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#include "xc.h"
#include "numpad.h"
#include "display.h"
// CW1: FLASH CONFIGURATION WORD 1 (see PIC24 Family Reference Manual 24.1)
#pragma config ICS = PGx1 // Comm Channel Select (Emulator EMUC1/EMUD1 pins are shared with PGC1/PGD1)
#pragma config FWDTEN = OFF // Watchdog Timer Enable (Watchdog Timer is disabled)
#pragma config GWRP = OFF // General Code Segment Write Protect (Writes to program memory are allowed)
#pragma config GCP = OFF // General Code Segment Code Protect (Code protection is disabled)
#pragma config JTAGEN = OFF // JTAG Port Enable (JTAG port is disabled)
// CW2: FLASH CONFIGURATION WORD 2 (see PIC24 Family Reference Manual 24.1)
#pragma config I2C1SEL = PRI // I2C1 Pin Location Select (Use default SCL1/SDA1 pins)
#pragma config IOL1WAY = OFF // IOLOCK Protection (IOLOCK may be changed via unlocking seq)
#pragma config OSCIOFNC = ON // Primary Oscillator I/O Function (CLKO/RC15 functions as I/O pin)
#pragma config FCKSM = CSECME // Clock Switching and Monitor (Clock switching is enabled,
// Fail-Safe Clock Monitor is enabled)
#pragma config FNOSC = FRCPLL // Oscillator Select (Fast RC Oscillator with PLL module (FRCPLL))
#define NOKEY 255
void delay(long d) {
for (d=d; d > 0; d--) {
asm("nop");
}
}
char cycle();
//============================================================================//
int main(void) {
init7seg();
initKeyPad();
char key = 'N';
char right, left;
int debounce = 250;
//RB<9:2> will drive the cathodes of the seven-segment display
//RB<11:10> will drive the right and left anodes respectively
//RA<3:0> will drive inputs of keypad
//RB<15:12> will cycle to sense RA inputs
while (1) {
if (debounce == 0) {
key = cycle();
if (key != 'N') {
left = right;
right = key;
}
debounce = 250;
}
showChar7seg(right, MSB);
delay(500);
showChar7seg(left, LSB);
delay(200);
debounce--;
// while (!IFS0bits.T1IF);
// IFS0bits.T1IF = 0;
}
}
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;
}
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