TM7000 Display module with SAMA5D4 Xplained running Android

9 Apr 2015

I've tried using the instructions on Android4SAM (Android4SAMv44 < Android4SAM < TWiki) but I've had no luck getting Android to work on Xplained with a TM7000 Display module.

I've been able to load the package for the SAMA5D4 Xplained, but it's meant for a 4.3" display ( Precision Design Associates - 43xx Series). All I get on the display is the initial white haze before fading to black. The SAMA5D4EK package loads but it also doesn't work. The initial Android screen opens correctly, but the touch doesn't work

Has anyone else had luck getting the the SAMA5D4 Xplained to work with the TM7000? Or, can someone give some instructions that explain how to get it work?

Any help is appreciated. Thanks.

Top Comments

noglitch over 10 years ago in reply to Former Member +1

From the top of my head, you can take the pda4 dtsi/dts files and change some details. Note that this only applies on a linux-3.10-at91 based kernel (the one of the demo actually): - the file names ;-…

clem57 over 10 years ago in reply to Former Member

No problem. Just wanted to make sure it was NOT the hardware. Android is a funny beast and I need more time to figure it out. It is Linux like but the driver support very different as you may know.
Clem
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Former Member over 10 years ago in reply to clem57

Thanks Clem.

I've had no problem getting the TM7000 to work with the linux packages, but I really want to use it with Android.
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noglitch over 10 years ago

The wires are not organized the same on sama5d3 vs. sama5d4 in 16bits mode. On PDA 4.3", we use the 24bits mode whereas on the PDA 7", the 16bits mode must be used: this is why we didn't produce a DTB for sama5d4 xplained with PDA 7" yet.

So, to have a solution, you would need to swap some wires on the ribbon cable and adapt some voltage levels... which is not easy I admit. Or wait for our production of a special ribbon cable that is design to match these new requirements.

Another solution, if you don't intend to connect your PDA 7" screen to any sama5d3 xplained system, would be to de-solder and re-solder the 0 Ohms resistors that stand at the back of the screen as two parallel series (must be documented in PDA's dataseet). Plus, you would need to provide 3.3V to the LCD through the pins 48-49 of the ribbon cable instead of 5V: for this, you would de-solder the R417 resistor and solder the R416 resistor (check the sama5d4 xplained schematics for more insight).
And the comprehensive documentation is here: http://www.atmel.com/Images/Atmel-44019-Cortex-A5-Microcontroller-Using-Display-Module-TM7000-on-SAMA5D4-Xplained-Ultra-…

Hope that it helps....
Bye,
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clem57 over 10 years ago

http://www.pdaatl.com/doc/tm7000_sama5d3xpld_qs.pdf try this out. It is linux, but can prove the hardware works with yours. Note the SAMA5D3 is close but not exactly the same. I would use the DTB for SAMA5D4 with the LCD support.
Hope this helps,
Clem
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