Issues when using camera driver in parallel with PWM

lemariva / uPyCam

Take a photo with an ESP32-CAM running MicroPython

https://lemariva.com/blog/2019/09/micropython-how-about-taking-photo-esp32

Apache License 2.0

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Issues when using camera driver in parallel with PWM #8

Open jischebeck opened 4 years ago

jischebeck commented 4 years ago

Hi Lemariva,

the driver is great and works perfect standalone.

When combined with PWM to control servos, either the system reboots, fails to initialize the camera or the servos don't work anymore.

Could it be due to the Timer used? TIMER_0 for Camera, TIMER_1 for PWN ? Do you have any idea?

Jan

I added the following PWM to the webcam.py: servo_r = machine.PWM(machine.Pin(12), freq=50,duty=0) servo_l = machine.PWM(machine.Pin(13), freq=50,duty=0)

lemariva commented 4 years ago

Do the servos work without the camera driver? Usually I have the problem that the servos drain too much current and the board reboots. or
It could be a memory problem, this means, the board runs out of memory.

jischebeck commented 4 years ago

It works fine without the camera driver. If I run it on different channels / timers it works fine. At https://robotzero.one/esp32-cam-rc-car/ someone run into the same problem, and got it solved with different channels.

Unfortunately, this can't be repeated easily using micropython, as there you cannot change the channels/times.