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DIGITIZING WAVEFORMS
PROGRAMMING > PROGRAMMING TECHNIQUES >
The subroutines shown below are used to simultaneously digitize any number of instruNet channels.
ResetChannelList()
AddToChannelList()
Set_iNet_TIMING_Parameters()
Set_iNet_TRIGGER_Parameters()
DigitizeListOfChannels()
GetDigitizedSegment()
PutEnabledChInDigitizeList()
Stop_iNet_Digitizing()
ThisIsAlreadyInChannelList() |
Reset the list of channels to digitize
Add channel to list of channels to digitize
Set digitize timing parameters
Set digitize trigger parameters
Tell instruNet to begin digitizing
Get a little segment of digitized data
Place enabled channels in digitize list
Tell instruNet to stop digitizing
Returns true if ch is already in list
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These routines are exposed through the iNet32.DLL and through the INET_INT.C
interface file; and are documented in file INET_INT.C. An example use of these
functions in C is shown in file INET_EX3.C. The following C code, from file
INET_EX3.C, demonstrates how to digitize one 100 point scan of 3 channels at
100samples/sec/channel in oscilloscope mode. For an example of C code that
processes a continuous stream, please see INET_EX3.C.
| numScansToDigitize = 1; |
# of scans to digitize
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| sampleRate = 100.0; |
sample rate |
| doStripChartMode = FALSE; |
do strip chart mode |
| e = ResetChannelList(); |
clear the list of channels to digitize |
| numCh = 0; |
start out with no channels in the list |
| e = AddToChannelList(1,1,1,1, &digiBuffer[ numCh++ ][ 0 ], BUFF_PTS * sizeof(iNetFLT32)); |
Add 'Ch1 Vin' to list, at address {1,1,1,1} |
| e = AddToChannelList(1,1,1,4, &digiBuffer[ numCh++ ][ 0 ], BUFF_PTS * sizeof(iNetFLT32)); |
Add 'Ch4 Vin' to list, at address {1,1,1,4} |
| e = AddToChannelList(1,1,1,7, &digiBuffer[ numCh++ ][ 0 ], BUFF_PTS * sizeof(iNetFLT32)); |
Add 'Ch7 Vin' to list, at address {1,1,1,7} |
| e = Set_iNet_TIMING_Parameters( |
set the timing options |
(iNetFLT32) sampleRate,
BUFF_PTS,
numScansToDigitize,
doStripChartMode,
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sample rate (pts/sec/ch)
number of pts in 1 scan, for 1 channel
number of scans that are digitized
if TRUE (1) we do Strip Chart Recorder work with Continuous Scans, otherwise if FALSE (0) we do Oscilloscope mode (non-Coninuous Scans) |
ion_gSaveDataPopup_ToRamBuffer
TRUE,
TRUE);
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Save digitize data in ram buffer
show alert on buffer overflow
accurate channel switching |
| Stop_iNet_Digitizing(); |
Make sure we are NOT digitizing, prepare to digitize the channels in the channel list and return
when 1 scan has been digitized.
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e = DigitizeListOfChannels(
TRUE /* allowMouseDownToStopDigitize */,
TRUE /* processOneScanAtATime */,
&last_scanNum_base1_pulled_inFull_oneCtlr); |
digitize the channels in the channel list and return when 1 scan has been digitized. |
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