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A-D & D-A port example By Lee Davison
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Typical display on the 'scope Introduction.

In this example the SuprDupr is used as an analog multiplexer to display eight analog inputs as a 'bargraph' type display on a 'scope.

The SuprDupr also generates a trigger pulse to synchronise the 'scope on the second analog output.

The upper trace is the multiplex out, the lower trace is the trigger pulse.


The code. 

10 REM 8 channel analog multiplex
20 REM displays 8 analog inputs as
30 REM a 'bargraph' type display on
40 REM a two channel 'scope.
50 REM
60 REM Analog out 1 is the trigger signal
70 REM Analog out 2 is the multiplex
80 REM
100 DO             : REM start of main loop
110  D2A1 255      : REM trigger pulse high
120  D2A1 0        : REM trigger pulse low
130  FOR ch=0 TO 7 : REM for each channel
140   D2A2 A2D(ch) : REM read port & out to scope
150  NEXT ch
160  D2A2 0        : REM set bar output level
170 LOOP
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Last page update: 4th June, 2003.