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4.5 Software
This section provides the libraries, function calls, and sample programs related to the D/A
Converter Card.
4.5.1 Dynamic C Libraries
In addition to the library associated with the master single-board computer such as the
BL2500 or OP7200, one other library is needed to provide function calls for the D/A
Converter Card.
? RNET_AOUT.LIB —provides functions unique to the analog outputs on the D/A Con-
verter Card. Function calls for this library are discussed in this chapter.
Functions relevant to RabbitNet peripheral cards in general are described in Section 1.3.4.
Other functions applicable to all devices based on Rabbit microprocessors are described in
the Dynamic C Function Reference User ’s Manual .
4.5.2 Sample Programs
Sample programs are provided in the Dynamic C SAMPLES folder.
The various folders contain specific sample programs that illustrate the use of the corre-
sponding Dynamic C libraries. For example, the sample program PONG.C demonstrates
the output to the STDIO window.
To run a sample program, open it with the File menu (if it is not still open), then compile
and run it by pressing F9 or by selecting Run in the Run menu. The RabbitNet peripheral
card must be connected to a master such as the BL2500 with its Demonstration Board con-
nected as explained in the Coyote (BL2500) User ’s Manual or other user ’s manual. The
BL2500 or other master must be in Program Mode, and must be connected via the pro-
gramming cable to a PC.
The SAMPLES\RABBITNET\RN1300 subdirectory contains the following sample pro-
grams. When running these sample programs, the D/A Converter Card may be connected to
either RabbitNet port on a master such as the BL2500 that has two RabbitNet ports. The
sample program will use rn_find() and the product RN1300 as the search criteria to
first find any D/A Converter Cards connected to the master. The first D/A Converter Card
found will run the sample program.
? DAC_ASYNC.C —This sample program outputs a voltage that can be read with a voltme-
ter. The output voltage is calculated using the calibration constants located on the D/A
Converter Card EEPROM (simulated in flash memory).
The D/A Converter Card is set up for the asynchronous mode of operation, which updates a
D/A converter output at the time it is being accessed via the anaOutVolts() or
anaOut() functions. (i.e., the anaOutStrobe() function is not used to update the D/A
converter outputs).
The sample program DAC_SYNC.C illustrates the synchronous mode of operation.
Before you run this sample program, make sure that the DCIN for the D/A Converter Card
is at least 3 V more than the maximum voltage of the D/A converter output voltage range you
90
RabbitNet Peripheral Cards
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