Hi, I want to test and build a simple Interrupt example for a custom board, connecting from an external signal using only UIO framework. I have connected the external pin with IRQ_F2P[0:0] interrupt line on Zynq IP I have added device tree fragment in system_user.dtsi &amba_pl { #address-…

The UioController class bridges the asyncio and UIO worlds and works by waiting on the UIO file and setting asyncio events when an interrupt is received. controller = UioController("/dev/uio0") event = asyncio.Event() async def interrupt_test(): while True: event.clear() controller…

Hi, Thanks for the detailed solution it worked nicely, for multiple interrupts, I followed external axi-int-controller in pl, just a side question may be its more related to python. In pynq interrupt service routine is using asyncio but i dont now how to run it in the background? Is there any sta…

As long as you are careful with the multi-threading aspects you can start a new thread to run the asyncio loop - cell 2 in this this notebook shows one way to go about doing this. You can then add tasks to run in the background to the loop using asyncio.run_coroutine_threadsafe as shown in the follo…

Hi, I want to read my BRAM on Linux of my PYNQ board, can you give any guide on this, will uio serve this purpose? if yes, can you give any reference material or tutorial for using UIO

Hello, It is best to use mmio for this. It allows you to read and write registers on memory-mapped buses such as AXI4. With Pynq, you can do this by loading your bitstream, then find the attribute corresponding to your IP using. The read and write methods of your IP objects are shortcuts for the m…

Hello, Thank you for your response, However, I think loading my bitstream, then using overlay.axi_xxxx.mmio.read to read will reset the values on my BRAM and give me a default value on the BRAM. I aim to read the data stored on my BRAM immediately after an inference, I noticed after the inference,…

Then set the option download=False when you load the bitstream in the Pynq API. It will keep your FPGA untouched.

Here is the relevant documentation page .

Thank you, will try and give a feedback. One more question, my 32b BRAM has a depth of 512, can I read the various data written on each array row?

Yes, just read at the corresponding address.

You need to reset the parser after the Overlay object is created as shown in here [image] Accessing an overlay from multiple python interpreters Support Hi, What pynq version are you using? In 2.7 I was able to do this using this piece of code import pynq ol = pynq.Ove…

Minimal simple Interrupt handling with UIO device in Pynq

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marioruiz January 27, 2022, 6:49pm 14

You need to reset the parser after the Overlay object is created as shown in here

Mario

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Minimal simple Interrupt handling with UIO device in Pynq

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