Search found 17 matches

Thanks once again PCM Programmer.

I see I need to read up on macros too!

Thanks PCM programmer
Use the make16() function. It's built-in to the CCS compiler.
I am using an ancient compiler v2.731. I'll have to upgrade some time.
I'll see how I go with Robert Scot's adv ...

Thanks Robert,

doing the <<8 certainly does get optimised.

Sorry for the simple question but I'm trying to insert a hi byte into an unsigned long without multiplying by 256 or left shifting 8 times.
I had the following code:

byte* BytePointer;
...

Amazing!

I already had the linear regulator on the PCB (being supplied by the lab supply).

My circuit diagram said I had a 10uF cap after the regulator but looking at the PCB I think it was 1uF ...

I have joined AN0 to Vss with just about the shortest piece of wire possible and cut the track that was going to that pin and the readings still have more jitter than I would like eg 0,0,0,2,0,0,0,0,0 ...

I tried it on an identical PCB (except for a different regulator chip) and the readings range from 0 to 8 so thats a lot better than 0 to 18.

Nevertheless I was under the impression that 10 bits ...

Thanks PCM Programmer.

I tried your program (not that there was anything really different) and I get the same spurious readings.

That points to bad PCB design or faulty chip. I find it very har ...

Thanks PCM Programmer, you wrote:

Quote:
enable_interrupts(GLOBAL);

Get rid of this line. You have no interrupt service routine.

Sorry, the program was a simplification of another p ...

Hi, I have a simple A/D conversion program written in pcm V2.731 (an oldie but a goodie)

I am just reading channel 1 and printing the result out the serial port.
With vref+ = VDD and Vref- = Vss
...

I found the problem. Somehow that write_eeprom must not have deal with the interupt control register properly. I just added:

disable_interrupts(global) after my write_eeprom and no more resets.
...

Code that doesn't work has stack height of 4.

I've been diverted from this job for a while. I'll try to narrow down the problem to see what's wrong before wasting any more of everyone's time.
...

Thanks for that reply PCM Programmer.

I had a look at the thread you pointed out. I am not using interrupts. I am using timer 0.

I am using CCS PCM version 2.731. It does save the INTCON and ...

I have a PIC16LF84 running on a 3V battery and a 32.768kHz crystal

I have written some code which writes to 8 places in eeprom using the CCS pic c compiler write_eeprom() function. I have no watc ...

I said I changed the baud rate to 110 from 300 and it now works.

I had a look at the machine code produced by the compiler for each baud rate, for getchar() and it's identical. How can that be? I ...