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Forum Index : Electronics : Picaxe 28X1 to LCD display connection
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Norbert Guérard Newbie  Joined: 01/01/2008 Location: BelgiumPosts: 2 |
Hello, Based on the diagram "Gizmo's Windmill Charge Controller Ver.1.2 24/10/2005", I tried to make one but I have some problem with the LCD display. Could you please tell me if the following interface connections between the picaxe 28X1 and the LCD display (LED008 from www.tech-supplies.co.uk) are ok or not? Picaxe 28X1---connected through---to LCD(LED008)display- pin n°-------------------------------pin n°------------- ----------------------0V-------------1 Vss-------------- ----------------------+5V------------2 Vdd-------------- ---------contrast adjust 10k pot-----3 V0--------------- 23(out2)--------------330R-----------4 RS--------------- ----------------------0V-------------5 R/W-------------- 24(out3)--------------330R-----------6 SE--------------- -----------------------0V------------7 DB0-------------- -----------------------0V------------8 DB1-------------- -----------------------0V------------9 DB2-------------- -----------------------0V------------10 DB3------------- 25(out4)--------------330R-----------11 DB4------------- 26(out5)--------------330R-----------12 DB5------------- 27(out6)--------------330R-----------13 DB6------------- 28(out7)--------------330R-----------14 DB7------------- Reason for my doubt: in the picaxe manual 3.pdf page 35 "Connecting the LCD option 3", LCD pin 14 is indicated DB4 while on the LCD (LED008) display, pin 14 is marked DB7 Which is correct? b) second problem When the file "picaxe_code.txt is opened with the "Picaxe Programing Editor Version 5.1.5" and the Picaxe Syntax checked, the following Compile Error appear: Error: Syntax error in this line (line 11 : SYMBOL get = b11) Should the SYMBOL "get" be changed to solve the problem? Kind regards and happy new year. Norbert Norbert |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5019 |
Hi Norbert As far as I can the the wiring diagram on my site is correct. I dont have the latest 3.pdf manual from Picaxe, I'll download it tonight to have a look. But the circuit diagram has been used by a couple of visitors and has worked OK. The "Get" may now be a reserved keyword with the latest PicAxe compiler. When I wrote the program Get was a valid variable name, but this may have changed since then. Renaming it should fix your problem, dont forget to change it where ever you see "Get". Hope that helps Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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sPuDd Senior Member  Joined: 10/07/2007 Location: AustraliaPosts: 251 |
Norbert, The PICAXE forum is the best place for this kind of info: PICAXE Forum UK sPuDd.. It should work ...in theory |
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| Norbert Guérard Newbie Joined: 01/01/2008 Location: BelgiumPosts: 2 |
Thank you for your help The problem is solved simply by adjusting the contrast potentiometer of the LCD display to a lower voltage. I had also to do a reset of the picaxe. Best regards, Norbert Norbert |
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