Repeating Triggering 6402c

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PS4000A_ID_Block_Example.m

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set(triggerGroupObj, 'autoTriggerMs', 0);
set(triggerGroupObj, 'delay', 0);
% Channel     : 0 (ps4000aEnuminfo.enPS4000AChannel.PS4000A_CHANNEL_A)
% Threshold   : 1700 (mV)
% Direction   : 2 (ps4000aEnuminfo.enPS4000AThresholdDirection.PS4000A_RISING)
[status.setSimpleTrigger] = invoke(triggerGroupObj, 'setSimpleTrigger', 0, 1700, 2);


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Copyright (C) Pico Technology Ltd. 2014 - 2015

PicoScope 4000 Series (A API) MATLAB Instrument Driver

Number of units found: 1

Serial number(s): CS570/011

Opening PicoScope 4000 Series device...

   Instrument Device Object Using Driver : picotech_ps4000a_generic.mdd

   Instrument Information
      Type:               Oscilloscope
      Manufacturer:       Pico Technology Ltd.
      Model:              PicoScope 4000 Series (A API)

   Driver Information
      DriverType:         MATLAB generic
      DriverName:         picotech_ps4000a_generic.mdd
      DriverVersion:      1.1.26

   Communication State
      Status:             open

Setting Device Parameters...

Default Channel Setup:-
-----------------------

Channel A:-
   Enabled: True
   Coupling: DC
   Range: 5V
   Analogue Offset: 0.0V

Channel B:-
   Enabled: True
   Coupling: DC
   Range: 5V
   Analogue Offset: 0.0V

Turning off trigger...

Default Block mode parameters:-

               Timebase index : 79
                 Time Interval: 1540.0 ns
Number of pre-trigger samples: 0
Number of post-trigger samples: 1000000
       Total number of samples: 1000000

Default Streaming mode parameters:-

Streaming interval: 1.00e-06 s
Streaming auto stop: 1


Initialisation complete.

Connected to PicoScope 4000 Series device:-

      Instrument Model: 4225
   Batch/Serial Number: CS570/0119
     Analogue Channels: 2
             Bandwidth: 20 MHz
         Buffer memory: 250 MS
Maximum sampling rate: 400 MS/s
Signal Generator Type: None

runBlock:- Collecting block of data:
   Timebase: 79
   Pre-trigger samples: 0
   Post-trigger samples: 1000000
runBlock: Waiting for device to become ready...
runBlock: Device ready.

getBlockData: Setting up data buffers...
getBlockData: Retrieving data...
getBlockData: Assigning data to array and converting to millivolts.
getBlockData: Data succesfully retrieved.
Connection to PicoScope 4225 with serial number CS570/0119 closed successfully.
Libraries unloaded successfully.


MoJou wrote:

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Turning off trigger...


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connect(ps4000aDeviceObj);

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Default Channel Setup:-
-----------------------
(...)
Turning off trigger...


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triggerGroupObj = get(ps4000aDeviceObj, 'Trigger');
triggerGroupObj = triggerGroupObj(1);

set(triggerGroupObj, 'autoTriggerMs', 0);

[status.setSimpleTrigger] = invoke(triggerGroupObj, 'setSimpleTrigger', 0, thresholdvalue, 2);


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%% PicoScope 4000 Series (A API) Instrument Driver Oscilloscope Block Data Capture Example
% This is an example of an instrument control session using a device
% object. The instrument control session comprises all the steps you
% are likely to take when communicating with your instrument.
%       
% These steps are:
%   
% # Create a device object   
% # Connect to the instrument
% # Configure properties
% # Invoke functions
% # Disconnect from the instrument
%
% To run the instrument control session, type the name of the file,
% PS4000A_ID_Block_Example, at the MATLAB command prompt.
%
% The file, PS4000A_ID_BLOCK_EXAMPLE.M must be on your MATLAB PATH. For
% additional information on setting your MATLAB PATH, type 'help addpath'
% at the MATLAB command prompt.
%
% *Example:*
%     PS4000A_ID_Block_Example;
%
% *Description:*
%     Demonstrates how to call functions in order to capture a block of
%     data from a PicoScope 4000 Series Oscilloscope using the underlying
%     'A' API.
%
% *See also:* <matlab:doc('icdevice') icdevice> | <matlab:doc('instrument/invoke') invoke>
%
% *Copyright:* (C) Pico Technology Limited 2014 - 2015. All rights reserved.

%% Suggested Input Test Signal
% This example was published using the following test signal:
%
% * Channel A: 4Vpp, 5Hz sine wave

%% Clear Command Window

clc;

%% Load Configuration Information

PS4000aConfig;

%% Device Connection

% Create a device object.
% The serial number can be specified as a second input parameter.
ps4000aDeviceObj = icdevice('picotech_ps4000a_generic.mdd', '');

% Connect device object to hardware.
connect(ps4000aDeviceObj);

%% Set Channels

% Default driver settings applied to channels are listed below -
% use ps4000aSetChannel to turn channels on or off and set voltage ranges,
% coupling, as well as analogue offset.

% In this example, data is only collected on Channel A so default settings
% are used and channels B to H are switched off.

