下面是PWM的产生程序EVA模块的可以测到EVB模块的测不到啊，怎么回事？？？？

只看该作者 · 2013-10-31 17:44

#include "DSP281x_Device.h"
#include "DSP281x_SysCtrl.h"
#include "DSP281x_Gpio.h"
#include "DSP281x_Ev.h"

void InitSysCtrl(void)    //系统初始化
{
  Uint16 i;
  EALLOW;
  SysCtrlRegs.WDCR=0x0068; //禁止看门狗
  SysCtrlRegs.PLLCR.all=0xA;    //初始化PLL
  for(i=0;i<5000;i++)
  {}
  SysCtrlRegs.HISPCP.all=0x0001; //HSPCLK=75MHz
  SysCtrlRegs.LOSPCP.all=0x0002; //LOSPCP=37.5MHz
  SysCtrlRegs.PCLKCR.bit.EVAENCLK=1; //使能EVA时钟
  SysCtrlRegs.PCLKCR.bit.EVBENCLK=1; //使能EVB时钟
  EDIS;
}

void InitGpio(void)
{
EALLOW;
GpioMuxRegs.GPAMUX.bit.PWM1_GPIOA0=1;
GpioMuxRegs.GPAMUX.bit.PWM2_GPIOA1=1;
GpioMuxRegs.GPAMUX.bit.PWM3_GPIOA2=1;
GpioMuxRegs.GPAMUX.bit.PWM4_GPIOA3=1;
GpioMuxRegs.GPBMUX.bit.PWM7_GPIOB0=1;
GpioMuxRegs.GPBMUX.bit.PWM8_GPIOB1=1;
GpioMuxRegs.GPBMUX.bit.PWM9_GPIOB2=1;
GpioMuxRegs.GPBMUX.bit.PWM10_GPIOB3=1;
EDIS;
}

void InitEv(void)
{
EvaRegs.T1CON.bit.TMODE=2;       //连续增模式
EvaRegs.T1CON.bit.TPS=1;       //T1CLK=75/2=37.5MHz
EvaRegs.T1CON.bit.TENABLE=0;    //暂时禁止T1计数
EvaRegs.T1CON.bit.TCLKS10=0;    //使用内部时钟T1CLK
EvaRegs.T1PR=0x03cf;
EvaRegs.T1CNT=0;
EvaRegs.COMCONA.bit.CENABLE=1; //使能比较单元的比较操作
EvaRegs.COMCONA.bit.FCOMPOE=1; //使能输出
EvaRegs.COMCONA.bit.CLD=2;

//死区时间4.27us
EvaRegs.DBTCONA.bit.DBT=10;    //死区定时器周期，m=10
EvaRegs.DBTCONA.bit.EDBT1=1;    //死区定时器1使能
EvaRegs.DBTCONA.bit.EDBT2=1;    //死区定时器2使能
EvaRegs.DBTCONA.bit.DBTPS=4;    //死区定时器预定标因子

EvaRegs.ACTRA.all=0x0999;       //设定引脚PWM1~6的动作属性,低电平有效
EvaRegs.CMPR1=0x01e8;          //PWM1、2的占空比50%
EvaRegs.CMPR2=0x01e8;          //PWM3、4的占空比50%

EvbRegs.T3CON.bit.TMODE=2;       //连续增模式
EvbRegs.T3CON.bit.TPS=1;       //T1CLK=75/2=37.5MHz
EvbRegs.T3CON.bit.TENABLE=0;    //暂时禁止T3计数
EvbRegs.T3CON.bit.TCLKS10=0;    //使用内部时钟T1CLK
EvbRegs.T3PR=0x03cf;
EvbRegs.T3CNT=0;
EvbRegs.COMCONB.bit.CENABLE=1; //使能比较单元的比较操作
EvbRegs.COMCONB.bit.FCOMPOE=1; //使能输出
EvbRegs.COMCONB.bit.CLD=2;

//死区时间4.27us
EvbRegs.DBTCONB.bit.DBT=10;    //死区定时器周期，m=10
EvbRegs.DBTCONB.bit.EDBT1=1;    //死区定时器1使能
EvbRegs.DBTCONB.bit.EDBT2=1;    //死区定时器2使能
EvbRegs.DBTCONB.bit.DBTPS=4;    //死区定时器预定标因子

EvbRegs.ACTRB.all=0x0999;       //设定引脚PWM1~6的动作属性,低电平有效
EvbRegs.CMPR4=0x01e8;          //PWM7、8的占空比50%
EvbRegs.CMPR5=0x01e8;          //PWM9、10的占空比50%
}

main(void)
{
InitSysCtrl();

DINT;
IER=0x0000;
IFR=0x0000;

InitGpio();
InitEv();
EvaRegs.T1CON.bit.TENABLE=1;
EvbRegs.T3CON.bit.TENABLE=1;
for(;;)
{
}
}