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MEGA2560_Clock.ino
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MEGA2560_Clock.ino
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/*
* This code has a one second timer using
* the bool variable flag to indicate one
* second has elapsed, and will continue
* to do so.
*
*/
/*
* Pin mappings
*
L1 - 50
L2 - 51
L3 - 52
L4 - 53
A - 37
B - 36
C - 35
D - 34
E - 33
F - 32
G - 31
Dp - 30
button1 - 21
button2 - 20
button3 - 19
button4 - 18
*/
/*
* ============== Making numbers that don't change human readable ===============
*/
// Making pin numbers human readable
#define selectA 50
#define selectB 51
#define selectC 52
#define selectD 53
// Making pin numbers human readable
#define button1 21
#define button2 20
#define button3 19
#define button4 18
// Making mode select number human readable
#define INC_MODE 0
#define DEC_MODE 1
#define DIA_MODE 2
#define INT_MODE 3
// For testing, setting this will allow
// you to work on a single componet.
// We'll hook this up to a button also
static int MODE = 0;
/*
* ============== Creating our characters and select line arrays ===============
*/
/* A
* F B
* G
* E C
* D Dp
*
*
*
*
* 8 7654321
* 0b(Dp)GFEDCBA
*
* MUST MAKE BIT ZERO
* TO TURN ON LED.
*/
// D
// pGFEDCBA
const char characters[16]= { (char)0b11000000, //0
(char)0b11111001, //1
(char)0b10100100, //2
(char)0b10110000, //3
(char)0b10011001, //4
(char)0b10010010, //5
(char)0b10000010, //6
(char)0b11111000, //7
(char)0b10000000, //8
(char)0b10010000, //9
(char)0b10001000, //A
(char)0b10000011, //B
(char)0b11000110, //C
(char)0b10100001, //D
(char)0b10000110, //E
(char)0b10001110 //F
};
const char displays[] = { selectA,
selectB,
selectC,
selectD };
/*
* ============== Our global variables we want to use the whole life span of the program ===============
*/
// Setting constant for one second
// Doing math on this number can give
// you any timer delay you want
//
// The timer delay is calculated using
// the speed of the microcontroller
// and the programmed prescaler.
// To get more precision or ability
// for longer delays, modify formula:
// 3036 = 65536 - (16MHz/256/1Hz)
// http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf
const int tcnt_one_second = 3036;
// The internal interrupt will count to Timer_one_second
// and set the boolean variable 'flag' to true
const int Timer_one_second = tcnt_one_second;
bool flag;
// We dont want to change Timer_one_second,
// instead we want a variable we can change
// by doing math on Timer_one_second
int tick_rate;
// This is how long each 7 seg display will be on
int pulse_delay_ms;
// We can change the number we count up to by
// changing radixCeiling
int radixCeiling;
// Variables to hold the hexadecimal character being displayed
int ones;
int tens;
int hundreds;
int thousands;
// Are we currently counting?
bool bCounting;
// Variables to hold the bit patterns to use in interface mode
int i_ones;
int i_tens;
int i_hundreds;
int i_thousands;
// For use to detect when a button is pressed
bool bButton1;
bool bButton2;
bool bButton3;
bool bButton4;
// Aqeel's code
int A = 37; // __A__
int B = 36; // | |
int C = 35; // F B
int D = 34; // |__G__|
int E = 33; // | |
int F = 32; // E C
int G = 31; // |__D__|
int DP = 30; // *DP
int state = 0;
int delaytime = 500;
// Aqeel's code
/*
* ============== ===============
*/
void loop()
{
/*
*
*
* Button 1 is connected to pin 21
* Button 2 is connected to pin 22
* Button 3 is connected to pin 23
* Button 4 is connected to pin 24
*
* When the button X goes from HIGH to LOW:
* bButtonX becomes true
* When the button X goes from LOW to HIGH:
* bButtonX becomes false
*
* We can copy and paste the below block of code in
* to So if
* you want the buttons to function differently
* depending on if we are in INCREMENT mode or
* DIAGNOSTIC mode, we can just specify
*
*/
/*
* ============== Incrementing from 0 to radixCeiling ===============
*/
if(MODE == INC_MODE)
{
if(bButton1)
{
Serial.print("INC_BUTTON - ");
Serial.println(button1 - 20);
// Diagnostics mode
MODE = 2;
bButton1 = false;
}
if(bButton2)
{
Serial.print("INC_BUTTON - ");
Serial.println(button2 - 20);
bCounting = !bCounting;
bButton2 = false;
}
if(bButton3)
{
Serial.print("INC_BUTTON - ");
Serial.println(button3 - 20);
ones = 0;
tens = 0;
hundreds = 0;
thousands = 0;
bButton3 = false;
}
if(bButton4)
{
Serial.print("INC_BUTTON - ");
Serial.println(button4 - 20);
MODE = DEC_MODE;
bButton4 = false;
}
updatePortValues(characters[ones]);
pulseSelectLine(selectD, pulse_delay_ms);
if((tens != 0) || (hundreds > 0 || thousands > 0))
{
