So I have a SAMA5D4 from Element 14 and wanted to try to pre-empt the issues we experienced last year with the SAMA5D3's, this was a distinct lack of working drivers and samples
With the Help of Christian doctorcdf and Atmel, I now have got many things actually working on the SAMA5D4... YAAAAAAA
so what have I achieved and will of course share with your all now for experimenting on your boards. the IO post can be found here :- SAMA5D4 Xplained Ultra - Tips and Tricks #2 - Using the built in IO and external devices
Chip PDF doc:
Displays and matching OS images found with upload batch files
HDMI - Check works for the demo but not as a console
4.3" LCD... not so much, kind of works but needs some tweaking to say the least and touch does not work, I do not currently have the right model 4.3" LCD but if I get one I will update my findings
7" TM7000 - Check, again works for the demo but not as a console (Yet)
Headless - Check
Cool I/O stuff
Built in 12 bit ADC working 
, a few channels tested and will demo in command line and python
PCF8574 8 bit I2C port expander, done and tested, again will show in command and python
DAC8574 driving the TI 4 channel DAC, (Yes I know, one hell of a co-incidence on the numbers ) again will show in command and python
So first things first, where to find the images and the displays
1. the following link is the standard place for the demo images but it only has the batch and TCL file for the headless board
GettingStarted < Linux4SAM < TWiki
image here: ftp://www.at91.com/pub/demo/linux4sam_4.6/linux4sam-poky-sama5d4_xplained-4.6.zip
Help on loading the images can be found here:- http://www.atmel.com/Images/Atmel-42328-Using-SAM-BA-for-Linux-on-SAMA5D3-Xplained_Training-Manual_AN8995.pdf
2. 4.3" LCD Display (You really need this display for it to work correctly PDA - TM4301 EMBEST Human Machine Interface - Touch Screen | 49X9922 | Newark element14 Canada
Image here: ftp://ftp.linux4sam.org/pub/demo/linux4sam_4.6/linux4sam-poky-sama5d4_xplained_pda4-timesys-demo.zip
3. HDMI Image here: ftp://ftp.linux4sam.org/pub/demo/linux4sam_4.6/linux4sam-poky-sama5d4_xplained_hdmi-video-demo.zip
4. TM7000 7" lcd can be bought here: PDA - TM7000 EMBEST Human Machine Interface - Touch Screen | 49X9923 | Newark element14 Canada
Image here: ftp://ftp.linux4sam.org/pub/demo/linux4sam_4.6/linux4sam-poky-sama5d4_xplained_pda7-timesys-demo.zip
A bunch of material to guide using this display with the D4
http://www.pdaatl.com/doc/tm7000_sama5d3xpld_qs.pdf, http://www.pdaatl.com/doc/tm7000.pdfhttp://www.pdaatl.com/doc/tm7000_sama5d3xpld_qs.pdf
in order to use the TM7000 on the D4 you need to perform SMD soldering to move quite a few resistor jumbers, this is detailed in this PDF
Basically all the images I used and more can be found here ftp://ftp.linux4sam.org/pub/demo/
Read up on SAMBA SoftwareTools < Linux4SAM < TWiki
A little board you may find useful for experimenting (I don't have one but I found reference to it so thought I would share ) http://www.atmel.com/Images/Atmel-42078-IO1-Xplained-Pro_User-Guide.pdf
The demo can be found in the folders under the /OPT/* once the image has been uploaded
Even though I now pointed out complete files ready to go, the following info shows how to edit the files as needed (Future reference)
additional info provided by Thomas from Atmel (Thanks Thomas )
In order to support either the HDMI or the TM4301 from PDA, you will need to edit the TCL file below you will find in the package: (demo_linux_nandflash.tcl)
File to edit : demo_linux_nandflash.tcl:
## Files to load
set bootstrapFile "sama5d4_xplained-nandflashboot-uboot-3.7.bin"
set ubootFile "u-boot-sama5d4_xplained_nandflash.bin"
set kernelFile "zImage-sama5d4"
set rootfsFile "atmel-xplained-demo-image-sama5d4_xplained.ubi"
## board variant
set boardFamily "at91-sama5d4"
set board_suffix "_xplained"
#set board_suffix "_xplained_hmi"
#set board_suffix "_xplained_mda4"
## dtb option
set use_dtb "yes"
## uboot env option
set build_uboot_env "yes"
## now call common script
source demo_script_linux_nandflash.tcl
~
there is also a training PDF Thomas provided that helped allot in getting the board working as I wanted including using the IO, it is for the SAMA5D3 and I had some things to change but it was a great help to get things going so it is attached to this post.
My next post will cover my work on the I/O including ADC, DAC, I/O and I2C stuff and a ton of working examples.
 | hands-on_AN-8493_SAMA5D3-Xplained_Linux_GetStart_AN-8493_SAMA5D3-Xplained_Linux_GetStart.pdf |
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