//OLED.ino test or application code for the TTGO/ESP8266/OLED
#include "OLED.h"#define SDA D4#define SCL D5#define RST D2
OLED display(SDA, SCL, RST);
char *s1 = "Hello World!";
#define Pt_Mess_Row 0#define Pt_Mess_Col 0
void setup(){ /*pinMode(RST, OUTPUT); digitalWrite(RST, LOW); // turn D2 low to reset OLED delay(50); digitalWrite(RST, HIGH); // while OLED is running, must set D2 in high delay(100);*/ display.begin(); display.print(s1,Pt_Mess_Row,Pt_Mess_Col); display.print('&'); display.print(165);}void loop() { }--------------------------------------------------------------------//OLED.cpp Application file for OLED////Original code from github.com/klarsys/esp8266-OLED//command 0xDA,0x12 changed to 0xDA,0x22 for 128x32 display#include <Wire.h>#include "OLED.h"
//==========================================================//
// Small 8x8 fontstatic const char myFont[][8] PROGMEM = { {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},{0x00,0x00,0x5F,0x00,0x00,0x00,0x00,0x00},{0x00,0x00,0x07,0x00,0x07,0x00,0x00,0x00},{0x00,0x14,0x7F,0x14,0x7F,0x14,0x00,0x00},{0x00,0x24,0x2A,0x7F,0x2A,0x12,0x00,0x00},{0x00,0x23,0x13,0x08,0x64,0x62,0x00,0x00},{0x00,0x36,0x49,0x55,0x22,0x50,0x00,0x00},{0x00,0x00,0x05,0x03,0x00,0x00,0x00,0x00},{0x00,0x1C,0x22,0x41,0x00,0x00,0x00,0x00},{0x00,0x41,0x22,0x1C,0x00,0x00,0x00,0x00},{0x00,0x08,0x2A,0x1C,0x2A,0x08,0x00,0x00},{0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00},{0x00,0xA0,0x60,0x00,0x00,0x00,0x00,0x00},{0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00},{0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00},{0x00,0x20,0x10,0x08,0x04,0x02,0x00,0x00},{0x00,0x3E,0x51,0x49,0x45,0x3E,0x00,0x00},{0x00,0x00,0x42,0x7F,0x40,0x00,0x00,0x00},{0x00,0x62,0x51,0x49,0x49,0x46,0x00,0x00},{0x00,0x22,0x41,0x49,0x49,0x36,0x00,0x00},{0x00,0x18,0x14,0x12,0x7F,0x10,0x00,0x00},{0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00},{0x00,0x3C,0x4A,0x49,0x49,0x30,0x00,0x00},{0x00,0x01,0x71,0x09,0x05,0x03,0x00,0x00},{0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00},{0x00,0x06,0x49,0x49,0x29,0x1E,0x00,0x00},{0x00,0x00,0x36,0x36,0x00,0x00,0x00,0x00},{0x00,0x00,0xAC,0x6C,0x00,0x00,0x00,0x00},{0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x00},{0x00,0x14,0x14,0x14,0x14,0x14,0x00,0x00},{0x00,0x41,0x22,0x14,0x08,0x00,0x00,0x00},{0x00,0x02,0x01,0x51,0x09,0x06,0x00,0x00},{0x00,0x32,0x49,0x79,0x41,0x3E,0x00,0x00},{0x00,0x7E,0x09,0x09,0x09,0x7E,0x00,0x00},{0x00,0x7F,0x49,0x49,0x49,0x36,0x00,0x00},{0x00,0x3E,0x41,0x41,0x41,0x22,0x00,0x00},{0x00,0x7F,0x41,0x41,0x22,0x1C,0x00,0x00},{0x00,0x7F,0x49,0x49,0x49,0x41,0x00,0x00},{0x00,0x7F,0x09,0x09,0x09,0x01,0x00,0x00},{0x00,0x3E,0x41,0x41,0x51,0x72,0x00,0x00},{0x00,0x7F,0x08,0x08,0x08,0x7F,0x00,0x00},{0x00,0x41,0x7F,0x41,0x00,0x00,0x00,0x00},{0x00,0x20,0x40,0x41,0x3F,0x01,0x00,0x00},{0x00,0x7F,0x08,0x14,0x22,0x41,0x00,0x00},{0x00,0x7F,0x40,0x40,0x40,0x40,0x00,0x00},{0x00,0x7F,0x02,0x0C,0x02,0x7F,0x00,0x00},{0x00,0x7F,0x04,0x08,0x10,0x7F,0x00,0x00},{0x00,0x3E,0x41,0x41,0x41,0x3E,0x00,0x00},{0x00,0x7F,0x09,0x09,0x09,0x06,0x00,0x00},{0x00,0x3E,0x41,0x51,0x21,0x5E,0x00,0x00},{0x00,0x7F,0x09,0