AN2618

Code example 7.etpu_pwm.c

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}

if (duty > 0xFFFFFF)

{

errorCode = PARAM_OUT_RANGE;

duty = 0xFFFFFF;

}

// passing function parameter to eTPU function frame

*(pba_32 + ETPU_PWM_PERIOD_OFFSET) = period;

*(pba_32 + ETPU_PWM_DUTY_OFFSET) = duty;

//write hsr

ETPU.CHAN[channel].HSRR.R = ETPU_PWM_UPDATE;

return (errorCode);

}

/********************************************************************************

* FUNCTION

: etpu_pwm_getPulseTime

*

* PURPOSE:

This function executes on the host CPU.

*

*

This function is an application API to read the time stamp of the

*

*

begining of the last peroid of the PWM output on the ePTU channel.

*

********************************************************************************/

int16_t etpu_pwm_getPulseTime(uint8_t channel, uint32_t * startTime)

{

int16_t errorCode = 0;

uint32_t functFrame = ETPU.CHAN[channel].CR.B.CPBA;

uint32_t *pba_32 = &DATA_RAM + (functFrame << 1) + ETPU_PSE_RAM_OFFSET;

// passing function parameter to eTPU function frame

*startTime = *(pba_32 + ETPU_PWM_PULSE_TIME_OFFSET);

return (errorCode);

}