Resetting the MSP430F149

Jeffrey Westgeest

Intellectual 615 points

HI,

At the moment I am debugging my software download and everything is working fine except the reboot.

What I do is WDTCTL = 0xFF00;

But for some reason the software does not come up.

When I remove the power and turn it back on again it runs fine.

I check the flash written with the Hex file and they are the same.

Any suggestion to perform a complete software reboot? Maybe write to an illegal segment or something?

over 12 years ago

0 Leo Hendrawan over 12 years ago

TI__Guru 56650 points

Hi Jeffrey,

maybe this can help you:

http://processors.wiki.ti.com/index.php/MSP430_FAQ#Is_it_possible_to_generate_software_reset.3F

0 Jens-Michael Gross over 12 years ago in reply to Leo Hendrawan

Guru 227245 points

Leo Hendrawan said:
maybe this can help you:

Likely not. The proposed WDT setting as well as the power management module, are 5x family specific and not available on the 149.

However, writing 0xff00 (or anything else that doesn't have the proper WDT password) should trigger a password violation reset.

So what do you mean with 'the software doesn't come up'?

One thing to note: a password violation reset won't reset the timer registers. If you have them programmed for interrupts, they will fire as soon as you set GIE - even if your software doesn't expect it at this point (because it configures the timers later).

0 D.A.R.E!! Instruments D.A.R.E!! Instruments over 12 years ago in reply to Jens-Michael Gross

Prodigy 20 points

Dear All,

Thank you for your reply.

The 0xFF does work, there was a hardware failure that caused the cpu not to restart again.

(It took us a while to figure this out)

Best regards,

Jeffrey

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

Resetting the MSP430F149