Anonymní profil Dynko – Programujte.com

Ahoj,

rozchodil jsem si LCD s radicem 7066 s Arduinem pres 8bit shiftregister. Nicmene v jedne chvili inicializace (v kodu asi tri odstavce ke konci, okomentovane otazniky) musim dat cekani ~1000us, aby se mi displej zapnul. Vse ostatni slape bez zpozdeni, zkousel jsem i vysoke hodnoty cekani pri trojitem initu, abych overil, zda se mi displej inicializuje spravne, ale vysledek je stejny. Co to muze znamenat?

void init4bit()
{
  //first init
  delay(50);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 67);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 3);
  digitalWrite(latchPin, HIGH);

  //second init
  delay(5);  
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 67);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 3);
  digitalWrite(latchPin, HIGH);
  
  //third init
  delay(1);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 67);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 3);
  digitalWrite(latchPin, HIGH);

  //set 4bit mode
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 66);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 2);
  digitalWrite(latchPin, HIGH);

  //set 4bit mode, set 2line display
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 66);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 2);
  digitalWrite(latchPin, HIGH);

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 72);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 8);
  digitalWrite(latchPin, HIGH);

  //clear display
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 64);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 0);
  digitalWrite(latchPin, HIGH);
  
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 65);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 1);
  digitalWrite(latchPin, HIGH);
  
  //display off
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 64);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 0);
  digitalWrite(latchPin, HIGH);

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 72);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 8);
  digitalWrite(latchPin, HIGH);

  //display on
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 64);
  digitalWrite(latchPin, HIGH);
  delayMicroseconds(900);                    //???????????????????
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 0);
  digitalWrite(latchPin, HIGH);
  
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 76);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 12);
  digitalWrite(latchPin, HIGH);

  //entry mode set
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 64);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 0);
  digitalWrite(latchPin, HIGH);

  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 70);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 6);
  digitalWrite(latchPin, HIGH);

  //write "D"
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 128+64+4);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 128+4);
  digitalWrite(latchPin, HIGH);
 
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 128+64+4);
  digitalWrite(latchPin, HIGH);
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin, clockPin, MSBFIRST, 128+4);
  digitalWrite(latchPin, HIGH);
}