Symbol not previously defined

**richard** · - 6th February 2015, 12:00

hi malcom
a quick look says

FOR pid_Channel = 0 TO 3 ; Set # of bits in resolution
GOSUB SelectSensor ; for all sensors
GIE = 0 ; disable interrupts before 1-wire
@ DS1820_Resolution 12
GIE = 1 ; enable interrupts after 1-wire
NEXT pid_Channel

but you have

Code:

PID_Channels CON 1

its not going to fly
its expecting 3 more sensors

**pedja089** · - 6th February 2015, 22:40

Originally Posted by Scampy

That's one of the issues with including files, commenting them out can cause it to fail as it can't find variables etc that are declared in said include file -

That is why I said that you uncomment include first. I just did that, and with all variable definition, and code down to label init: compiles OK.
I need 2min to locate first error...
DS1820_Select macro Regin, Bitin <macro from include
DS1820_Select _TempSensor1 <from your main code subroutine SelectSensor
You didn't put Bitin...

**Scampy** · - 31st October 2015, 11:48

Guys,

I've come back to this project again and I'm getting the same error in post #4. Since February I re-hashed the 4 channel version to include 4 AM2302 sensors and a 128 x 64 GLCD. The GLCD used a BV4615 serial controller which made sending data to the GLCD as simple as using a normal LCD display. Anyway this code was used as the basis to convert it to a single channel version. It simply changed the values in array variables and removed references to channels 2,3,and 4 throughout the code (and yes I've remove dthe for next loops as Henrik commented on above).

I've zipped up all the files and attached them to this post. From what I can see the reference to the BITIN and REGIN are part of the 18B20 include file, but I can't remove that from the include files as it's a key element of the code. I must be missing something from the main code that's either been commented out or needs changing, but is not obvious...at least to me. I would welcome someone more experienced going over the code to check for me. The code is messy as I've removed / commented out all the serial GLCD lines. I'm not worried that the code won't display anything on an LCD yet - I'll tidy that up later - I just want it to compile !