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How to set values to EEPROM outside the program

 
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stoyanoff



Joined: 20 Jul 2011
Posts: 375

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How to set values to EEPROM outside the program
PostPosted: Tue Mar 17, 2015 4:34 am     Reply with quote
Greetings! I have to load values in the controller EEPROM before program starts. I'm using MPLab and there is an EEPROM window where I can set these values. BUT I have to export it and load it everytime, which is very annoying. Is there a way to do this with program code, which to set the EEPROM on controller program?
The microcontroller will change EEPROM values so it can't be done in the program.
Thanks!
asmboy



Joined: 20 Nov 2007
Posts: 2128
Location: albany ny

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PostPosted: Tue Mar 17, 2015 8:01 am     Reply with quote
Quote:

I'm using MPLab


such a shame.
CCS provides a very nice way to do this as the user manual clearly explains.

start with this topic:
"Non-RAM Data Definitions"
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Mar 17, 2015 3:07 pm     Reply with quote
This program puts 0x55, 0xAA in the first two locations of data eeprom:
Code:

#include <18F4620.h>
#fuses INTRC_IO, NOWDT
#use delay(clock=4M)

#rom int8 getenv("EEPROM_ADDRESS") = {0x55, 0xAA}

//===================================
void main()
{
 
while(1);
}

Compile this program and then look at the EEprom window in MPLAB.
You will see those two values in the window.
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