SAM E70(B) Xplained Ultra

[bathm]

Hi,
I want to run Zephyr on a SAM E70B Xplained ULTRA (XULT) eval board. In the board section there is only the SAM E70 XPLAINED (XPLD) board. I edited the .dtsi to adapt it to the schematic of the XULT (USER LED on PA05).
When I build and flash the sample samples/basis/button the firmware runs nice on the XPLD board. When I flash it to the XULT board there are only hieroglyphs at the UART output.

Here is the minicom output:

Any ideas? Thanks!

[nandojve]

Hi @bathm ,

Looking at schematics, both boards (E70_XPLD and E70_XULT) are using same UART-1 for console and are using same 12MHz crystals.
In this case, it should work. It'll be necessary investigate more to catch the problem and you need provide more information.

Note: SAM's boards with chip revision B have an explicit b, like sam_e70b_xplained, to select chip revision B headers files.

• Are you using below command to build your board to compile code with ?
  west build -b sam_e70b_xplained samples/basic/button
• What Zephyr version/revision are you using? #code

[bathm]

Hi @nandojve,
thank you for your reply.
To exclude the possibility of any hardware issues I've also tried another E70_XULT from a fellow student with the same result.

• Yes, I'm using chip revision B on both boards and I'm using the command west build -b sam_e70b_xplained samples/basic/button
• I'm using Zephyr v2.6.0-rc1

I'll compare both schematics again and try to find the difference between them.

[nandojve]

Hi @bathm ,

The evolution of Zephyr from one version to another is substantial. The current upstream/main is in stabilization phase for 2.7.0 ( LTS ), scheduled by end Sep/21.

I strong recommend you to use Zephyr main till LTS release.

• source: upstream/main (2.7.0 - LTS)
• SDK 0.13.0