RM48L952ZWT HalCoGen 4.03.00 het.c pwm functions and math precision for float calculations

Hi Prathap, what do you mean? Below is the code with float instead of uint - can you explain using practical example from below on the functions?

/** @typedef hetSIGNALFLOAT_t

* @brief HET Signal Type Definition

*

* This type is used to access HET Signal Information.

*/

typedef volatile struct hetSignalFloat

{

   float32 duty; /**< Duty cycle in % of the period */

   float64 period; /**< Period in us */

} hetSIGNALFLOAT_t;

/** @fn void pwmSetSignalFloat(hetRAMBASE_t * hetRAM, uint32 pwm, hetSIGNALFLOAT_t signal)

* @brief Set period

* @param[in] hetRAM Pointer to HET RAM:

* - hetRAM1: HET1 RAM pointer

* - hetRAM2: HET2 RAM pointer

* @param[in] pwm Pwm signal:

* - pwm0: Pwm 0

* - pwm1: Pwm 1

* - pwm2: Pwm 2

* - pwm3: Pwm 3

* - pwm4: Pwm 4

* - pwm5: Pwm 5

* - pwm6: Pwm 6

* - pwm7: Pwm 7

* @param[in] signal signal

- duty cycle in %.

* - period period in us.

*

* Sets a new pwm signal

*/

void pwmSetSignalFloat(hetRAMBASE_t * hetRAM, uint32 pwm, float32 dutyCycle, float64 period)

{

   uint32 action;

   uint32 pwmPolarity = 0U;

   float64 pwmPeriod = 0.0F;

   if(hetRAM == hetRAM1)

  {

    pwmPeriod = (period * 1000.0F) / 1280.000F;

    pwmPolarity = s_het1pwmPolarity[pwm];

  }

   else

  {

    pwmPeriod = (period * 1000.0F) / 1280.000F;

    pwmPolarity = s_het2pwmPolarity[pwm];

  }

   if (dutyCycle == 0U)

  {

    action = (pwmPolarity == 3U) ? 0U : 2U;

  }

   else if (dutyCycle >= 100U)

  {

    action = (pwmPolarity == 3U) ? 2U : 0U;

  }

   else

  {

    action = pwmPolarity;

  }

     hetRAM->Instruction[(pwm << 1U) + 41U].Control = ((hetRAM->Instruction[(pwm << 1U) + 41U].Control) & (~(uint32)(0x00000018U))) | (action << 3U);

     hetRAM->Instruction[(pwm << 1U) + 41U].Data = (uint32)((((pwmPeriod * dutyCycle) / 100U) * 128U ) + 128U);

     hetRAM->Instruction[(pwm << 1U) + 42U].Data = ((uint32)pwmPeriod << 7U) - 128U;

}

/** @fn void pwmGetSignal(hetRAMBASE_t * hetRAM, uint32 pwm, hetSIGNAL_t signal)

* @brief Get duty cycle

* @param[in] hetRAM Pointer to HET RAM:

* - hetRAM1: HET1 RAM pointer

* - hetRAM2: HET2 RAM pointer

* @param[in] pwm Pwm signal:

* - pwm0: Pwm 0

* - pwm1: Pwm 1

* - pwm2: Pwm 2

* - pwm3: Pwm 3

* - pwm4: Pwm 4

* - pwm5: Pwm 5

* - pwm6: Pwm 6

* - pwm7: Pwm 7

* @param[in]

* - duty cycle in %.

* - period period in us.

*

* Gets current signal of the given pwm signal.

*/

/* SourceId : HET_SourceId_006 */

/* DesignId : HET_DesignId_006 */

/* Requirements : HL_SR368 */

void pwmGetSignalFloat(hetRAMBASE_t * hetRAM, uint32 pwm, hetSIGNALFLOAT_t *signal)

{

   float32 pwmDuty = (hetRAM->Instruction[(pwm << 1U) + 41U].Data - 128U) >> 7U;

   float64 pwmPeriod = (hetRAM->Instruction[(pwm << 1U) + 42U].Data + 128U) >> 7U;

   signal->duty = (pwmDuty * 100U) / pwmPeriod;

   if(hetRAM == hetRAM1)

   {

     signal->period = ((float64)pwmPeriod * 1280.000F) / 1000.0F;

   }

   else

  {

     signal->period = ((float64)pwmPeriod * 1280.000F) / 1000.0F;

  }

}