LLCE example and U-boot

[GioMusto]

Hello.

I'm trying to make the LLCE examples work on the Goldbox.

I modified the CAN2CAN example a little bit, and it works if I debug it from S32DS.

If I try to run it from U-boot, however, it executes, but hangs U-boot itself.

These are the commands I'm running:

dcache off; mw.q 0x34000000 0x0 0x100000; dcache on

fatload mmc 0:2 ${loadaddr} /llce.elf

bootm7 ${loadaddr} VTABLE

I can see the CAN traffic on the bus, so the example is running, but U-boot hangs and is not able to accept commands anymore.

After some debugging, I was able to trace the problem to the PlatformInit() call, and in particular the code to set the clock.

If I remove that code, however, the example does not work anymore.

Do you have any suggestions?

[chenyin_h]

Hello, @GioMusto 

Thanks for your post.

The issue you mentioned may be caused clock or other resource confliction between M and A side.

1. On S32G product, under default settings, the BSP running on A53 side is designed under the assumption that it has exclusive access to the system, and therefore does not consider potential conflicts introduced by other software components, while in your M core application, it may also touch critical resources like clock/memory, etc. You have to careful about every part of the code, to avoid any possible confliction/re-configuration for critical resources.

2. For running both M7 application and Linux BSP simultaneously, the recommended way is to firstly running a M7 bootloader to manage the resources, as introduced via AN13750 

BR

Chenyin