Hello,
I'm a user of the 8-bit HCS08 microprocessors (in this project I'm using the HCS08DZ60A). Does anyone know of a technique where I can initialize a variable that's declared in EEPROM at compile time? In other words, I'd like to do something like the following:
#pragma DATA_SEG _EEPROM
// Variable initialized during compile.
volatile unsigned char eeprom_byte = 0xAB;
So that after programming the microprocessor, the variable eeprom_byte is initialized to value 0xAB.
What I'm trying to accomplish is a method for detecting a 'virgin load' of the firmware into the micro, and store the status in this byte.
Thanks much,
~Chris
Chris,
looks like that accidentally the same question has already been answered in the following thread: http://forums.freescale.com/freescale/board/message?board.id=8BITCOMM&thread.id=15738
Hope this helps you,
Pavel
Note that the key is that the segment used in the prm file must be using the READ_ONLY type,
not that the variable is const. I would actually make the variable const as the varible is not writable with a simple write, but as far as the tools are concerned they do not insist.
Everything in a READ_ONLY segment gets programmed at download time, everything in a READ_WRITE segment gets initialized during program startup (and everything in a NO_INIT or PAGED segment does not get initialized automatically at all).
Daniel