Search found 22 matches

Because of a dumb mistake. I had tried TXSTA before without success but I suspect it was a syntactical screwup.

The following appears to work:

void sendChar(int c)
{
while( ...

I want a little snippet of code that will tell me if putc() will block before I call it (my application cannot afford to be hung up in a read or write).

I wrote one for the 18F452 in assembly:

...

That is true in the example, but not in the actual application, where the setjmp call is from the mainline and the longjmp call is from a few subroutines down from the mainline.

This is sure frust ...

Sigh. A friend reminds me that the code above should not work. longjmp must be at a call level below (or maybe the same) as the setjmp, not in another call tree.

I think it takes a complex program to fail. I believe I have created one, after analyzing the longjmp code, which fails to save the contents of the top of stack, only saving the stack pointer.

The ...

Yeah, I was afraid of that. I can't make a short program that fails! But the big one does. It is, of course, possible that the big one is clobbering the jump environment, but it is unlikely - I am not ...

You are correct, although it is not in the expected location - the alphabetical list of functions with descriptions. I missed it because I was using the printed version of the same manual. Thanks for ...

The example works fine in PCH/18F452, but in my application, where things are more complex and the longjmp takes place well down in a subroutine call hierarchy, it doesn't work right - it causes resta ...

I wanted to write my own version of putc in assembly language, and in fact did so. However, I only find two symbols in 18f452.h for the USART. Is there another include file with other symbols, or does ...

Oddly enough, in my tests, the series of printf's are shorter than the strcpy's. The following shows number of instruction words (in decimal):

printf strcpy
14 bit ...

As a new PIC programmer, I understand that the Harvard architecture imposes limitations in this area.

If I wanted to do something like the following normal C code, what is the best way with PCH/PCM ...

Thanks. It looks like it should do the job, then.

FYI, I got the interrupt routine working, so no help needed.

It helps to read the data register with a "*" in front of the address of the input data fsf Exclamation

I am running PCH Version 3.223.

I have no idea if longjmp/setjmp will work with PCM. If not, I've got a big problem. Unfortunately, I have no way to test it - all I have is a little test board that ...

I have it working okay on a 18F452.

It's in the middle of a bunch of code, so I'll just post snippets:

#include "setjmp.h"

jmp_buf set_jmp_env;

main() {
....
if(!setjmp(set_j ...