1 You have an Arduino UNO R3 a Shiftbrite RGB LED a 4 x 4 Ma

1. You have an Arduino UNO R3, a Shiftbrite RGB LED, a 4 x 4 Matrix keypad, and a SparkFun MMA8452Q Accelerometer. Write the code to make to work together and show the connection diagram.

Solution

#include<p18f4520.h>
#include<delays.h>
#pragma config OSC=HS,WDT=OFF,FCMEN=ON,XINST=OFF,IESO=OFF,LVP=OFF

#define HIGH 1
#define LOW 0
#define R1 PORTBbits.RB0
#define R2 PORTBbits.RB1
#define R3 PORTBbits.RB2
#define R4 PORTBbits.RB3
#define C1 PORTBbits.RB4
#define C2 PORTBbits.RB5
#define C3 PORTBbits.RB6
#define C4 PORTBbits.RB7
#define SEG_EN1 LATCbits.LATC1
#define SEG_EN2 LATCbits.LATC0

/*-----Function Declaration--------*/
void seg_wrt(void);
void update(unsigned char);

unsigned char val = 0;

void main(void)
{
    ADCON1 = 0x0F;
    TRISD = 0x00;
    TRISC = 0x00;
    TRISB = 0xf0;
    LATC = 0x00;
    LATD = 0x00;
    INTCON2bits.RBPU = LOW;    // Enable Weak internal pull-ups in pin RB4 and RB5
    while(1)
    {
        LATB = 0xf0;
        if(C1 == LOW){
            R1 = HIGH;
            if(C1 == HIGH)
                update(16);
            else {
                R2 = HIGH;
                if(C1 == HIGH)
                    update(15);
                else {
                    R3 = HIGH;
                    if(C1 == HIGH)
                        update(14);
                    else update(13);
        }
            }
    }
    if(C2 == LOW){
            R1 = HIGH;
            if(C2 == HIGH)
                update(12);
            else {
                R2 = HIGH;
                if(C2 == HIGH)
                    update(11);
                else{
                    R3 = HIGH;
                    if(C2 == HIGH)
                        update(10);
                    else update(9);
                }
            }
    }
    if(C3 == LOW){
            R1 = HIGH;
            if(C3 == HIGH)
                update(8);
            else {
                R2 = HIGH;
                if(C3 == HIGH)
                    update(7);
                  else{
                    R3 = HIGH;
                    if(C3 == HIGH)
                        update(6);
                    else update(5);
                }
            }
    }
    if(C4 == LOW){
            R1 = HIGH;
            if(C4 == HIGH)
                update(4);
            else {
                R2 = HIGH;
                if(C4 == HIGH)
                    update(3);
                    else{
                        R3 = HIGH;
                        if(C4 == HIGH)
                            update(2);
                        else update(1);
                }
            }
    }
        seg_wrt();
    }   // end of while(1)
}

void update(unsigned char data)
{
    val = data;
}

void seg_wrt() {
    unsigned char lookup[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
    long unit,ten;
    long idx = 0;
    unit = val/10;
    ten = val%10;
    for(idx=0;idx<100; idx++)
    {
        LATD = lookup[unit];
        SEG_EN1 = HIGH;
        Delay10TCYx(10);
        SEG_EN1 = LOW;
        LATD = lookup[ten];
        SEG_EN2 = HIGH;
        Delay10TCYx(10);
        SEG_EN2 = LOW;
    }
}