long getTempKCalibrated(u6CalibrationInfo *caliInfo, int resolutionIndex, int gainIndex, int bits24, uint32 bytesTemp, double *kelvinTemp)
{
double value;
//convert to voltage first
if(getAinVoltCalibrated(caliInfo, resolutionIndex, gainIndex, bits24, bytesTemp, &value) == -1)
return -1;
*kelvinTemp = caliInfo->ccConstants[22]*value + caliInfo->ccConstants[23];
return 0;
}
long eAIN(HANDLE Handle, ue9CalibrationInfo *CalibrationInfo, long ChannelP, long ChannelN, double *Voltage, long Range, long Resolution, long Settling, long Binary, long Reserved1, long Reserved2)
{
uint8 IOType, Channel, AINM, AINH, ainGain;
uint16 bytesVT;
if( isCalibrationInfoValid(CalibrationInfo) == 0 )
{
printf("eAIN error: calibration information is required");
return -1;
}
if( Range == LJ_rgBIP5V )
ainGain = 8;
else if( Range == LJ_rgUNI5V )
ainGain = 0;
else if( Range == LJ_rgUNI2P5V )
ainGain = 1;
else if( Range == LJ_rgUNI1P25V )
ainGain = 2;
else if( Range == LJ_rgUNIP625V )
ainGain = 3;
else
{
printf("eAIN error: Invalid Range\n");
return -1;
}
if( ehSingleIO(Handle, 4, (uint8)ChannelP, ainGain, (uint8)Resolution, (uint8)Settling, &IOType, &Channel, NULL, &AINM, &AINH) < 0 )
return -1;
bytesVT = AINM + AINH*256;
if( Binary != 0 )
{
*Voltage = (double)bytesVT;
}
else
{
if( ChannelP == 133 || ChannelP == 141 )
{
if( getTempKCalibrated(CalibrationInfo, 0, bytesVT, Voltage) < 0 )
return -1;
}
else
{
if( getAinVoltCalibrated(CalibrationInfo, ainGain, (uint8)Resolution, bytesVT, Voltage) < 0 )
return -1;
}
}
return 0;
}
//Sends 1000 Feedback low-level commands to read digital IO and analog inputs.
//On the first send, the following are set: DAC0 to 2.5 volts, DAC1 to 3.5
//volts, and digital IOs to inputs.
int allIO(HANDLE hDevice, ue9CalibrationInfo *caliInfo)
{
uint8 sendBuff[34], recBuff[64], settlingTime;
uint8 numChannels; //Number of AIN channels, 0-16.
uint16 checksumTotal, bytesVoltage, ainMask;
int sendChars, recChars, i, j;
int initialize; //boolean to init. DAC and digital IO settings
int numIterations, valueDIPort;
long time, ainResolution;
double valueAIN[16];
numIterations = 1000;
initialize = 1;
time = 0;
numChannels = 8;
ainResolution = 12;
for( i = 0; i < 16; i++ )
valueAIN[i] = 9999.0;
settlingTime = 0;
ainMask = pow(2.0, numChannels) - 1;
sendBuff[1] = (uint8)(0xF8); //Command byte
sendBuff[2] = (uint8)(0x0E); //Number of data words
sendBuff[3] = (uint8)(0x00); //Extended command number
sendBuff[6] = 255; //FIOMask : setting the mask of all FIOs
sendBuff[7] = 0; //FIODir : setting all FIO directions to input
sendBuff[8] = 0; //FIOState : all FIO directions are input, so
// state writes do not apply
sendBuff[9] = 255; //EIOMask : setting the mask of all EIOs
sendBuff[10] = 0; //EIODir : setting all EIO directions to input
sendBuff[11] = 0; //EIOState : all EIO directions are input, so
// state writes do not apply
sendBuff[12] = 15; //CIOMask : setting the mask of all CIOs
sendBuff[13] = 0; //CIODirState : setting all CIO directions to input,
// state writes do not apply
sendBuff[14] = 7; //MIOMask : setting the mask of all MIOs
sendBuff[15] = 0; //MIODirState : setting all MIO directions to input,
// state writes do not apply
//Getting binary DAC0 value of 2.5 volts
if( getDacBinVoltCalibrated(caliInfo, 0, 2.500, &bytesVoltage) < 0 )
return -1;
//Setting the voltage of DAC0 to 2.5
sendBuff[16] = (uint8)(bytesVoltage & 255); //low bits of DAC0
sendBuff[17] = (uint8)(bytesVoltage/256) + 192; //high bits of DAC0
//(bit 7 : Enable,
// bit 6: Update)
//Getting binary DAC1 value of 3.5 volts
if( getDacBinVoltCalibrated(caliInfo, 1, 3.500, &bytesVoltage) < 0 )
return -1;
//Setting the voltage of DAC1 to 3.5 volts
sendBuff[18] = (uint8)(bytesVoltage & 255); //low bits of DAC1
sendBuff[19] = (uint8)(bytesVoltage/256) + 192; //high bits of DAC1
//(bit 7 : Enable,
// bit 6: Update)
//AINMask - reading the number of AINs specified by numChannels
sendBuff[20] = ainMask & 255; //AINMask (low byte)
sendBuff[21] = ainMask/256; //AINMask (high byte)
sendBuff[22] = 14; //AIN14ChannelNumber : setting to channel 14
sendBuff[23] = 15; //AIN15ChannelNumber : setting to channel 15
sendBuff[24] = ainResolution; //Resolution : Resolution specified by
// ainResolution
sendBuff[25] = settlingTime; //SettlingTime
//Setting all BipGains (Gain = 1, Bipolar = 1)
for( i = 26; i < 34; i++ )
sendBuff[i] = (uint8)(0x00);
extendedChecksum(sendBuff, 34);
time = getTickCount();
for( i = 0; i < numIterations; i++ )
{
//Sending command to UE9
sendChars = LJUSB_Write(hDevice, sendBuff, 34);
if( sendChars < 34 )
{
if( sendChars == 0 )
