PicoBorgRev: wrong motor behavior on one side

I forgot to mention, I traced the I2C communication at the Linux kernel level (I could also check on the wire to make sure the actual data sent is right), and this is what I get:

p.SetMotor1(-1) # buf = [ [0] = 0x7, [1] = 0xFF ] }
p.SetMotor1(-0.9) # buf = [ [0] = 0x7, [1] = 0xE5 ] }
p.SetMotor1(-0.2) # buf = [ [0] = 0x7, [1] = 0x33 ] }
p.SetMotor1(0.2) # buf = [ [0] = 0x6, [1] = 0x33 ] }
p.SetMotor1(0) # buf = [ [0] = 0x6, [1] = 0x0 ] }

This all looks like good values. The result I get is:

p.SetMotor1(-1) # motors stopped (wrong)
p.SetMotor1(-0.9) # motors going forward very slowly (wrong)
p.SetMotor1(-0.2) # motors going forward very fast (wrong)
p.SetMotor1(0.2) # motors going forward slowly (right)
p.SetMotor1(0) # motors stopped (right)

Thanks for the reply. Actually, I did some more investigation. I'd like to try to repair it myself if possible (obviously taking responsibility if I make it worse :)). If I screw up I'll buy a new board.

It seems like the direction/reverse pin on the Microchip microcontroller is fried, it always output 0. That explains the behavior I described. It probably fried when I accidentally shorted it with the 12V pin that is right next to it no the H-bridge chip (pins 5 and 6), when trying to check something with my multimeter (oops).

I have ordered a replacement chip on Digi-key, and will get some help from the tech at my university to replace it (apparently they do that often). I have access to a Pickit 3 to reprogram it. I suppose just need to download the source from [1], build it with MPLAB X and flash it on the chip?

Thanks for your help!

[1] https://www.piborg.org/downloads/picoborgrev/PicoBorgRev.X.zip