Daha önceden hazırladığım test kodlarını paylaşıyorum.
18F877A ile yapılan bu çalışmada 16 giriş ve 16 çıkış kullanılmıştır. Her buton ilgili ledini diğer butonlardan bağımsız şekilde yakıp/söndürebilmektedir.
Kodların içerisinde elimden geldiğince açıklama yapmaya çalıştım. Timer0 ile yaptığım kesme ile çıkışlar saniyede 1000 kez tazelenmektedir. Butonlar da ana döngü içerisinden okunmaktadır.
Doğal olarak farklı şekillerde yapmak mümkündür.
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/* * File: main.c * Author: mehmet * * Created on 11 Temmuz 2015 Cumartesi, 20:15 * 16 giriş ve 16 çıkış ile ayrı ayrı kontrol * her giriş ve her çıkış bağımsız olarak çalışmaktadır. * */ #include <stdint.h> // PIC16F877A Configuration Bit Settings // 'C' source line config statements #include <xc.h> // #pragma config statements should precede project file includes. // Use project enums instead of #define for ON and OFF. // CONFIG #pragma config FOSC = HS // Oscillator Selection bits (HS oscillator) #pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled) #pragma config PWRTE = ON // Power-up Timer Enable bit (PWRT enabled) #pragma config BOREN = ON // Brown-out Reset Enable bit (BOR enabled) #pragma config LVP = OFF // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3 is digital I/O, HV on MCLR must be used for programming) #pragma config CPD = OFF // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off) #pragma config WRT = OFF // Flash Program Memory Write Enable bits (Write protection off; all program memory may be written to by EECON control) #pragma config CP = ON // Flash Program Memory Code Protection bit (All program memory code-protected) #define _XTAL_FREQ 4000000L //4MHz harici kristal #define BASILI_BUTON_MAX 16 //Butonlar ve ledlerin portları #define LED0 PORTCbits.RC0 #define LED1 PORTCbits.RC1 #define LED2 PORTCbits.RC2 #define LED3 PORTCbits.RC3 #define LED4 PORTCbits.RC4 #define LED5 PORTCbits.RC5 #define LED6 PORTCbits.RC6 #define LED7 PORTCbits.RC7 #define LED8 PORTAbits.RA0 #define LED9 PORTAbits.RA1 #define LED10 PORTAbits.RA2 #define LED11 PORTAbits.RA3 #define LED12 PORTAbits.RA4 #define LED13 PORTAbits.RA5 #define LED14 PORTEbits.RE0 #define LED15 PORTEbits.RE1 #define BUTON0 PORTBbits.RB0 #define BUTON1 PORTBbits.RB1 #define BUTON2 PORTBbits.RB2 #define BUTON3 PORTBbits.RB3 #define BUTON4 PORTBbits.RB4 #define BUTON5 PORTBbits.RB5 #define BUTON6 PORTBbits.RB6 #define BUTON7 PORTBbits.RB7 #define BUTON8 PORTDbits.RD0 #define BUTON9 PORTDbits.RD1 #define BUTON10 PORTDbits.RD2 #define BUTON11 PORTDbits.RD3 #define BUTON12 PORTDbits.RD4 #define BUTON13 PORTDbits.RD5 #define BUTON14 PORTDbits.RD6 #define BUTON15 PORTDbits.RD7 uint8_t val; uint8_t val2; uint8_t buttonState; uint8_t lightMode = 0; uint8_t basiliButon[BASILI_BUTON_MAX] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; uint8_t basiliButonSon[BASILI_BUTON_MAX] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; /* * Mcu başlangıç ayarları */ static void mcuInit(void) { PORTA = 0x00; TRISA = 0x00; PORTB = 0x00; TRISB = 0xFF; PORTC = 0x00; TRISC = 0x00; PORTD = 0x00; TRISD = 0xFF; PORTE = 0x00; TRISE = 0x00; ADCON1bits.PCFG = 0b0110; CMCONbits.CM = 0b111; } /* * Timer0 için ön hazırlık. * http://eng-serve.com/pic/pic_timer.html * Bu sitede oluşturulan kodlar ile küçük düzenlemeler yapılmaktadır... */ void timerInit(void) { //Timer0 Registers Prescaler= 