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ESP8266lib/ext/lcd/SSD1306.h

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#ifndef LCD_SSD1306
#define LCD_SSD1306
#include "../../io/SoftI2C.h"
// NOTE: this is almost the same as SH1106
// https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
//#define SSD1306_128_64 1
//#define SSD1306_64_48 1 // https://github.com/mcauser/Adafruit_SSD1306/blob/esp8266-64x48/Adafruit_SSD1306.cpp
#if defined SSD1306_128_64
#define SSD1306_LCDWIDTH 128
#define SSD1306_LCDHEIGHT 64
#elif defined SSD1306_128_32
#define SSD1306_LCDWIDTH 128
#define SSD1306_LCDHEIGHT 32
#elif defined SSD1306_96_16
#define SSD1306_LCDWIDTH 96
#define SSD1306_LCDHEIGHT 16
#elif defined SSD1306_64_48
#define SSD1306_LCDWIDTH 64
#define SSD1306_LCDHEIGHT 48
#else
#error "SSD1306 display size not defined"
#endif
#define SSD1306_SETCONTRAST 0x81
#define SSD1306_DISPLAYALLON_RESUME 0xA4
#define SSD1306_DISPLAYALLON 0xA5
#define SSD1306_NORMALDISPLAY 0xA6
#define SSD1306_INVERTDISPLAY 0xA7
#define SSD1306_DISPLAYOFF 0xAE
#define SSD1306_DISPLAYON 0xAF
#define SSD1306_SETDISPLAYOFFSET 0xD3
#define SSD1306_SETCOMPINS 0xDA
#define SSD1306_SETVCOMDETECT 0xDB
#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
#define SSD1306_SETPRECHARGE 0xD9
#define SSD1306_SETMULTIPLEX 0xA8
#define SSD1306_SETLOWCOLUMN 0x00
#define SSD1306_SETHIGHCOLUMN 0x10
#define SSD1306_SETSTARTLINE 0x40
#define SSD1306_MEMORYMODE 0x20
#define SSD1306_COLUMNADDR 0x21
#define SSD1306_PAGEADDR 0x22
#define SSD1306_COMSCANINC 0xC0
#define SSD1306_COMSCANDEC 0xC8
#define SSD1306_SEGREMAP 0xA0
#define SSD1306_CHARGEPUMP 0x8D
#define SSD1306_EXTERNALVCC 0x1
#define SSD1306_SWITCHCAPVCC 0x2
// Scrolling #defines
#define SSD1306_ACTIVATE_SCROLL 0x2F
#define SSD1306_DEACTIVATE_SCROLL 0x2E
#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
template <typename I2C> class SSD1306 {
private:
static constexpr uint8_t ADDR7 = 0b0111100;
bool inited = false;
I2C& i2c;
public:
SSD1306(I2C& i2c) : i2c(i2c) {
}
bool isPresent() {
return i2c.query(ADDR7);
}
/** checks if LCD is present and initializes it once / when it was gone */
bool isPresentAndInit() {
bool present = isPresent();
if (!present) {inited = false;}
if ( present && !inited) {initOnce();}
return present;
}
void initOnce() {
if (inited) {return;}
init();
inited = true;
}
void flush(const uint8_t* data) {
// special handling for 64x48 oled shield
#if SSD1306_LCDWIDTH == 64 && SSD1306_LCDHEIGHT == 48
sendCommand(SSD1306_COLUMNADDR);
sendCommand(32);
sendCommand(32 + SSD1306_LCDWIDTH - 1);
#else
sendCommand(SSD1306_COLUMNADDR, 0, SSD1306_LCDWIDTH-1);
//sendCommand(SSD1306_COLUMNADDR);
//sendCommand(0); // Column start address (0 = reset)
//sendCommand(SSD1306_LCDWIDTH-1); // Column end address (127 = reset)
#endif
sendCommand(SSD1306_PAGEADDR, 0, (SSD1306_LCDHEIGHT/8)-1);
//sendCommand(SSD1306_PAGEADDR);
//sendCommand(0); // Page start address (0 = reset)
//sendCommand( (SSD1306_LCDHEIGHT/8)-1 ); // Page end address
// #if SSD1306_LCDHEIGHT == 64
// sendCommand(7); // Page end address
// #endif
// #if SSD1306_LCDHEIGHT == 48
// sendCommand(3); // Page end address
// #endif
// #if SSD1306_LCDHEIGHT == 32
// sendCommand(3); // Page end address
// #endif
// #if SSD1306_LCDHEIGHT == 16
// sendCommand(1); // Page end address
// #endif
// for (uint16_t i=0; i<(SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT/8); i++) {
// // send a bunch of data in one xmission
// i2c::startWrite(ADDR7);
// bool ok = i2c::writeByteAndCheck(0x40);
// if (!ok) {os_printf("failed line\n");}
// for (uint8_t x = 0; x < 16; ++x) {
// i2c::writeByteAndCheck(data[i]);
// ++i;
// }
// i--;
// i2c::stop();
// }
i2c.startWrite(ADDR7);