updatePortValues(characters[tens]);
pulseSelectLine(selectC, pulse_delay_ms);
}
if((hundreds > 0) || thousands > 0)
{
updatePortValues(characters[hundreds]);
pulseSelectLine(selectB, pulse_delay_ms);
}
if(thousands > 0)
{
updatePortValues(characters[thousands]);
pulseSelectLine(selectA, pulse_delay_ms);
}
if(flag)
{
if(bCounting)
{
flag = false;
ones++;
if(ones > radixCeiling)
{
ones = 0;
tens++;
}
if(tens > radixCeiling)
{
tens = 0;
hundreds++;
}
if(hundreds > radixCeiling)
{
hundreds = 0;
thousands++;
}
if(thousands > radixCeiling)
{
thousands = 0;
}
}
}
}
/*
* ============== Decrementing from radixCeiling to 0 ===============
*/
else if(MODE == DEC_MODE)
{
if(bButton1)
{
Serial.print("DEC_BUTTON - ");
Serial.println(button1 - 20);
// Diagnostics mode
MODE = 2;
bButton1 = false;
}
if(bButton2)
{
Serial.print("DEC_BUTTON - ");
Serial.println(button2 - 20);
bCounting = !bCounting;
bButton2 = false;
}
if(bButton3)
{
Serial.print("DEC_BUTTON - ");
Serial.println(button3 - 20);
ones = 0;
tens = 0;
hundreds = 0;
thousands = 0;
bButton3 = false;
}
if(bButton4)
{
Serial.print("DEC_BUTTON - ");
Serial.println(button4 - 20);
MODE = INC_MODE;
bButton4 = false;
}
updatePortValues(characters[ones]);
pulseSelectLine(selectD, pulse_delay_ms);
if((tens != 0) || (hundreds > 0 || thousands > 0))
{
updatePortValues(characters[tens]);
pulseSelectLine(selectC, pulse_delay_ms);
}
if((hundreds > 0) || thousands > 0)
{
updatePortValues(characters[hundreds]);
pulseSelectLine(selectB, pulse_delay_ms);
}
if(thousands > 0)
{
updatePortValues(characters[thousands]);
pulseSelectLine(selectA, pulse_delay_ms);
}
if(flag)
{
if(bCounting)
{
flag = false;
if(ones == 0)
{
ones = radixCeiling;
tens--;
}
else
{
ones--;
}
if(tens < 0)
{
tens = radixCeiling;
hundreds--;
}
if(hundreds < 0)
{
hundreds = radixCeiling;
thousands--;
}
if(thousands < 0)
{
thousands = radixCeiling;
}
}
}
}
/*
* ============== Implementing three different diagnostic tests ===============
*
* You can edit the title and anything in the section below
*/
else if(MODE == DIA_MODE)
{
updatePortValues(characters[13]);
pulseSelectLine(selectB, pulse_delay_ms);
updatePortValues(0b11101111);
pulseSelectLine(selectC, pulse_delay_ms);
updatePortValues(characters[10]);
pulseSelectLine(selectD, pulse_delay_ms);
// Go back to INC/DEC (MODE SELECT)
if(bButton1)
{
Serial.print("DIA_BUTTON - ");
Serial.println(button1 - 20);
if(MODE == 1)
{
MODE = 0;
}
else
{
MODE = 1;
}
bButton1 = false;
}
// TEST 1
if(bButton2)
{
Serial.print("DIA_BUTTON - ");
Serial.println(button2 - 20);
// doStuff
diag1();
// Go back to INC/DEC (MODE SELECT)
if(MODE == 1)
{
MODE = 0;
}
else
{
MODE = 1;
}
bButton2 = false;
}
// TEST 2
if(bButton3)
{
Serial.print("DIA_BUTTON - ");
Serial.println(button3 - 20);
// doStuff
diag2();
// Go back to INC/DEC (MODE SELECT)
if(MODE == 1)
{
MODE = 0;
}
else
{
MODE = 1;
}
bButton3 = false;
}
// TEST 3
if(bButton4)
{
Serial.print("DIA_BUTTON - ");
Serial.println(button4 - 20);
// doStuff
diag3();
// Go back to INC/DEC (MODE SELECT)
if(MODE == 1)
{
MODE = 0;
}
else
{
MODE = 1;
}
bButton4 = false;
}
}
/*
* ============== Implementing three different diagnostic tests ===============
*
* End diagnostics block
*/
/*
* ============== Interface mode. Allows display to be completly controlled by serial communication ===============
*/
else if(MODE == INT_MODE)
{
updatePortValues(i_ones);
pulseSelectLine(selectD, pulse_delay_ms);
updatePortValues(i_tens);
pulseSelectLine(selectC, pulse_delay_ms);
updatePortValues(i_hundreds);
pulseSelectLine(selectB, pulse_delay_ms);
updatePortValues(i_thousands);
pulseSelectLine(selectA, pulse_delay_ms);
}
// Let's check to see if we have a interface command
checkInterface();
}
char segA = 0b11111110;
char segB = 0b11111101;
char segC = 0b11111011;
char segD = 0b11110111;
char segE = 0b11101111;
char segF = 0b11011111;
char segG = 0b10111111;
char segDp= 0b01111111;
// Interface command parsing
void checkInterface()
{
if(Serial.available())
{
selectPinsOff();
allSegmentsOff();
char command = Serial.read();
if(command == 32)
{
MODE = INT_MODE;
i_ones = 0;
i_tens = 0;
i_hundreds = 0;
i_thousands = 0;
}
else if(command == 33)
{
MODE = INT_MODE;
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
}
else if(command == 34)
{
diag1();
}
else if(command == 35)
{
diag2();
}
else if(command == 36)
{
diag3();
}
else if(command == 37)
{
MODE = INC_MODE;
}
else if(command == 38)
{
MODE = DEC_MODE;
}
else if(command == 39)
{
bCounting = !bCounting;
}
else if(command == 40)
{
ones = 0;
tens = 0;
hundreds = 0;
thousands = 0;
}
else if(command == 'a')
{
i_ones = segA;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'b')
