2812源代码，为什么不能生成PWM波？请教达人

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fanny309|

楼主 | 2009-3-31 16:52 | 只看该作者回帖奖励

|倒序浏览 |阅读模式

PWM波, 源代码, ev, pi, gp

#include "DSP28_Device.h"

void init_eva(void);

void main(void)
{

   InitSysCtrl();

   EALLOW;

   GpioMuxRegs.GPAMUX.all = 0x00FF; // EVA PWM 1-6  pins
   GpioMuxRegs.GPBMUX.all = 0x00FF; // EVB PWM 7-12 pins
   EDIS;

   DINT;

   InitPieCtrl();

   IER = 0x0000;
   IFR = 0x0000;

   InitPieVectTable();


   init_eva();

  for(;;);

}

void init_eva()
{

   EvaRegs.T1PR = 0xFFFF;       // Timer1 period
   EvaRegs.T1CMPR = 0x3C00;     // Timer1 compare
   EvaRegs.T1CNT = 0x0000;      // Timer1 counter

   EvaRegs.T1CON.all = 0x1042;


  EvaRegs.T2PR = 0x0FFF;       // Timer2 period
  EvaRegs.T2CMPR = 0x03C0;     // Timer2 compare
  EvaRegs.T2CNT = 0x0000;      // Timer2 counter

  EvaRegs.T2CON.all = 0x1042;

  EvaRegs.GPTCONA.bit.TCOMPOE = 1;

  EvaRegs.GPTCONA.bit.T1PIN = 1;

  EvaRegs.GPTCONA.bit.T2PIN = 2;

  EvaRegs.CMPR1 = 0x0C00;
  EvaRegs.CMPR2 = 0x3C00;
  EvaRegs.CMPR3 = 0xFC00;


  EvaRegs.ACTR.all = 0x0666;
  EvaRegs.DBTCONA.all = 0x0000; // Disable deadband
  EvaRegs.COMCONA.all = 0xA600;

}
其实，代码是移植的别人的程序，基本上没做什么改变。不知为什么在引脚用示波器看，没看到矩形波，只是高电平

困扰了好几天了，郁闷~

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