LCD_NHD-0216CW-AB3 - Display not getting ON
Display not getting ON even though we are giving the command:
command(0x0C); //display ON
Please let us know , if any other things we need to take care
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Hi,
Please refer to the wiring diagram provided on the display’s specification to confirm the connections on your end. Additionally, we have provided the sample code for the Arduino Mega on our website for your reference.
Could you please confirm the interface you are using and the supply voltage and current you are providing to the display?
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Hi, the wiring is done as per the datasheet
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Hi, is there any indication or way to know whether this display is working through hardware (There is not even a flickering activity on the display), as the display is not responding to any commands, and also can you provide us a sample code for the same (apart from the arduino codes any other code).
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This the code which we have written based on your arduino code, but not sure about it...
#include "main.h"
unsigned char text1[] = {"New haven Display----"};
unsigned char text2[] = {"Slim OLED Display---"};
unsigned char text3[] = {"16/20 Characters----"};
unsigned char text4[] = {"!@#$%^&*()_+{}[]<>?~"};
void setup(void)
{
SCL = 1;
SDOUT = 1;
Delay_ms(10);
arduino_command(0x2A); //function set (extended command set)
Delay_ms(30);
arduino_command(0x71); //function selection A, disable internal Vdd regulator
Delay_ms(30);
arduino_data(0x00);
Delay_ms(30);
arduino_command(0x28); //function set (fundamental command set)
Delay_ms(30);
arduino_command(0x08); //display off, cursor off, blink off
Delay_ms(30);
arduino_command(0x2A); //function set (extended command set)
Delay_ms(30);
arduino_command(0x79); //OLED command set enabled
Delay_ms(30);
arduino_command(0xD5); //set display clock divide ratio/oscillator frequency
Delay_ms(30);
arduino_command(0x70); //set display clock divide ratio/oscillator frequency
Delay_ms(30);
arduino_command(0x78); //OLED command set disabled
Delay_ms(30);
arduino_command(0x09); //extended function set (4-lines)
Delay_ms(30);
arduino_command(0x06); //COM SEG direction
Delay_ms(30);
arduino_command(0x72); //function selection B
Delay_ms(30);
arduino_data(0x00); //ROM CGRAM selection
Delay_ms(30);
arduino_command(0x2A); //function set (extended command set)
Delay_ms(30);
arduino_command(0x79); //OLED command set enabled
Delay_ms(30);
arduino_command(0xDA); //set SEG pins hardware configuration
Delay_ms(30);
arduino_command(0x10); //set SEG pins
Delay_ms(30);
arduino_command(0xDC); //function selection C
Delay_ms(30);
arduino_command(0x00); //function selection C
Delay_ms(30);
arduino_command(0x81); //set contrast control
Delay_ms(30);
arduino_command(0x7F); //set contrast control
Delay_ms(30);
arduino_command(0xD9); //set phase length
Delay_ms(30);
arduino_command(0xF1); //set phase length
Delay_ms(30);
arduino_command(0xDB); //set VCOMH deselect level
Delay_ms(30);
arduino_command(0x40); //set VCOMH deselect level
Delay_ms(30);
arduino_command(0x78); //OLED command set disabled
Delay_ms(30);
arduino_command(0x28); //function set (fundamental command set)
Delay_ms(30);
arduino_command(0x01); //clear display
Delay_ms(30);
arduino_command(0x80); //set DDRAM address to 0x00
Delay_ms(30);
arduino_command(0x0C); //display ON
Delay_ms(100);
// arduino_command(0x38);//function set
// Delay_ms(30);
// arduino_command(0x06);//entry mode set
// Delay_ms(30);
// arduino_command(0x02);//return home
// Delay_ms(30);
// arduino_command(0x01);//clear display
// Delay_ms(30);
// arduino_command(0x0c);//display on
// Delay_ms(30);
// arduino_command(0x80);//line 1 character 1
// Delay_ms(30);
}
void arduino_command(uint8_t c) //SCL //SDOUT
{
uint8_t temp = 0xF8, i;
{
SCL = 0;
if((temp & 0x80) >> 7 == 1)
{
SDOUT = 1;
}
else
{
SDOUT = 0;
}
temp = temp << 1;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
if((c & 0x01)==1)
{
SDOUT = 1;
}
else
{
SDOUT = 0;
}
c = c >> 1;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
SDOUT = 0;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
if((c & 0x01) == 1)
{
SDOUT = 1;
}
else
{
SDOUT = 0;
}
c = c >> 1;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
SDOUT = 0;
SCL = 1;
}
}
void arduino_data(uint8_t d)
{
uint8_t temp = 0xF8, i;
temp = 0xFA;
for(i = 0; i < 8; i++)
{
SCL = 0;
if((temp & 0x80) >> 7 == 1)
{
SDOUT = 1;
}
else
{
SDOUT = 0;
}
temp = temp << 1;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
if((d & 0x01) == 1)
{
SDOUT = 1;
}
else
{
SDOUT = 0;
}
d = d >> 1;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
SDOUT = 0;
SCL = 1;
}
for(i = 0; i < 4; i++)
{
SCL = 0;
if((d & 0x01) == 1)
{
SDOUT = 1;
}
else
{
SDOUT = 0;
}
d = d >> 1;
SCL = 1;
}
for(i=0; i < 4; i++)
{
SCL = 0;
SDOUT = 0;
SCL = 1;
}
Delay_ms(10);
}
void arduino_output()
{
int i;
arduino_command(0x01);
Delay_ms(2);
for(i = 0; i < 20; i++)
{
arduino_data(text1[i]);
}
arduino_command(0xA0);
for(i = 0; i < 20; i++)
{
arduino_data(text2[i]);
}
arduino_command(0xC0);
for(i = 0; i < 20; i++)
{
arduino_data(text3[i]);
}
arduino_command(0xE0);
for(i = 0; i < 20; i++)
{
arduino_data(text4[i]);
}
}
void main(void)
{
PCA0MD = 0x00;
OSCICN = 0x83;
P0MDOUT = 0x0D;
XBR1 = 0x40;
setup();
while(1)
{
arduino_output();
while(1);
}
}0
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