Other Parts Discussed in Thread: TMS320C6455, SYSBIOS
Good afternoon!
I create a project using the SYS / BIOS. It is required that the program can be programmed into flash memory and boot from it.
Tell me, please, what code I need to write in *.cmd-file and *.asm-file to make things work?
Perhaps there is a ready example?
TMS320C6455
The documentation can not understand.
Thanks for the answer.
I have read the documentation, but the program still does not work. What am I doing wrong?
I have created a Custom Platform, with parameters (see. Figure):
I have *.cmd-file:
MEMORY
{
BOOTIPRAM : origin = 0x800000, len=0x3f0
}
SECTIONS
{
.boot_load :> BOOTIPRAM
.text: ALIGN(4096) > SDRAM
.tables: ALIGN(128) > SDRAM
.data: ALIGN(128) > SDRAM
.sysmem: ALIGN(128) > SDRAM
.cinit: ALIGN(128) > SDRAM
.pinit: ALIGN(128) > SDRAM
.const: ALIGN(4096) > SDRAM
.cio: ALIGN(128) > SDRAM
.far: ALIGN(4096) > SDRAM
}
Also i have assembler-file:
A;
; ======== boot_c6455.s62 ========
;
.title "Flash bootup utility"
.option D,T
.length 102
.width 140
.include boot_c6455.h62
copyTable .equ 0xb0000400
.sect "bootload"
.global _boot
_boot:
mvkl copyTable, a3 ; load table pointer
mvkh copyTable, a3
ldw *a3++, b1 ; Load entry point
copy_section_top:
ldw *a3++, b0 ; byte count
ldw *a3++, a4 ; ram start address
nop 3
[!b0] b copy_done ; have we copied all sections?
nop 5
copy_loop:
ldb *a3++,b5
sub b0,1,b0 ; decrement counter
[ b0] b copy_loop ; setup branch if not done
[!b0] b copy_section_top
zero a1
[!b0] and 3,a3,a1
stb b5,*a4++
[!b0] and -4,a3,a5 ; round address up to next multiple of 4
[ a1] add 4,a5,a3 ; round address up to next multiple of 4
;****************************************************************************
; jump to entry point
;****************************************************************************
copy_done:
b .S2 b1
nop 5
.word 0
.word 0
.word 0
What should I do more?