Re: [Gumstix-users] Help with Robostix Configuration

[Dave H. <dhy...@gm...>]

Hi Russ,

> I have a Connex200xm, Robostix, Wifistix stack. I'm using Buildroot version
> 1629 which has linux version 2.6.21. I'm pretty new to using Gumstix, but I
> was able to get wireless working using the threads on this forum. Now, I
> want to configure my stack so that I can use the I/O pins on the Robostix.
> I've searched through the forums and not had much luck. Essentially, I'm
> trying to connect a dual h-bridge motor controller (L298 Compact Motor
> Driver Kit from Solarbotics) to the Robostix so I can control it from the
> Gumstix. It asks for 5 I/O pins in the instructions for the motor driver. Is
> it possible to use 2 of the PWM connections on the Robostix? Could anyone
> please help me configure my setup? Any help will be greatly appreciated.

The I/O pins on the robostix connect to the ATMega128 processor on the
robostix. So you'll need some code running on the robostix to make
anything work.

I wrote some demonstration code that allows pins on the robostix to be
manipulated from the gumstix. It's called i2c-io.

You'll need to first program the i2c-Bootloader onto the robostix
<http://docswiki.gumstix.com/Robostix_i2c_bootloader>

You may want to use the the gumstix as the programmer:
<http://docswiki.gumstix.com/Robostix_gumstix_ISP>

Then you'll need to use i2c-load to load the i2c-io.hex file:
<http://docswiki.gumstix.com/Robostix_i2c_load>
<http://docswiki.gumstix.com/Robostix_i2c-io>

Then you can use i2c-io to manipulate registers in the ATMega128.

To connect the motor driver, you'll need a PWM output and a GPIO pin
for each motor.

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/