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Using Blinka for with Micropython in a Raspberry Pi Pico

See original GitHub issue

I was trying to follow learning guide https://learn.adafruit.com/circuitpython-libraries-on-micropython-using-the-raspberry-pi-pico

Hardware

MicroPython v1.15 on 2021-04-18; Raspberry Pi Pico with RP2040

However I Used a different Sensor I used an Adafruit ADT7410 I2C Temperature Sensor with the latest Blinka 6.9.1 and plataform detect 3.13.1

Results

While reading the sensor the following I got the following error message:

Traceback (most recent call last):
  File "<stdin>", line 10, in <module>
  File "/lib/adafruit_adt7410.py", line 94, in __init__
  File "/lib/adafruit_adt7410.py", line 130, in _read_register
  File "/lib/adafruit_bus_device/i2c_device.py", line 125, in write_then_readinto
  File "/lib/busio.py", line 147, in writeto_then_readfrom
  File "/lib/adafruit_blinka/microcontroller/rp2040/i2c.py", line 55, in writeto_then_readfrom
AttributeError: 'I2C' object has no attribute 'writeto_then_readfrom'

Issue Analytics

State:
Created 2 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

1reaction

makermelissacommented, May 20, 2021

It’s actually a good one because it’s failing and it’s a problem I can reproduce.

1reaction

makermelissacommented, May 20, 2021

I’m working on this. I’ve added this on my board, but it’s somewhat consistently returning the incorrect value for the ID. According to docs and code, it should return 0xC8, but I’m getting stuff like 0x90, 0x98, 0xA0, 0xA8, and 0xB0. The characters returned right before and after are consistently always 0x0A and 0x80. I’ve tried adding delays, but that didn’t help.

I’ll try different speeds to see if that makes a difference. I might need to hook up a saleae to see if it’s actually returning those values. Also, it may be related to https://github.com/adafruit/Adafruit_CircuitPython_ADT7410/issues/4.