CCS/TMS320F28388D: How to use BIOS_exit

user6114104

Part Number: TMS320F28388D

Tool/software: Code Composer Studio

Hi Scott,

Now I have build a TMS320F28388D project, in which both CPU1 and CM core running on SYS/BIOS. As is known to all, CM could communicate with CPU1 on IPC channels.

If I want to control the process of power off for CM and CPU1, I think that the BIOS on CM core should exit firstly, and at the same time, CM core should tell CPU1 that it clould shutdown now. And then the CPU1's BIOS also exit once received the notification from CM side. Until now, the CPU1 could release the power hold pin, and the TMS320F28388D goes to shutdon safely.

However, what should I do with the exit of BIOS, must I call BIOS_exit? And how to cope with BIOS_exit?

Thanks a lot!

over 5 years ago

0 Santosh Jha over 5 years ago

TI__Guru 50611 points

Hi,

I think Bios_exit() can be called to exit the application normally. Internally it should call System_exit().

0 user6114104 over 5 years ago in reply to Santosh Jha

Intellectual 720 points

Hi Santosh,

if I don't call Bios_exit() before power off, dose it make any difference once power on again?

Thanks.

0 Santosh Jha over 5 years ago in reply to user6114104

TI__Guru 50611 points

As per my understanding, it should not make much difference. However, I think it is better to call Bios_exit() to make sure bios scheduler stopped properly.

0 ToddMullanix over 5 years ago in reply to Santosh Jha

TI__Guru* 96960 points

QL,

BIOS_exit is not required if you want to restart the CPU. Calling BIOS_exit puts the kernel into a known state with interrupts disabled which might be useful in multi-core situations. Calling it or not calling it does not impact when the core is restarted since the full boot sequence is done again (e.g. cinit records are initialized, OS module startup is done, main is called...and lots of other little pieces!).

Todd

C2000™︎ microcontrollers

C2000 microcontrollers forum

CCS/TMS320F28388D: How to use BIOS_exit