3 Replies Latest reply on Nov 27, 2018 9:56 PM by ThrimurthiM

8 Bit GPIF Interface wavefrom

ThrimurthiM Nov 23, 2018 1:56 AM

Hai all,

I am working on cypress FX3 cypress. I created "cyfxgpif2config" file by using GPIF designer tool and I saw the timing diagram in GPIF designer tool it showing waveform I attached this in below.

In this wave from Data is write when WR signal is low. But we made WR Pin as Active high signal in GPIF designer tool. According to my knowledge the data should write when WR signal is High. which one is true ( WR=1 or WR=0). please do the needful.

In my muster device will write a data when WR signal is high but I got Output as all zeros value. I attached image.

Thank you

Beast Regards,

Thrimurthi M

wave form.PNG 92.3 K

1. Re: 8 Bit GPIF Interface wavefrom

ThrimurthiM Nov 23, 2018 1:57 AM (in response to ThrimurthiM)

Master*
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2. Re: 8 Bit GPIF Interface wavefrom

AbhinavG_21 Nov 26, 2018 4:46 AM (in response to ThrimurthiM)

Hi Thrimurthi,

In slave fifo example SLWR, SLRD pins are input so it doesn't make much difference whether you select it as Active High or Active Low. To reverse the functionality you have to make changes in the state transaction equations in state machine diagram.
Please note that to see the real waveform you have to probe the physical lines, don't rely on the timing diagrams shown by GPIF designer tool.

Thanks & Regards
Abhinav
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3. Re: 8 Bit GPIF Interface wavefrom

ThrimurthiM Nov 27, 2018 9:56 PM (in response to ThrimurthiM)

Thank Abhinav sir. Now I able to write the data to cypress by using Slave FIFO application I changed in state diagram write sate equation.

Thank you.
with Best Regards,
Thrimurthi M
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