4 - TMR0 Preset = 6 - Freq = 1000.00 Hz - Period = 0.001000 seconds OPTION_REGbits.T0CS = 0; // bit 5 TMR0 Clock Source Select bit...0 = Internal Clock (CLKO) 1 = Transition on T0CKI pin OPTION_REGbits.T0SE = 0; // bit 4 TMR0 Source Edge Select bit 0 = low/high 1 = high/low OPTION_REGbits.PSA = 0; // bit 3 Prescaler Assignment bit...0 = Prescaler is assigned to the Timer0 OPTION_REGbits.PS2 = 0; // bits 2-0 PS2:PS0: Prescaler Rate Select bits OPTION_REGbits.PS1 = 0; OPTION_REGbits.PS0 = 1; TMR0 = 6; // preset for timer register // Interrupt Registers INTCON = 0; // clear the interrpt control register INTCONbits.TMR0IE = 1; // bit5 TMR0 Overflow Interrupt Enable bit...1 = Enables the TMR0 interrupt INTCONbits.TMR0IF = 0; // bit2 clear timer 0 interrupt flag INTCONbits.GIE = 1; // bit7 global interrupt enable } /* * Çıkış olarak tanımlanan portlara gereken değerler veriliyor... */ void ledYak(void) { LED0 = basiliButon[0]; LED1 = basiliButon[1]; LED2 = basiliButon[2]; LED3 = basiliButon[3]; LED4 = basiliButon[4]; LED5 = basiliButon[5]; LED6 = basiliButon[6]; LED7 = basiliButon[7]; LED8 = basiliButon[8]; LED9 = basiliButon[9]; LED10 = basiliButon[10]; LED11 = basiliButon[11]; LED12 = basiliButon[12]; LED13 = basiliButon[13]; LED14 = basiliButon[14]; LED15 = basiliButon[15]; } /* * Basılan buton var mı? */ void butonOku(uint8_t sonButon) { lightMode = basiliButon[sonButon]; buttonState = basiliButonSon[sonButon]; switch(sonButon) { case 0: val = BUTON0; break; case 1: val = BUTON1; break; case 2: val = BUTON2; break; case 3: val = BUTON3; break; case 4: val = BUTON4; break; case 5: val = BUTON5; break; case 6: val = BUTON6; break; case 7: val = BUTON7; break; case 8: val = BUTON8; break; case 9: val = BUTON9; break; case 10: val = BUTON10; break; case 11: val = BUTON11; break; case 12: val = BUTON12; break; case 13: val = BUTON13; break; case 14: val = BUTON14; break; case 15: val = BUTON15; break; } __delay_ms(10); switch(sonButon) { case 0: val2 = BUTON0; break; case 1: val2 = BUTON1; break; case 2: val2 = BUTON2; break; case 3: val2 = BUTON3; break; case 4: val2 = BUTON4; break; case 5: val2 = BUTON5; break; case 6: val2 = BUTON6; break; case 7: val2 = BUTON7; break; case 8: val2 = BUTON8; break; case 9: val2 = BUTON9; break; case 10: val2 = BUTON10; break; case 11: val2 = BUTON11; break; case 12: val2 = BUTON12; break; case 13: val2 = BUTON13; break; case 14: val2 = BUTON14; break; case 15: val2 = BUTON15; break; } if(val == val2) { if(val != buttonState) { if(val == 0) { if(lightMode == 0) { lightMode = 1; } else { lightMode = 0; } } } buttonState = val; basiliButon[sonButon] = lightMode; basiliButonSon[sonButon] = buttonState; } } /* * Interrupt Handler * Timer0 kesme oluşturduğunca çalışacak kodlar.. */ void interrupt ISR(void) { // Timer0 Interrupt - Freq = 1000.00 Hz - Period = 0.001000 seconds if(INTCONbits.TMR0IF == 1) // timer 0 interrupt flag { ledYak(); INTCONbits.TMR0IF = 0; // clear the flag INTCONbits.TMR0IE = 1; // reenable the interrupt TMR0 = 6; // reset the timer preset count } } /* * Ana Fonksiyon... */ void main(void) { mcuInit(); timerInit(); while(1) { butonOku(0); butonOku(1); butonOku(2); butonOku(3); butonOku(4); butonOku(5); butonOku(6); butonOku(7); butonOku(8); butonOku(9); butonOku(10); butonOku(11); butonOku(12); butonOku(13); butonOku(14); butonOku(15); } } |
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