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Character LCDs / Re: NHD-C0216CiZ-FSW-FBW-3V3 not working
« on: October 21, 2016, 03:09:51 PM »
Hello,
I have another example code for this display here:
I was able to get this to work with an Arduino Mega with a 3.3V regulator.
The Voltage should not be dropping to 2.1V when you plug in the display.
Has this only occurred with one unit or multiple units?
Can you also confirm that you are going right to left for the pin numbers?
I have another example code for this display here:
I was able to get this to work with an Arduino Mega with a 3.3V regulator.
The Voltage should not be dropping to 2.1V when you plug in the display.
Has this only occurred with one unit or multiple units?
Can you also confirm that you are going right to left for the pin numbers?
Code: [Select]
/*****************************************************/
/*
C0216CiZ.c
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/*****************************************************/
/*****************************************************/
unsigned char text1[]={"NEWHAVEN Display"};
unsigned char text2[]={"2x16 LCD Module "};
unsigned char text3[]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f};
unsigned char text4[]={0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f};
/*****************************************************/
#define SDO 22 //Serial data
#define SCLK 23 //Serial clock
#define RESET 24 //RESETET
/*****************************************************/
const char Slave = 0x7C;
const char Comsend = 0x00;
const char Datasend = 0x40;
const char Line2 = 0xC0;
/*****************************************************/
/*****************************************************/
void I2C_out(unsigned char j) //I2C Output
{
int n;
unsigned char d;
d=j;
for(n=0;n<8;n++){
if((d&0x80)==0x80)
digitalWrite(SDO, HIGH);
else
digitalWrite(SDO, LOW);
d=(d<<1);
digitalWrite(SCLK, LOW);
digitalWrite(SCLK, HIGH);
digitalWrite(SCLK, LOW);
}
digitalWrite(SCLK, HIGH);
while(SDO==HIGH){
digitalWrite(SCLK, LOW);
digitalWrite(SCLK, HIGH);
}
digitalWrite(SCLK, LOW);
}
/*****************************************************/
void I2C_Start()
{
digitalWrite(SCLK, HIGH);
digitalWrite(SDO, HIGH);
digitalWrite(SDO, LOW);
digitalWrite(SCLK, LOW);
}
/*****************************************************/
void I2C_Stop()
{
digitalWrite(SDO, LOW);
digitalWrite(SCLK, LOW);
digitalWrite(SCLK, HIGH);
digitalWrite(SCLK, HIGH);
}
/*****************************************************/
void Show(unsigned char *text)
{
int n, d;
d=0x00;
I2C_Start();
I2C_out(Slave);
I2C_out(Datasend);
for(n=0;n<16;n++){
I2C_out(*text);
++text;
}
I2C_Stop();
}
/*****************************************************/
void nextline(void)
{
I2C_Start();
I2C_out(Slave);
I2C_out(Comsend);
I2C_out(Line2);
I2C_Stop();
}
void CGRAM (void)
{
I2C_Start();
I2C_out(Slave);
I2C_out(Comsend);
I2C_out(0x38); //go to instructino table 0
I2C_out(0x40); //Set CGRAM addRESETs to 0x00
I2C_Stop();
delay(10);
I2C_Start();
I2C_out(Slave);
I2C_out(Datasend);
I2C_out(0x00); //write to first CGRAM addRESETs
I2C_out(0x1E);
I2C_out(0x18);
I2C_out(0x14);
I2C_out(0x12);
I2C_out(0x01);
I2C_out(0x00);
I2C_out(0x00); //8 bytes per character
I2C_out(0x00);
//continue writing to remaining CGRAM if desired
I2C_Stop();
}
/****************************************************
* Initialization For ST7032i *
*****************************************************/
void init_LCD()
{
I2C_Start();
I2C_out(Slave);
I2C_out(Comsend);
I2C_out(0x38);
delay(10);
I2C_out(0x39);
delay(10);
I2C_out(0x14);
I2C_out(0x78);
I2C_out(0x5D);
I2C_out(0x6D);
I2C_out(0x0C);
I2C_out(0x01);
I2C_out(0x06);
delay(10);
I2C_Stop();
//CGRAM(); //define CGRAM
I2C_Start();
I2C_out(Slave);
I2C_out(Comsend);
I2C_out(0x39);
I2C_out(0x01); //go back Home
I2C_Stop();
delay(10);
}
/*****************************************************/
/*****************************************************/
void setup() {
pinMode(RESET, OUTPUT);
pinMode(SDO, OUTPUT);
pinMode(SCLK, OUTPUT);
digitalWrite(RESET, LOW);
delay(10);
digitalWrite(RESET, HIGH);
delay(100);
}
void loop() {
init_LCD();
delay(2);
Show(text1);
nextline();
Show(text2);
delay(2500);
while(1){
digitalWrite(SDO, HIGH);
delay(1000);
}
}