printf("Feedback error (Iteration %d) : write failed\n", i);
else
printf("Feedback error (Iteration %d) : did not write all of the buffer\n", i);
return -1;
}
//Reading response from UE9
recChars = LJUSB_Read(hDevice, recBuff, 64);
if( recChars < 64 )
{
if( recChars == 0 )
printf("Feedback error (Iteration %d) : read failed\n", i);
else
printf("Feedback error (Iteration %d) : did not read all of the buffer\n", i);
return -1;
}
checksumTotal = extendedChecksum16(recBuff, 64);
if( (uint8)((checksumTotal / 256) & 0xff) != recBuff[5] )
{
printf("Feedback error (Iteration %d) : read buffer has bad checksum16(MSB)\n", i);
return -1;
}
if( (uint8)(checksumTotal & 255) != recBuff[4] )
{
printf("Feedback error (Iteration %d) : read buffer has bad checksum16(LSB)\n", i);
return -1;
}
if( extendedChecksum8(recBuff) != recBuff[0] )
{
printf("Feedback error (Iteration %d) : read buffer has bad checksum8\n", i);
return -1;
}
if( recBuff[1] != (uint8)(0xF8) || recBuff[2] != (uint8)(0x1D) || recBuff[3] != (uint8)(0x00) )
{
printf("Feedback error (Iteration %d) : read buffer has wrong command bytes\n", i);
return -1;
}
for( j = 0; j < numChannels && j < 16; j++ )
getAinVoltCalibrated(caliInfo, 0x00, (uint8)ainResolution, recBuff[12 + j*2] + recBuff[13 + j*2]*256, &valueAIN[j]);
valueDIPort = recBuff[7] + recBuff[9]*256 + (recBuff[10] & 15)*65536 + (recBuff[11] & 7)*1048576;
if( initialize == 1 )
{
//Unsetting digital IO bit masks since we only want to read states now
sendBuff[6] = 0; //FIOMask
sendBuff[9] = 0; //EIOMask
sendBuff[12] = 0; //CIOMask
sendBuff[14] = 0; //MIOMask
//Turning off Update bit of DACs
sendBuff[17] = sendBuff[17] - 64; //high bits of DAC0
sendBuff[19] = sendBuff[19] - 64; //high bits of DAC1
extendedChecksum(sendBuff, 34);
initialize = 0;
}
}
time = getTickCount() - time;
printf("Milleseconds per iteration = %.3f\n", (double)time / (double)numIterations);
printf("\nDigital Input (FIO0-7, EIO0-7, CIO0-3, MIO0-2) = %d\n",valueDIPort);
printf("\nAIN readings from last iteration:\n");
for( j = 0; j < numChannels; j++ )
printf("%.3f\n", valueAIN[j]);
return 0;
}
long eAIN(HANDLE Handle, u6CalibrationInfo *CalibrationInfo, long ChannelP, long ChannelN, double *Voltage, long Range, long Resolution, long Settling, long Binary, long Reserved1, long Reserved2)
{
uint8 sendDataBuff[4], recDataBuff[5];
uint8 diff, gain, Errorcode, ErrorFrame;
uint32 bytesV;
if(isCalibrationInfoValid(CalibrationInfo) != 1)
{
printf("eAIN error: Invalid calibration information.\n");
return -1;
}
//Checking if acceptable positive channel
if(ChannelP < 0 || ChannelP > 143)
{
printf("eAIN error: Invalid ChannelP value.\n");
return -1;
}
//Checking if single ended or differential readin
if(ChannelN == 0 || ChannelN == 15)
{
//single ended reading
diff = 0;
}
else if((ChannelN&1) == 1 && ChannelN == ChannelP + 1)
{
//differential reading
diff = 1;
}
else
{
printf("eAIN error: Invalid ChannelN value.\n");
return -1;
}
if(Range == LJ_rgAUTO)
gain = 15;
else if(Range == LJ_rgBIP10V)
gain = 0;
else if(Range == LJ_rgBIP1V)
gain = 1;
else if(Range == LJ_rgBIPP1V)
gain = 2;
else if(Range == LJ_rgBIPP01V)
gain = 3;
else
{
printf("eAIN error: Invalid Range value\n");
return -1;
}
if(Resolution < 0 || Resolution > 13)
{
printf("eAIN error: Invalid Resolution value\n");
return -1;
}
if(Settling < 0 && Settling > 4)
{
printf("eAIN error: Invalid Settling value\n");
return -1;
}
/* Setting up Feedback command to read analog input */
sendDataBuff[0] = 3; //IOType is AIN24AR
sendDataBuff[1] = (uint8)ChannelP; //Positive channel
sendDataBuff[2] = (uint8)Resolution + gain*16; //Res Index (0-3), Gain Index (4-7)
sendDataBuff[3] = (uint8)Settling + diff*128; //Settling factor (0-2), Differential (7)
if(ehFeedback(Handle, sendDataBuff, 4, &Errorcode, &ErrorFrame, recDataBuff, 5) < 0)
return -1;
if(Errorcode)
return (long)Errorcode;
bytesV = recDataBuff[0] + ((uint32)recDataBuff[1])*256 + ((uint32)recDataBuff[2])*65536;
gain = recDataBuff[3]/16;
if(Binary != 0)
{
*Voltage = (double)bytesV;
}
else
{
if(ChannelP == 14)
{
if(getTempKCalibrated(CalibrationInfo, Resolution, gain, 1, bytesV, Voltage) < 0)
return -1;
}
else
{
gain = recDataBuff[3]/16;
if(getAinVoltCalibrated(CalibrationInfo, Resolution, gain, 1, bytesV, Voltage) < 0)
return -1;
}
}
return 0;
}
long getAinVoltUncalibrated(int resolutionIndex, int gainIndex, int bits24, uint32 bytesVolt, double *analogVolt)
{
return getAinVoltCalibrated(&U6_CALIBRATION_INFO_DEFAULT, resolutionIndex, gainIndex, bits24, bytesVolt, analogVolt);
}
//Reads the StreamData low-level function response in a loop.
