archive code for AstroClock
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Firmware/Astroclock.ino
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316
Firmware/Astroclock.ino
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#include <Arduino.h>
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#include <TM1637Display.h>
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#include <TinyGPS++.h>
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#include <SoftwareSerial.h>
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//display pins
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#define CLK 8
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#define DIO 9
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//varibles to calculate LST
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double M,Y,D,MN,H,S,A,B;
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double LST_hours,LST_degrees;
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//define GPS pins and The serial connection to the GPS device
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static const int RXPin = 3, TXPin = 2;
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static const uint32_t GPSBaud = 9600;
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TinyGPSPlus gps;
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SoftwareSerial ss(RXPin, TXPin);
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int gpsOld = gps.time.minute();
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//define 7-digit display pins
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TM1637Display display(CLK, DIO);
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//----------------------8x8 matrix display--------------------
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int INTENSITYMIN = 0; // minimum brightness, valid range [0,15]
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int INTENSITYMAX = 8; // maximum brightness, valid range [0,15]
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int DIN_PIN = 4; // data in pin
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int CS_PIN = 5; // load (CS) pin
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int CLK_PIN = 6; // clock pin
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// MAX7219 registers
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byte MAXREG_DECODEMODE = 0x09;
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byte MAXREG_INTENSITY = 0x0a;
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byte MAXREG_SCANLIMIT = 0x0b;
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byte MAXREG_SHUTDOWN = 0x0c;
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byte MAXREG_DISPTEST = 0x0f;
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//----------------------Moon phases--------------------------
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unsigned char fullMoon[] =
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{
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B00111100,
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B01111110,
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B11111111,
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B11111111,
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B11111111,
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B11111111,
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B01111110,
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B00111100
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};
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const unsigned char newMoon[] =
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{
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B00111100,
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B01000010,
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B10000001,
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B10000001,
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B10000001,
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B10000001,
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B01000010,
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B00111100
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};
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const unsigned char firstQuarter[] =
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{
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B00001100,
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B00001110,
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B00001111,
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B00001111,
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B00001111,
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B00001111,
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B00001110,
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B00001100
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};
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const unsigned char thirdQuarter[] =
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{
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B00110000,
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B01110000,
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B11110000,
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B11110000,
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B11110000,
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B11110000,
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B01110000,
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B00110000
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};
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const unsigned char waningCrescent[] =
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{
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B00111100,
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B01110000,
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B11100000,
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B11100000,
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B11100000,
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B11100000,
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B01110000,
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B00111100
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};
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const unsigned char waxingCrescent[] =
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{
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B00111100,
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B00001110,
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B00000111,
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B00000111,
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B00000111,
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B00000111,
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B00001110,
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B00111100
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};
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unsigned char waxingGibbous[] =
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{
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B00111100,
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B01011110,
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B10111111,
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B10111111,
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B10111111,
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B10111111,
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B01011110,
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B00111100
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};
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unsigned char waningGibbous[] =
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{
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B00111100,
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B01111010,
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B11111101,
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B11111101,
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B11111101,
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B11111101,
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B01111010,
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B00111100
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};
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//-----------------------------------------------------------
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void setup() {
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Serial.begin(115200); //Serial communication
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ss.begin(GPSBaud); //Serial communication for GPS
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pinMode(DIN_PIN, OUTPUT);
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pinMode(CLK_PIN, OUTPUT);
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pinMode(CS_PIN, OUTPUT);
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// initialization of the MAX7219
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setRegistry(MAXREG_SCANLIMIT, 0x07);
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setRegistry(MAXREG_DECODEMODE, 0x00); // using an led matrix (not digits)
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setRegistry(MAXREG_SHUTDOWN, 0x01); // not in shutdown mode
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setRegistry(MAXREG_DISPTEST, 0x00); // no display test
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setRegistry(MAXREG_INTENSITY, 0x0f & INTENSITYMAX);
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}
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void loop() {
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smartDelay(0);
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display.setBrightness(0x0f);
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if(gps.time.minute()!=gpsOld){
