diff options
Diffstat (limited to 'obdlogger/SSD1306.cpp')
| -rw-r--r-- | obdlogger/SSD1306.cpp | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/obdlogger/SSD1306.cpp b/obdlogger/SSD1306.cpp new file mode 100644 index 0000000..7f7b8e8 --- /dev/null +++ b/obdlogger/SSD1306.cpp @@ -0,0 +1,273 @@ +#include <avr/pgmspace.h> +#include <util/delay.h> +#include <stdlib.h> +#include <Wire.h> +#include "SSD1306.h" + +SSD1306::SSD1306(int8_t SCLK, int8_t DC, int8_t RST, int8_t CS) { + cs = CS; + rst = RST; + dc = DC; + sclk = SCLK; +} + +// initializer for I2C - we only indicate the reset pin! + SSD1306::SSD1306(int8_t reset) { + sclk = dc = cs = -1; + rst = reset; +} + + +void SSD1306::begin(uint8_t vccstate, uint8_t i2caddr) { + _i2caddr = i2caddr; + + + // set pin directions + // I2C Init + Wire.begin(); // Is this the right place for this? + + // Setup reset pin direction (used by both SPI and I2C) + pinMode(rst, OUTPUT); + digitalWrite(rst, HIGH); + // VDD (3.3V) goes high at start, lets just chill for a ms + delay(1); + // bring reset low + digitalWrite(rst, LOW); + // wait 10ms + delay(10); + // bring out of reset + digitalWrite(rst, HIGH); + // turn on VCC (9V?) + #if defined SSD1306_128_32 + // Init sequence for 128x32 OLED module + ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE + ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5 + ssd1306_command(0x80); // the suggested ratio 0x80 + ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8 + ssd1306_command(0x1F); + ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3 + ssd1306_command(0x0); // no offset + ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0 + ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D + if (vccstate == SSD1306_EXTERNALVCC) + { ssd1306_command(0x10); } + else + { ssd1306_command(0x14); } + ssd1306_command(SSD1306_MEMORYMODE); // 0x20 + ssd1306_command(0x00); // 0x0 act like ks0108 + ssd1306_command(SSD1306_SEGREMAP | 0x1); + ssd1306_command(SSD1306_COMSCANDEC); + ssd1306_command(SSD1306_SETCOMPINS); // 0xDA + ssd1306_command(0x02); + ssd1306_command(SSD1306_SETCONTRAST); // 0x81 + ssd1306_command(0x8F); + ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9 + if (vccstate == SSD1306_EXTERNALVCC) + { ssd1306_command(0x22); } + else + { ssd1306_command(0xF1); } + ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB + ssd1306_command(0x40); + ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4 + ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6 + #endif + + #if defined SSD1306_128_64 + // Init sequence for 128x64 OLED module + ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE + ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5 + ssd1306_command(0x80); // the suggested ratio 0x80 + ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8 + ssd1306_command(0x3F); + ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3 + ssd1306_command(0x0); // no offset + ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0 + ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D + if (vccstate == SSD1306_EXTERNALVCC) + { ssd1306_command(0x10); } + else + { ssd1306_command(0x14); } + ssd1306_command(SSD1306_MEMORYMODE); // 0x20 + ssd1306_command(0x00); // 0x0 act like ks0108 + ssd1306_command(SSD1306_SEGREMAP | 0x1); + ssd1306_command(SSD1306_COMSCANDEC); + ssd1306_command(SSD1306_SETCOMPINS); // 0xDA + ssd1306_command(0x12); + ssd1306_command(SSD1306_SETCONTRAST); // 0x81 + if (vccstate == SSD1306_EXTERNALVCC) + { ssd1306_command(0x9F); } + else + { ssd1306_command(0xCF); } + ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9 + if (vccstate == SSD1306_EXTERNALVCC) + { ssd1306_command(0x22); } + else + { ssd1306_command(0xF1); } + ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB + ssd1306_command(0x40); + ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4 + ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6 + #endif + + ssd1306_command(SSD1306_DISPLAYON);//--turn on oled panel + + // clear screen + delay(5); + + ssd1306_command(SSD1306_SETLOWCOLUMN | 0x0); // low col = 0 + ssd1306_command(SSD1306_SETHIGHCOLUMN | 0x0); // hi col = 0 + ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0 + + for (byte i = 0; i < SSD1306_LCDHEIGHT / 8; i++) { + // send a bunch of data in one xmission + ssd1306_command(0xB0 + i);//set page