I have a i.MX7D SABRE, trying to run demo apps for the M4 while booting linux for the main CPU. Currently running Linux imx7dsabresd 4.1.15-1.1.1+gd5d7c02 for the Cortex-A7, with default uboot.
Followed the instructions here on NXP to boot up demo apps for Cortex-M4, but to no success. Nothing is showing on the serial (Double checked COM port settings, running on PuTTY).
Tried with binaries compiled via ARM GCC with CMAKE on windows and linux, as well as a pre-built binary from here.
Am I missing anything obvious? Or are there settings that I should take a look into?
Thanks in advance.