//All voltages from the stream are stored in the voltages 2D array.
int StreamData_example(HANDLE hDevice, u6CalibrationInfo *caliInfo)
{
int recBuffSize;
recBuffSize = 14 + SamplesPerPacket*2;
int recChars, backLog;
int i, j, k, m, packetCounter, currChannel, scanNumber;
int totalPackets; //The total number of StreamData responses read
uint16 voltageBytes, checksumTotal;
long startTime, endTime;
int autoRecoveryOn;
int numDisplay; //Number of times to display streaming information
int numReadsPerDisplay; //Number of packets to read before displaying streaming information
int readSizeMultiplier; //Multiplier for the StreamData receive buffer size
int responseSize; //The number of bytes in a StreamData response (differs with SamplesPerPacket)
numDisplay = 6;
numReadsPerDisplay = 24;
readSizeMultiplier = 5;
responseSize = 14 + SamplesPerPacket*2;
/* Each StreamData response contains (SamplesPerPacket / NumChannels) * readSizeMultiplier
* samples for each channel.
* Total number of scans = (SamplesPerPacket / NumChannels) * readSizeMultiplier * numReadsPerDisplay * numDisplay
*/
double voltages[(SamplesPerPacket/NumChannels)*readSizeMultiplier*numReadsPerDisplay*numDisplay][NumChannels];
uint8 recBuff[responseSize*readSizeMultiplier];
packetCounter = 0;
currChannel = 0;
scanNumber = 0;
totalPackets = 0;
recChars = 0;
autoRecoveryOn = 0;
printf("Reading Samples...\n");
startTime = getTickCount();
for( i = 0; i < numDisplay; i++ )
{
for( j = 0; j < numReadsPerDisplay; j++ )
{
/* For USB StreamData, use Endpoint 3 for reads. You can read the multiple
* StreamData responses of 64 bytes only if SamplesPerPacket is 25 to help
* improve streaming performance. In this example this multiple is adjusted
* by the readSizeMultiplier variable.
*/
//Reading stream response from U6
recChars = LJUSB_Stream(hDevice, recBuff, responseSize*readSizeMultiplier);
if( recChars < responseSize*readSizeMultiplier )
{
if(recChars == 0)
printf("Error : read failed (StreamData).\n");
else
printf("Error : did not read all of the buffer, expected %d bytes but received %d(StreamData).\n", responseSize*readSizeMultiplier, recChars);
return -1;
}
//Checking for errors and getting data out of each StreamData response
for( m = 0; m < readSizeMultiplier; m++ )
{
totalPackets++;
checksumTotal = extendedChecksum16(recBuff + m*recBuffSize, recBuffSize);
if( (uint8)((checksumTotal >> 8) & 0xff) != recBuff[m*recBuffSize + 5] )
{
printf("Error : read buffer has bad checksum16(MSB) (StreamData).\n");
return -1;
}
if( (uint8)(checksumTotal & 0xff) != recBuff[m*recBuffSize + 4] )
{
printf("Error : read buffer has bad checksum16(LSB) (StreamData).\n");
return -1;
}
checksumTotal = extendedChecksum8(recBuff + m*recBuffSize);
if( checksumTotal != recBuff[m*recBuffSize] )
{
printf("Error : read buffer has bad checksum8 (StreamData).\n");
return -1;
}
if( recBuff[m*recBuffSize + 1] != (uint8)(0xF9) || recBuff[m*recBuffSize + 2] != 4 + SamplesPerPacket || recBuff[m*recBuffSize + 3] != (uint8)(0xC0) )
{
printf("Error : read buffer has wrong command bytes (StreamData).\n");
return -1;
}
if( recBuff[m*recBuffSize + 11] == 59 )
{
if( !autoRecoveryOn )
{
printf("\nU6 data buffer overflow detected in packet %d.\nNow using auto-recovery and reading buffered samples.\n", totalPackets);
autoRecoveryOn = 1;
}
}
else if( recBuff[m*recBuffSize + 11] == 60 )
{
printf("Auto-recovery report in packet %d: %d scans were dropped.\nAuto-recovery is now off.\n", totalPackets, recBuff[m*recBuffSize + 6] + recBuff[m*recBuffSize + 7]*256);
autoRecoveryOn = 0;
}
else if( recBuff[m*recBuffSize + 11] != 0 )
{
printf("Errorcode # %d from StreamData read.\n", (unsigned int)recBuff[11]);
return -1;
}
if( packetCounter != (int)recBuff[m*recBuffSize + 10] )
{
printf("PacketCounter (%d) does not match with with current packet count (%d)(StreamData).\n", recBuff[m*recBuffSize + 10], packetCounter);
return -1;
}
