Trace Analyzer Arduino IOP PYNQ-Z2

Support
1
  • PYNQ version: 3.0.1
  • Board name: PYNQ-Z2 TUL

Hello,

I’m trying to use the trace analyzer for the Arduino IOP, that’s supposed to be included in the Base Overlay. However, looking at the code in the PYNQ repo it seems that it’s actually not included in the PYNQ-Z2 base overlay. Was it forgotten or did I miss something? This is surprising as in the documentation it is mentioned that there are Trace Analyzers linked to all the IOPs:

image
image835×431 22.8 KB

Here is my code on Jupyter Notebook, it’s very basic and I’m going step by step. I’m gonna get myself a logic analyzer but I wanted to check out the trace analyzer for the arduino and test my UART code..

from pynq.overlays.base import BaseOverlay
base = BaseOverlay("base.bit")

trace_analyzer = base.trace_arduino

# trace_analyzer.setup(frequency_mhz=0.1, num_analyzer_samples=65535)
# from pynq.lib import MicroblazeLibrary

# UART_RXD = 0 ## Arduino pin 0 is RXD
# UART_TXD = 1 ## Arduino pin 1 is TXD

# lib = MicroblazeLibrary(base.iop_arduino, ['uart'])
# uart = lib.uart_open(UART_TXD, UART_RXD)

# read_command = [0xDE, 0xAD, 0xBE, 0xEF]
# uart.write(read_command, len(read_command)) ## Write an iterable list of bytes

# response = [0x00] * 4
# uart.read(response, 4) ## Request a 4-byte response

# uart.close()

Here’s the error message:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [14], in <cell line: 4>()
      1 from pynq.overlays.base import BaseOverlay
      2 base = BaseOverlay("base.bit")
----> 4 trace_analyzer = base.trace_arduino

File /usr/local/share/pynq-venv/lib/python3.10/site-packages/pynq/overlay.py:363, in Overlay.__getattr__(self, key)
    358 """Overload of __getattr__ to return a driver for an IP or
    359 hierarchy. Throws an `RuntimeError` if the overlay is not loaded.
    360 
    361 """
    362 if self.is_loaded():
--> 363     return getattr(self._ip_map, key)
    364 else:
    365     raise RuntimeError("Overlay not currently loaded")

File /usr/local/share/pynq-venv/lib/python3.10/site-packages/pynq/overlay.py:931, in _IPMap.__getattr__(self, key)
    929     return mem
    930 else:
--> 931     raise AttributeError(
    932         "Could not find IP or hierarchy {} in overlay".format(key)
    933     )

AttributeError: Could not find IP or hierarchy trace_arduino in overlay

Here’s the screenshot showing the difference in the base.py for PYNQ-Z2 vs PYNQ-Z1:

PYNQ-Z2:

image
image657×577 30.7 KB

PYNQ-Z1:

image
image683×707 34.6 KB

You can see that there are some missing in the PYNQ-Z1 and some missing in the PYNQ-Z2

2

Hi @NezhaZ,

Welcome to the PYNQ community. The PYNQ-Z2 does not have a a trace_analyzer for the Arduino pins, the PYNQ-Z1 does.

Where did you see this in the documentation?

Mario

1 Like
3

Hi @marioruiz ,

Thanks! So I found that in the official PYNQ-Z2 documentation :sweat_smile:

https://pynq.readthedocs.io/en/latest/pynq_overlays/pynqz2/pynqz2_base_overlay.html

Any idea why the Arduino IOP doesn’t have a trace analyzer?

Nezha

4

I think it is probably because the base overlay uses almost 100% of the resources

1 Like
5

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