Avr单片机基于ATmega16的按键数码管程序.doc

江西渝州科技职业学院按键数码管程序/ Target : M16/ Crystal: 4.0000Mhz#include #include #define huang1 (PINB&BIT(PB0)#define huang2 (PINB&BIT(PB1)#define huang3 (PINB&BIT(PB2)#define huang4 (PINB&BIT(PB3)unsigned char xianshishuju8;unsigned char key=16; /16 表示无效键值void port_init(void) PORTA = 0xff; DDRA = 0xff; PORTB = 0xff; DDRB = 0xf0; PORTC = 0x00; /m103 output only DDRC = 0xff; PORTD = 0x00; DDRD = 0x00;/call this routine to initialize all peripheralsvoid init_devices(void) /stop errant interrupts until set up CLI(); /disable all interrupts port_init(); MCUCR = 0x00; GICR = 0x00; TIMSK = 0x00; /timer interrupt sources SEI(); /re-enable interrupts /all peripherals are now initialized/void delay(unsigned char m) unsigned char i,j; for(i=0;im;i+) for(j=0;j570;j+); unsigned char const duanma= 0XFC,/*0*/ 0x60,/*1*/ 0xDA,/*2*/ 0xF2,/*3*/ 0x66,/*4*/ 0xB6,/*5*/ 0xBE,/*6*/ 0xE0,/*7*/ 0xFE,/*8*/ 0xF6/*9*/;void baweixianshishuju(void) unsigned char i; for(i=0;i8;i+) PORTC=BIT(i); PORTA=duanmaxianshishujui; delay(1); PORTA=0X00; void main(void)unsigned char i; init_devices(); /insert your functional code while(1) / for(i=0;i10;i+)baweixianshishuju(); PORTB=0XEF; if(!huang1) key=3; if(!huang2) key=6; if(!huang3) key=9; PORTB=0XDF; if(!huang1) key=2; if(!huang2) key=5; if(!huang3) key=8; if(!huang4) key=0; PORTB=0XBF; if(!huang1) key=1; if(!huang2) key=4; if(!huang3) key=7; dobaweixianshishuju();PORTB=0X0F; while(PINB!=0x0F); if(key10)xianshishuju0=xianshishuju1;xianshishuju1=xianshishuju2;xianshishuju2=xianshishuju3;xianshishuju3=xianshishuju4;xianshishuju4=xianshishuju5;xianshishuju5=xianshishuju6