Portenta H7 RGB LED intensity control

Arduino Boards
1

Hi, as per Arduino Portenta H7 MicroPython Cheat Sheet | Arduino Documentation, the RGB LED intensity should be configurable by defining between [0, 255]. I don’t think it’s working though. I ran the following program to check and the intensity values of extremes seem to be inverted

import pyb

r_led = pyb.LED(1)

r_led.intensity(0)          # LED off
print(r_led.intensity())
pyb.delay(5000)

r_led.intensity(100)        # LED mid intensity
print(r_led.intensity())
pyb.delay(5000)

r_led.intensity(255)        # LED full intensity
print(r_led.intensity())
pyb.delay(5000)

Output:

OpenMV v4.8.1; MicroPython v1.26.0-77; Arduino Portenta H7 with STM32H747
Type "help()" for more information.
>>> 255
0
0

I suspect this is not a usable feature since there’s no pyb.LED(id).intensity() in class LED – LED object — MicroPython 1.26 documentation. Could you kindly confirm?

PC

2

Hi, LED intensity control on any STM32H7 boards is not preserved. The Timer used for that was used for the camera pixel clock.

3

Thanks for confirming Kwabena! Perhaps Arduino should update their docs :slight_smile:

PC