{
i_ones = segB;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'c')
{
i_ones = segC;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'd')
{
i_ones = segD;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'e')
{
i_ones = segE;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'f')
{
i_ones = segF;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'g')
{
i_ones = segG;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'h')
{
i_ones = segDp;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'i')
{
i_ones = 255;
i_tens = segA;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'j')
{
i_ones = 255;
i_tens = segB;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'k')
{
i_ones = 255;
i_tens = segC;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'l')
{
i_ones = 255;
i_tens = segD;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'm')
{
i_ones = 255;
i_tens = segE;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'n')
{
i_ones = 255;
i_tens = segF;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'o')
{
i_ones = 255;
i_tens = segG;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'p')
{
i_ones = 255;
i_tens = segDp;
i_hundreds = 255;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'q')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segA;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'r')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segB;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 's')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segC;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 't')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segD;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'u')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segE;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'v')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segF;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'w')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segG;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'x')
{
i_ones = 255;
i_tens = 255;
i_hundreds = segDp;
i_thousands = 255;
MODE = INT_MODE;
}
else if(command == 'y')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segA;
MODE = INT_MODE;
}
else if(command == 'z')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segB;
MODE = INT_MODE;
}
else if(command == '{')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segC;
MODE = INT_MODE;
}
else if(command == '|')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segD;
MODE = INT_MODE;
}
else if(command == '}')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segE;
MODE = INT_MODE;
}
else if(command == '~')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segF;
MODE = INT_MODE;
}
else if(command == '^')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segG;
MODE = INT_MODE;
}
else if(command == '_')
{
i_ones = 255;
i_tens = 255;
i_hundreds = 255;
i_thousands = segDp;
MODE = INT_MODE;
}
}
}
/*
* ============== Setup Code ===============
*
* We can review this if you need
*/
void setup() {
Serial.begin(9600);
while(!Serial){}
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
bButton1 = false;
bButton2 = false;
bButton3 = false;
bButton4 = false;
tick_rate = Timer_one_second;
radixCeiling = 15;
pulse_delay_ms = 3;
flag = false;
ones = 0;
tens = 0;
hundreds = 0;
thousands = 0;
bCounting = true;
i_ones = 0b11111110;
i_tens = 255;
i_hundreds = 255;
i_thousands = 255;
initPorts();
initSelectPins();
initButtons();
initButtonInterrupts();
MODE = INC_MODE;
// Last, due to it enables global interrupts at the end
initTimer();
}
// Turn the pin 'select' HIGH for the
// pulse_delay_ms length of time, then
// turns 'select' back to LOW
//
void pulseSelectLine(int select, int ms)
{
digitalWrite(select, HIGH);
delay(ms);
digitalWrite(select, LOW);
}
// In one, very, very efficient swoop,
// we essentially assign:
// PORTC[0] = character[0]
// PORTC[1] = character[1]
// PORTC[2] = character[2]
// PORTC[3] = character[3]
// PORTC[4] = character[4]
// PORTC[5] = character[5]
// PORTC[6] = character[6]
// PORTC[7] = character[7]
void updatePortValues(char character)
{
PORTC = character;
}
// Interrupt vector triggered by TIMER1
ISR(TIMER1_OVF_vect) // interrupt service routine that wraps a user defined function supplied by attachInterrupt
{
// Update the tick_rate here incase
// we speed up or slow down the clock
TCNT1 = tick_rate; // preload timer
flag = true;
}
// Good thing for datasheets and people smarter than I
void initTimer()
{
// http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet.pdf
char cSREG;