Connection and Setup of Nokia 6100 Knockoff

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Contents

Hardware

Components

Connecting the LCD

I got some nifty headers and sockets from digikey to make it easy to unplug SPI devices from the Gumstix. It takes a little more work but I thought it was worth it. Soldering your hook-up wire to the boards will work just as well. This setup uses the NSSP breakout on the back of the GPSstix.

NSSP Pin LCD Board Pin
CLOCK SCLK
VCC +Vin
FRAME CS
MISO RST
MOSI SDATA
GND GND

Software

Add summery

Enabling SSP in the Kernal

    • Note: Add locations for the current kernel

In order to compile the kernel module you need to enable SSP in the Kconfig file. I lifted instructions on how to do that from an email int he archives from Dave Hylands.

So the kernel has these configuration files, normally called Kconfig. As a driver writer, you would normally add an entry into this file for your new driver. If you wanted to arbitrarily enable PXA_SSP for a gumstix, then I would edit the build_arm_nofpu/linux-2.6.15gum/arch/arm/Kconfig file, find the following entry 


    config ARCH_GUMSTIX
         bool "Gumstix Platform"
         depends on ARCH_PXA

and change it to: 


    config ARCH_GUMSTIX
         bool "Gumstix Platform"
         depends on ARCH_PXA
         select PXA_SSP


Now, when you use "make ARCH=arm menuconfig", it will add the entry

CONFIG_PXA_SSP=y

build_arm_nofpu/linux-2.6.15gum/.config file. For more infomation on the kernel configuration stuff, this files in build_arm_nofpu/linux-2.6.15gum/Documentation/kbuild would be worthwhile reading.

Enable the SPI Kernel Module

Use 'make ARCH=arm menuconfig' Go To: Device Drivers-->SPI Support-->

Select:

  • SPI Support
  • Bitbanging SPI Master
  • PXA2xx SSP SPI Master

Save your changes, recompile the kernel and reflash the gumstix (or whatever process you use to update your kernel)

Compiling Test Kernel Module

I have managed to get a test graphic displayed using this kernel module code by Dan Taylor as reference. http://www.logicalgenetics.com/forums/viewtopic.php?p=6418

Download the test package.

Nokia_Screen_Test.tar.gz

Extract in the same location as your buildroot. If you don't you will have to edit the Makefile to point make at the buildroot. Make the module and get it onto your gumstix. On the gumstix do 'insmod sspscreen.ko' if everything is ok you will get a test pattern on the LCD.

Next Steps

That is it for now. Its a small start but a start none the less. Write a proper driver. Write a framebuffer driver. (Please feel free to help out as I am still new to kernel programming)

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