pwm直流电机调速.doc

#include <>
#define uchar unsigned char
#define uint unsigned int
#define V_TH0 0XFF #include <>
#define uchar unsigned char
#define uint unsigned int
#define V_TH0 0XFF
#define V_TL0 0XF6
#define V_TMOD 0X01
void init_sys(void); //*系统初始化函数*/
void Delay_1ms(uint i); // 扫描延时
void Delay5Ms(void); //去抖
void delay_ms(uint xms);
unsigned char ZKB1,ZKB2;
uint i,k;
sbit Buzzer=P1^2;
uchar code table[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void main (void)
{
init_sys();
ZKB1=40; //*占空比初始值设定*/
ZKB2=70;
P2 = 0x00; //*占空比初始值设定*/
while(1)
{
if (P3_2) //如果按了+键，增加占空比
{
//Delay_1ms(5);
Delay5Ms();
if (P3_2)
{
ZKB1++;
ZKB2=100-ZKB1;
}
}
if (P3_3) //如果按了-键，减少占空比
{
//Delay_1ms(5);
Delay5Ms();
if (P3_3)
{
ZKB1--;
ZKB2=100-ZKB1;
}
//*对占空比值限定范围*/
}
P0 =0x00;
P0 =table[ZKB2/10%10];
P2 = 6;
Delay_1ms(5);
P0 =0x00;
P0 = table[ZKB2%10];
P2 = 7;
Delay_1ms(5);
if(ZKB2>62)
{for(k=0;k=1000;k++)
{
Buzzer=0;
delay_ms(1);//
Buzzer=1;