How to set "reset vector" in fixed address

Dunk Wu

Prodigy 210 points

Other Parts Discussed in Thread: MSP430F5510

Hello sir,

I using CCS V6 to develop for MSP430F5510.

I need reset vector in fixed address(0x9000).

How to set CCS complier to fixed address for reset vector?

lnk_msp430f5510.cmd

/****************************************************************************/
/* SPECIFY THE SECTIONS ALLOCATION INTO MEMORY */
/****************************************************************************/

SECTIONS
{

.....
SYSNMI : { * ( .int62 ) } > INT62 type = VECT_INIT
.reset : {} > RESET /* MSP430 RESET VECTOR */
}

Thanks.

over 9 years ago

0 old_cow_yellow over 9 years ago

Guru 58965 points

Dunk Wu said:
How to set CCS complier to fixed address for reset vector?

My question is, why do you want to do that?

The power-up reset vector for MSP430F5510 is at 0x0FFFE. Nothing short of re-designing the chip can change that.

0 Clemens Ladisch over 9 years ago

Guru 303820 points

This implies that the start-up code begins at address 0x9000. Did you already accomplish this, or do you want to know how to do this?
(And why do you need a fixed address for this?)

0 Dunk Wu over 9 years ago in reply to Clemens Ladisch

Prodigy 210 points

I want to know how to do this.
Because i want to the device include two different code.
The device has independent bootloader, it can use "asm(" MOV #address,PC")" to select internal two different start-up address.

0 Dunk Wu over 9 years ago in reply to old_cow_yellow

Prodigy 210 points

Sorry, i mean that the start-up code begins at address 0x9000.

0 old_cow_yellow over 9 years ago in reply to Dunk Wu

Guru 58965 points

Actually that was a trick question.

I do have a reason to fool the compiler/linker to generate a "reset vector" at some memory location, vwxyz, other than 0x0FFFE with the content pointing to the start up code of the compiled program.

I will make the real "reset vector" at 0x0FFFE to point to some extra code that decides whether to load new code or to run the existing code. If the later, it will do a "MOV.W &vwxyz,PC"

I do not know how to do the above with CCS.

0 Clemens Ladisch over 9 years ago in reply to Dunk Wu

Guru 303820 points

This is typcially done by defininig a section at that address, and putting the startup code into that section. What startup code are you using? Do you know how to modify it?

0 Dietmar Walther over 9 years ago in reply to Clemens Ladisch

TI__Genius 14165 points

All,

the following link will guide you how to fix code/variables to certain memory addresses:

processors.wiki.ti.com/.../Placing_Variables_in_Specific_Memory_Location_-_MSP430

Best regards,
Dietmar

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How to set "reset vector" in fixed address