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LST_time();
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int rHours =(int) LST_hours;
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int rMinutes = ((int)floor((LST_hours-rHours)*60));
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display.clear(); //reset display
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display.showNumberDecEx(((rHours*100)+rMinutes),0b01000000,true,4,0);
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int moonAge = ConwayMoon(gps.date.year(),gps.date.month(),gps.date.day());
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drawMoon(moonAge); //draw the moon to 8x8 display
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gpsOld = gps.time.minute();
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//Serial print for debuging
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/*
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Serial.print("UTC: ");
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Serial.print(gps.time.hour());
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Serial.print(":");
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Serial.println(gps.time.minute());
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Serial.print("Sidereal: ");
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Serial.println(LST_hours);
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Serial.print("Moon age: ");
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Serial.println(moonAge);
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*/
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}
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}
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//smart delay for GPS
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static void smartDelay(unsigned long ms){
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unsigned long start = millis();
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do
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{
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while (ss.available())
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gps.encode(ss.read());
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} while (millis() - start < ms);
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}
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void LST_time(){
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//Calculates local sidereal time based on this calculation,
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//http://www.stargazing.net/kepler/altaz.html
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M = (double) gps.date.month();
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Y = (double) gps.date.year();
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D = (double) gps.date.day();
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MN = (double) gps.time.minute();
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H = (double) gps.time.hour();
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S = (double) gps.time.second();
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A = (double)(Y-2000)*365.242199;
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B = (double)(M-1)*30.4368499;
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double JDN2000=A+B+(D-1)+gps.time.hour()/24;
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double decimal_time = H+(MN/60)+(S/3600) ;
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double LST = 100.46 + 0.985647 * JDN2000 + gps.location.lng() + 15*decimal_time;
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LST_degrees = (LST-(floor(LST/360)*360));
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LST_hours = LST_degrees/15;
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}
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void setRegistry(byte reg, byte value){
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digitalWrite(CS_PIN, LOW);
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putByte(reg); // specify register
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putByte(value); // send data
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digitalWrite(CS_PIN, LOW);
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digitalWrite(CS_PIN, HIGH);
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}
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void putByte(byte data){
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byte i = 8;
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byte mask;
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while (i > 0)
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{
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mask = 0x01 << (i - 1); // get bitmask
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digitalWrite( CLK_PIN, LOW); // tick
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if (data & mask) // choose bit
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digitalWrite(DIN_PIN, HIGH); // send 1
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else
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digitalWrite(DIN_PIN, LOW); // send 0
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digitalWrite(CLK_PIN, HIGH); // tock
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--i; // move to lesser bit
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}
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}
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int ConwayMoon(int cYear,int cMonth,int cDay){
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int s;
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int yy;
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int d;
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s = cYear % 100;
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s = s % 19;
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if (s>9){
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s -= 19;
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}
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s = ((s * 11) % 30) + cMonth + cDay;
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if (cMonth<3){
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s += 2;
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}
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s = ((int)floor(s-7.8))%30;
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if(s<0){
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s = s+30;
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}
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return s;
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}
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int drawMoon(int s){
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//drawing the moon
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switch (s) {
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case 0: case 1: case 29:
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// New moon
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,newMoon[i]);
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}
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break;
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case 2: case 3: case 4: case 5: case 6:
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// waxing crescent
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,waxingCrescent[i]);
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}
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break;
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case 7: case 8:
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// first quarter
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,firstQuarter[i]);
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}
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break;
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case 9: case 10: case 11: case 12: case 13:
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// waxing gibbous
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,waxingGibbous[i]);
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}
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break;
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case 14: case 15: case 16:
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// full moon
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,fullMoon[i]);
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}
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break;
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case 17: case 18: case 19: case 20: case 21:
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// waning gibbous
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,waningGibbous[i]);
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}
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break;
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case 22: case 23:
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// third quarter
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,thirdQuarter[i]);
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}
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break;
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case 24: case 25: case 26: case 27: case 28:
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// waning crescent
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for (int i = 0; i < 8; i++){
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setRegistry(i+1,waningCrescent[i]);
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}
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default:
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// empty moon
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break;
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}
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}
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