bool ok = i2c.writeByteAndCheck(0x40);
if (!ok) {os_printf("failed write data\n");}
//for (uint16_t i=0; i < (SSD1306_LCDWIDTH*SSD1306_LCDHEIGHT/8); i++) {
for (uint16_t i=0; i < 16; i++) {
i2c.writeByteAndCheck(data[i]);
}
i2c.stop();
}
private:
void init() {
uint8_t vccstate = 0;
sendCommand(SSD1306_DISPLAYOFF); // 0xAE
sendCommand(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
sendCommand(0x80); // the suggested ratio 0x80
sendCommand(SSD1306_SETMULTIPLEX); // 0xA8: multiplexer (31 == 32MUX, 63 == 64MUX)
sendCommand(SSD1306_LCDHEIGHT - 1);
sendCommand(SSD1306_SETDISPLAYOFFSET); // 0xD3: vertical shift 0-63
sendCommand(0x0); // no offset
sendCommand(SSD1306_SETSTARTLINE | 0x0); // line #0
sendCommand(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC) {
sendCommand(0x10);
} else {
sendCommand(0x14);
}
//sendCommand(SSD1306_MEMORYMODE); // 0x20: memory mode: hor/ver/page
//sendCommand(0x02); // 0x0 act like ks0108
sendCommand(SSD1306_MEMORYMODE, 0x00); // 0x20: memory mode: hor/ver/page
sendCommand(SSD1306_SEGREMAP | 0x0);
//sendCommand(SSD1306_COMSCANINC); // rotate 0
sendCommand(SSD1306_COMSCANDEC); // rotate 180?
// OLD
// #if defined SSD1306_128_32
// sendCommand(SSD1306_SETCOMPINS); // 0xDA
// sendCommand(0x02);
// sendCommand(SSD1306_SETCONTRAST); // 0x81
// sendCommand(0x8F);
// #elif defined SSD1306_128_64
// sendCommand(SSD1306_SETCOMPINS); // 0xDA
// sendCommand(0x12);
// sendCommand(SSD1306_SETCONTRAST); // 0x81
// if (vccstate == SSD1306_EXTERNALVCC)
// { sendCommand(0x9F); }
// else
// { sendCommand(0xCF); }
// #elif defined SSD1306_96_16
// sendCommand(SSD1306_SETCOMPINS); // 0xDA
// sendCommand(0x2); //ada x12
// sendCommand(SSD1306_SETCONTRAST); // 0x81
// if (vccstate == SSD1306_EXTERNALVCC)
// { sendCommand(0x10); }
// else
// { sendCommand(0xAF); }
// #endif
// NEW
sendCommand(SSD1306_SETCOMPINS); // 0xDA
sendCommand(0x12);
if (vccstate == SSD1306_EXTERNALVCC) {
sendCommand(0x9F);
} else {
sendCommand(0xCF);
}
sendCommand(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC) {
sendCommand(0x22);
} else {
sendCommand(0xF1);
}
sendCommand(SSD1306_SETVCOMDETECT); // 0xDB
sendCommand(0x40);
sendCommand(SSD1306_DISPLAYALLON_RESUME); // 0xA4
sendCommand(SSD1306_NORMALDISPLAY); // 0xA6
sendCommand(SSD1306_DEACTIVATE_SCROLL);
sendCommand(SSD1306_DISPLAYON);//--turn on oled panel
}
private:
void sendCommand(uint8_t cmd) {
bool ok;
ok = i2c.startWrite(ADDR7);
if (!ok) {os_printf("failed start write\n");}
ok = i2c.writeByteAndCheck(0x00); // command
if (!ok) {os_printf("failed command mode\n");}
ok = i2c.writeByteAndCheck(cmd);
if (!ok) {os_printf("failed command\n");}
i2c.stop();
}
void sendCommand(uint8_t cmd, uint8_t v1) {
bool ok;
ok = i2c.startWrite(ADDR7);
if (!ok) {os_printf("failed start write\n");}
ok = i2c.writeByteAndCheck(0x00); // command
if (!ok) {os_printf("failed command mode\n");}
ok = i2c.writeByteAndCheck(cmd);
if (!ok) {os_printf("failed command\n");}
ok = i2c.writeByteAndCheck(0x00); // command
ok = i2c.writeByteAndCheck(v1);
if (!ok) {os_printf("failed command\n");}
i2c.stop();
}
void sendCommand(uint8_t cmd, uint8_t v1, uint8_t v2) {
bool ok;
ok = i2c.startWrite(ADDR7);
if (!ok) {os_printf("failed start write\n");}
ok = i2c.writeByteAndCheck(0x00); // command
if (!ok) {os_printf("failed command mode\n");}
ok = i2c.writeByteAndCheck(cmd);
if (!ok) {os_printf("failed command\n");}
ok = i2c.writeByteAndCheck(0x00); // command
ok = i2c.writeByteAndCheck(v1);
if (!ok) {os_printf("failed command\n");}
ok = i2c.writeByteAndCheck(0x00); // command
ok = i2c.writeByteAndCheck(v2);
if (!ok) {os_printf("failed command\n");}
i2c.stop();
}
};
#endif
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