Prop demo program for the parallax 4X20 serial LCD??

mikediv · 2009-04-08 22:53

Guys I know I had seen this somewhere but wasn't there a prop demo program for the 4X20 serial LCD display I found the driver in the object exchange but I remember seeing a post at least I thought I did someone else had purchsed one and was having some problems and others posted some code?
Thanks

Oldbitcollector (Jeff) · 2009-04-08 23:00

Here's some materials that I'm working with for the book.
Look at CustomChars and Hello World.

(Rename to .zip)

OBC

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New to the Propeller?

Visit the: The Propeller Pages @ Warranty Void.

mikediv · 2009-04-08 23:22

Thank you Old Bit I am trying ot get it to work with simple serial and debug lcd but no luck even wih a pull/down/up on pin 0 or 1 hope my lcd is not bad

Old Bit what kind of file is this??? I can not seem to open it or read it

Oldbitcollector (Jeff) · 2009-04-09 00:30

It's a zip file. Rename with .zip extension. Sorry I've been thrown out of the
MIME club again. [noparse]:)[/noparse]

OBC

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
New to the Propeller?

Visit the: The Propeller Pages @ Warranty Void.

mikediv · 2009-04-09 01:18

Got it, it was bad when I first downloaded. Old Bit I have been using something similair to this thank you. I just can not get my propsticks to work right with it, it works fine with the BS2's so at least the LCD is good.
From what I can tell looking at the code I should be using P1 on the prop I have it going through a 1K resistor to the input of th LCD but I have also added a 4.7 pull up I have even tried a Pulling the line low as well.
I am not sure why it is not working

Same-Pin (Bi-Directional) True Mode Same-Pin (Bi-Directional) Inverted Mode
Ex: serial.init(0, 0, 9600) Ex: serial.init(0, 0, -9600)
 ┌────────────┐ ┌──────────┐
│ │Propeller P0├─────┳─────┤I/O Device│
 4.7 kΩ └────────────┘ │ └──────────┘
┌────────────┐ │ ┌──────────┐  4.7 kΩ
│Propeller P0├─────┻─────┤I/O Device│ │
└────────────┘ └──────────┘ 
I am looking at P1 on the prop when I load the program with my osciliscope but its not doing anything
This Serial LC shuld be the same basic thing as the 2X16?? right
Thanks for the help

SRLM · 2009-04-09 01:25

Try using the FullDuplexSerialPlus object. This code should work provided you use pin 15 and change the switches on the LCD to 19200 baud.

CON

  'These are clock constants
  _xinfreq = 5_000_000                      
  _clkmode = xtal1 | pll16x

  pinLCD = 15

OBJ
  LCD    : "FullDuplexSerialPlus"
 

PUB StartLCD

  LCD.start(24, pinLCD, 0, 19200)   'NOTE THE 24 as recieve Pin UNTESTED AND UNNEEDED?

  LCD.tx(12) 'clear

  waitcnt((clkfreq/1000)*7+cnt)

  LCD.tx(17) 'backlight
  LCD.tx(22) 'No cursor
  LCD.str(string("Hello World!"))

  repeat

mikediv · 2009-04-09 16:33

Hey SRLM thank you very much thanks to all you guys I have it working a bit" no pun intended" but when I look at the output pin on my scope its just a very dirty signal I have so many prop chips I have lost count but I started the whole thing with 2 propsticks not counting my hydra and to be honest whenever I design with them just about always they never fail to do some strange things I wonder if I have some wounded propsticks, but anyway thanks again gus.

Prop demo program for the parallax 4X20 serial LCD??

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