Retain a variable in RAM after soft reset in TIVA Launchpad

Harry

I am using the latest CCS and using for the Tiva123GH6M Launchpad. I wish to know if there is a method we can use to retain variable after a soft reset of the MCU.

I use the following line to RESET the MCU.

HWREG(NVIC_APINT) = NVIC_APINT_VECTKEY | NVIC_APINT_SYSRESETREQ

Thank you.

over 10 years ago

0 cb1_mobile over 10 years ago

Guru 117855 points

Might this be well handled w/in your compiler/debugger? Usually you may select certain memory areas for "special treatment." ("no-init" or a similar keyword may warrant your search...)

0 Amit Ashara over 10 years ago in reply to cb1_mobile

TI__Guru**** 244400 points

Hello Harry,

Why a variable in SRAM when EEPROM can be used to store and retrieve it across power cycles.

Regards
Amit

0 cb1 over 10 years ago in reply to Amit Ashara

Guru 47900 points

Hi Amit,

Re: SRAM over EEProm:

Quickly - one may list: faster write execution time, freedom from EEProm initialization, and no fear of dreaded, "wear out."

0 Amit Ashara over 10 years ago in reply to cb1

TI__Guru**** 244400 points

Hello cb1,

Yes that is true, just making sure that the post has the alternatives listed.

Regards
Amit

0 Harry over 10 years ago in reply to Amit Ashara

Expert 2920 points

Dear Amith,

I will go with storing my variable in the EEPROM. Its alright. The only thing that worried me was the time to get the EEPROM to work according to my need but I believe the Tivaware makes the same a little easy.

I believe there are some other methods like not initializing the variable in the init functions so that previous values remain but I feel thats a too risky.

Thank you for your help cb1 and Amith!

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Retain a variable in RAM after soft reset in TIVA Launchpad