backLog = (int)recBuff[m*48 + 12 + SamplesPerPacket*2];
for( k = 12; k < (12 + SamplesPerPacket*2); k += 2 )
{
voltageBytes = (uint16)recBuff[m*recBuffSize + k] + (uint16)recBuff[m*recBuffSize + k+1]*256;
getAinVoltCalibrated(caliInfo, 1, 0, 0, voltageBytes, &(voltages[scanNumber][currChannel]));
currChannel++;
if( currChannel >= NumChannels )
{
currChannel = 0;
scanNumber++;
}
}
if(packetCounter >= 255)
packetCounter = 0;
else
packetCounter++;
}
}
printf("\nNumber of scans: %d\n", scanNumber);
printf("Total packets read: %d\n", totalPackets);
printf("Current PacketCounter: %d\n", ((packetCounter == 0) ? 255 : packetCounter-1));
printf("Current BackLog: %d\n", backLog);
for( k = 0; k < NumChannels; k++ )
printf(" AI%d: %.4f V\n", k, voltages[scanNumber - 1][k]);
}
endTime = getTickCount();
printf("\nRate of samples: %.0lf samples per second\n", (scanNumber*NumChannels)/((endTime - startTime)/1000.0));
printf("Rate of scans: %.0lf scans per second\n\n", scanNumber/((endTime - startTime)/1000.0));
return 0;
}
long eAIN(HANDLE Handle, u3CalibrationInfo *CalibrationInfo, long ConfigIO, long *DAC1Enable, long ChannelP, long ChannelN, double *Voltage, long Range, long Resolution, long Settling, long Binary, long Reserved1, long Reserved2)
{
uint8 sendDataBuff[3], recDataBuff[2];
uint8 FIOAnalog, EIOAnalog, curFIOAnalog, curEIOAnalog, curTCConfig;
uint8 settling, quicksample, Errorcode, ErrorFrame;
uint8 outDAC1Enable;
uint16 bytesVT;
long error;
double hwver;
int hv;
int isSpecialRange = 0;
if(isCalibrationInfoValid(CalibrationInfo) == 0)
{
printf("eAIN error: calibration information is required");
return -1;
}
hwver = CalibrationInfo->hardwareVersion;
hv = CalibrationInfo->highVoltage;
if(ChannelP < 0 || (ChannelP > 15 && ChannelP != 30 && ChannelP != 31))
{
printf("eAIN error: Invalid positive channel\n");
return -1;
}
if(ChannelN < 0 || (ChannelN > 15 && ChannelN != 30 && ChannelN != 31 && ChannelN != 32)
|| (hwver >= 1.30 && hv == 1 && ((ChannelP < 4 && ChannelN != 31 && ChannelN != 32)
|| ChannelN < 4)))
{
printf("eAIN error: Invalid negative channel\n");
return -1;
}
if (ChannelN == 32) {
isSpecialRange = 1;
ChannelN = 30; // Set to 30 for the feedback packet. We'll set it back to 32 for conversion.
}
if(ConfigIO != 0 && !(hwver >= 1.30 && hv == 1 && ChannelP < 4))
{
FIOAnalog = 0;
EIOAnalog = 0;
//Setting ChannelP and ChannelN channels to analog using
//FIOAnalog and EIOAnalog
if(ChannelP <= 7)
FIOAnalog = pow(2, ChannelP);
else if(ChannelP <= 15)
EIOAnalog = pow(2, (ChannelP - 8));
if(ChannelN <= 7)
FIOAnalog = FIOAnalog | (int)pow(2, ChannelN);
else if(ChannelN <= 15)
EIOAnalog = EIOAnalog | (int)pow(2, (ChannelN - 8));
//Using ConfigIO to get current FIOAnalog and EIOAnalog settings
if((error = ehConfigIO(Handle, 0, 0, 0, 0, 0, &curTCConfig, &outDAC1Enable, &curFIOAnalog, &curEIOAnalog)) != 0)
return error;
*DAC1Enable = outDAC1Enable;
if( !(FIOAnalog == curFIOAnalog && EIOAnalog == curEIOAnalog) )
{
//Creating new FIOAnalog and EIOAnalog settings
FIOAnalog = FIOAnalog | curFIOAnalog;
EIOAnalog = EIOAnalog | curEIOAnalog;
//Using ConfigIO to set new FIOAnalog and EIOAnalog settings
if((error = ehConfigIO(Handle, 12, curTCConfig, 0, FIOAnalog, EIOAnalog, NULL, NULL, &curFIOAnalog, &curEIOAnalog)) != 0)
return error;
}
}
/* Setting up Feedback command to read analog input */
sendDataBuff[0] = 1; //IOType is AIN
settling = (Settling != 0) ? 1 : 0;
quicksample = (Resolution != 0) ? 1 : 0;
sendDataBuff[1] = (uint8)ChannelP + settling*64 + quicksample*128; //Positive channel (bits 0-4), LongSettling (bit 6)
//QuickSample (bit 7)
sendDataBuff[2] = (uint8)ChannelN; //Negative channel
if(ehFeedback(Handle, sendDataBuff, 3, &Errorcode, &ErrorFrame, recDataBuff, 2) < 0)
return -1;
if(Errorcode)
return (long)Errorcode;
bytesVT = recDataBuff[0] + recDataBuff[1]*256;
if (isSpecialRange) {
ChannelN = 32; // Change the negative channel back to 32 from 30 for conversion.
