Simple I/O control using PYNQ

RE: Simple I/O control using PYNQ

kevin_v — Thu, 21 May 2020 20:26:37 GMT

Thank you Fred to putting this up.

For 2 weeks i have been trying to figure out how to uses the Arduino component on the pynq board. The last 4 days i was trying to get an eternal LED to turn on but couldn't figure out how to select the gpio i wanted and how to output from it.

You have ended my suffering. Once again thank you!

RE: Simple I/O control using PYNQ

DAB — Wed, 13 May 2020 20:34:33 GMT

Thanks for sharing.

I wanted to follow this course, but my time was overtaken by events.

DAB

RE: Simple I/O control using PYNQ

Fred27 — Wed, 13 May 2020 18:31:01 GMT

After more digging I can send something out on the I2C pins without crashing anything. The magic seemed to be using i2c_device 0 and not bothering with set_pins. However what comes out is not valid I2C. It appears to be just one byte roughly resembling the I2C address for both write and for read.

[View:/resized-image/__size/620x279/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-a707c062-5b07-4472-8172-58b011a26a69/3056.contentimage_5F00_206995.png:620:279]

RE: Simple I/O control using PYNQ

yuricts — Wed, 13 May 2020 11:10:42 GMT

https://pynq.readthedocs.io/en/v2.5.1/pynq_libraries/pynq_microblaze_subsystem.html#examples

from pynq.overlays.base import BaseOverlay

from pynq.lib import PynqMicroblaze

print(base.is_loaded())

#print(base)

help(base.iop_pmoda)

help(base)

lib = MicroblazeLibrary(base.PMODA,[])

This last line appears to reset the complete microblaze... wiping the flash_led() function as welll :-(

RE: Simple I/O control using PYNQ

jc2048 — Wed, 13 May 2020 10:19:36 GMT

I don't know anything about this at all, but there's some info here that might help [the section headed 'Controlling the IO Switch'], if you haven't seen it already

https://pynq.readthedocs.io/en/v2.4/overlay_design_methodology/pynq_microblaze_subsystem.html

That seems to say that, for the Arduino header, it's fixed and can't be moved to alternate pins.

RE: Simple I/O control using PYNQ

weiwei2 — Wed, 13 May 2020 01:21:27 GMT

i am also trying to achieve similar, although i am still testing with other PYNQ board [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-a707c062-5b07-4472-8172-58b011a26a69/contentimage_5F00_1.png:16:16]