zhongduan.rar_avr单片机 步进电机

#include <avr/io.h> #define uchar unsigned char #define uint unsigned int unsigned char countnum[4]={0,0,0,0}; unsigned char a=0; unsigned const char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; #pragma interrupt_handler int_0:2 unsigned char int_0() { a++; } /**************************************** * 函数名称: void delay_ms(uint i) * * 函数功能：延时函数 * * 晶振频率：7.3728MHZ * * 入口参数：i mS * ****************************************/ void delay_us(unsigned int i) { while(i--) { asm("nop"); asm("nop"); } } /**************************************** * 函数名称: void delay_ms(uint i) * * 函数功能：延时函数 * * 晶振频率：7.3728MHZ * * 入口参数：i mS * ****************************************/ void delay_ms(unsigned int i) { unsigned int a; for(;i;i--) { for(a=570;a;a--) {;} } } //显示函数 void led(void) { unsigned char i; static unsigned char lednum[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x3f}; //unsigned char countnum[4]={0,0,0,0}; DDRB=0xff; PORTB=0xff; DDRD=0x0f; PORTD=0x0ff; //显示计数值 for(i=0;i<4;i++) { PORTD&=~(1<<i); if(2==i) PORTB=lednum[countnum[i]]+0x80; else PORTB=lednum[countnum[i]]; delay_ms(1); PORTD|=0xff; } //if(countnum[0]==9 && countnum[1]==9 && countnum[2]==9 && countnum[3]==9) // break; // } //} } void main(void) { SREG=0X80; GIMSK=0X40; MCUCR=0X02; DDRA=0; DDRB=0XFF; while(1) { PORTA=table[a]; ; } }