OpenMV3 and PCA9685 module communication errors

main.py: from pyb import I2C import time from servoctrl import ServoCtrl i2c = I2C(2, I2C.MASTER) # The i2c bus must always be 2. servos = ServoCtrl(i2c) servos.position(0,90) time.sleep(1000) servos.position(0,0) time.sleep(1000) servos.position(0,90) time.sleep(1000) servos.position(0,0)

pca9685.py: import ustruct import time class PCA9685: def __init__(self, i2c, address=0x40): self.i2c = i2c self.address = address self.reset() def _write(self, address, value): self.i2c.mem_write(bytearray([value]), self.address, address ) def _read(…

servoctrl.py： from pca9685 import PCA9685 import math class ServoCtrl( PCA9685 ): """ Servo Controleur - Allow you to control the servo 0 to 15 on the PCA9685 PWM Driver """ def __init__(self, i2c, address=0x80, freq=50, min_us=600, max_us=2400, degrees=180): PCA9…

Is there an error in the I2C communication program call?

Hi zz2633105, So, not trying to be mean here. But if you want an answer to your problems on the forums you need to structure your question in such a way that I can answer it. You just gave me a lot of code dump with no context. Can you please try to narrow down the exact line of code that has the …

That code looks a lot like my library for the PCA9685 chip available here: GitHub - adafruit/micropython-adafruit-pca9685: Micropython driver for 16-channel, 12-bit PWM chip the pca9685 but some things are changed. I’m using that library with my servo shield, and it works fine, so if it doesn’t work…

Ah, I see the problem. You are using i2c from pyb, while this library expects i2c from the machine module, which has a different API.

Ah, I see the problem. You are using i2c from pyb, while this library expects i2c from the machine module, which has a different API. Can you give detailed advice? [image] [pca9685.png]

Hi zz2633105, So, not trying to be mean here. But if you want an answer to your problems on the forums you need to structure your question in such a way that I can answer it. You just gave me a lot of code dump with no context. Can you please try to narrow down the exact line of code that has th…

Hi, can you edit your post and re-post your code using the tags? That way the formatting will not be removed.

I2C communication error

OpenMV Boards

iabdalkader April 29, 2017, 5:49pm 18

This issue was resolved on github. Seems we have a Chinese community and we don’t know about it

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I2C communication error

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