dsp28_evpwm1.c

TDS2812--pwm调试程序--电机控制

#include "DSP281x_Device.h"
void main(void)
{//Step1
InitSysCtrl();

//Step2
	EALLOW;   
   GpioMuxRegs.GPBMUX.all = 0x0003; // EVB PWM 7-8 pins
   GpioMuxRegs.GPAMUX.all= 0x0000; // 设置成I/O模式
   GpioMuxRegs.GPADIR.all = 0x0003;//设置输出
   EDIS;     
  
   int Pwmcont=12000;
   EvbRegs.T3PR=Pwmcont/2;   //设定PWM的周期=Pwmcont*1/震荡频率
   EvbRegs.T3CNT=0;         //初始值
   EvbRegs.T3CON.all=0x0846;   //增减计数,不分频,使能(主程序使能)
                              //使能程序为EvbRegs.T3CON.bit.TENABLE=1
   EvbRegs.T3CMPR=Pwmcont/4;      //脉宽初始为50%
   EvbRegs.GPTCONB.bit.T3PIN=2;  //设高电平有效
   EvbRegs.GPTCONB.bit.TCMPOE=1;
   EvbRegs.GPTCONB.bit.T3CMPOE=1; //T3使能
   EvbRegs.COMCONB.all=0x0A400;  //使能比较操作
   EvbRegs.ACTRB.all=0x0002;   //pwm7高有效
   EvaRegs.ACTRA.all=0x0002;   //pwm1高有效 
   EvaRegs.DBTCONA.all = 0x0000;
   EvbRegs.CMPR4 = Pwmcont/4;
}