% Channels       : 1 - 7 (ps4000aEnuminfo.enPS4000AChannel.PS4000A_CHANNEL_B - PS4000A_CHANNEL_H)
% Enabled        : 0
% Type           : 1 (ps4000aEnuminfo.enPS4000ACoupling.PS4000A_DC)
% Range          : 8 (ps4000aEnuminfo.enPS4000ARange.PS4000A_5V)
% Analogue Offset: 0.0

% Execute device object function(s).
[status.setChB] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 1, 0, 0, 4, 0.0);

if(ps4000aDeviceObj.channelCount == PicoConstants.QUAD_SCOPE || ps4000aDeviceObj.channelCount == PicoConstants.OCTO_SCOPE)

    [status.setChC] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 2, 0, 1, 8, 0.0);
    [status.setChD] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 3, 0, 1, 8, 0.0);

end

if(ps4000aDeviceObj.channelCount == PicoConstants.OCTO_SCOPE)

    [status.setChE] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 4, 0, 1, 8, 0.0);
    [status.setChF] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 5, 0, 1, 8, 0.0);
    [status.setChG] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 6, 0, 1, 8, 0.0);
    [status.setChH] = invoke(ps4000aDeviceObj, 'ps4000aSetChannel', 7, 0, 1, 8, 0.0);

end

%% Verify Timebase Index and Maximum Number of Samples
% Driver default timebase index used - use ps4000aGetTimebase2 to query the
% driver as to suitability of using a particular timebase index and the
% maximum number of samples available in the segment selected (the buffer
% memory has not been segmented in this example) then set the 'timebase'
% property if required.
%
% To use the fastest sampling interval possible, set one analogue channel
% and turn off all other channels.
%
% Use a while loop to query the function until the status indicates that a
% valid timebase index has been selected. In this example, the timebase
% index of 79 is valid.

% Initial call to ps4000aGetTimebase2 with parameters:
% timebase      : 79
% segment index : 0

status.getTimebase2 = PicoStatus.PICO_INVALID_TIMEBASE;
timebaseIndex = get(ps4000aDeviceObj, 'timebase');

while(status.getTimebase2 == PicoStatus.PICO_INVALID_TIMEBASE)

    [status.getTimebase2, timeIntervalNanoSeconds, maxSamples] = invoke(ps4000aDeviceObj, 'ps4000aGetTimebase2', timebaseIndex, 0);
   
    if(status.getTimebase2 == PicoStatus.PICO_OK)
       
        break;
       
    else
       
        timebaseIndex = timebaseIndex + 1;
       
    end

end

set(ps4000aDeviceObj, 'timebase', timebaseIndex);

%% Set Simple Trigger
% Set a trigger on Channel A, with an auto timeout - the default value for
% delay is used.

% Trigger properties and functions are located in the Instrument
% Driver's Trigger group.

triggerGroupObj = get(ps4000aDeviceObj, 'Trigger');
triggerGroupObj = triggerGroupObj(1);

% Set the autoTriggerMs property in order to automatically trigger the
% oscilloscope after 1 second if a trigger event has not occurred. Set to 0
% to wait indefinitely for a trigger event.

set(triggerGroupObj, 'autoTriggerMs', 0);
set(triggerGroupObj, 'delay', 0);
% Channel     : 0 (ps4000aEnuminfo.enPS4000AChannel.PS4000A_CHANNEL_A)
% Threshold   : 500 (mV)
% Direction   : 2 (ps4000aEnuminfo.enPS4000AThresholdDirection.PS4000A_RISING)

[status.setSimpleTrigger] = invoke(triggerGroupObj, 'setSimpleTrigger', 0, 500, 2);

%% Set Block Parameters and Capture Data
% Capture a block of data and retrieve data values for Channel A.

% Block data acquisition properties and functions are located in the
% Instrument Driver's Block group.

blockGroupObj = get(ps4000aDeviceObj, 'Block');
blockGroupObj = blockGroupObj(1);

% Set pre-trigger and post-trigger samples as required
% The default of 0 pre-trigger and 1 million post-trigger samples is used
% in this example.

% set(ps4000aDeviceObj, 'numPreTriggerSamples', 0);
% set(ps4000aDeviceObj, 'numPostTriggerSamples', 2e6);

%%
% This example uses the _runBlock_ function in order to collect a block of
% data - if other code needs to be executed while waiting for the device to
% indicate that it is ready, use the _ps4000aRunBlock_ function and poll
% the _ps4000aIsReady_ function.

% Capture a block of data:
%
% segment index: 0 (The buffer memory is not segmented in this example)

[status.runBlock] = invoke(blockGroupObj, 'runBlock', 0);

% Retrieve data values:
%
% start index       : 0
% segment index     : 0
% downsampling ratio: 1
% downsampling mode : 0 (ps4000aEnuminfo.enPS4000ARatioMode.PS4000A_RATIO_MODE_NONE)

% Provide additional output arguments for the remaining channels e.g. chB
% for Channel B
[numSamples, overflow, chA] = invoke(blockGroupObj, 'getBlockData', 0, 0, 1, 0);

% Stop the device
[status.stop] = invoke(ps4000aDeviceObj, 'ps4000aStop');

%% Process Data
% Plot data values returned from the device.

figure1 = figure('Name','PicoScope 4000 Series Example - Block Mode Capture', ...
    'NumberTitle', 'off');

% Calculate sampling interval (nanoseconds) and convert to milliseconds
% Use the timeIntervalNanoSeconds output from the ps4000aGetTimebase2
% function or calculate it using the main Programmer's Guide.

timeNs = double(timeIntervalNanoSeconds) * double(0:numSamples - 1);
timeMs = timeNs / 1e6;

% Channel A
plot(timeMs, chA);

title('Block Data Acquisition');
xlabel('Time (ms)');
ylabel('Voltage (mV)');

grid on;
legend('Channel A');

%% Disconnect Device
% Disconnect device object from hardware.
disconnect(ps4000aDeviceObj);
delete(ps4000aDeviceObj);