x19,0x29,0x46,0x00,0x00},{0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00},{0x00,0x01,0x01,0x7F,0x01,0x01,0x00,0x00},{0x00,0x3F,0x40,0x40,0x40,0x3F,0x00,0x00},{0x00,0x1F,0x20,0x40,0x20,0x1F,0x00,0x00},{0x00,0x3F,0x40,0x38,0x40,0x3F,0x00,0x00},{0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x00},{0x00,0x03,0x04,0x78,0x04,0x03,0x00,0x00},{0x00,0x61,0x51,0x49,0x45,0x43,0x00,0x00},{0x00,0x7F,0x41,0x41,0x00,0x00,0x00,0x00},{0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00},{0x00,0x41,0x41,0x7F,0x00,0x00,0x00,0x00},{0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x00},{0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00},{0x00,0x01,0x02,0x04,0x00,0x00,0x00,0x00},{0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x00},{0x00,0x7F,0x48,0x44,0x44,0x38,0x00,0x00},{0x00,0x38,0x44,0x44,0x28,0x00,0x00,0x00},{0x00,0x38,0x44,0x44,0x48,0x7F,0x00,0x00},{0x00,0x38,0x54,0x54,0x54,0x18,0x00,0x00},{0x00,0x08,0x7E,0x09,0x02,0x00,0x00,0x00},{0x00,0x18,0xA4,0xA4,0xA4,0x7C,0x00,0x00},{0x00,0x7F,0x08,0x04,0x04,0x78,0x00,0x00},{0x00,0x00,0x7D,0x00,0x00,0x00,0x00,0x00},{0x00,0x80,0x84,0x7D,0x00,0x00,0x00,0x00},{0x00,0x7F,0x10,0x28,0x44,0x00,0x00,0x00},{0x00,0x41,0x7F,0x40,0x00,0x00,0x00,0x00},{0x00,0x7C,0x04,0x18,0x04,0x78,0x00,0x00},{0x00,0x7C,0x08,0x04,0x7C,0x00,0x00,0x00},{0x00,0x38,0x44,0x44,0x38,0x00,0x00,0x00},{0x00,0xFC,0x24,0x24,0x18,0x00,0x00,0x00},{0x00,0x18,0x24,0x24,0xFC,0x00,0x00,0x00},{0x00,0x00,0x7C,0x08,0x04,0x00,0x00,0x00},{0x00,0x48,0x54,0x54,0x24,0x00,0x00,0x00},{0x00,0x04,0x7F,0x44,0x00,0x00,0x00,0x00},{0x00,0x3C,0x40,0x40,0x7C,0x00,0x00,0x00},{0x00,0x1C,0x20,0x40,0x20,0x1C,0x00,0x00},{0x00,0x3C,0x40,0x30,0x40,0x3C,0x00,0x00},{0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00},{0x00,0x1C,0xA0,0xA0,0x7C,0x00,0x00,0x00},{0x00,0x44,0x64,0x54,0x4C,0x44,0x00,0x00},{0x00,0x08,0x36,0x41,0x00,0x00,0x00,0x00},{0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x00},{0x00,0x41,0x36,0x08,0x00,0x00,0x00,0x00},{0x00,0x02,0x01,0x01,0x02,0x01,0x00,0x00},{0x00,0x02,0x05,0x05,0x02,0x00,0x00,0x00} };
//==========================================================//// Resets display depending on the actual mode.void OLED::reset_display(void){ displayOff(); clear_display(); displayOn();}
//==========================================================//// Turns display on.void OLED::displayOn(void){ sendcommand(0xaf); //display on}
//==========================================================//// Turns display off.void OLED::displayOff(void){ sendcommand(0xae); //display off}
//==========================================================//// Clears the display by sending 0 to all the screen map.void OLED::clear_display(void){ unsigned char i,k; for(k=0;k<8;k++) { setXY(k,0); { for(i=0;i<(128 + 2 * _offset);i++) //locate all COL { SendChar(0); //clear all COL //delay(10); } } }}
//==========================================================//// Actually this sends a byte, not a char to draw in the display. // Display's chars uses 8 byte font the small ones and 96 bytes// for the big number font.void OLED::SendChar(unsigned char data) { //if (interrupt && !doing_menu) return; // Stop printing only if interrupt is call but not in button functions Wire.beginTransmission(_address); // begin transmitting Wire.write(0x40);//data mode Wire.write(data); Wire.endTransmission(); // stop transmitting}
