pjt.rar_AVR 按键 控制

//ICC-AVR application builder : 2009-8-13 13:58:43 // Target : M16 // Crystal: 12.000Mhz #include <iom16v.h> #include <macros.h> void port_init(void) { PORTC = 0x00; DDRC = 0x00; PORTB = 0xFF; DDRB = 0x00; PORTA = 0x00; //m103 output only DDRA = 0xFF; PORTD = 0xFF; DDRD = 0x00; } void watchdog_init(void) { WDR(); //this prevents a timout on enabling WDTCR = 0x0F; //WATCHDOG ENABLED - dont forget to issue WDRs } void delay_1ms(void) { unsigned int i; for (i=1;i<570;i++) ; } void delay(unsigned int n) { unsigned int i=0; while (i<n) { delay_1ms(); i++; } } void main(void) { unsigned char oldP,newP; port_init(); watchdog_init(); newP=0; oldP=0; for(;;) { oldP=PINA; if(oldP^newP) { delay(20); newP=PINA; if(oldP&newP) { newP&=oldP; PORTC^=newP; } } WDR(); } }