MSP430F6775A: ISR RAM vectors

Peter Peter

Part Number: MSP430F6775A

Tool/software:

Hi,

I would like to ask what would be the addresses of the interrupt vectors after SYSRIVECT bit will be set. I cannot find those addresses in the datasheet. Also I can delete the .text:_isr : {} > FLASH /* ISR CODE SPACE */ section from the .cmd. I mean it wont be used during code generation or?

8 months ago

0 David Schultz 8 months ago

Guru 25105 points

At 1.3.6.1 of the guide: "Setting the SYSRIVECT bit in SYSCTL causes the interrupt vectors to be remapped to the top of RAM."

0 Peter Peter 8 months ago in reply to David Schultz

Intellectual 400 points

But at what address will be what peripheral? And top of the ram is first address from datasheet?

0 David Schultz 8 months ago in reply to Peter Peter

Guru 25105 points

They will be in the same order as when located in flash with the reset vector being at the highest address.

Note that the linker puts the stack here so you must alter the linker script before attempting to use the RAM vectors.

0 Sal Ye 8 months ago in reply to Peter Peter

TI__Mastermind 26555 points

Hi Peter,

Normally it looks like copy the FLASH vector table to RAM vector table. As you know, RAM will lose data if power is lost, so it necessary to keep the constant one in FLASH for reload the vector table.

B.R.

Sal

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MSP430F6775A: ISR RAM vectors