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How to set the GPIF clock frequency (by default running @ 200Mhz)?
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How to set the GPIF clock frequency (by default running @ 200Mhz)?

dtromp_nl posted on 30 Mar 2012 9:05 AM PST
Senior Member
11 Forum Posts

Using the GPIF designer, I configured the GPIF interface as master with internal clock.
It appears that the statemachine runs @ 200Mhz, and that the clock provided by the FX3 to the outside world is also 200Mhz.

I tried using CyU3PDeviceInit but that doesn't change the GPIF frequency

I tried changing the CY_U3P_GPIF_CONF_DDR_MODE field in the GPIF Configuration Register by manually changing the generated cyfxgpif2config.h file, but that doesn't help either..

In both cases the external clock remains 200.8Mhz ...
 

Q: Has anyone ideas how to change this to 100Mhz?

(since that is the maximum frequency the interface supports...)

Re: How to set the GPIF clock frequency (by default running @ 200Mhz)?

sodafarl posted on 30 Mar 2012 11:12 AM PST
Top Contributor
128 Forum Posts

I haven't used this but maybe another function to try is CyU3PPibInit(). See slavefifo example for some details about it.

Sodafarl

Re: How to set the GPIF clock frequency (by default running @ 200Mhz)?

dtromp_nl posted on 02 Apr 2012 01:46 AM PST
Senior Member
11 Forum Posts

That seems to work, thanks!

 

 

 



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