hal_pmm.c

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//****************************************************************************//
// Function Library for setting the PMM
//    File: hal_pmm.c
//
//    Texas Instruments
//
//    Version 1.2
//    07/29/09
//
//****************************************************************************//


/* ***********************************************************
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//
//This software has been submitted to export control regulations
//The ECCN is EAR99 
* ********************************************************* */
//*****************************************************************************
#include "MSP430.h"
#include "hal_pmm.h"


//****************************************************************************//
// Set VCore
//****************************************************************************//
void SetVCore (unsigned char level)
{
  unsigned int actlevel;
  level &= PMMCOREV_3;                       // Set Mask for Max. level
  actlevel = (PMMCTL0 & PMMCOREV_3);         // Get actuel VCore

  while (level != actlevel)
  {
    if (level > actlevel)
      SetVCoreUp(++actlevel);
    else
      SetVCoreDown(--actlevel);
  }
}

//****************************************************************************//
// Set VCore up
//****************************************************************************//
void SetVCoreUp (unsigned char level)
{
  // Open PMM registers for write access
  PMMCTL0_H = 0xA5;
  // Set SVS/SVM high side new level
  SVSMHCTL = SVSHE + SVSHRVL0 * level + SVMHE + SVSMHRRL0 * level;
  // Set SVM low side to new level
  SVSMLCTL = SVMLFP + SVSLE + SVMLE + SVSMLRRL0 * level;
  // Wait till SVM is settled
  while ((PMMIFG & SVSMLDLYIFG) == 0);
  // Clear already set flags
  PMMIFG &= ~(SVMLVLRIFG + SVMLIFG);
  // Set VCore to new level
  PMMCTL0_L = PMMCOREV0 * level;
  // Wait till new level reached
  if (PMMIFG & SVMLIFG)
  while ((PMMIFG & SVMLVLRIFG) == 0);
  // Set SVS/SVM low side to new level
  SVSMLCTL = SVSLE + SVSLRVL0 * level + SVMLE + SVSMLRRL0 * level;
  // Lock PMM registers for write access
  PMMCTL0_H = 0x00;
}


//****************************************************************************//
// Set VCore down
//****************************************************************************//
void SetVCoreDown (unsigned char level)
{
  PMMCTL0_H = 0xA5;                         // Open PMM module registers for write access
  SVSMLCTL = SVSLE + SVSLRVL0 * level + SVMLE + SVSMLRRL0 * level;
//  SVSMLCTL = SVSLE + SVSLRVL0 * level + SVMLE + SVSMLRRL0 * level | SVMLOVPE;  // Set SVM new Level low side + overvoltage detection
                                                                                 // this will wait till VCore is below the level
  // Set SVS/SVM high side new level
  SVSMHCTL = SVSHE + SVSHRVL0 * level + SVMHE + SVSMHRRL0 * level;
  while ((PMMIFG & SVSMLDLYIFG) == 0);      // Wait till SVM is settled (Delay)
  PMMCTL0 = 0xA500 | (level * PMMCOREV0);   // Set VCore to requested level
  while (PMMIFG & SVMLIFG)
    PMMIFG &= ~(SVMLIFG);                   // Wait till SVM will not be set anymore
  // Set SVS/SVM low side to new level
//  SVSMLCTL = SVSLE + SVSLRVL0 * level + SVMLE + SVSMLRRL0 * level;
  PMMCTL0_H = 0x00;                         // Lock PMM module registers for write access
}