CM0+ Application on CYT4BF

[isystem_user]

Hi,

on my CYT4BF device i have an Autosar Application running only on CM7 core. For Bootcore CM0+ there is no application available. How do i manage the correct startup and "running" behaviour for the CM0+ core?

Thanks,

Martin

[Apurva_S]

Hi Martin,

You can find the CPU startup sequence for CYT4B in section 3.2.3 of the following application note - https://www.infineon.com/dgdl/Infineon-AN220118_GETTING_STARTED_WITH_TRAVEO_II_FAMILY_MCUS-Applicati...

Let me know if this answers your question.

Regards.

[isystem_user]

In my autosar application for CM7 the ECU is hanging at function: Fls_InvokeFMAPI 

The Elektrobit support answered to this issue:

"Fls driver can be run from CM7 itself. Actual programming is initiated through system calls which can be executed only from CM0+. Fls driver uses IPC to invoke the system calls in CM0+.

So whenever you use Fls in the application, core CM0+ needs to run because FLS will use system calls from that core.

If CM0+ is not started and runing, the Fls driver hangs in Fls_InvokeFMAPI same as customer reported. "

My conclusion is that the CM7 uses IPC messages for invoking system calls on CM0+. The root cause of this issue potentially is on CM0+ core. How can i check if CM0+ is running correctly? 

[Apurva_S · Accepted solution]

Hi @isystem_user 

•  Please go through the first question in the following document to check if your system call is working fine - https://community.infineon.com/t5/Knowledge-Base-Articles/Traveo-II-Automotive-Body-Controller-FAQ-B...
• You can also go through '37. Nonvolatile Memory Programming' chapter in the Architecture TRM to learn more about system calls.
• As already mentioned in my previous response, the following application note has the detailed startup code for CM0+ core - https://www.infineon.com/dgdl/Infineon-AN220118_GETTING_STARTED_WITH_TRAVEO_II_FAMILY_MCUS-Applicati...
• You can also go through the actual startup file present in the SDL to understand the steps better. You can download the latest version of the SDL from here - https://www.infineon.com/cms/en/product/microcontroller/32-bit-traveo-t2g-arm-cortex-microcontroller...
• Since this is an MCAL related question, I request you to contact your local sales representative or FAE to get more support.

Regards.