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Submitted by Andrwe Buckin on Tue, 05/17/2016 - 21:07
Hi,
I am a new Vissim user and I would like to ask about the example for F28377S LaunchPad.
You have the example of the DAC?
Thank you!
Andrew.
Attached below you will find a diagram to put out a 10 Hz sin on the buffered DAC for the F28377S. Pete
Unable to find an attachment - read this blog
Thank you, working.
Why in your example, the signal looks so?
<?xml version="1.0" encoding="UTF-8"?>
Good question. Since the DACs take a 12 bit value, and we are using scaled fixed point representation of fx4.16, The full range of the DAC output is realized by providing values between 0 and 0.99975 (due to the 2's complement arithetic representation). Since we did not adjust the gain of the sin in the example, when it went to 1 it overflowed the DAC register and effectively went to zero.
Submitted by Andrwe Buckin on Wed, 05/18/2016 - 12:38.
Thank you.
Your example as mine does not produce the output A0 nothing.
?????
Submitted by Andrwe Buckin on Wed, 05/18/2016 - 12:53.
Thank you,
understood it was necessary to change the VDAC.
Submitted by Andrwe Buckin on Wed, 05/18/2016 - 15:50.
What's my error? I set Ramp16 to 10KHz and get on output DAC 8.09KHz. System Properties frequency set to 1MHz.
Submitted by pete on Wed, 05/18/2016 - 20:07.
On some of the 28377D parts, the internal oscillator can be slow. Try right clicking on the F28x Config block and changing to the on-board external crystal, and set the multiplier to 10 (the crystal is 20MHz)
is it possible to get this DAC code file? it says not found when i try to download.
Thanks in advance
Not sure why the attachments disappeared. Try this one.