}
if(Binary != 0)
{
*Voltage = (double)bytesVT;
}
else
{
if(ChannelP == 30)
{
if(getTempKCalibrated(CalibrationInfo, bytesVT, Voltage) < 0)
return -1;
}
else
{
if(hwver < 1.30)
error = getAinVoltCalibrated(CalibrationInfo, (int)(*DAC1Enable), ChannelN, bytesVT, Voltage);
else
error = getAinVoltCalibrated_hw130(CalibrationInfo, ChannelP, ChannelN, bytesVT, Voltage);
if(error < 0)
return -1;
}
}
return 0;
}
long getAinVoltUncalibrated(int dacEnabled, uint8 negChannel, uint16 bytesVolt, double *analogVolt)
{
U3_CALIBRATION_INFO_DEFAULT.hardwareVersion = 1.20;
U3_CALIBRATION_INFO_DEFAULT.highVoltage = 0;
return getAinVoltCalibrated(&U3_CALIBRATION_INFO_DEFAULT, dacEnabled, negChannel, bytesVolt, analogVolt);
}
long getAinVoltUncalibrated(uint8 gainBip, uint8 resolution, uint16 bytesVolt, double *analogVolt)
{
return getAinVoltCalibrated(&UE9_CALIBRATION_INFO_DEFAULT, gainBip, resolution, bytesVolt, analogVolt);
}
//Sends a Feedback low-level command to set DAC0, DAC1, read FIO0-FIO3 and
//AI0-AI3.
int feedback_example(HANDLE hDevice, ue9CalibrationInfo *caliInfo)
{
uint8 sendBuff[34], recBuff[64], ainResolution, gainBip;
uint16 checksumTotal, bytesVoltage;
uint32 tempDir, tempState;
int sendChars, recChars, i;
double voltage;
ainResolution = 12;
//ainResolution = 18; //high-res mode for UE9 Pro only
gainBip = 0; //(Gain = 1, Bipolar = 0)
sendBuff[1] = (uint8)(0xF8); //Command byte
sendBuff[2] = (uint8)(0x0E); //Number of data words
sendBuff[3] = (uint8)(0x00); //Extended command number
//All these bytes are set to zero since we are not changing the FIO, EIO, CIO
//and MIO directions and states
for( i = 6; i <= 15; i++ )
sendBuff[i] = (uint8)(0x00);
if( getDacBinVoltCalibrated(caliInfo, 0, 2.500, &bytesVoltage) < 0 )
return -1;
//setting the voltage of DAC0
sendBuff[16] = (uint8)( bytesVoltage & (0x00FF) ); //low bits of DAC0
sendBuff[17] = (uint8)( bytesVoltage / 256 ) + 192; //high bits of DAC0
//(bit 7 : Enable,
// bit 6: Update)
if( getDacBinVoltCalibrated(caliInfo, 1, 3.500, &bytesVoltage) < 0 )
return -1;
//setting the voltage of DAC1
sendBuff[18] = (uint8)( bytesVoltage & (0x00FF) ); //low bits of DAC1
sendBuff[19] = (uint8)( bytesVoltage / 256 ) + 192; //high bits of DAC1
//(bit 7 : Enable,
// bit 6: Update)
sendBuff[20] = (uint8)(0x0f); //AINMask - reading AIN0-AIN3, not AIN4-AIN7
sendBuff[21] = (uint8)(0x00); //AINMask - not reading AIN8-AIN15
sendBuff[22] = (uint8)(0x00); //AIN14ChannelNumber - not using
sendBuff[23] = (uint8)(0x00); //AIN15ChannelNumber - not using
sendBuff[24] = ainResolution; //Resolution = 12
//Setting BipGains
for( i = 25; i < 34; i++ )
sendBuff[i] = gainBip;
extendedChecksum(sendBuff, 34);
//Sending command to UE9
sendChars = LJUSB_Write(hDevice, sendBuff, 34);
if( sendChars < 34 )
{
if( sendChars == 0 )
printf("Error : write failed\n");
else
printf("Error : did not write all of the buffer\n");
return -1;
}
//Reading response from UE9
recChars = LJUSB_Read(hDevice, recBuff, 64);
if( recChars < 64 )
{
