I2C LCD

[midali]

'************************************************* *******************************
IdleLoop:
I2CWRITE PORTC.1, PORTC.0,$78,[$00, $39,$14,$79]
pause 250
goto Idleloop
end[/CODE]

With this line is nothing on display. One time appeared undefinited characters, who move to right one by one.

Identically, in this case I run initially Vcc at 3,6V and after few seconds I changed to 5v.

[DaveC3]

In the above loop you are writing commands over and over again. I would not expect anything to display. I have to assume the supply to this display needs to be 5v (according to the paper you received from your friend). The connections should look like this with 5v

Also change the address to $7C again according to the data sheet i found.

I2C interface
It just only could write Data or Instruction to ST7032 by the IIC Interface.
It could not read Data or Instruction from ST7032 (except Acknowledge signal).
SCL: serial clock input
SDA: serial data input
Slaver address could only set to 0111110, no other slaver address could be set

I found this data sheet at http://www.farnell.com/datasheets/1669635.pdf

The pinouts are the same as your display

'****************************************************************
'*  Name    : UNTITLED.BAS                                      *
'*  Author  : Dave Cutliff                                      *
'*  Notice  : Copyright (c) 2014 Use at your own risk           *
'*          : All Rights Reserved                               *
'*  Date    : 12/29/2014                                        *
'*  Version : 1.0                                               *
'*  Notes   :                                                   *
'*          :                                                   *
'****************************************************************
 #CONFIG
        __CONFIG _CONFIG1, _FCMEN_OFF & _FOSC_INTOSC & _WDTE_OFF & _MCLRE_OFF & _CP_ON & _IESO_OFF & _BOREN_OFF & _PWRTE_OFF
        __CONFIG _CONFIG2, _PLLEN_OFF & _STVREN_OFF & _LVP_OFF
#ENDCONFIG
OSCCON = %01101010   'sets the internal oscillator to 4Mhz
      
TRISA  = %00000000  
TRISC  = %00000000  
ANSELA = %00000000  
ANSELC = %00000000  

OPTION_REG.7 = 0
SCL   VAR PORTC.0
SDA   var PORTC.1
Reset    var PORTC.2     'could tie reset pin to   vdd through 10K resistor


pause 100
HIGH Reset
'OPF1 = 0 
goto StartProgram
'********************************************************************************
'=============Initializing LCD==========
ST7036Init:


 



I2CWRITE PORTC.1, PORTC.0,$7C,[$00,$38]
PAUSE 10 
I2CWRITE PORTC.1, PORTC.0,$7C,[$00, $39,$14,$79,$50,$6C,$0C,$01,$06] ' 



Return
'********************************************************************************



startProgram:
gosub  ST7036Init
I2CWRITE PORTC.1, PORTC.0,$7C,[$40,$48,$65,$6c,$6c,$6f] ' Hello

IdleLoop:
      ' could blink an led here
goto Idleloop

give the above a try, that a look at the data sheet.

Good luck

Dave