Question

I need this in assembly language please. Use Dragon12-Light (or Dragon12-Plus2) Evaluation Board and the CodeWarrior IDE to develop the following programs.The first one is to write a program that implements an 8 bit up counter on the 8 LEDs. Increment the counter every second.The second one is to write a program that generates a noise of 500Hz on the speaker on your board.Thank you so much!

Answer 1

Code for the implementation of 8 bit up counter on the 8 LED,

/* source: https://www.electroschematics.com/9809/arduino-8-bit-binary-led/ */
int button = 2;                 // pin to connect the button
int presses = 0;                // variable to store number of presses
long time = 0;                  // used for debounce
long debounce = 100;    // how many ms to "debounce"
const byte numPins = 8; // how many leds
int state;                              // used for HIGH or LOW
 // pins to connect leds
byte pins[] = {5, 6, 7, 8, 9, 10, 11, 12};

void setup()
{
        /* we setup all led pins as OUTPUT */
        for(int i = 0; i < numPins; i++) {
                pinMode(pins[i], OUTPUT);
        }
        pinMode(button, INPUT);
        /* use pin 2 which has interrupt 0 on Arduino UNO */
        attachInterrupt(0, count, LOW);
}

void loop()
{
        /* convert presses to binary and store it as a string */
        String binNumber = String(presses, BIN);
        /* get the length of the string */
        int binLength = binNumber.length();     
        if(presses <= 255) { // if we have less or equal to 255 presses
                // here is the scary code
                for(int i = 0, x = 1; i < binLength; i++, x+=2) { 
                        if(binNumber[i] == '0') state = LOW;
                        if(binNumber[i] == '1') state = HIGH;
                        digitalWrite(pins[i] + binLength - x, state);
                }       
        } else {
                // do something when we reach 255
        }
}

/* function to count the presses */
void count() { 
        // we debounce the button and increase the presses
        if(millis() - time > debounce)       presses++;
        time = millis();
}