I have struggled to get the motors work, but no success. I start to wonder if my DRV8833 motor driver board is broken.
Here are my connections:
DRV8833 vin --- battery + gnd --- battery - b_out1 --- motor b1 b_out2 --- motor b2
The Pokitto side, 3.3v:
POKITTO RASP.PI GPIO SOCKET gnd --- gnd(pin 25) ext14 --- miso (pin 21) ext15 --- mosi (pin 19)
When I set ext14 to high, it should start running the motor, but nothing happens. In Pokitto PEX everything should be ok, I have measured that normally ext14 and ext15 are in 0 v, but when I set ext14 to “1”, the voltage between PEX ext14 and gnd is about 3.3v, as expected.
I have also tested that if I connect the motor directly to the battery pack, the motor runs happily. I have also tested motor A connections in both sides but it do not work either.
So, is DRV8833 board broken or what could I check more?
Here is the schematic of DRV8833 board: