Optixx

Got a new Toy. It’s a Juicebox from Mattel, a kids video and mp3 player. Actually it’s a linux based and has Samsung S3C44B0 ARM CPU, 8MB Flash and 2MB Ram. Since it has JTAG Pinouts you can use it as a really cheap ARM Dev Board. You can’t get one for around $10 at ebay. You find a lot of good info here.

Made some LCD test stuff, a 3d starfield and a simple fire demo. This code runs directly on the hardware not on top of the build-in linux. You need a JTAG cable to download the code directly into the RAM.

I’m using openocd for this:

halt 
wait_halt 
poll 
load_binary lcd_3.bin 0x0c001000 
resume 0x0c001000

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Ported the glcd lib to the Epson based Nokia LCDs. I tried to leave the code portable so that you can switch between the Epson and the Philips controller via a #define switch.

Actually i only changed the lowlevel hw access and init functions to deal with the Epson controller. Currently native screen rotation is implemented but i didn’t work on the hardware scrolling stuff. May i’ll do this later.

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Got my Nokia 6100 LCD working. Long story of failures. First try was a LCD with a Epson controller from ebay for 10 Euros. But somehow someone failed to solder the smd socket proberly and it went a way ( thx max ) .

Next try was a Epson based LCD including a header board from sparkfun . But this time i wasn’t able to run some demo code which was made for the LPC2138 on my LPC2148. I think the board was to fast to talk to the display. I wasn’t able set up SPI on the LPC2148 correct. Need more investigation on that topic.

So i gave up at this point and decided to go for a atmega16. I did a devel board for that which is losy based on this schematics. The boads uses simple parport icsp and has a serial line for debugging and sending data.

Finally i threw some code together using the init commands found in this project. Added support for receiving images via uart and wrote an little python client for sending images.

Future plans are to port the glcd lib to the epson based lcd.

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