address + ssd1306_command(0);//set lower column address + ssd1306_command(0x10);//set higher column address + + for(byte j = 0; j < 8; j++){ + Wire.beginTransmission(_i2caddr); + Wire.write(0x40); + for (byte k = 0; k < SSD1306_LCDWIDTH / 8; k++) { + Wire.write(0); + } + Wire.endTransmission(); + } + } +} + + +void SSD1306::invertDisplay(uint8_t i) { + if (i) { + ssd1306_command(SSD1306_INVERTDISPLAY); + } else { + ssd1306_command(SSD1306_NORMALDISPLAY); + } +} + +void SSD1306::ssd1306_command(uint8_t c) { + // I2C + uint8_t control = 0x00; // Co = 0, D/C = 0 + Wire.beginTransmission(_i2caddr); + Wire.write(control); + Wire.write(c); + Wire.endTransmission(); +} + +// startscrollright +// Activate a right handed scroll for rows start through stop +// Hint, the display is 16 rows tall. To scroll the whole display, run: +// display.scrollright(0x00, 0x0F) +void SSD1306::startscrollright(uint8_t start, uint8_t stop){ + ssd1306_command(SSD1306_RIGHT_HORIZONTAL_SCROLL); + ssd1306_command(0X00); + ssd1306_command(start); + ssd1306_command(0X00); + ssd1306_command(stop); + ssd1306_command(0X01); + ssd1306_command(0XFF); + ssd1306_command(SSD1306_ACTIVATE_SCROLL); +} + +// startscrollleft +// Activate a right handed scroll for rows start through stop +// Hint, the display is 16 rows tall. To scroll the whole display, run: +// display.scrollright(0x00, 0x0F) +void SSD1306::startscrollleft(uint8_t start, uint8_t stop){ + ssd1306_command(SSD1306_LEFT_HORIZONTAL_SCROLL); + ssd1306_command(0X00); + ssd1306_command(start); + ssd1306_command(0X00); + ssd1306_command(stop); + ssd1306_command(0X01); + ssd1306_command(0XFF); + ssd1306_command(SSD1306_ACTIVATE_SCROLL); +} + +// startscrolldiagright +// Activate a diagonal scroll for rows start through stop +// Hint, the display is 16 rows tall. To scroll the whole display, run: +// display.scrollright(0x00, 0x0F) +void SSD1306::startscrolldiagright(uint8_t start, uint8_t stop){ + ssd1306_command(SSD1306_SET_VERTICAL_SCROLL_AREA); + ssd1306_command(0X00); + ssd1306_command(SSD1306_LCDHEIGHT); + ssd1306_command(SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL); + ssd1306_command(0X00); + ssd1306_command(start); + ssd1306_command(0X00); + ssd1306_command(stop); + ssd1306_command(0X01); + ssd1306_command(SSD1306_ACTIVATE_SCROLL); +} + +// startscrolldiagleft +// Activate a diagonal scroll for rows start through stop +// Hint, the display is 16 rows tall. To scroll the whole display, run: +// display.scrollright(0x00, 0x0F) +void SSD1306::startscrolldiagleft(uint8_t start, uint8_t stop){ + ssd1306_command(SSD1306_SET_VERTICAL_SCROLL_AREA); + ssd1306_command(0X00); + ssd1306_command(SSD1306_LCDHEIGHT); + ssd1306_command(SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL); + ssd1306_command(0X00); + ssd1306_command(start); + ssd1306_command(0X00); + ssd1306_command(stop); + ssd1306_command(0X01); + ssd1306_command(SSD1306_ACTIVATE_SCROLL); +} + +void SSD1306::stopscroll(void){ + ssd1306_command(SSD1306_DEACTIVATE_SCROLL); +} + +void SSD1306::ssd1306_data(uint8_t c) { + // I2C + uint8_t control = 0x40; // Co = 0, D/C = 1 + Wire.beginTransmission(_i2caddr); + Wire.write(control); + Wire.write(c); + Wire.endTransmission(); +} + +void SSD1306::fill(unsigned char dat) +{ + unsigned char i,j; + + ssd1306_command(0x00);//set lower column address + ssd1306_command(0x10);//set higher column address + ssd1306_command(0xB0);//set page address + + uint8_t twbrbackup = TWBR; + TWBR = 18; // upgrade to 400KHz! + for (byte i=0; i<(SSD1306_LCDHEIGHT/8); i++) + { + // send a bunch of data in one xmission + ssd1306_command(0xB0 + i);//set page address + ssd1306_command(0);//set lower column address + ssd1306_command(0x10);//set higher column address + + for(byte j = 0; j < 8; j++){ + Wire.beginTransmission(_i2caddr); + Wire.write(0x40); + for (byte k = 0; k < 16; k++) { + Wire.write(dat); + } + Wire.endTransmission(); + } + } + TWBR = twbrbackup; +} + +void SSD1306::draw8x8(byte* buffer, uint8_t x, uint8_t y) +{ + // send a bunch of data in one xmission + ssd1306_command(0xB0 + y);//set page address + ssd1306_command(x & 0xf);//set lower column address + ssd1306_command(0x10 | (x >> 4));//set higher column address + + Wire.beginTransmission(_i2caddr); + Wire.write(0x40); + Wire.write(buffer, 8); + Wire.endTransmission(); +} |