Need help in filling the missing lines in the program template provided down below. (Arduino Uno)....
Need help in filling the missing lines in the program template provided down below. (Arduino Uno).
- Using the program template provided, fill in the missing lines in the program which increments an unsigned integer variable when the “pin 2” button is pressed and decrements an unsigned integer variable when the “pin 3” button is pressed. Your program must display the integer variable (modulo 8) on the 7-segment LED display you designed in the previous lab. Once again you should be able to reuse parts of lab 2. (3 points)
Program Template:
// Breadboard using the same pins as used in the code…
int incrButtonPin = 6; // Increment Button Pin
int decrButtonPin = 5; // Decrement Button Pin
int counter = 0; //Keeps track of the current digital value
boolean IncButtonLast = LOW;
boolean IncButtonCurrent = LOW;
boolean DecButtonLast = LOW;
boolean DecButtonCurrent = LOW;
void setup() { // Increment and decrement pins
pinMode(incrButtonPin, INPUT);
pinMode(decrButtonPin, INPUT); // pins used for 7-segment Display
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
// pins used for input to the DAC R2R Ladder
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
}
void LEDDisplay(int count)
{ switch(count) // Each case value also corresponds to the decimal value. Ex) Case 0 is decimal 0 and so on.
{ case 0: digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
digitalWrite(13, HIGH);
break;
case 1: digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, HIGH);
digitalWrite(11, HIGH);
digitalWrite(12, HIGH);
digitalWrite(13, HIGH);
break; //Fill in the missing cases here..
default:
// Display letter 'd'..
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, HIGH);
digitalWrite(13, LOW);
}//switch-case
}//function
void DACInput(int counter2)
{ //This function sets the three pins connected to the R2R ladder input and makes them LOW/HIGH // depending on the current digital(decimal) value displayed on the LED by converting them into // binary (LOW/HIGH) for each pin. //This is nothing related to the LED so no reverse logic is used.
switch(counter2)
{ case 0: // 000 = 0
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
break;
case 1: // 001 = 1
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
break;
case 2: // 010 = 2
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
break;
case 3: // 011 = 3
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
break;
// Fill in the missing cases..
default: // All low
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
}//switch-case
}//DACInput function
boolean waitForINCRButtonPush(boolean lastIncrSwitchState)
{
boolean currentIncrSwitchState = digitalRead(incrButtonPin);
if(lastIncrSwitchState != currentIncrSwitchState) delay(20);
currentIncrSwitchState = digitalRead(incrButtonPin);
return currentIncrSwitchState;
}
boolean waitForDECRButtonPush(boolean lastDecrSwitchState)
{ //This function waits for a button push and also debounces it..
boolean currentDecrSwitchState = digitalRead(decrButtonPin);
if(lastDecrSwitchState != currentDecrSwitchState) delay(20);
currentDecrSwitchState = digitalRead(decrButtonPin);
return currentDecrSwitchState;
}
void loop()
{
//This is waiting for the increment button push and also debounces it..
IncButtonCurrent = waitForINCRButtonPush(IncButtonLast);
if(IncButtonLast == LOW && IncButtonCurrent == HIGH)
{ counter++; //Advancing count by 1 since increment button was pushed.
}
////This is waiting for the decrement button push and also debounces it..
DecButtonCurrent = waitForDECRButtonPush(DecButtonLast);
if(DecButtonLast == LOW && DecButtonCurrent == HIGH)
{ ; //Fill in the missing line: Hint: Decrement what?
if(counter<0)
;//Fill in missing line: Hint: Ensures wrap around back to 7 if decrement occurs at 0
} //Modulo 8 will ensure our values don’t exceed 7 and wrap-around
counter = ; // Fill in missing parts here: Hint: Perform a modulo 8 operation.
//Display values on the 7-segment LED
LEDDisplay(Fill in missing part);
//Set the binary value for each of the three pins connected to the R2R Ladder(DAC).
