spwm的数字控制.doc

spwm的数字控制
#include<p30f6010a.h>
#include"pwm.h"
#include"ADC.H"
_FOSC(CSW_FSCM_OFF&XT_PLL4);//4倍频晶振，Failsafe时钟关闭
_FWDT(WDT_OFF);//关闭看门狗定时器
_FBORPOR(PBOR_OFF&MCLR_EN);//掉电复位禁止，MCLR复位使能。
_FGS(CODE_PROT_OFF);//代码保护禁止
#defineOffset_1200x5555//120度偏移值
intflag_pwm;
intAmplitude;
intFrequency;
voidDelay();
constintPWM_Scaling=230;//pwm周期值
constintsinetable[]=//这是一个含有64个值的正弦波表，覆盖了正弦函数的360度。
{
0,3212,6393,9512,12539,15446,18204,20787,23170,25329,
27245,28898,30273,31356,32137,32609,32767,32609,32137,31356,30273,28898,
27245,25329,23170,20787,18204,15446,12539,9512,6393,3212,0,-3212,-6393,
-9512,-12539,-15446,-18204,-20787,-23170,-25329,-27245,-28898,-30273,
-31356,-32137,-32609,-32767,-32609,-32137,-31356,-30273,-28898,-27245,
-25329,-23170,-20787,-18204,-15446,-12539,-9512,-6393,-3212,
};
intmain(void)
{
intTemp1,Temp2,Temp3,Phase;
PORTD=0;
PORTE=0;
TRISD=0xF7FF;//设置RD11输出驱动PWM缓冲器
TRISE=0xFDFF;//设置RE9输出复位电源模块
PORTE=0X0200;//电机复位
Delay(10);
PORTE=0;
init_ADC();
init_pwm();
while(1)
{
if(flag_pwm==1)
{
flag_pwm=0;
Phase=Phase+Frequency;//查表值
Temp1=Phase;//a相查表值
Temp2=Temp1+Offset_120;//a+120得到b相查表值
Temp3=Temp2+Offset_120;//b+120得到c相查表值
Temp1=Temp1>>10;//将a相右移得到6位查表值
Temp1=Temp1<<1;//左移一位得到a相字节查表值
Temp2=Temp2>>10;
Temp2=Temp2<<1;//b
Temp3=Temp3>>10;
Temp3=Temp3<<1;//c
/*********************************************************/
//计算第一相占空比
Temp1=sinetable[Temp1];
Temp1=Temp1*Amplitude;
Temp1=Temp1*PWM_Scaling;
Temp1=Temp1+PWM_Scaling;
PDC1=Temp1;
//计算第二相占空比
Temp2=sinetable[Temp2];
Temp2=Temp2*Amplitude;
Temp2=Temp2*PWM_Scaling;
Temp2=Temp2+PWM_Scaling;
PDC2=Temp2;
//计算第三相占空比
Temp3=sinetable[Temp3];
Temp3=Temp3*Amplitude;
Temp3=Temp3*PWM_Scaling;
Temp3=Temp3+PWM_Scaling;
PDC3=Temp3;
}
//else
//{
//;
//}
}
}
voidDelay(unsignedintcount)
{
unsignedintj;

for(j=0;j<count;j++);

return;
}
*********************************************************************************
#include<p30f6010a.h>
#include"spwm.h"
//intFrequency;
//intAmplitude;
voidinit_ADC(void)
{
//ADinitialization
ADPCFG