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Internal EEPROM bigger than 256 byte

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gjs_rsdi

Joined: 06 Feb 2006
Posts: 468
Location: Bali

Internal EEPROM bigger than 256 byte

Posted: Sat Oct 05, 2019 8:25 pm

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Hi

I would like to read/write to an internal EEPROM (PIC18F26K22) that have 1024 bytes.
For 256 bytes I used:

Code:

eepromreaddata0=read_eeprom(eepromaddress);
write_eeprom(eepromaddress,eepromwritedata0);

and it is working
It is correct to use for 1024 bytes:

Code:

eepromaddress=make16(eepromaddresshigh,eepromaddresslow);
eepromreaddata0=read_eeprom(eepromaddress);

I am sending eepromaddresshigh (0 to 3) and eepromaddresslow (0 to 255) from the PC to the PIC.
I would like to know if the above correct before going forward with this part of the project.

Best wishes
Joe

Ttelmah

Joined: 11 Mar 2010
Posts: 19550


Posted: Sun Oct 06, 2019 1:34 am

Yes, but remember that the variable 'eepromaddress', is going to need to be declared as a 16bit value, not a simple 8bit 'int'.

gjs_rsdi

Joined: 06 Feb 2006
Posts: 468
Location: Bali


Posted: Mon Oct 07, 2019 3:35 pm

Thank you very much Ttelmah I can go forward with the project. Best wishes Joe

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