Products > FMC110

DAC (1) issue in FMC110

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kanzabaig:
With reference to the thread : http://www.4dsp.com/forum/index.php?topic=3425.0
I am facing the similar kind of an issue. DAC0 is working perfectly fine but DAC1 shows erratic behaviour. The reconfiguration sometimes resolve the issue but mostly it does not.
Kindly suggest some changes in the configuration file or something else to resolve the issue.
The image taken from the oscilloscope is provided below,
 

lmunoz:
Hi,

What carrier board are you using?  Are you running the reference software and firmware provided by 4DSP without any modifications and internal clock?  I will try to replicate the problem here.

The forum post you linked to looks like an issue with the ADC because he is talking about the delays/calibration of each bit which is done on the ADC not the DAC. 

You are connecting the DAC directly to oscilloscope when you see the problem, is that correct?



-Luis

arnaudNL:
Dear Sir,


Can you please update us?


Best Regards,
Arnaud

kanzabaig:
I made some changes in the FMC110 core. I was trying to check its configuration registers, so i probed them out and added a reset pin. Before that it was working perfectly fine. I tried running the default program with default fmc110 core and it works well. I believe when you disturb the core the output of DAC is disturbed

kanzabaig:
My issue is that I want to check weither the core is configured or not, if its configured then I will start writing data onto the DAC port. How can I achieve it without disturbing the output of the core??

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