TMS320F28027: F2802X_FLASH_KERNEL example code

Howard Zou

Genius 12365 points

Part Number: TMS320F28027
Other Parts Discussed in Thread: CONTROLSUITE

Hi,

in the example code in controlsuite.

code_start is the first code that is executed after exiting the boot ROM code.

in code_start it will jump to InitBoot, which will then jump to main.

I wonder why doesn't it jump to main directly?

All InitBoot code has already been executed in boot ROM code before code_start, why the flash_kernel code write it again?

over 5 years ago

0 Sal Pezzino over 5 years ago

TI__Mastermind 32995 points

Hi Howard,

In this case, it could probably branch directly without going to InitBoot. If all init boot is doing is branching to main or __c_int00 then it isn't required.

There is some C initialization code which is generated by the compiler that usually needs to be executed first. This is in __c_int00.

Hope this helps.
sal

0 Kevin Allen18 over 5 years ago

TI__Mastermind 38295 points

Hi Howard,

I am going to have someone with more expertise respond to you.

What ControlSuite version are you currently using for this example program? Some comments on the InitBoot function below if you hadn't come across them already:

;-----------------------------------------------
; _InitBoot
;-----------------------------------------------
;-----------------------------------------------
; This function performs the initial boot routine
; for the boot ROM.
;
; This module performs the following actions:
;
;     1) Initalizes the stack pointer
;     2) Sets the device for C28x operating mode
;     3) Calls the main boot functions
;     4) Calls an exit routine
;-----------------------------------------------

Best,

Kevin

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TMS320F28027: F2802X_FLASH_KERNEL example code