if( recChars == 0 )
printf("Error : read failed\n");
else
printf("Error : did not read all of the buffer\n");
return -1;
}
checksumTotal = extendedChecksum16(recBuff, 64);
if( (uint8)((checksumTotal / 256) & 0xff) != recBuff[5] )
{
printf("Error : read buffer has bad checksum16(MSB)\n");
return -1;
}
if( (uint8)(checksumTotal & 0xff) != recBuff[4])
{
printf("Error : read buffer has bad checksum16(LSB)\n");
return -1;
}
if( extendedChecksum8(recBuff) != recBuff[0] )
{
printf("Error : read buffer has bad checksum8\n");
return -1;
}
if( recBuff[1] != (uint8)(0xF8) || recBuff[2] != (uint8)(0x1D) || recBuff[3] != (uint8)(0x00) )
{
printf("Error : read buffer has wrong command bytes \n");
return -1;
}
printf("Set DAC0 to 2.500 volts and DAC1 to 3.500 volts.\n\n");
printf("Flexible digital I/O directions and states (FIO0 - FIO3):\n");
for( i = 0; i < 4; i++ )
{
tempDir = ( (uint32)(recBuff[6] / pow(2, i)) & (0x01) );
tempState = ( (uint32)(recBuff[7] / pow(2, i)) & (0x01) );
printf(" FI%d: %u and %u\n", i, tempDir, tempState);
}
printf("\nAnalog Inputs (AI0 - AI3):\n");
for( i = 0; i < 4; i++ )
{
bytesVoltage = recBuff[12 + 2*i] + recBuff[13 + 2*i]*256;
//getting analog voltage
if( getAinVoltCalibrated(caliInfo, gainBip, ainResolution, bytesVoltage, &voltage) < 0 )
return -1;
printf(" AI%d: %.4f V\n", i, voltage);
}
printf("\n");
return 0;
}
//Reads the StreamData low-level function response in a loop. All voltages from
//the stream are stored in the voltages 2D array.
int StreamData_example(HANDLE hDevice, ue9CalibrationInfo *caliInfo)
{
uint16 voltageBytes, checksumTotal;
int recChars, backLog, overflow;
int i, j, k, m, packetCounter, currChannel, scanNumber;
int totalPackets; //The total number of StreamData responses read
int numDisplay; //Number of times to display streaming information
int numReadsPerDisplay; //Number of packets to read before displaying streaming information
int readSizeMultiplier; //Multiplier for the StreamData receive buffer size
long startTime, endTime;
packetCounter = 0;
currChannel = 0;
scanNumber = 0;
totalPackets = 0;
recChars = 0;
numDisplay = 6;
numReadsPerDisplay = 3;
readSizeMultiplier = 10;
/* Each StreamData response contains (16/NumChannels) * readSizeMultiplier
* samples for each channel.
* Total number of scans = (16 / NumChannels) * 4 * readSizeMultiplier * numReadsPerDisplay * numDisplay
*/
double voltages[(16/NumChannels)*4*readSizeMultiplier*numReadsPerDisplay*numDisplay][NumChannels];
uint8 recBuff[192*readSizeMultiplier];
printf("Reading Samples...\n");
startTime = getTickCount();
for( i = 0; i < numDisplay; i++ )
{
for( j = 0; j < numReadsPerDisplay; j++ )
{
/* For USB StreamData, use Endpoint 2 for reads and 192 byte packets
* instead of the 46. The 192 byte response is 4 StreamData packet
* responses of 48 bytes.
* You can read the multiple StreamData responses of 192 bytes to help
* improve streaming performance. In this example this multiple is
* adjusted by the readSizeMultiplier variable.
