Hello :slight_smile: I need some help getting the SPI Bus on the a Pi Pico to work. By now I tried a bunch of different ADXL345 boards and Picos always with the same result. I am trying to follow this guide: Reddit - Dive into anything When I use hardware SPI spi_bus: spi0a Klipper crashes with …

Did you follow Measuring Resonances - Klipper documentation , especially [mcu rpi] serial: /tmp/klipper_host_mcu [adxl345] cs_pin: rpi:None [resonance_tester] accel_chip: adxl345

This doesn’t apply. He’s connecting the adxl345 to the Pico, not the Pi. I would need to see a log of the issue. Using spi0a should be correct as long as the MCU is configured properly and connected to Klipper.

Hey Jake, sure, here you go: Starting Klippy... Args: ['/home/pi/klipper/klippy/klippy.py', '/opt/klipper_fw/config/printer.cfg', '-I', '/tmp/printer', '-l', '/home/pi/klipper_logs/klippy.log', '-a', '/tmp/klippy_uds'] Git version: 'v0.10.0-227-gbabb067b' CPU: 4 core ARMv7 Processor rev 3 (v7l) Py…

I have a Pico and tested on my machine right now. Works as expected. My config. [mcu pico] serial: /dev/serial/by-id/usb-Klipper_rp2040_E6605481DB509336-if00 [adxl345] spi_bus: spi0a cs_pin: pico:gpio1 [resonance_tester] accel_chip: adxl345 probe_points: 125,125,20 You have the wrong CS pi…

Aww f* me … thx! That was the input I needed! Turns out I had the ADXL345 section defined twice! Once in the printers.cfg and then in an include. Apparently the last definition wins. Cleaned up the config, it works now Srsly, thank you! I spend the last few evenings trying to make that one work. …

Yes, for future reference if something is defined twice, the last definition “wins”.

PiPico -> Unknown spi_bus 'spi0a'

General Discussion

Sineos January 14, 2022, 11:00am 8

Seems a nice option. For future reference Raspberry Pi Pico + ADXL345: Portable resonance measurement

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PiPico -> Unknown spi_bus 'spi0a'

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