//==========================================================//// Prints a display char (not just a byte) in coordinates X Y,// being multiples of 8. This means we have 16 COLS (0-15) // and 8 ROWS (0-7).void OLED::sendCharXY(unsigned char data, int X, int Y){ setXY(X, Y); Wire.beginTransmission(_address); // begin transmitting Wire.write(0x40);//data mode for(int i=0;i<8;i++) Wire.write(pgm_read_byte(myFont[data-0x20]+i)); Wire.endTransmission(); // stop transmitting}
//==========================================================//// Used to send commands to the display.void OLED::sendcommand(unsigned char com){ Wire.beginTransmission(_address); //begin transmitting Wire.write(0x80); //command mode Wire.write(com); Wire.endTransmission(); // stop transmitting}
//==========================================================//// Set the cursor position in a 16 COL * 8 ROW map.void OLED::setXY(unsigned char row,unsigned char col){ sendcommand(0xb0+row); //set page address sendcommand(_offset+(8*col&0x0f)); //set low col address sendcommand(0x10+((8*col>>4)&0x0f)); //set high col address}
//==========================================================//// Prints a string regardless the cursor position.void OLED::sendStr(unsigned char *string){ unsigned char i=0; while(*string) { for(i=0;i<8;i++) { SendChar(pgm_read_byte(myFont[*string-0x20]+i)); } *string++; }}
//==========================================================//// Prints a string in coordinates X Y, being multiples of 8.// This means we have 16 COLS (0-15) and 8 ROWS (0-7).void OLED::sendStrXY( const char *string, int X, int Y){ setXY(X,Y); unsigned char i=0; while(*string) { for(i=0;i<8;i++) { SendChar(pgm_read_byte(myFont[*string-0x20]+i)); } *string++; }}
//==========================================================//// Inits oled and draws logo at startupvoid OLED::init_OLED(void){ sendcommand(0xae); //display off sendcommand(0xa6); //Set Normal Display (default) // Adafruit Init sequence for 128x64 OLED module <-- see below for 128x32 sendcommand(0xAE); //DISPLAYOFF sendcommand(0xD5); //SETDISPLAYCLOCKDIV sendcommand(0x80); // the suggested ratio 0x80 sendcommand(0xA8); //SSD1306_SETMULTIPLEX sendcommand(0x3F); sendcommand(0xD3); //SETDISPLAYOFFSET sendcommand(0x0); //no offset sendcommand(0x40 | 0x0); //SETSTARTLINE sendcommand(0x8D); //CHARGEPUMP sendcommand(0x14); sendcommand(0x20); //MEMORYMODE sendcommand(0x00); //0x0 act like ks0108 //sendcommand(0xA0 | 0x1); //SEGREMAP //Rotate screen 180 deg sendcommand(0xA0); //sendcommand(0xC8); //COMSCANDEC Rotate screen 180 Deg sendcommand(0xC0); sendcommand(0xDA); //0xDA sendcommand(0x22); //COMSCANDEC <--- from 0x12 for 128x32 display sendcommand(0x81); //SETCONTRAS sendcommand(0xCF); // sendcommand(0xd9); //SETPRECHARGE sendcommand(0xF1); sendcommand(0xDB); //SETVCOMDETECT sendcommand(0x40); sendcommand(0xA4); //DISPLAYALLON_RESUME sendcommand(0xA6); //NORMALDISPLAY
