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The big potential problem I see is the use of a bit field within a structure, within the union.

Have you tried looking at the generated ASM for the various types of access methods?

Does it look ...

I think more importantly you should only be reading the timer value once, and work from the stored value in your timer test routine.

The way I am reading the code in the source as published is you ...

I couldn't get any result from your link. Could you write a sample about it?

Huh?

There is an example right there in the link.
As suggested by others, learn the language and you will see how it ...

My favorite method is to use a structure/union approach.

You can use the inbuilt macro functions to do it, but I simply like the elegance of reading or writing a value directly from/to where it is ...

I responded to another poster with a similar question a while back.

After playing around with various methods in the compiler, I found if you define a union, holding a int16 and a structure with tw ...

simplest method is to delimit your strings by converting all control characters (< 0x20) to nulls.

Then simply search for "OK" and forget about CR LF etc.

Ray

I have experienced problems with occasional corrupt character, as described here http://www.ccsinfo.com/forum/viewtopic.php?t=35733.

But your corruption really looks like the bit rate is not being ...

Is this a simple human interactive test program?

The reason I ask is you are responding with 8 characters for a single received character.

You are certain to have a rx overrun since both ports a ...

Also, fgets will return once it sees the \r. You won't get to see the \n.
It is possible the \r is also replaces with a \0, and you wont even see the \r

Ray

Your parameter order is backwards in strcpy!

Ray

Hello Jacob.

I am somewhat confused. You have ERRORS in the code you have pasted, and you say it works OK???

HOWEVER, you have totally refactored the way you talk to the modem.

You are now us ...

If you chat with the modem using the PC, I presume you get the correct responses?

Next thing I'd be trying is to add the ERRORS directive to your #use RS232, especially since you are not reading re ...

No,

\r = CR
\n = LF

r = Return
n = NewLine

These hark back from the days when a carriage Return did exactly that, it returned the carriage holding the type keys on teleprinters to the left ...

Doesn't help with your problem, but why do you use

fprintf(pc,"at+cmgf=1%c", 0xD);

When
fprintf(pc,"at+cmgf=1\r");

is far easier to read, and le ...

To increase efficiency, forget about performing bit shifts more than 8 bits, especially if you don't need to preserve the carrys.

The PIC can only ever read/write 8 bit values.
16 bit values are ...