Problems with ReadAD on 18F4431 and 16F628A

[David Russell]

Hi

I am using the simple program as shown below and I have tried this with the 18F4431 and 16F628A microcontrollers and I am getting the error :- a-d.h (1786): Error: Incorrect parameters in Set, expected: Set variable.bit status

PROGRAM

#Chip 18F4431
#OPTION Explicit

Dim ADCIN as Byte

Do Forever
ADCIN = ReadAD(AN0)
Wait 1 s
Loop

After the error the SynWrite program crashes and you have to Control Alt DEL to close it down and then restart it,

I hope this is a simple problem to solve,

Thanks

[stan cartwright]

Change to #chip 328p.16 and it asm. Chip not supported??

edit -it does crash the gcb ide, why gcb crashes?

[GCBASIC]

I am guessing this is an old installation.

The ADC library has been updated to resolve this issue. https://sourceforge.net/projects/gcbasic/files/Release%20Candidates/Patches/gcb%40syn/GreatCowBASIC/include/lowlevel/a-d.h/download This ADC library was corrected to specifically address your issue. Please download and replace the file in your GreatCowBASIC\include\lowlevel folder.

Please let me know if this resolves.

[David Russell]

Hi

The installation was a bout a week old but I did just reinstall now using the latest version on the site and this still failed with the 18F4431 CPU,

I have now updated the A-D.H file as recommended and this now compiles fine on the 18F3341 but for the 16F628A it still gives out the same error code and it crashes SynWrite again, I get Not Responding and have to Ctrl-Alt-Del and Close Program to get out of this,

I can continue my experiments now on the 18F4431 IC and thanks for the fast response to this problem, this does look like its going to be a fantastic system for experimenting with PIC hardware,

Thanks
Dave

[Anobium]

16F628A has no ADCs so the error is sort of correct.

Adding the following line to a-d.h at about line 160 will help you.

#option REQUIRED PIC ChipADC "a-d.h (0) This chip does not support ADC operations"

This will force a check that ADC is supported, if not, issue an error message.

[Anobium]

Re the SynWrite issue.. move to the new IDE.

[David Russell]

Thanks for that update, I will update the A-D file now,

Where can I locate the new IDE download ?,

Thanks
Dave

[Anobium]

https://sourceforge.net/p/gcbasic/discussion/596084/thread/2f0beef127/?page=1&limit=250#e8e9

You may have to put back the a-d.h as this is library update may not be in GCSTudio yet, and, press <f4> for the quick list of the IDE commands. </f4>

[David Russell]

Thanks that download works fine, I have to admit I initially prefer the SynWrite layout and ease of use with the action buttons for things like produce hex and download to target etc but this new version of IDE does not crash on an error but I hope not to be getting many errors now, I got the PIC 18F4431 working OK today and the ADC library was working fine during the first tests I have done so things are looking up for GCB and thanks for your help so far on this

[stan cartwright]

Hi David, I found gcstudio grows on you. Familiarity with SynWrite I agree.
I have things I don't like about gcstudio and the developer is open to any feed back.
What do you like and dislike using gcstudio sir?
What does my head is it's not consistant ie 1 session seems different to another and I think I'm looseing the plot but I never thought like this using gcb@syn. Gcstudio seems to have a mind of it's own sometimes... imho

and F4 key is the gcb stuff. very important.

[David Russell]

Hi Stan

YES its just I have been using the BasicMicroUK Nano Basic compiler for years and that interface studio software is much like SynWrite in format and so when using the new GCstudio it feels more like the old Wordstar 1.0 interface and juse does not inspire confidence like SynWrite and another problem was the old PC in my LAB at work is so old it running Windows Vista and the CGStudio will not even install on this where as the SynWrite will run on this and my home laptop so i think a visit to PCWorld at the weekend is in order, then I will have Windows 10 or 11 as well as GCStudio to get used to LOL, I am sure it will be a fun weekend, I have today ordered in some of the PIC16F18313 IC's and I am going to go through the LockDown You Tube series on GCB and just get used to the functions and then I will have a little more confidence with the PIC family and the compiler but so far I am loving it,

Dave

[Angel Mier]

the ADC library is coming on the next update along with action buttons. expect it in a few days. it will update automatically for you.

Angel