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getenv("DATA_EEPROM") on 16F877A on PicDem2plus

 
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custom_elect



Joined: 15 Dec 2007
Posts: 13

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getenv("DATA_EEPROM") on 16F877A on PicDem2plus
PostPosted: Sat Dec 15, 2007 11:30 am     Reply with quote
This function is returning 0 but there are supposed to be 256 bytes onboard this device.

Any Ideas?

Also how do you tell the difference between a 0 returned because getenv doesnt recognise the keyword, and 0 bytes?

Input gratefully received.
RB
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Dec 15, 2007 12:32 pm     Reply with quote
I compiled the test program shown below with vs. 4.064 and ran it
in the MPLAB simulator. It displayed this result:
Quote:
256

Code:

#include <16F877A.H>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

//===================================
void main()
{
int16 result;

result = getenv("DATA_EEPROM");

printf("%lu\n", result);

while(1);
}

 
custom_elect



Joined: 15 Dec 2007
Posts: 13

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PostPosted: Sat Dec 15, 2007 1:24 pm     Reply with quote
Many Thanks

I was using %d and only seeing 0 as the LSByte - Doh!
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