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PS interrupt PL

raymadigan

I am working with some legacy vhdl components and I need to find a way to coordinate the PS and the PL.  Is there a way to send general interrupts from the PS to the PL.

I am using DMA interrupts from the PL to the PS, but haven't found a way to signal activity from he PS to the PL.  The main problem is the vhdl starts up immediately and files queues before the PS can get started. 

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    Hello Raymadigan,

    Just to double check, are you using a zynq device? If so, open you Vivado Block Design, double click on the Zynq IP block, then go to Interrupts > PS-PL Interrupt ports. There you will see quite a few PS to PL interrupt ports. If none of these fit your requirements, you could use a PS GPIO to drive the VHDL input.

    There isn't much you can do about the PL starting up before the PS gets to your code. I would suggest that you devise some sort of "hold off" signal to your VHDL code. You could probably use the default level of a PS GPIO until the PS code is up and running.

    --Josh

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    Hello Raymadigan,

    Just to double check, are you using a zynq device? If so, open you Vivado Block Design, double click on the Zynq IP block, then go to Interrupts > PS-PL Interrupt ports. There you will see quite a few PS to PL interrupt ports. If none of these fit your requirements, you could use a PS GPIO to drive the VHDL input.

    There isn't much you can do about the PL starting up before the PS gets to your code. I would suggest that you devise some sort of "hold off" signal to your VHDL code. You could probably use the default level of a PS GPIO until the PS code is up and running.

    --Josh

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  • 0 in reply to jafoste4

    I got the IRQ_P2F_GPIO setup in the processor.  I connect this line as an input signal to the module that I wrote that throws away the data until the interrupt occurs.  

    In my ps code I don't know how to turn on this interrupt.  The GPIO functionality provides a mechanism to turn on the interrupt.

    I am using the GPIO to turn on and off the onboard led, but that is a physical pin, I don't know how to change the interrupt to a pin?  I don't even know if that makes sense.