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#include "xc.h"
#include "numpad.h"
void initKeyPad(void) {
AD1PCFG = 0x9fff; //sets all pins to digital I/O
TRISA = 0b0000000000011111; //set port A to inputs,
TRISB = 0b0000000000000011; //and port B to outputs
LATA = 0xFFFF; //Set all of port A to HIGH
LATB = 0xF000; //Set RB12-15 to high, no touch rest of RB
CNPU1bits.CN2PUE = 1; //RA0
CNPU1bits.CN3PUE = 1; //RA1
CNPU2bits.CN30PUE = 1; //RA2
CNPU2bits.CN29PUE = 1; //RA3
T1CON = 0;
PR1 = 15999;
TMR1 = 0;
IFS0bits.T1IF = 0;
T1CONbits.TON = 1;
}
void padDelay(long n) {
for (n = n; n > 0; n--) {
asm("nop");
}
}
// 1 2 3 4 5 6 7 8
// RA0 RA1 RA2 RA3 RB15 RB14 RB13 RB12
char cycle() {
int i = 0;
char key = 'N';
while (i < 4) {
if (i == 0) {
LATBbits.LATB12 = 0;
LATBbits.LATB13 = 1;
LATBbits.LATB14 = 1;
LATBbits.LATB15 = 1;
} else if (i == 1) {
LATBbits.LATB12 = 1;
LATBbits.LATB13 = 0;
LATBbits.LATB14 = 1;
LATBbits.LATB15 = 1;
} else if (i == 2) {
LATBbits.LATB12 = 1;
LATBbits.LATB13 = 1;
LATBbits.LATB14 = 0;
LATBbits.LATB15 = 1;
} else if (i == 3) {
LATBbits.LATB12 = 1;
LATBbits.LATB13 = 1;
LATBbits.LATB14 = 1;
LATBbits.LATB15 = 0;
}
key = readKeyPadRAW();
if (key != 'N') {
return key;
}
i++;
}
return key;
}
char readKeyPadRAW(void) {
if ((PORTAbits.RA0 || LATBbits.LATB12) == 0) {
return 'A';
} else if ((PORTAbits.RA1 || LATBbits.LATB12) == 0) {
return '3';
} else if ((PORTAbits.RA2 || LATBbits.LATB12) == 0) {
return '2';
} else if ((PORTAbits.RA3 || LATBbits.LATB12) == 0) {
return '1';
} else if ((PORTAbits.RA0 || LATBbits.LATB13) == 0) {
return 'b';
} else if ((PORTAbits.RA1 || LATBbits.LATB13) == 0) {
return '6';
} else if ((PORTAbits.RA2 || LATBbits.LATB13) == 0) {
return '5';
} else if ((PORTAbits.RA3 || LATBbits.LATB13) == 0) {
return '4';
} else if ((PORTAbits.RA0 || LATBbits.LATB14) == 0) {
return 'C';
} else if ((PORTAbits.RA1 || LATBbits.LATB14) == 0) {
return '9';
} else if ((PORTAbits.RA2 || LATBbits.LATB14) == 0) {
return '8';
} else if ((PORTAbits.RA3 || LATBbits.LATB14) == 0) {
return '7';
} else if ((PORTAbits.RA0 || LATBbits.LATB15) == 0) {
return 'd';
} else if ((PORTAbits.RA1 || LATBbits.LATB15) == 0) {
return 'F';
} else if ((PORTAbits.RA2 || LATBbits.LATB15) == 0) {
return '0';
} else if ((PORTAbits.RA3 || LATBbits.LATB15) == 0) {
return 'E';
} else {
return 'N';
}
}
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