Reconfiguration during execution

kpbr

Is it possible to reconfigure an MSP430 MCU during runtime? For example, I'd like to communicate to my MCU with my computer using the USCI. After I've sent a command via computer, I'd like the USCI to be configured for SPI. Is this possible?

Thanks in advance,

Jason

over 17 years ago

0 Brandon08 over 17 years ago

TI__Mastermind 24190 points

Jason,

There are two possibilities here:

This could be built into your code as a user interface that parses case statements (flash is not modified). You can develop an interface that will RX commands and then configure the USCI as desired based on those inputs. There are several ways to accomplish this, such as using GPIO port interrupts.
The second possibility I see is rewriting section of flash on the MSP430. If you know the section of memory that your USCI code resides it can certainly be rewritten. Alternatively you could reprogram the chip using JTAG or BSL. The below application reports will be helpful.

JTAG: http://focus.ti.com/mcu/docs/mcusupporttechdocsc.tsp?sectionId=96&tabId=1502&abstractName=slaa149d

BSL Features: http://focus.ti.com/mcu/docs/mcusupporttechdocsc.tsp?sectionId=96&tabId=1502&abstractName=slaa089d

Application of the BSL in software: http://focus.ti.com/mcu/docs/mcusupporttechdocsc.tsp?sectionId=96&tabId=1502&abstractName=slaa096d

The flashwrite codes at the following link illustrate how to rewrite portions of flash while your program is running: http://www.ti.com/lit/zip/slac123

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Reconfiguration during execution