Question

Using the parity bit, port b is to flash in a pattern of Odd Numbered LEDs On and Even Numbered LEDS Off for 1 second, and then Odd Numbered LEDs Off and Even Numbered LEDS On for 1 second. This pattern will repeat indefinitely. Please provide the both the assembly code for MPLAB and a flow chart. Note - consider delay calculations and port B initialization have already been completed.

Answer 1

code for pattern:

//LED Pin Variables
int ledPins[] = {2,3,4,5,6,7,8,9}; //An array to hold the pin each LED is connected to
//i.e. LED #0 is connected to pin 2, LED #1, 3 and so on
//to address an array use ledPins[0] this would equal 2
//and ledPins[7] would equal 9

int lightModulo = 0; // for which modulo to light

/*
* setup() - this function runs once when you turn your Arduino on
* We the three control pins to outputs
*/
void setup()
{
  
//Set each pin connected to an LED to output mode (pulling high (on) or low (off)
for(int i = 0; i < 8; i++){ //this is a loop and will repeat eight times
pinMode(ledPins[i],OUTPUT); //we use this to set each LED pin to output
} //the code this replaces is below
  
Serial.begin(9600);
}


/*
* loop() - this function will start after setup finishes and then repeat
* we call a function called oneAfterAnother(). if you would like a different behaviour
* uncomment (delete the two slashes) one of the other lines
*/
void loop() // run over and over again
{
turnOnEvenOdd();
}

// turn on even LEDs, then odd LEDs.
// nice to have them set up as yellow/red
void turnOnEvenOdd() {
int delayTime = 250;
  
// print desired modulo.
Serial.println(lightModulo);
  
for (int i = 0; i < 8; i++) {
if ((i % 2) == lightModulo) {
// on
// when desired modulo is 1 (odd), odds will light
// when desired modulo is 0 (even), evens will light
digitalWrite(ledPins[i], HIGH);
} else {
// off
// ...and the others will be turned off
digitalWrite(ledPins[i], LOW);
}
}
  
// switch lightModulo to the other light
lightModulo--; // decrease. 1 turns to 0, 0 turns to -1
lightModulo = abs(lightModulo); // when it's -1 (from 0), abs to 1
  
delay(delayTime);
}