157 lines
3.2 KiB
C++
157 lines
3.2 KiB
C++
#include <Arduino.h>
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#include <string.h>
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#include "display.h"
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#include <Wire.h>
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#define WIRE_MAX 32
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#define TRANSACTION_START wire->setClock(400000UL);
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#define TRANSACTION_END wire->setClock(100000UL);
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void temporary(){
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const uint8_t resetPin = 4;
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// Adafruit_SSD1306 display(width, height, &Wire, resetPin);
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Display display(resetPin);
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// / address for I2C 128x32
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// display.begin(SSD1306_SWITCHCAPVCC, 0x3C)
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display.begin();
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// display.clearDisplay();
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display.clear(true); // no need to call display() after to apply
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// display.drawPixel(x, y, SSD1306_WHITE)
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// display.drawPixel(x, y, SSD1306_BLACK)
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// display.display()
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}
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void Display::send_command(const uint8_t c){
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_wire->beginTransmission(_i2caddr);
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_wire->write((uint8_t) 0x00);
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_wire->write(c);
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_wire->endTransmission();
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}
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void Display::send_commands(const uint8_t *cc, const uint8_t n){
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_wire->beginTransmission(_i2caddr);
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_wire->write((uint8_t) 0x00);
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_wire->write(c);
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_wire->endTransmission();
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uint8_t written = 1;
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while(n--){
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if( written >= WIRE_MAX ){
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_wire->endTransmission();
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_wire->beginTransmission(_i2caddr);
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_wire->write((uint8_t) 0x00);
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written = 1;
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}
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_wire->write(pgm_read_byte(cc++));
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written++;
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}
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_wire->endTransmission();
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}
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void Display::Display(const resetPin){
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_rstPin = resetPin;
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_wire = &Wire;
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}
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void Display::begin(){
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_wire.begin();
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// reset sequence
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if( _rstPin >= 0 ){
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pinMode(rstPin, OUTPUT);
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digitalWrite(rstPin, HIGH);
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delay(1);
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digitalWrite(rstPin, LOW);
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delay(10);
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digitalWrite(rstPin, HIGH);
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}
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TRANSACTION_START
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// init sequence
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static const uint8_t PROGMEM init1[] = {
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DSP_DISPLAYOFF,
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DSP_SETDISPLAYCLOCKDIV,
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0x80, // suggested ratio
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DSP_SETMULTIPLEX
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};
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send_commands(init1, sizeof(init1));
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send_command(_height - 1);
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static const uint8_t PROGMEM init2[] = {
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DSP_SETDISPLAYOFFSET,
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0x0,
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DSP_SETSTARTLINE | 0x0,
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DSP_CHARGEPUMP
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};
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sendcommands(init2, sizeof(init2));
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send_command(0x14);
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static const uint8_t PROGMEM init3[] = {
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DSP_MEMORYMODE,
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0x00,
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DSP_SEGREMAP | 0x1,
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DSP_COMSCANDEC
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};
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sendcommands(init3, sizeof(init3));
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sendcommand(DSP_SETCOMPINS);
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sendcommand(_comPin);
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sendcommand(DSP_SETCONTRAST);
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sendcommand(_contrast);
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send_command(DSP_SETPRECHARGE);
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send_command(0xF1);
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static const uint8_t PROGMEM init5[] = {
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DSP_SETVCOMPDETECT,
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0x40,
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DSP_DISPLAYALLON_RESUME,
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DSP_NORMALDISPLAY,
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DSP_DEACTIVATE_SCROLL,
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DSP_DISPLAY_ON
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};
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sendcommands(init5, sizeof(init5));
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TRANSACTION_END
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return;
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}
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void Display::clear(){
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TRANSACTION_START
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static const uint8_t PROGMEM dlist1[] = {
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DSP_PAGEADDR,
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0, // Page start address
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0xFF, // Page end (not really, but works here)
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DSP_COLUMNADDR,
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0 // Column start address
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};
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send_commands(dlist1, sizeof(dlist1));
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send_command(_width - 1); // Column end address
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_wire->beginTransmission(_i2caddr);
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_wire->write((uint8_t) 0x40);
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uint16_t count = _width * ((_height + 7) / 8);
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uint8_t written = 1;
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while(count--){
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if( written >= WIRE_MAX ){
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_wire->endTransmission();
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_wire->beginTransmission(_i2caddr);
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_wire->write((uint8_t) 0x40);
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written = 1;
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}
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_wire->write(0);
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}
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_wire->endTransmission();
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TRANSACTION_END
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} |