tix88
September 21, 2018, 6:47pm
1
Hello everyone, I bought a 20x4 oled display, but I can not display more than two lines, I downloaded the library for 16x2 and with this I managed to see something, I then found a specific library for my type of display but it is not working because I believe there are problems with extensions, could someone help me? I attach the links of the libraries on git hub:
Lib 16x02 : GitHub - gadjet/1602-OLED-Arduino-Library: wide.HK 1602 OLED Library GitHub - jafrado/2004_i2c_oled: Display Driver for the Wide.HK 20x4 SSD1311 Character mode OLED display
Thanks so much
system
September 24, 2018, 2:15pm
2
but it is not working because I believe there are problems with extensions
Why do you believe this? What extensions?
tix88
September 24, 2018, 5:34pm
3
I can not find .cpp files and .h files
tix88
September 24, 2018, 6:14pm
4
With this sketch I can visualize the 4 lines
[code]
//***************************************//
// --- WIDE.HK---//
// --- Revised Date : 02/05/2014
// --- I2C Arduino - Arduino UNO Demo ---//
// --- SSD131x PMOLED Controller ---//
// --- SCL, SDA, GND, VCC(3.3v -5v) ---//
//***************************************//
#include <Wire.h> // *** I2C Mode
#define OLED_Address 0x3c
#define OLED_Command_Mode 0x80
#define OLED_Data_Mode 0x40
void setup()
{
Wire.begin();
}
void loop()
{
int i;
// *** I2C initial *** //
delay(100);
sendCommand(0x80);
sendCommand(0x2A); // **** Set "RE"=1 00101010B
sendCommand(0x71);
sendCommand(0xC0);
sendCommand(0x00);
sendCommand(0x28);
sendCommand(0x08); // **** Set Sleep Mode On
sendCommand(0x2A); // **** Set "RE"=1 00101010B
sendCommand(0x79); // **** Set "SD"=1 01111001B
sendCommand(0xD5);
sendCommand(0x70);
sendCommand(0x78); // **** Set "SD"=0
//sendCommand(0x08);
sendCommand(0x09); // **** Set 5-dot, 3 or 4 line(0x09), 1 or 2 line(0x08)
sendCommand(0x06); // **** Set Com31-->Com0 Seg0-->Seg99
sendCommand(0x72);
sendCommand(0xC0);
sendCommand(0x01);
// **** Set OLED Characterization *** //
sendCommand(0x2A); // **** Set "RE"=1
sendCommand(0x79); // **** Set "SD"=1
// **** CGROM/CGRAM Management *** //
// sendCommand(0x72); // **** Set ROM
// sendCommand(0x00); // **** Set ROM A and 8 CGRAM
sendCommand(0xDC); // **** Set ROM
sendCommand(0x00); // **** Set ROM A and 8 CGRAM
sendCommand(0xDA); // **** Set Seg Pins HW Config
sendCommand(0x10);
sendCommand(0x81); // **** Set Contrast
sendCommand(0xD9); //
sendCommand(0x8F); // **** Set Contrast
sendCommand(0xF1);
sendCommand(0xDB); // **** Set VCOM deselect level
sendCommand(0x30); // **** VCC x 0.83
sendCommand(0xDC); // **** Set gpio - turn EN for 15V generator on.
sendCommand(0x03);
sendCommand(0x78); // **** Exiting Set OLED Characterization
sendCommand(0x28);
//sendCommand(0x2A);
//sendCommand(0x05); // **** Set Entry Mode (invert)
sendCommand(0x06); // **** Set Entry Mode
sendCommand(0x28); // **** Set "IS"=0 , "RE" =0 //28
sendCommand(0x01);
sendCommand(0x80); // **** Set DDRAM Address to 0x80 (line 1 start)
delay(100);
sendCommand(0x0C); // **** Turn on Display
// ********************************************************************//
// **** Show Data Value *** //
send_string("\0"); send_string("1 English - Term 6<>"); //1 ??line
send_string("\0"); send_string("2 English - Term 7<>"); //2 ??line
send_string("\0"); send_string("3 English - Term 8<>"); //3 ??line
send_string("\0"); send_string("4 English - Term 9<>"); //4 ??line
/*
sendCommand(0x2C); //2 in 1 line
*/
while(1);
// **** Show Data Value *** //
}
void sendData(unsigned char data)
{
Wire.beginTransmission(OLED_Address); // **** Start I2C
Wire.write(OLED_Data_Mode); // **** Set OLED Data mode
Wire.write(data);
Wire.endTransmission(); // **** End I2C
}
void sendCommand(unsigned char command)
{
Wire.beginTransmission(OLED_Address); // **** Start I2C
Wire.write(OLED_Command_Mode); // **** Set OLED Command mode
Wire.write(command);
Wire.endTransmission(); // **** End I2C
delay(10);
}
void send_string(const char *String)
{
unsigned char i=0;
while(String[i])
{
sendData(String[i]); // *** Show String to OLED
i++;
}
}
[/code]