Lpc2000

ebarker123 wrote:
> Here is the scenario.
> 
> I have an MCB2138 eval board. I have a menu talking on a serial port.
> 
> Using the menu, I can set and print a variable called 'mytemp'.
> 
> I set the value to say, 456, and print that out.
> 
> I press reset and the value is changed to 0. 
> Where/How is this variable getting changed. My application requires
> that we be able to press reset, and the SRAM contents not change.
> 
> Any clues ?

The startup code zeros variables in the .data section.

If you want the startup code to leave your variable alone,
create a new section for it, and place it in that section.

This question has been asked before, so take a look in the
archives.

Another option is both reset and power-down preservation,
by writing the variable to flash when it changes.

Look in the archives for threads on using the flash as EEPROM,
there are a few discussions, and I believe there are examples
in the files area.

Dave