*/
//Reading response from UE9
recChars = LJUSB_Stream(hDevice, recBuff, 192*readSizeMultiplier);
if( recChars < 192*readSizeMultiplier )
{
if( recChars == 0 )
printf("Error : read failed (StreamData).\n");
else
printf("Error : did not read all of the buffer %d (StreamData).\n", recChars);
return -1;
}
overflow = 0;
//Checking for errors and getting data out of each StreamData response
for( m = 0; m < 4*readSizeMultiplier; m++ )
{
totalPackets++;
checksumTotal = extendedChecksum16(recBuff + m*48, 46);
if( (uint8)((checksumTotal >> 8) & 0xff) != recBuff[m*48 + 5] )
{
printf("Error : read buffer has bad checksum16(MSB) (StreamData).\n");
return -1;
}
if( (uint8)(checksumTotal & 0xff) != recBuff[m*48 + 4] )
{
printf("Error : read buffer has bad checksum16(LSB) (StreamData).\n");
return -1;
}
checksumTotal = extendedChecksum8(recBuff + m*48);
if( checksumTotal != recBuff[m*48] )
{
printf("Error : read buffer has bad checksum8 (StreamData).\n");
return -1;
}
if( recBuff[m*48 + 1] != (uint8)(0xF9) || recBuff[m*48 + 2] != (uint8)(0x14) || recBuff[m*48 + 3] != (uint8)(0xC0) )
{
printf("Error : read buffer has wrong command bytes (StreamData).\n");
return -1;
}
if( recBuff[m*48 + 11] != 0 )
{
printf("Errorcode # %d from StreamData read.\n", (unsigned int)recBuff[11]);
return -1;
}
if( packetCounter != (int) recBuff[m*48 + 10] )
{
printf("PacketCounter does not match with with current packet count (StreamData).\n");
return -1;
}
backLog = recBuff[m*48 + 45]&0x7F;
//Checking MSB for Comm buffer overflow
if( (recBuff[m*48 + 45] & 128) == 128 )
{
printf("\nComm buffer overflow detected in packet %d\n", totalPackets);
printf("Current Comm backlog: %d\n", recBuff[m*48 + 45]&0x7F);
overflow = 1;
}
for( k = 12; k < 43; k += 2 )
{
voltageBytes = (uint16)recBuff[m*48 + k] + (uint16)recBuff[m*48 + k+1]*256;
getAinVoltCalibrated(caliInfo, (uint8)(0x00), ainResolution, voltageBytes, &(voltages[scanNumber][currChannel]));
currChannel++;
if( currChannel > 3 )
{
currChannel = 0;
scanNumber++;
}
}
if( packetCounter >= 255 )
packetCounter = 0;
else
packetCounter++;
//Handle Comm buffer overflow by stopping, flushing and restarting stream
if( overflow == 1 )
{
printf("\nRestarting stream...\n");
doFlush(hDevice);
if( StreamConfig_example(hDevice) != 0 )
{
printf("Error restarting StreamConfig.\n");
return -1;
}
if( StreamStart(hDevice) != 0 )
{
printf("Error restarting StreamStart.\n");
return -1;
}
packetCounter = 0;
break;
}
}
}
printf("\nNumber of scans: %d\n", scanNumber);
printf("Total packets read: %d\n", totalPackets);
printf("Current PacketCounter: %d\n", ((packetCounter == 0) ? 255 : packetCounter-1));
printf("Current Comm backlog: %d\n", backLog);
for( k = 0; k < 4; k++ )
printf(" AI%d: %.4f V\n", k, voltages[scanNumber - 1][k]);
}
endTime = getTickCount();
printf("\nRate of samples: %.0lf samples per second\n", (scanNumber*NumChannels)/((endTime - startTime)/1000.0));
printf("Rate of scans: %.0lf scans per second\n\n", scanNumber/((endTime - startTime)/1000.0));
return 0;
}
//Calls the Feedback low-level command numIterations times and calculates the
//time per iteration.
int allIO(HANDLE hDevice, u6CalibrationInfo *caliInfo)
{
uint8 *sendBuff, *recBuff;
uint16 checksumTotal, bits16;
uint32 bits32;
int sendChars, recChars, i, j, sendSize, recSize;
double valueAIN[14];
long time;
int ret = 0;
for( i = 0; i < 14; i++ )
valueAIN[i] = 9999;
//Setting up a Feedback command that will set CIO0-3 as input, and setting
//DAC0 voltage
sendBuff = (uint8 *)malloc(18*sizeof(uint8)); //Creating an array of size 18
recBuff = (uint8 *)malloc(10*sizeof(uint8)); //Creating an array of size 10
sendBuff[1] = (uint8)(0xF8); //Command byte
sendBuff[2] = 6; //Number of data words (.5 word for echo, 5.5
//words for IOTypes and data)
sendBuff[3] = (uint8)(0x00); //Extended command number
sendBuff[6] = 0; //Echo
sendBuff[7] = 29; //IOType is PortDirWrite
sendBuff[8] = 0; //FIO Writemask
sendBuff[9] = 0; //EIO Writemask
sendBuff[10] = 15; //CIO Writemask
sendBuff[11] = 0; //FIO Direction
sendBuff[12] = 0; //EIO Direction
sendBuff[13] = 0; //CIO Direction
//Setting DAC0 with 2.5 volt output
sendBuff[14] = 38; //IOType is DAC0(16-bit)
//Value is 2.5 volts (in binary)
getDacBinVoltCalibrated16Bit(caliInfo, 0, 2.5, &bits16);
sendBuff[15] = (uint8)(bits16&255);
sendBuff[16] = (uint8)(bits16/256);
sendBuff[17] = 0; //extra padding byte
extendedChecksum(sendBuff, 18);
//Sending command to U6
if( (sendChars = LJUSB_Write(hDevice, sendBuff, 18)) < 18 )
{
if(sendChars == 0)
printf("Feedback (CIO input) error : write failed\n");
else
printf("Feedback (CIO input) error : did not write all of the buffer\n");
