DSP新手提问

只看该作者 · 2013-1-16 14:39

在下面程序中T1CMPR和CMPR1有什么区别？（红色标注）
void Init_EVA(void)
{
      EALLOW;
         GpioMuxRegs.GPAMUX.all = 0x00FF; // EVA PWM 1-6
         EDIS;

         EvaRegs.T1PR = Period;    // Timer1 period
         EvaRegs.T1CMPR = Pulse;    // Timer1 compare
         EvaRegs.T1CNT = 0x0000;    // Timer1 counter
         EvaRegs.T1CON.all = 0x1042; //连续增计数模式，使能定时器，比较使能
         EvaRegs.T1CON.bit.TPS=6; //设置高速时钟64分频

      EvaRegs.T2PR = Period;    // Timer2 period
      EvaRegs.T2CMPR = Pulse;    // Timer2 compare
      EvaRegs.T2CNT = 0x0000;    // Timer2 counter
      EvaRegs.T2CON.all = 0x1042; //连续增计数模式，使能定时器，比较使能
      EvaRegs.T2CON.bit.TPS=6; //设置高速时钟64分频

      EvaRegs.GPTCONA.bit.TCMPOE = 1;//设置引脚T1PWM_T1CMP、T2PWM_T2CMP由定时器1和2独立驱动
      EvaRegs.GPTCONA.bit.T1PIN = 1; //设置低有效
      EvaRegs.GPTCONA.bit.T2PIN = 2; //设置高有效

      EvaRegs.CMPR1 = 3125;//设置比较寄存器
      EvaRegs.CMPR2 = 6250;
      EvaRegs.CMPR3 = 8270;

      EvaRegs.ACTRA.all = 0x0999; //设置输出特性
      EvaRegs.DBTCONA.bit.EDBT1 = 1; //使能PWM1/2死区电路
      EvaRegs.DBTCONA.bit.EDBT2 = 1; //使能PWM3/4死区电路
      EvaRegs.DBTCONA.bit.EDBT3 = 1; //使能PWM5/6死区电路
      EvaRegs.DBTCONA.bit.DBTPS = 3; //设置死区电路时间预分频
      EvaRegs.DBTCONA.bit.DBT = 10;  //设置死区电路周期
      EvaRegs.COMCONA.all = 0xA600;  //设置比较单元
}