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PCM programmer,

WONDERFUL! You got me on the right track; I now have a perfectly working timer! My code ended up like this:

#bit I2CEN = 0x14.5 // SSPEN bit to enable/disable hardware I2C m ...

I figured it out!
I am suffering from a locked up I2C bus. At some point in time a data transfer was interrupted, or an incorrect sequence run that left the bus in an unknown state.
When not active ...

Ttelmah,

I indeed do not get that one (does not seem very clear in the documentation), but I will go with it. Also thanks for fixing my code for the lacking NACK on my last read, very simple, THANK ...

Thanks everyone for the responses!

Ttelmah:
In order to determine where my code hangs, I insert a line that turns on a LED on my project. If it lights, I know the code reached that point. If it do ...

Thanks, PCM programmer,
Using the I2C1 did solve the error issue. However, I am still locking up on the second line; being the first write command. My read code is:

void I2C_RTC_Read(int8 a2, ...

The DS3231 is a very flexible part; the following is from the DS3231 manual:

ELECTRICAL CHARACTERISTICS
(VCC = 2.3V to 5.5V, VCC = Active Supply

The part will work fine on 3.3V as well as 5V, ...

in MAIN.h :

#include <16F877A.h>
#FUSES NOBROWNOUT,LVP,NOWDT,HS,NOCPD,NOWRT,NOPROTECT,NOPUT

#use delay (clock=4000000)
#use FIXED_IO( B_outputs=PIN_B5,PIN_B4,PIN_B3,PIN_B2,PI ...

Hello....
I am working on a timer project, using a PIC16F877A, and a LCD readout. I am using an I2C bus RTC (DS3231). I am using the demo (V.5.074d) compiler.
The LCD is working, and I can write to ...