DACInput(Fill in missing part);
//Current states become the previous states for the next automatic call to the loop()
IncButtonLast = IncButtonCurrent;
DecButtonLast = DecButtonCurrent;
}//loop()
Homework Answers
- I have bold and underlined the answers so it can be easy for you to spot:
// Breadboard using the same pins as used in the code…
int incrButtonPin = 6; // Increment Button Pin
int decrButtonPin = 5; // Decrement Button Pin
int counter = 0; //Keeps track of the current digital value
boolean IncButtonLast = LOW;
boolean IncButtonCurrent = LOW;
boolean DecButtonLast = LOW;
boolean DecButtonCurrent = LOW;
void setup() { // Increment and decrement pins
pinMode(incrButtonPin, INPUT);
pinMode(decrButtonPin, INPUT); // pins used for 7-segment Display
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
// pins used for input to the DAC R2R Ladder
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
}
void LEDDisplay(int count)
{ switch(count) // Each case value also corresponds to the decimal value. Ex) Case 0 is decimal 0 and so on.
{ case 0: digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
digitalWrite(13, HIGH);
break;
case 1: digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, HIGH);
digitalWrite(11, HIGH);
digitalWrite(12, HIGH);
digitalWrite(13, HIGH);
break; //Fill in the missing cases here..
case 2: digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, HIGH);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, HIGH);
digitalWrite(13, LOW);
break;
case 3: digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, HIGH);
digitalWrite(12, HIGH);
digitalWrite(13, LOW);
break;
case 4: digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, HIGH);
digitalWrite(11, HIGH);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
break;
case 5: digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, HIGH);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
break;
case 6: digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
break;
case 7: digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, HIGH);
digitalWrite(11, HIGH);
digitalWrite(12, HIGH);
digitalWrite(13, HIGH);
break;
//it use modulo 8 arithmetic so no need for case 8 and case 9
default:
// Display letter 'd'..
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, HIGH);
digitalWrite(13, LOW);
}//switch-case
}//function
void DACInput(int counter2)
{ //This function sets the three pins connected to the R2R ladder input and makes them LOW/HIGH // depending on the current digital(decimal) value displayed on the LED by converting them into // binary (LOW/HIGH) for each pin. //This is nothing related to the LED so no reverse logic is used.
switch(counter2)
{ case 0: // 000 = 0
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
break;
case 1: // 001 = 1
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
break;
case 2: // 010 = 2
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
break;
case 3: // 011 = 3
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
break;
// Fill in the missing cases..
case 4: // 100 = 4
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
break;
case 5: // 101 = 5
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
break;
case 6: // 110 = 6
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
break;
case 7: // 111 = 7
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
break;
default: // All low
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
}//switch-case
}//DACInput function
boolean waitForINCRButtonPush(boolean lastIncrSwitchState)
{
boolean currentIncrSwitchState = digitalRead(incrButtonPin);
if(lastIncrSwitchState != currentIncrSwitchState) delay(20);
currentIncrSwitchState = digitalRead(incrButtonPin);
return currentIncrSwitchState;
}
boolean waitForDECRButtonPush(boolean lastDecrSwitchState)
{ //This function waits for a button push and also debounces it..
boolean currentDecrSwitchState = digitalRead(decrButtonPin);
if(lastDecrSwitchState != currentDecrSwitchState) delay(20);
currentDecrSwitchState = digitalRead(decrButtonPin);
return currentDecrSwitchState;
}
void loop()
{
//This is waiting for the increment button push and also debounces it..
IncButtonCurrent = waitForINCRButtonPush(IncButtonLast);
if(IncButtonLast == LOW && IncButtonCurrent == HIGH)
{ counter++; //Advancing count by 1 since increment button was pushed.
}
////This is waiting for the decrement button push and also debounces it..
DecButtonCurrent = waitForDECRButtonPush(DecButtonLast);
if(DecButtonLast == LOW && DecButtonCurrent == HIGH)
{counter-- ; //Fill in the missing line: Hint: Decrement what?
if(counter<0)
counter=7;//Fill in missing line: Hint: Ensures wrap around back to 7 if decrement occurs at 0
} //Modulo 8 will ensure our values don’t exceed 7 and wrap-around
counter =counter % 8 ; // Fill in missing parts here: Hint: Perform a modulo 8 operation.
//Display values on the 7-segment LED
LEDDisplay(counter);
//Set the binary value for each of the three pins connected to the R2R Ladder(DAC).
DACInput(counter);
//Current states become the previous states for the next automatic call to the loop()
IncButtonLast = IncButtonCurrent;
DecButtonLast = DecButtonCurrent;
}//loop()
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