Raspberry Pi Forums

Hi,

I am following primarily this tutorial: http://computers.tutsplus.com/tutorials ... -cms-20051

but I have also looked at http://roverpi.blogspot.co.uk/2013/07/c ... -with.html and the adafruit one.

Everything works fine except the second motor will not go in reverse. I have tried swapping wire and pin numbers (as suggested in the comments) but still not luck. Any suggestions appreciated?

Regards,

Alex

The chip could be faulty.

More likely your wiring is wrong. Photos and/or diagrams of your set-up would help.

Hi Joan,

I am wiring it exactly as in the diagram in the tutorial and have now wired it many times with the exact problem always happening.

Cheers,

Alex

I am following primarily this tutorial: http://computers.tutsplus.com/tutorials ... -cms-20051

This tutorial use GPIO pins which could be used for the SPI.

Maybe the SPI is enable.

In the file /etc/modprobe.d/raspi-blacklist.conf, the line with "blacklist spi-bcm2708" should be there and with no '#' in front.


N.B. Use LED to visually check if your GPIOs works.

Daniel