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Posted

I bought a cheap Tochscreen from China on ebay.

After some try and error i was able to get it running. It is working quite well.

I had some problems with the touch module using the i2c on J8/9. So i had to use some gpio pins on J5A/J5B.

 

I used the UTFT Library from Henning Karlsen as a starting point.

 

Maybe someone is interested in the code.

 

post-11327-0-79416500-1357401426_thumb.j

 

here the link to the display on ebay:

http://www.ebay.de/itm/3-2inch-lcd-module-with-touch-panel-bulid-in-SSD1298-controller-PCB-board?item=170863074266&ih=007&category=26206&cmd=ViewItem

Posted

Don't you need bidirectional signals to make good use of the controller for this display? Because this display look pretty similar to the display i have based on the ILI9320 controller.

Posted

The pcb beneath the dispay is forcing me to use the 16bit parallel mode of the 1298 controller. i could read out data from the diplay, but i had no reason to do it yet.

i am not capable of getting the display to work in 8bit mode. i can't find the fault and it is driving me mad. they mouted a 74HC573 latch on the pcb to use the 16bit mode with 8 bit input, instead of making it possible to enable the nativ 8bit mode of controller.

Posted (edited)

Yes that looks exactly the same as the ILI9320 based displays that we bought Shuriken.

 

I did manage to get a MIOS32 driver written and working for it in 8-bit mode but since then I have had a bit of a crash and I think I lost the source code :(

 

If I remember correctly, the key to getting 8-bit mode working was that you place the LE pin high then load the lower 8 bits onto DB08-DB15 and then set LE low and load the upper 8 bits. the transition of low to high latches the current state of the inputs on the 74HC573 (DB08-DB15) and outputs them to DB00-DB07, this has the effect of loading all 16 bits to the display, you can then pulse the clock.

 

Cheers


Phil

 

EDIT: Also DO NOT tie the unused DB00-DB07 inputs to ground, they MUST be left floating as otherwise it won't work in 8bit mode!

Edited by philetaylor
  • 4 months later...
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