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But Proteus simply cannot be trusted to work for every situation.
Here is a thread, where he has to upgrade to Proteus vs. 7.6
to make an i2c slave project work correctly:
http://www.ccsinfo.com ...

Thanks for your reply...

Master code:
#include <18f452.h>

#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, parity=N, xmi ...

Thanks for your concern, temtronic...

Of course i have LEDs and a LCD on my project but i didn't post those codes here to simplify my problem. I can see the results on both LEDs, LCD and proteus's ...

Hi all... I have a master (18F452) and two slave (18F877A) chips. When I use the i2c communication with one master and one slave individually, it works perfectly (thanks to forum). But when i try to u ...

After a week i finally make it....

In slave

.....
if((state >= 0x80)&&(state <= 0x87)) // Master is requesting data from slave
.....

I changed the code like this. And n ...

Thank you for your concern...

I wished you won't say something like that... I am trying the codes with different pics but i keep failing. I checked the hardware at least for 100 times. I guess i ha ...

Thanks for your concern...

I am using 16F877a and my clock is 20M. These are the only differences... I tested it in proteus but as i realized and as you said proteus is not reliable, so i tested in ...

Hello... I have the same master and slave codes shown above. But the master can read from the slave only for once. After the first turn it always reads "1". I guess i cannot trigger the inte ...

Thanks for your answer Wayne_;

I was doubting that can be the mistake too. You are right. The compiler just executes the directives and ignoring the C codes at the beginning.

...

Thanks for your concern...

If you don't use
streams, the last #use rs232() statement is the one that is in effect for
all code that comes after that line.
Because of "#define MODBUS_SERIA ...

Hello all... I am trying to use 2 UARTs on 18F6722. I can use INT_RDA and INT_RDA2 separately. But i cannot use them together. I define a modbus interrupt source and i want to change it in the runtime ...

Thanks for your concern...

Why should I use MODBUS_INT_RDA instead of MODBUS_INT_EXT ? I guess I didn't understand that part yet. Also when I directly write MODBUS_INT_RDA instead of MODBUS_INT_EXT ...

Hello everyone. I am new in this forum...
I searched the forum as much as i can for my problem but yet i cannot solve it. So if anyone helps me with this, i'll be gratefull...
I want to communicate ...