Hello
I'm very new to this, and would greatly appreciate your thoughts...
I am trying to get 4 LEDs to change in brightness with each change in minute (The work is for an art installation, and the brightnesses have been specifically chosen). I am using the DeadOn RTC Breakout.
I started with the sketch from the SparkFun DS3234 Arduino Library (DSC3234_RTC_Demo.ino), and added/subtracted to get to the following:
#include <SPI.h>
#include <SparkFunDS3234RTC.h>
#define DS13074_CS_PIN 10 // DeadOn RTC Chip-select pin
const int panel1Pin = 3;
const int panel2Pin = 5;
const int panel3Pin = 6;
const int panel4Pin = 9;
int digit1 = 0; //integer for first digit of hour
int digit2 = 0; //integer for second digit of hour
int digit3 = 0; //integer for first digit of minute
int digit4 = 0; //integer for second digit of minute
int segmentCount[] = {6, 2, 5, 5, 4, 5, 6, 3, 7, 6}; //number of segments in digits 0 - 9
int segmentDigit1 = 0; //number of segments in digit 1
int segmentDigit2 = 0; //number of segments in digit 2
int segmentDigit3 = 0; //number of segments in digit 3
int segmentDigit4 = 0; //number of segments in digit 4
/*
* intensity values for number of segments lit are either mathematically accurate (255/7) or
* based upon visual clarity
*/
int intensityCount[] = {0, 36, 73, 109, 146, 182, 219, 255}; //mathematically accurate
// int intensityCount[] = {0, 0, 5, 15, 35, 75, 140, 255}; //visual clarity
int panelIntensity1 = 0;
int panelIntensity2 = 0;
int panelIntensity3 = 0;
int panelIntensity4 = 0;
void setup()
{
// Use the serial monitor to view time/date output
Serial.begin(9600);
// Call rtc.begin([cs]) to initialize the library
// The chip-select pin should be sent as the only parameter
rtc.begin(DS13074_CS_PIN);
rtc.setTime(0, 8, 7, 7, 22, 9, 18);
}
void loop()
{
static int8_t lastMinute = -1;
// Call rtc.update() to update all rtc.seconds(), rtc.minutes(),
// etc. return functions.
rtc.update();
if (rtc.minute() != lastMinute) // If the minute has changed
{
printTime(); // Print the new time
printDigit(); // Print the individual digit values
printIntensity(); // Print the lamp intensity for each digit
lightLamp(); // Send PWM data to LEDs
lastMinute = rtc.minute(); // Update lastMinute value
}
}
void printTime()
{
Serial.print(String(rtc.hour()) + ":"); // Print hour
if (rtc.minute() < 10)
Serial.print('0'); // Print leading '0' for minute
Serial.print(String(rtc.minute()) + ":"); // Print minute
if (rtc.second() < 10)
Serial.print('0'); // Print leading '0' for second
Serial.println(String(rtc.second())); // Print second
}
void printDigit()
{
if (rtc.hour() < 10) //digit 1
digit1 = 0;
else if (rtc.hour() >= 10)
digit1 = (rtc.hour() / 10);
digit2 = (rtc.hour() % 10); //digit 2
if (rtc.minute() < 10) //digit 3
digit3 = 0;
else if (rtc.minute() >= 10)
digit3 = (rtc.minute() / 10);
digit4 = (rtc.minute() % 10); //digit 4
Serial.print(digit1);
Serial.print("|");
Serial.print(digit2);
Serial.print("|");
Serial.print(digit3);
Serial.print("|");
Serial.print(digit4);
Serial.println("|");
}
void printIntensity()
{
// identify number of segments in each digit
segmentDigit1 = segmentCount[digit1];
segmentDigit2 = segmentCount[digit2];
segmentDigit3 = segmentCount[digit3];
segmentDigit4 = segmentCount[digit4];
//identify intensity for number of segments
panelIntensity1 = intensityCount[segmentDigit1];
panelIntensity2 = intensityCount[segmentDigit2];
panelIntensity3 = intensityCount[segmentDigit3];
panelIntensity4 = intensityCount[segmentDigit4];
Serial.print(panelIntensity1);
Serial.print("|");
Serial.print(panelIntensity2);
Serial.print("|");
Serial.print(panelIntensity3);
Serial.print("|");
Serial.print(panelIntensity4);
Serial.println("|");
}
void lightLamp()
{
analogWrite(panel1Pin, panelIntensity1);
analogWrite(panel2Pin, panelIntensity2);
analogWrite(panel3Pin, panelIntensity3);
analogWrite(panel4Pin, panelIntensity4);
}
I have also attached an image of the circuit.
When it works, it works well! But it flips out from time to time, and will either stick in the occasional unexpected result, or start streaming unexpected results:
9:57:00
0|9|5|7|
219|219|182|109|
9:58:00
0|9|5|8|
219|219|182|255|
9:59:00
0|9|5|9|
219|219|182|219|
10:00:00
1|0|0|0|
73|219|219|219|
4:40:00 This is where it starts going wrong (for example)
0|4|4|0|
219|146|146|219|
10:00:01
1|0|0|0|
73|219|219|219|
Does anyone have any idea what I have done wrong?
Thanks in advance for any help you can give.
Best wishes
Rav
