AXI GPIO too slow

Hi all,

I have a question regarding the AXI GPIO. Right now I have simple Block-Design with a ZYNQ and an AXI GPIO. The AXI GPIO is connected to one of the PMods and I am just toggling the Pins.

So far so good. Now the toggle frequency seems quite low. I set the FCLK_CLK0 to 50, 100 and 250 MHz and the frequency at which I am able to toggle the pmod pins is 1.1 MHz, 2.2 MHz and 3.8 MHz. Is it possible to get higher frequencies using the AXI GPIO? Did i forget something? For my project I need about 10 MHz.

I am using the ZedBoard Rev C1. Hope you guys can help me.

Thanks,

Hendrik

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0 jafoste4 over 9 years ago

Hello Hendrik,
Have you tried using a SPI Controller? If you need assistance with setting it up you can refer to the MicroZed IIOT Kit reference design we have. It should help with your performance due to performing your task in the Fabric versus you losing clock cycles on the PS side.
http://zedboard.com/support/design/13591/116
--Josh
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0 jafoste4 over 9 years ago

Hello Hendrik,
Have you tried using a SPI Controller? If you need assistance with setting it up you can refer to the MicroZed IIOT Kit reference design we have. It should help with your performance due to performing your task in the Fabric versus you losing clock cycles on the PS side.
http://zedboard.com/support/design/13591/116
--Josh
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