (LockDevice(1) && IsOKToUse())
{
TUSBBulkDevice usbDevice = static_cast<TUSBBulkDevice>(GetOSData());
if (usbDevice != NULL)
{
VST_CloseUSBPort((VST_USBBulkDevice *)usbDevice);
VST_ReleaseUSBBulkDevice((VST_USBBulkDevice *)usbDevice);
}
UnlockDevice();
}
else
GSTD_ASSERT(0);
}
int GSkipBaseDevice::OSMeasurementPacketsAvailable(unsigned char *pNumMeasurementsInLastPacket)
{
int nReturn = 0;
if (LockDevice(1) && IsOKToUse())
{
nReturn = local_PacketsAvailable(this, kMeasurementPipe);
if (pNumMeasurementsInLastPacket != NULL)
*pNumMeasurementsInLastPacket = local_NumLastMeasurements(this);
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nReturn;
}
int GSkipBaseDevice::OSClearIO(void)
{
int nResult = kResponse_Error;
if (LockDevice(1) && IsOKToUse())
{
nResult = OSClearMeasurementPacketQueue();
if (nResult != kResponse_Error)
nResult = GSkipBaseDevice::OSClearCmdRespPacketQueue();
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nResult;
}
int GSkipBaseDevice::OSOpen(GPortRef * /*pPortRef*/)
{
int nResult = kResponse_Error;
if (LockDevice(1) && IsOKToUse())
{
TUSBBulkDevice usbDevice = static_cast<TUSBBulkDevice>(GetOSData());
// port may be NULL if initialization failed
if (usbDevice == NULL)
return kResponse_Error;
int err = VST_OpenUSBPortForIO((VST_USBBulkDevice *)usbDevice);
if (err == (int)kCFM_IOExclusiveAccess)
{
// If another app (including Classic) has the device we
// can simply retry a few times. The driver should be able to get a lock
// on the device at some point.
int nTry = 0;
while ((err == (int)kCFM_IOExclusiveAccess) && (nTry < 4))
{
err = VST_OpenUSBPortForIO((VST_USBBulkDevice *)usbDevice);
nTry++;
}
}
if (err == 0)
nResult = kResponse_OK;
else
{
cppsstream ssErr;
ssErr << "GUSBDirectTempDevice:OSOpen -- Error: " << err;
GSTD_LOG(ssErr.str());
}
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nResult;
}
int GSkipBaseDevice::OSWriteCmdPackets(void * pBuffer, int nNumPackets)
{
int nResult = kResponse_Error;
UInt32 nIONumBytes = nNumPackets * sizeof(GSkipPacket);
if (LockDevice(1) && IsOKToUse())
{
TUSBBulkDevice usbDevice = static_cast<TUSBBulkDevice>(GetOSData());
if (usbDevice != NULL)
{
int err = VST_WriteBytes((VST_USBBulkDevice *)usbDevice, pBuffer, nIONumBytes);
if (err == 0)
nResult = kResponse_OK;
}
UnlockDevice();
}
else
GSTD_ASSERT(0);
return nResult;
}
long GSkipDevice::SendInitCmdAndGetResponse(
void *pParams, //[in] ptr to cmd specific parameter block, may be NULL.
long nParamBytes, //[in] # of bytes in (*pParams).
void *pRespBuf, //[out] ptr to destination buffer, may be NULL.
long *pnRespBytes, //[in, out] size of of dest buffer on input, size of response on output, may be NULL if pRespBuf is NULL.
long nTimeoutMs /* = 1000 */,//[in] # of milliseconds to wait before giving up.
bool *pExitFlag /* = NULL */)//[in] ptr to flag that another thread can set to force early exit.
// THIS FLAG MUST BE FALSE FOR THIS ROUTINE TO RUN.
// Ignore this if NULL.
{
long nResult = kResponse_Error;
unsigned char initStatus;
long initStatusLength = sizeof(initStatus);
if (LockDevice(1) && IsOKToUse())
{
nResult = kResponse_OK;
long maxNumRetries = (nTimeoutMs + SKIP_TIMEOUT_MS_CMD_ID_INIT_WITH_BUSY_STATUS - 1)/SKIP_TIMEOUT_MS_CMD_ID_INIT_WITH_BUSY_STATUS;
if (maxNumRetries > 1)
nTimeoutMs = SKIP_TIMEOUT_MS_CMD_ID_INIT_WITH_BUSY_STATUS;
bool bSuccess = false;
long numRetries;
GSkipInitParams initParams;
initParams.reportErrorWhilePoweringUpFlag = 1;
if (pParams)
GSTD_ASSERT(nParamBytes == sizeof(initParams));
else
{
pParams = &initParams;
nParamBytes = sizeof(initParams);
}
//Send multiple init commands until the timeout is reached because Skip may ignore commands sent before it is done
//powering up.
for (numRetries = 0; (numRetries < maxNumRetries) && (kResponse_OK == nResult) && (!bSuccess); numRetries++)
{
nResult = SendCmd(SKIP_CMD_ID_INIT, pParams, nParamBytes);
if (kResponse_OK == nResult)
{
unsigned int nTimeCmdSent = GUtils::OSGetTimeStamp();
initStatusLength = sizeof(initStatus);
initStatus = SKIP_STATUS_CMD_NOT_SUPPORTED;
if (kResponse_OK == GetInitCmdResponse(&initStatus, &initStatusLength, nTimeoutMs, pExitFlag))
bSuccess = true;
else if ((sizeof(initStatus) == initStatusLength) && (SKIP_STATUS_ERROR_SLAVE_POWERUP_INIT == initStatus))
{
unsigned int nTimeNow = GUtils::OSGetTimeStamp();
unsigned int nElapsedTimeMs = nTimeNow - nTimeCmdSent;
if (nElapsedTimeMs < nTimeoutMs)
GUtils::Sleep(nTimeoutMs - nElapsedTimeMs);
}
}
else
initStatusLength = 0;
}
if (!bSuccess)
nResult = kResponse_Error;
UnlockDevice();
}
else
GSTD_ASSERT(0); // Can't use this device -- some other thread has it open!
if (pRespBuf && pnRespBytes)
{
if (((*pnRespBytes) >= initStatusLength) && (initStatusLength > 0))
{
(*pnRespBytes) = initStatusLength;
memcpy(pRespBuf, &initStatus, initStatusLength);
}
else
(*pnRespBytes) = 0;
}
return nResult;
}
