Connection with PicoScope5000 c code

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steiemi
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Joined: Wed Apr 18, 2018 6:34 am

Connection with PicoScope5000 c code

Post by steiemi » Mon Jun 11, 2018 8:40 am

Hello support,

I have a problem connecting my PicoScope 5444B to Matlab (C / API).
However, the connection with PicoScope6 and the normal Matlab library does not work with the Matlab c code.

Here is my code:

Code: Select all

setenv('MW_MINGW64_LOC','C:\TDM-GCC-64')
mex -setup C++

clc;
clear all;
close all;

loadlibrary 'ps5000a.dll' 'ps5000aApi.h' addheader 'picoStatus.h' mfilename 'PS5000aMFile';
if ~libisloaded('ps5000a')
error('library ps5000a.dll or ps5000a.h not found') %check if the library is loaded
end

% loadlibrary('ps5000aWrap.dll', 'ps5000aWrapMFile');

pBufferChASize = 1000000;
pBufferChA = libpointer('int16Ptr', zeros(pBufferChASize, 1));
[methodinfo,structs,enuminfo] = PS5000aMFile; % Data and method structure for the ps5000a api.

unithandle = 0; % Handle to the opened unit.
offsetVoltage = 0; % Offset in microvolt (±1 V).
pkToPk = 500000; % Peak-to-peak amplitude in microvolt (±250 mV to ±2 V).
waveType = enuminfo.enPS5000AWaveType.PS5000A_SINE; % Type of Wave. See commentsection at the bottom of this file for a full list.
%waveType = 'PS5000A_SINE'; % Type of Wave. See commentsection at the bottom of this file for a full list.
startFrequency = 1000; % Hz (must be lower than or equal to stopfrequency).
stopFrequency = 1000; % Hz.
increment = 0; % Increment in frequency for sweepmode.
dwellTime = 0; % Time (sec) spent in each frequency for sweepmode.
sweepType = enuminfo.enPS5000ASweepType.PS5000A_UP; % Type of sweep. See commentsection at the bottom of this file for a full list.
operation = enuminfo.enPS5000AExtraOperations.PS5000A_ES_OFF; % TRUE or FALSE.
shots = 0; % Number of shots if not in sweepmode.
sweeps = 0; % Number of sweeps if in sweepmode.
triggerType = enuminfo.enPS5000ASigGenTrigType.PS5000A_SIGGEN_RISING; % Trigger type. See commentsection at the bottom of this file for a full list.
triggerSource = enuminfo.enPS5000ASigGenTrigSource.PS5000A_SIGGEN_NONE; % Trigger source. See commentsection at the bottom of this file for a full list.
extInThreshold = 0; % Threshold for trigger on external in.

resolution = enuminfo.enPS5000ADeviceResolution.PS5000A_DR_8BIT;

noOfPreTriggerSamples = 0;
noOfPostTriggerSamples = 10;
noOfSamples = noOfPreTriggerSamples + noOfPostTriggerSamples;
maxSamples = noOfSamples;
timebase = 25;
oversample = 1;
timeIndisposedMs = [];
segmentIndex = 0; % Leave set to 0 unless the data is being captured in a specific segment on the device.
lpReady = []; % Callback not used
pParameter = [];
overflow = [];
channelA = enuminfo.enPS5000AChannel.PS5000A_CHANNEL_A;
range = enuminfo.enPS5000ARange.PS5000A_500MV;
downSampleRatio = 0; % If downSampleRatioMode = RATIO_MODE_NONE then this value is ignored
downSampleRatioMode = enuminfo.enPS5000ARatioMode.PS5000A_RATIO_MODE_NONE;
true = enuminfo.enPS5000ATriggerState.PS5000A_CONDITION_TRUE;

pico_status = 0;


[status_open,unithandle] = calllib('ps5000a','ps5000aOpenUnit',unithandle,0,resolution);
status_open = dec2hex(status_open);

status_ps5000aFlashLed = dec2hex(calllib('ps5000a','ps5000aFlashLed',unithandle, -1));

status_ps5000aPingUnit = dec2hex(calllib('ps5000a','ps5000aPingUnit',unithandle));

status_ps5000aSetChannel = dec2hex(calllib('ps5000a','ps5000aSetChannel',unithandle,channelA,true,true,range,offsetVoltage));

status_ps5000aGetTimebase = dec2hex(calllib('ps5000a','ps5000aGetTimebase',unithandle,timebase,noOfSamples,0,maxSamples,segmentIndex));

status_SetSigGenBuiltIn = dec2hex(calllib('ps5000a','ps5000aSetSigGenBuiltIn',unithandle,...
    offsetVoltage,pkToPk,waveType,startFrequency,stopFrequency,increment,dwellTime,...
    sweepType,operation,shots,sweeps,triggerType,triggerSource,extInThreshold));

status_ps5000aRunBlock = dec2hex(calllib('ps5000a','ps5000aRunBlock',unithandle, noOfPreTriggerSamples,...
    noOfPostTriggerSamples, timebase, timeIndisposedMs, segmentIndex, lpReady, pParameter));

ready = 0;
% Poll the driver until it has captured some data
while(ready == 0)
[status_read, ready] = calllib('ps5000a', 'ps5000aIsReady', unithandle, ready);
status_read = dec2hex(status_read);
pause(0.1);
end

% %pause(1);
% stillColectingData = 0;
% while(stillColectingData == 0)
%     status_IsReady = calllib('ps5000a','ps5000aIsReady',unithandle,&stillColectingData);
% end

status_ps5000aSetDataBuffer = dec2hex(calllib('ps5000a','ps5000aSetDataBuffer',unithandle,...
    channelA,pBufferChA,pBufferChASize,segmentIndex,downSampleRatioMode));

status_ps5000aGetValues = dec2hex(calllib('ps5000a','ps5000aGetValues',unithandle,...
    0,noOfSamples,downSampleRatio, downSampleRatioMode,segmentIndex,overflow));
    
% status_ps5000aBlockReady = calllib('ps5000a','ps5000aBlockReady',unithandle,pico_status,pParameter);

bufferChA = get(pBufferChA, 'Value');


unloadlibrary('ps5000a');
I did not get any errors! The only problem is that the status of the connection with ps5000aOpenUnit is 03 PICO_NOT_FOUND.

I know that PicoScope6 must not be opened and that no other connection with the PicoScope5444B should run!

Can someone help me with this problem?

Many thanks!
Mirco Steiert

Hitesh
PICO STAFF
PICO STAFF
Posts: 2855
Joined: Tue May 31, 2011 3:43 pm
Location: St. Neots, Cambridgeshire

Re: Connection with PicoScope5000 c code

Post by Hitesh » Tue Jun 12, 2018 9:24 am

Hi Mirco,

It looks as though by passing '0' for the serial number, the driver is unable to find a device with that serial number.

To ignore the serial number use the null matrix, i.e. []:

Code: Select all

[status_open,unithandle] = calllib('ps5000a','ps5000aOpenUnit',unithandle,[],resolution);
Just so you are aware, you can use the supporting files from the Instrument Driver package and don't need to use mex -setup as we already provide the prototype and thunk files.

When loading the libraries, you can call:

Code: Select all

loadlibrary('ps5000a.dll', @ps5000aMFile);
loadlibrary('ps5000aWrap.dll', @ps5000aWrapMFile);
Regards,
Hitesh

Software Dev. Engineer

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