18f45j11 write_eeprom problem

Linuxbuilders · Joined: 20 Mar 2010 Posts: 193 Location: Auckland NZ

any idea why this happens?

Line 41(14,15): Undefined identifier -- write_eeprom

thanks
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dilandau · Joined: 25 Aug 2010 Posts: 11

difficult to say without more info...

This can happen if a previous identifier is wrong,
or if there is a line without a ";" at the end,
or if there is a #ifdefine without its #endif somewhere in the code.

If it is a 16 bit chip it might happen that the register you are passing to the write_eeprom(16Bit address register, 16 bit value word); is not 16 bit

Linuxbuilders · Joined: 20 Mar 2010 Posts: 193 Location: Auckland NZ

thnx, the thing is that it works with 18f4520 so I am confused a bit now.

both are 8 bit by the way.

this is a line:

if (setValue < averageTempRead_int) {
write_eeprom (0x0A, 0x50);
delay_custom_ms(15);
fprintf(eth,"max internal temperature reached!...\n");
}

any one knows if I need to do any special fuses for it to work or is is a bug in compiler?

I have went to ccs wizard to do initial setup just to check if my manual is any good but no difference...

thank you
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dyeatman · Joined: 06 Sep 2003 Posts: 1923 Location: Norman, OK

Look at the data sheet. How much EEPROM does the 18F45J11 have? Maybe that could be the problem?
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bkamen · Posted: Thu Aug 26, 2010 8:42 am

Linuxbuilders · Joined: 20 Mar 2010 Posts: 193 Location: Auckland NZ

Stupid me! there is 0 ROM, I did buy wrong chip! Oh well life is hard for some people Smile

tHNX
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bkamen · Posted: Fri Aug 27, 2010 9:12 am

Linuxbuilders · Joined: 20 Mar 2010 Posts: 193 Location: Auckland NZ

thnx, I was actually thinking about something like that but the problem is that I need to do what Apple is doing with their laptops and iphone/ipod/ipad - they have humidity sensor in the device and when it gets too wet they mark it in the eeprom. Then when you take it for a service you may find out that they will say that there is no warranty because of too high humidity level. (water damage). I need to do this thing but with too high temperature. So I need hard memory. That is ok I will get different chip...I have just overlooked rom size...

Program memory is ok but I better do not touch it for other reasons.

thank you
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