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snehal_p's avatar
snehal_p
Icon for Contributor rankContributor
3 years ago
Solved

Increase frequency of HPSGPIO

Hello, How can we increase the HPS gpio frequency? I'm driving Shift register CD4094 from HPS. Can I increase the frequency of clk generated from hps to drive cd4094? what is the maximum frequenc...
  • aikeu's avatar
    aikeu
    3 years ago

    Hi snehal_p,


    I try to check further regarding the gpio limitation on arm cortex a9 for the HPS.

    It shows that:

    "The PL061 PrimeCell General Purpose Input/Output (GPIO) is an AMBA compliant SoC peripheral that is developed, tested, and licensed by ARM Limited. Use the GPIO to generate or detect low frequency signals (less than 1MHz)."

    https://developer.arm.com/documentation/dui0440/b/programmer-s-reference/general-purpose-input-output--gpio

    It seems that the frequency you are capable of generating also meet around that range due to the limitation of the GPIO regardless of the instruction cycles which involves in the gpio toggling operation.


    Thanks.

    Regards,

    Aik Eu


aikeu's avatar
aikeu
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi snehal_p,


I’m glad that your initial question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread.

Anyway feel free to provide a good survey feedback if receive any. Thank you!


Thanks.

Regards,

Aik Eu


snehal_p's avatar
snehal_p
Icon for Contributor rankContributor
3 years ago
Hello Aik Eu,
Below is the link to the HPSGPI interrupt thread, Can you please help with this topic.
community.intel.com/t5/FPGA-SoC-And-CPLD-Boards-And/How-to-configure-and-use-HPSGPI-pin-as-interuppt/m-p/1478175#M24671

Thanks,
snehal_p