clear_display(); sendcommand(0x2e); // stop scroll //----------------------------REVERSE comments----------------------------// sendcommand(0xa0); //seg re-map 0->127(default) sendcommand(0xa1); //seg re-map 127->0 sendcommand(0xc8); delay(1000); //----------------------------REVERSE comments----------------------------// // sendcommand(0xa7); //Set Inverse Display // sendcommand(0xae); //display off sendcommand(0x20); //Set Memory Addressing Mode sendcommand(0x00); //Set Memory Addressing Mode ab Horizontal addressing mode // sendcommand(0x02); // Set Memory Addressing Mode ab Page addressing mode(RESET) }
//==========================================================//
OLED::OLED(uint8_t sda, uint8_t scl, uint8_t rst, uint8_t address, uint8_t offset) { _sda = sda; _scl = scl; _rst = rst; _address = address; _offset = offset;}
void OLED::begin(void) { // set up i2c pinMode(_rst, OUTPUT); digitalWrite(_rst, LOW); // turn D2 low to reset OLED delay(50); digitalWrite(_rst, HIGH); // while OLED is running, must set D2 in high delay(100); Wire.begin(_sda, _scl); init_OLED(); reset_display();}
void OLED::on(void) { DEBUG_PRINTLN("on"); displayOn();}
void OLED::off(void) { DEBUG_PRINTLN("off"); displayOff();}
void OLED::clear(void) { DEBUG_PRINTLN("clear"); clear_display();}
void OLED::print(char *s, uint8_t r, uint8_t c) { DEBUG_PRINT("print "); DEBUG_PRINT(r); DEBUG_PRINT(","); DEBUG_PRINT(c); DEBUG_PRINT(" "); DEBUG_PRINTLN(s); sendStrXY(s, r, c);} void OLED::print(char ch){ for(int i=0;i<8;i++) { SendChar(pgm_read_byte(myFont[ch-0x20]+i)); } } void OLED::print(int ii){ uint8_t kk[6]; int pp = 0; while ( ii) { kk[pp++] = ii%10; ii /= 10;} while (pp) { print(char(0x30 + kk[--pp])); }/* while (ii){ print(char(0x30 + (ii % 10))); ii= ii/10; }*/ }
/------------------------------------------------------------//OLED.h Header file//Original code from github.com/klarsys/esp8266-OLED#ifndef OLED_H#define OLED_H
#if ARDUINO >= 100 #include "Arduino.h"#else #include "WProgram.h"#endif
// Uncomment to enable printing out nice debug messages.//#define OLED_DEBUG
// Define where debug output will be printed.#define DEBUG_PRINTER Serial
// Setup debug printing macros.#ifdef OLED_DEBUG #define DEBUG_PRINT(...) { DEBUG_PRINTER.print(__VA_ARGS__); } #define DEBUG_PRINTLN(...) { DEBUG_PRINTER.println(__VA_ARGS__); }#else #define DEBUG_PRINT(...) {} #define DEBUG_PRINTLN(...) {}#endif
class OLED { public: OLED(uint8_t sda, uint8_t scl, uint8_t rst,uint8_t address=0x3c, uint8_t offset=0); void begin(void); void on(void); void off(void); void clear(void); void print(char *s, uint8_t r=0, uint8_t c=0); void print(char ch); void print(int ii); private: uint8_t _sda, _scl, _rst, _address, _offset; void reset_display(void); void displayOn(void); void displayOff(void); void clear_display(void); void sendCharXY(unsigned char data, int X, int Y); void sendcommand(unsigned char com); void setXY(unsigned char row,unsigned char col); void sendStr(unsigned char *string); void sendStrXY( const char *string, int X, int Y); void SendChar(unsigned char ch); void init_OLED(void);};
#endif//END OF PAGE