dg128pwm.c

飞思卡尔单片机MC9SDG128的PWM应用

/*-------------------------------------------------------
    PWM Module
    Donald
    Apr 16, 2007
-------------------------------------------------------*/
#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg128.h>     /* derivative information */
#include "DG128PWM.h"

void Pwm16Init(void) {

  // PWM67
  PWME_PWME6 = 0;
  PWME_PWME7 = 0;
  PWMCTL = 0X80;      // Use PWM6 PWM7
  PWMPRCLK = 0X30;    // B = bus / 8 = (8M?) / 8 = 1MHz
  PWMSCLB = 5;        // SB = B / (2 * PWMSCLB) = 100 kHz,( pulse is 10us )
  PWMCLK_PCLK7 = 1;   // 16bit PWM67 clock source is SB
  PWMPOL = 0X80;
  PWMDTY6 = 0X00;
  PWMDTY7 = 0X98;     // PWM duty is 1520us, and S3010 is 0 degree
  PWMPER6 = 0X07;     // T is 20000us    (20ms)
  PWMPER7 = 0XD0;
  PWME_PWME7 = 1;

}

///////////////////////////////////////////////////////////
// Turn a given degree
// nWise: 0 - CW, 1 - CCW
// nDegree: degree from 0 to 60.
void ActionDegree(int nWise, int nDegree){
  wordnbyte nTmp;
  if (nWise == 0){
    nTmp.wordW = 152 + nDegree;
  }
  else {
    nTmp.wordW = 152 - nDegree;
  }
  PWMDTY2 = nTmp.wordWS.byteH;
  PWMDTY3 = nTmp.wordWS.byteL;
}

void PwmInit(void) {
//  DDRP = 0XFF;

  PWME_PWME0 = 0;     // Disable PWM Ch0
  PWMPRCLK = 0x06;    // A = bus / 64 = 8M / 64 = 125kHz
  PWMSCLA = 10;       // Clock SA = 1000Hz
  PWMCLK_PCLK0 = 1;   // Ch0 clock source is SA
  PWMPOL |= 0x01;
  PWMDTY0 = 50;
  PWMPER0 = 255;      // T is 40ms
  PWME_PWME0 = 1;     // Enable PWM Ch0

  PWME_PWME1 = 0;     // Disable PWM Ch1
//  PWMPRCLK = 0x06;    // A = bus / 64 = 8M / 64 = 125kHz
//  PWMSCLA = 10;       // Clock SA = 1000Hz
  PWMCLK_PCLK1 = 1;   // Ch1 clock source is SA
  PWMPOL |= 0x02;
  PWMDTY1 = 50;
  PWMPER1 = 255;      // T is 40ms
  PWME_PWME1 = 1;     // Enable PWM Ch1
 }