Microchip Taiwan - 18F4520 如何使用3*3鍵盤 [8-bit PIC® MCU]

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cheiyi

18F4520 如何使用3*3鍵盤

新會員

並接 RA0 (出發往下)
R38 20K 接低
R39 10K 接 K1 K4 K7
R40 20K 接 K2 K5 K8
R41 30K 接 K3 K6 K9

並接 VCC (出發往下)
R43 10K 接 K1 K2 K3
R44 4.7K 接 K4 K5 K6
R45 2.2K 接 K7 K8 K9


AD01   

#include    <p18f4520.h>



void ADInit(void){

    ADCON0 = 0b00000011;

    ADCON1 = 0b00001110;

    ADCON2 = 0b00100010;

}



unsigned char ADProc(void){

unsigned char TEMP=1;

    if (ADRESH > 1*32){ TEMP = 1;}

    if (ADRESH > 2*32){ TEMP = 2;}

    if (ADRESH > 3*32){ TEMP = 3;}

    if (ADRESH > 4*32){ TEMP = 4;}

    if (ADRESH > 5*32){ TEMP = 5;}

    if (ADRESH > 6*32){ TEMP = 6;}

    if (ADRESH > 7*32){ TEMP = 7;}

    if (ADRESH > 250){ TEMP = 8;}

ADCON0bits.GO=1;

    return TEMP;

}



LCD 及主程式

#include    <p18f4520.h>

#include    <delays.h>



unsigned char ADProc (void);

void ADInit(void);



#define        LCD_E    LATAbits.LATA2

#define        LCD_RS    LATDbits.LATD4

#define        LCD_RW    LATDbits.LATD5

#define        LCD_DATA    LATD

void LCDCMD( unsigned char CMD);

void LCDCHAR ( unsigned char DATA);



void LCDCMD( unsigned char CMD){

unsigned char TEMP;

    TEMP = CMD;

    LCD_DATA = ( LCD_DATA & 0b11110000 ) | ( TEMP >> 4);

        LCD_RS = 0;

        LCD_RW = 0;

            Nop();Nop();

        LCD_E = 1;

            Nop();Nop();

        LCD_E = 0;

        //----------------

    LCD_DATA = (LCD_DATA & 0b11110000) | ( TEMP & 0b00001111 ) ;

        LCD_RS = 0;

        LCD_RW = 0;

            Nop();Nop();

        LCD_E = 1;

            Nop();Nop();

        LCD_E = 0;

    Delay10TCYx(16/4 *4);

}



void LCDCHAR ( unsigned char DATA){

unsigned char TEMP;

    TEMP = DATA;

    LCD_DATA = ( LCD_DATA & 0b11110000 ) | ( TEMP >> 4);

        LCD_RS = 1;

        LCD_RW = 0;

            Nop();Nop();

        LCD_E = 1;

            Nop();Nop();

        LCD_E = 0;

        //----------------

    LCD_DATA = (LCD_DATA & 0b11110000) | ( TEMP & 0b00001111 ) ;

        LCD_RS = 1;

        LCD_RW = 0;

            Nop();Nop();

        LCD_E = 1;

            Nop();Nop();

        LCD_E = 0;

    Delay10TCYx(16/4 *4);

}

void Init(void){

        TRISD  = 0b00000000;

        ADCON1 = 0b00001111;

        TRISA  = 0b11111011;

        LCD_RS = 0;

        LCD_RW = 0;

        LCD_E  = 0;

}

void LCDCLEAR(void){

    LCDCMD(0b00000001);

    Delay10KTCYx(16/4 * 5);

}

void main (void){

    unsigned char VAL;

        Init();

    Delay10KTCYx(16/4 *50);    //0.5Sec

        LCDCMD(0b00101000);

        LCDCMD(0b00101000);    //Function Set

        LCDCMD(0b00001110);    //Display On/Off

        LCDCMD(0b00000110);    //Entry Mode

        LCDCMD(0b00010100);    //Cursor



    LCDCLEAR();        //Clear

    ADInit();



while(1){

    Delay10KTCYx(16/4*10);

    VAL = ADProc();

    LCDCMD(0b10000000);

    switch (VAL){

        case 1:

            LCDCHAR(0xFF);

            LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');

            LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');

            break;

        case 2:

            LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');

            LCDCHAR(' ');LCDCHAR(' ');

            break;

        case 3:

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');

            LCDCHAR(' ');

            break;

        case 4:

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');

            break;

        case 5:

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(0xFF);

            LCDCHAR(' ');LCDCHAR(' ');LCDCHAR(' ');

            break;

        case 6:

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(' ');LCDCHAR(' ');

            break;

        case 7:

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(' ');

            break;

        case 8:

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);LCDCHAR(0xFF);

            break;

    }

}

}