diff options
Diffstat (limited to 'Lab3.X/numpad.c')
| -rw-r--r-- | Lab3.X/numpad.c | 150 |
1 files changed, 54 insertions, 96 deletions
diff --git a/Lab3.X/numpad.c b/Lab3.X/numpad.c index 455ef19..5c2c924 100644 --- a/Lab3.X/numpad.c +++ b/Lab3.X/numpad.c @@ -1,106 +1,64 @@ #include "xc.h"
+
void initKeyPad(void) {
- TRISA = 0b0000000000011111; //set port A to inputs,
- LATA = 0x0000; //Set all of port A to LOW
- CNPU1bits.CN11PUE = 1;
- CNPU1bits.CN12PUE = 1;
- CNPU1bits.CN13PUE = 1;
- CNPU1bits.CN14PUE = 1;
+ 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");
- }
+ 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 readKeyPadRAW(void) {
- int i;
- char num;
-//0
- num = (_RA0 << 3) | (_RA1 << 2) | (_RA2 << 1) | _RA3;
- LATB |= (0b1111 << 12);
- padDelay(5);
- for (i = 0; i < 4; i++) {
- LATB ^= 0b1 << (15 - i);
- padDelay(10);
- switch (i) {
- case 0:
- switch (num) {
- case 0b1110:
- return 'A';
- break;
- case 0b1101:
- return '3';
- break;
- case 0b1011:
- return '2';
- break;
- case 0b0111:
- return '1';
- break;
- } break;
- case 1:
- switch (num) {
- case 0b1110:
- return 'b';
- break;
- case 0b1101:
- return '6';
- break;
- case 0b1011:
- return '5';
- break;
- case 0b0111:
- return '4';
- break;
- } break;
- case 2:
- switch (num) {
- case 0b1110:
- return 'C';
- break;
- case 0b1101:
- return '9';
- break;
- case 0b1011:
- return '8';
- break;
- case 0b0111:
- return '7';
- break;
- } break;
- case 3:
- switch (num) {
- case 0b1110:
- return 'd';
- break;
- case 0b1101:
- return 'E';
- break;
- case 0b1011:
- return '0';
- break;
- case 0b0111:
- return 'F';
- break;
- } break;
- } //END switch(i);
- LATB |= (0b1111 << 12);
+ 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';
}
- return '\0';
}
-/*
-Outputs<8:5> = 0b0111; // Set Row 1 output Low
-delay(1us); // this delay could be lower, probably 2-3 cycles
-RowOne = Inputs<4:1>; // returns 0b1111 (no buttons pressed in row 1)
-
-Outputs<8:5> = 0b1011; // Set Row 2 output Low
-delay(1us);
-RowTwo = Inputs<4:1>; // returns 0b1101 (the ?6? key was pressed!)
-...
-Outputs<8:5> = 0b1110; // Set Row 4 output Low
-delay(1us);
-RowFour = Inputs<4:1>; // returns 0b1111 (no buttons pressed in row 4)
-
- */
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