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scnarine
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Joined: 17/06/2011
Location: United States
Posts: 29

Posted: 07:36pm 15 Mar 2013

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I have built Gizmo's PICAXE Charge Controller.
However, I desperately need some help since the PICAXE-28X is obsolete. I do have one PICAXE-28X1 and one PICAXE-28X2.
Whenever I programmed PICAXE-28X1 with version_1.2 code the LCD would display okay,

but when I used the 2010c version code it does not work.

The LCD I am using is LCD Display 20 x 2 Blue Character with Backlight
from taydaelectronics.com
I then try the built-in conversion tool from the program editor on the PICAXE-28X2 and the same result. first code works but the second one fails.

Any help is highly appreciated....

Edited by scnarine 2013-03-19

scnarine
Newbie

Joined: 17/06/2011
Location: United States
Posts: 29

Posted: 05:12pm 20 Mar 2013

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Can anyone please help me find a PICAXE-28X?
I have been trying to get this thing to word with the PICAXE-28Xx1 chip but only the first version works. I guess I need a PICAXE-28X chip for the version 2 to work.

Please help me!

MicroBlocks

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Joined: 12/05/2012
Location: Thailand
Posts: 2209

Posted: 09:37pm 20 Mar 2013

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You might try to invert the serial signals or using a different divider.
You can do that by using a baudrate constant that starts with a T or if you already used that switch it to one that starts with a N.
Also be aware that when using a faster clockrate you also need another baudrate constant.
they end with _4, _8 or _16.
I think a newer chip will run faster, with a higher clockrate.
As an example if you used T1200_4 before it might work when you change it to T1200_8 or T1200_16.

If you have a scope or logic analyzer you could look at the signal and compare it to the signals from the other chip. As they are serial they should look the same.

Microblocks. Build with logic.

jman

Guru

Joined: 12/06/2011
Location: New Zealand
Posts: 711

Posted: 08:24am 21 Mar 2013

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Hi
Does this help
http://www.sicom.co.nz/picaxe-28a-microcontroller-16f872-xid p77957.html

John

James_From_Canb

Senior Member

Joined: 19/06/2011
Location: Australia
Posts: 265

Posted: 01:22pm 21 Mar 2013

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Or, if you don't mind paying around $27 for chip and postage, ebay link

I'd confirm it's an actual 28x first though.

James

My mind is aglow with whirling, transient nodes of thought careening through a cosmic vapor of invention.

Hedley Lamarr, Blazing Saddles (1974)

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