High Resolution Gyro Question

Projects Programming
23

yes, kind of. You need to be careful about when you memorise the previous values and handle CTS

may be something like this would be "cleaner":

#include <LiquidCrystal.h>
LiquidCrystal lcd(10, 9, 8, 7, 6, 5);       // put your pin numbers here

const byte lcdContrastPin = 11;   // LCD CONTRAST PIN
const byte CTSPin = 2;            // Clear To Send PIN
const byte RSPin = 3;             // Request Sample PIN

byte DMM_ARRAY[6];                // Where to store the Bytes read

bool Get_data() {
  bool success = (Serial.available() >= 6);
  if (success) Serial.readBytes(DMM_ARRAY, 6);
  return success;
}

void setup() {
  pinMode(CTSPin, OUTPUT);
  pinMode(RSPin, OUTPUT);

  pinMode(lcdContrastPin, OUTPUT);
  analogWrite(lcdContrastPin, 50);    //LCD CONTRAST AMOUNT

  Serial.begin(1000000);
  lcd.begin(16, 2);
  lcd.print(F("GG1320AN21 TEST"));
}

void loop() {
  static float previousValue = 0;
  unsigned long previousMicros = 0;
  float deltaTheta;
  unsigned long currentMicros = micros();    // you could do this with millis() too, depends on the precision you want

  if (currentMicros - previousMicros >= 1000000ul) { // 1s in µs
    unsigned long deltaT = currentMicros - previousMicros; // that will be give or take 1s
    digitalWrite(CTSPin, HIGH);     // CTS Open
    digitalWrite(RSPin, HIGH);      // RS
    delayMicroseconds(50);
    digitalWrite(RSPin, LOW);       //RS

    if (Get_data()) {               //Read the Serial bytes coming in
      float currentValue = DMM_ARRAY[2];
      delayMicroseconds( 200 );
      digitalWrite(CTSPin, LOW);  // CTS Close

      deltaTheta = ((previousValue - currentValue) * 1.113065); // count * 1.113065   ARC SEC / SEC

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(deltaTheta / (deltaT / 1000000.0)); //3 decimal place values

      lcd.setCursor(0, 1);
      lcd.print(DMM_ARRAY[2]);// Print btye 3 (LSB)
      previousValue = currentValue;
      previousMicros = currentMicros;
    } else digitalWrite(CTSPin, LOW);  // CTS Close
  }
}

(typed here from your code, fully untested)