Pynq z1 uart

Support
1

I am trying to send data to my PYNQ Z1 board via UART on the ARM CPU instead of microblaze on PYNQ with a python code, i don’t want to use microblaze because i already have an overlay to be loaded on the ZYNQ fpga,
I didn’t find any tutorials on how to do that

2

We need more information to be able to help you. The use case is not very clear to me. Why do you want to do this? I suppose you can just use terminal connection directly through Putty?

3

I want to send data to my PYNQ using PS UART0 using USB-UART where a few processing is made on the data in my Overlay, then i want to write this processed data (results) again to my PC using the same UART, I couldn’t find the commands in Jupyter notebook or Putty to do this.

4

I’ve achieved this by using the serial Python package. When connected to the PYNQ’s USB HOST, your device should be visible at the OS-level on the board (e.g., as /dev/ttyUSB0). Then you can write a script that initializes your UART/serial bus like so:

ser = serial.Serial(‘/dev/ttyUSB0’, baudrate=9600, timeout=0.5)

Data can then be sent & received using the methods:

ser.flushInput()
ser.write(payload)
resp = ser.read(4)

Hope that’s what you’re looking for & may be of some help.

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