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PWM XC167 CAPCOM6

Hallo
kann mir jemand sagen wie Ich ein PWM bei der Xc167 erzeugen kann ? da sind viele Register ,und Ich weisse nicht welsche ich benuzen muss ?oder in welsche Rheienfolge ich die Register inizialisieren muss ?
hat jemand ein Programm wo man das sehen kann ?
MFG

0 Chris Wunderlich over 17 years ago

Here is a simple example for a PWM on CAPCOM6.

#include <xc167.h>
#include <intrins.h>

unsigned int update;
unsigned int dc;
unsigned int period;

void InitCCU6(void) {

  /*
   *  Configuration of CCU6 Timer 12:
   *  -----------------------------------------------------------------------
   *  - prescaler factor is 1 (CPU Clock = 20MHz = T12 Clock
   *  - clock tick = 1/20MHz = 50nsec
   *  - timer 12 works in edge aligned mode
   *  - 100% DC is when CCU6_CC60SR > CCU6_T12PR
   *  -   0% DC is when CCU6_CC60SR = 0
   */

  CCU6_T12PR   = 0x9C3F;   /* load CCU6 T12 period register */
  period       = 0x9C3F;
  CCU6_CC60SR  = 0x4E20;   /* load CCU60 duty cycle */
  dc           = 0x4E20;
  CCU6_T12MSEL = 0x0003;   /* load CCU60,COUT60 T12 compare mode  */
  CCU6_PSLR    = 0x0000;   /* load CCU60,COUT60 passive state level register */
  CCU6_MODCTR  = 0x0003;   /* load CCU60,COUT60 modulation control register */

  CCU6_T12DTC  = 0x0001;   /* load CCU6 dead time control register for T12 */
  CCU6_CMPSTAT = 0x0200;   /* COUT60 drives passive level while CC60ST is '1' */

  CCU6_TCTR4   = 0x4040;   /* load CCU60,COUT60 with shadow and reset T12 */

  /* - P1L.0 and P1L.1 are used for CAPCOM6 outputs (CCU60,COUT60) */
  ALTSEL0P1L =  0x0003;
  _bfld_ (P1L, 0x03,0x03);
  _bfld_ (DP1L,0x03,0x03);

  CCU6_TCTR4 = 0x0002;      /* Start T12 */
}

void UpdateDC(unsigned int value) {
  CCU6_CC60SR = value;
  CCU6_TCTR4 |= 0x0040;
}

void UpdatePeriod(unsigned int value) {
  CCU6_T12PR = value;
  CCU6_TCTR4 |= 0x0040;
}


void main(void) {
  PSW_IEN = 1;  /* globally enable interrupts */

  InitCCU6();   /* configure CAPCOM6 for simple PWM on P1L.0 with complement on P1L.1 */

  for(;;) { /* run forever! */

    if (update == 1) {
      UpdateDC(dc);
      update = 0;
    }

    if (update == 2) {
      UpdatePeriod(period);
      update = 0;
    }
  };
}