ret = -1;
goto cleanmem;
}
//Reading response from U6
if( (recChars = LJUSB_Read(hDevice, recBuff, 10)) < 10 )
{
if( recChars == 0 )
{
printf("Feedback (CIO input) error : read failed\n");
ret = -1;
goto cleanmem;
}
else
printf("Feedback (CIO input) error : did not read all of the buffer\n");
}
checksumTotal = extendedChecksum16(recBuff, 10);
if( (uint8)((checksumTotal / 256) & 0xff) != recBuff[5] )
{
printf("Feedback (CIO input) error : read buffer has bad checksum16(MSB)\n");
ret = -1;
goto cleanmem;
}
if( (uint8)(checksumTotal & 0xff) != recBuff[4] )
{
printf("Feedback (CIO input) error : read buffer has bad checksum16(LBS)\n");
ret = -1;
goto cleanmem;
}
if( extendedChecksum8(recBuff) != recBuff[0] )
{
printf("Feedback (CIO input) error : read buffer has bad checksum8\n");
ret = -1;
goto cleanmem;
}
if( recBuff[1] != (uint8)(0xF8) || recBuff[3] != (uint8)(0x00) )
{
printf("Feedback (CIO input) error : read buffer has wrong command bytes \n");
ret = -1;
goto cleanmem;
}
if( recBuff[6] != 0 )
{
printf("Feedback (CIO input) error : received errorcode %d for frame %d in Feedback response. \n", recBuff[6], recBuff[7]);
ret = -1;
goto cleanmem;
}
free(sendBuff);
free(recBuff);
//Setting up Feedback command that will run numIterations times
if( ((sendSize = 7+numChannels*4) % 2) != 0 )
sendSize++; //Need an extra byte
sendBuff = (uint8 *)malloc(sendSize*sizeof(uint8)); //Creating an array of size sendSize
if( ((recSize = 9+numChannels*3) % 2) != 0 )
recSize++; //Need an extra byte
recBuff = (uint8 *)malloc(recSize*sizeof(uint8)); //Creating an array of size recSize
sendBuff[1] = (uint8)(0xF8); //Command byte
sendBuff[2] = (sendSize - 6)/2; //Number of data words
sendBuff[3] = (uint8)(0x00); //Extended command number
sendBuff[6] = 0; //Echo
sendBuff[sendSize - 1] = 0; //Setting last byte to zero in case it is the extra padding byte
//Setting AIN read commands
for( j = 0; j < numChannels; j++ )
{
sendBuff[7 + j*4] = 2; //IOType is AIN24
//Positive Channel (bits 0 - 4), LongSettling (bit 6) and QuickSample (bit 7)
sendBuff[8 + j*4] = j; //Positive Channel
sendBuff[9 + j*4] = (uint8)(resolution&15) + (uint8)((gainIndex&15)*16); //ResolutionIndex (Bits 0-3), GainIndex (Bits 4-7)
sendBuff[10 + j*4] = (uint8)(settlingFactor&7); //SettlingFactor (Bits 0-2)
if( j%2 == 0 )
sendBuff[10 + j*4] += (uint8)((differential&1)*128); //Differential (Bits 7)
}
extendedChecksum(sendBuff, sendSize);
time = getTickCount();
for( i = 0; i < numIterations; i++ )
{
//Sending command to U6
if( (sendChars = LJUSB_Write(hDevice, sendBuff, sendSize)) < sendSize )
{
if(sendChars == 0)
printf("Feedback error (Iteration %d): write failed\n", i);
else
printf("Feedback error (Iteration %d): did not write all of the buffer\n", i);
ret = -1;
goto cleanmem;
}
//Reading response from U6
if( (recChars = LJUSB_Read(hDevice, recBuff, recSize)) < recSize )
{
if( recChars == 0 )
{
printf("Feedback error (Iteration %d): read failed\n", i);
ret = -1;
goto cleanmem;
}
}
checksumTotal = extendedChecksum16(recBuff, recChars);
if( (uint8)((checksumTotal / 256) & 0xff) != recBuff[5] )
{
printf("Feedback error (Iteration %d): read buffer has bad checksum16(MSB)\n", i);
ret = -1;
goto cleanmem;
}
if( (uint8)(checksumTotal & 0xff) != recBuff[4] )
{
printf("Feedback error (Iteration %d): read buffer has bad checksum16(LBS)\n", i);
ret = -1;
goto cleanmem;
}
if( extendedChecksum8(recBuff) != recBuff[0] )
{
printf("Feedback error (Iteration %d): read buffer has bad checksum8\n", i);
ret = -1;
goto cleanmem;
}
if( recBuff[1] != (uint8)(0xF8) || recBuff[3] != (uint8)(0x00) )
{
printf("Feedback error (Iteration %d): read buffer has wrong command bytes \n", i);
ret = -1;
goto cleanmem;
}
if( recBuff[6] != 0 )
{
printf("Feedback error (Iteration %d): received errorcode %d for frame %d in Feedback response. \n", i, recBuff[6], recBuff[7]);
ret = -1;
goto cleanmem;
}
if( recChars != recSize )
{
printf("Feedback error (Iteration %d): received packet if %d size when expecting %d\n", i, recChars, recSize);
ret = -1;
goto cleanmem;
}
//Getting AIN voltages
for(j = 0; j < numChannels; j++)
{
bits32 = recBuff[9+j*3] + recBuff[10+j*3]*256 + recBuff[11+j*3]*65536;
getAinVoltCalibrated(caliInfo, resolution, gainIndex, 1, bits32, &valueAIN[j]);
}
}
time = getTickCount() - time;
printf("Milliseconds per iteration = %.3f\n", (double)time / (double)numIterations);
printf("\nAIN readings from last iteration:\n");
for( j = 0; j < numChannels; j++ )
printf("%.3f\n", valueAIN[j]);
cleanmem:
free(sendBuff);
free(recBuff);
sendBuff = NULL;
recBuff = NULL;
return ret;
}