AT89C2051驱动步进电机的电路和源码教学文案.doc

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1、Good is good, but better carries it.精益求精，善益求善。AT89C2051驱动步进电机的电路和源码-AT89C2051驱动步进电机的电路和源码电路如图所示：程序stepper.cstepper.hex/*STEPPER.C*sweepingsteppersrotorcwandcww400steps*Copyright(c)1999byW.Sirichote*/#includec:mc518051io.h/*includei/oheaderfile*/#includec:mc518051reg.hregisterunsignedcharj,flag1,temp

2、;registerunsignedintcw_n,ccw_n;unsignedcharstep8=0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90#definen400/*flag1maskbyte0x01runcw()0x02runccw()*/main()flag1=0;serinit(9600);dISAble();/*noneedtimerinterrupt*/cw_n=n;/*initialstepnumberforcw*/flag1|=0x01;/*initialenablecw()*/while(1)tick_wait();/*waitfor10ms

3、elapsed*/energize();/*round-robinexecutionthefollowingtasksevery10ms*/cw();ccw();cw()if(flag1&0x01)!=0)cw_n-;/*decrementcwstepnumber*/if(cw_n!=0)j+;/*ifnotzeroincrementindexj*/elseflag1&=0x01;/*dISAblecw()execution*/ccw_n=n;/*reloadstepnumbertoccwcounter*/flag1|=0x02;/*enablecww()execution*/ccw()if(

4、flag1&0x02)!=0)ccw_n-;/*decremnentccwstepnumber*/if(ccw_n!=0)j-;/*ifnotzerodecrementindexj*/elseflag1&=0x02;/*dISAbleccw()execution*/cw_n=n;/*reloadstepnumbertocwcounter*/flag1|=0x01;/*enablecw()execution*/tick_wait()/*cputickwasreplacedbysimplerASMcode10mswait*/asmJNBTCON.5,*;/*waitforTF0set*/asmCLRTCON.5;/*clearTF0forfurtherset*/asmORLTH0,#$DC;/*reloadTH0with$DC,TL0=0*/energize()P1=step(j&0x07);/*onlystep0-7needed*/-