直流電機可控硅調速源程序，望大家看后提出意見。

＃i nclude
#define uchar unsigned char
#define uint unsigned int
uchar zhishi[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; /*顯示碼*/
uint a,b;
bit mod=1;
uchar i,j;
void jianpan(void)??????????????????/*鍵盤掃描程序*/
{
if(P2_1==0)??????????????/*P21為加速鍵*/
????if(a<49900)
????????a=a+100;
??????????????????
if(P2_5==0)??????????????/*P25為減速鍵*/
????if(a>100)
????????a=a-100;
???????????
}
void waite(void)?????????????/*顯示用延時程序*/
{
??for(i=0;i<3;i++)
????for(j=0;j<10;j++);
}
void xianshiqi(void)???????/*顯示程序*/
{
if(a>=45000)
????P0=zhishi[9];
????waite();
if(a>=40000&&a<45000)
????P0=zhishi[8];
????waite();
if(a>=35000&&a<40000)
????P0=zhishi[7];
????waite();
if(a>=30000&&a<35000)
????P0=zhishi[6];
????waite();
if(a>=25000&&a<30000)
????P0=zhishi[5];
????waite();
if(a>=20000&&a<25000)
????P0=zhishi[4];
????waite();
if(a>=15000&&a<20000)
????P0=zhishi[3];
????waite();
if(a>=10000&&a<15000)
????P0=zhishi[2];
????waite();
if(a>=5000&&a<10000)
????P0=zhishi[1];
????waite();
if(a<5000)
????P0=zhishi[0];
????waite();
}
void intie0(void) interrupt 0???????/*用于測試停止開關*/
{
mod=0;
}
void intt0(void) interrupt 1????????/*T0中斷服務，用于輸出占空比可調的脈沖*/
{
b=50000-a;
if(P1_0==1)
????{
??????TH0=(65536-a)/256;
??????TL0=(65536-a)%256;
??????P1_0=0; P1_3=0;
??????????????????????}
else
????{
??????TH0=(65536-b)/256;
??????TL0=(65536-b)%256;
??????P1_0=1; P1_3=1;
??????????????????????}
}
void intie1(void) interrupt 2????/*用于可控硅關斷*/
{
??P3_1=0;
??waite();
??for(i=0;i<150;i++)
?????for(j=0;j<3;j++);
??P3_1=1;
}
void main(void)
{
????????TMOD=0x01;
????????TH0=0xff;
????????TL0=0xff;
????????TCON=0x05;
????????IE=0x87;
?????cx:while(P2_6);
????????while(P2_6==0);
????????a=100;
????????TR0=1;
????????while(mod)
???????????{
?????????????jianpan();
?????????????xianshiqi();
????????????}
????????TR0=0;
????????P1_0=1;
????????P1_3=1;
????????P3_1=0;
????????waite();
????????P3_1=1;
????????????????P0=0xff;
????????if(mod==0)mod=1;
????????????????goto cx;
}