/**
* \brief Change the setting of PWM comparison.
*
* \param p_pwm Pointer to a PWM instance.
* \param p_cmp Configurations of PWM comparison tagged by unit.
*
* \retval 0 if changing succeeds, otherwise fails.
*/
uint32_t pwm_cmp_change_setting(Pwm *p_pwm, pwm_cmp_t *p_cmp)
{
uint32_t unit = p_cmp->unit;
p_pwm->PWM_CMP[unit].PWM_CMPVUPD = PWM_CMPV_CV(p_cmp->ul_value) |
(p_cmp->b_is_decrementing << 24);
p_pwm->PWM_CMP[unit].PWM_CMPMUPD = PWM_CMPM_CTR(p_cmp->ul_trigger) |
PWM_CMPM_CPR(p_cmp->ul_period) |
PWM_CMPM_CUPR(p_cmp->ul_update_period);
/** Boolean of generating a match pulse */
if (p_cmp->b_pulse_on_line_0) {
p_pwm->PWM_ELMR[0] |= (1 << unit);
} else {
p_pwm->PWM_ELMR[0] &= ~((uint32_t) (1 << unit));
}
/** Boolean of generating a match pulse */
if (p_cmp->b_pulse_on_line_1) {
p_pwm->PWM_ELMR[1] |= (1 << unit);
} else {
p_pwm->PWM_ELMR[1] &= ~((uint32_t) (1 << unit));
}
/** Boolean of comparison enable */
if (p_cmp->b_enable) {
p_pwm->PWM_CMP[unit].PWM_CMPMUPD |= PWM_CMPM_CEN;
} else {
p_pwm->PWM_CMP[unit].PWM_CMPMUPD &= ~PWM_CMPM_CEN;
}
return 0;
}
/*------------------------------------------------------------------------------
Name: configurePWMC
parameters: -
description: initializes the PWM controller
------------------------------------------------------------------------------*/
void BldcControl::configurePWMC(void)
{
uint32_t clka = 0; /* clock A not used */
uint32_t clkb = 0; /* clock B not used */
uint32_t mck = MCK_CLOCK_42MHZ;
uint16_t duty = 0;
uint16_t deadTime;
pwmPeriod = MCK_CLOCK_42MHZ / this->periphery->Pwm.pwmSwFrq;
deadTime = (uint16_t)(pwmPeriod * (DEAD_TIME * this->periphery->Pwm.pwmSwFrq * 2));
/* disable all 3 channels */
PWMC_DisableChannel(PWM, this->periphery->Pwm.pwmChU);
PWMC_DisableChannel(PWM, this->periphery->Pwm.pwmChV);
PWMC_DisableChannel(PWM, this->periphery->Pwm.pwmChW);
PWMC_ConfigureClocks(clka, clkb, mck);
/* initialize all 3 channels */
PWMC_ConfigureChannelExt(PWM,
this->periphery->Pwm.pwmChU, /* channel ID */
PWM_CMR_CPRE_MCK, /* use main clock */
PWM_CMR_CALG, /* center alligned */
0, /* polarity low level */
0, /* event counter = 0 */
PWM_CMR_DTE, /* enable dead time */
0, /* no inversion of dead time H */
0); /* no inversion of dead time L */
PWMC_ConfigureChannelExt(PWM,
this->periphery->Pwm.pwmChV, /* channel ID */
PWM_CMR_CPRE_MCK,
PWM_CMR_CALG, /* center alligned */
0, /* polarity low level */
0, /* event counter = 0 */
PWM_CMR_DTE, /* enable dead time */
0, /* no inversion of dead time H */
0); /* no inversion of dead time L */
PWMC_ConfigureChannelExt(PWM,
this->periphery->Pwm.pwmChW, /* channel ID */
PWM_CMR_CPRE_MCK,
PWM_CMR_CALG, /* center alligned */
0, /* polarity low level */
0, /* event counter = 0 */
PWM_CMR_DTE, /* enable dead time */
0, /* no inversion of dead time H */
0); /* no inversion of dead time L */
PWMC_ConfigureSyncChannel(PWM,
PWM_SCM_SYNC0|PWM_SCM_SYNC1|PWM_SCM_SYNC2,
PWM_SCM_UPDM_MODE0,
PWM_SCM_PTRM,
PWM_SCM_PTRCS(0)) ;
/* set periods */
PWMC_SetPeriod(PWM, this->periphery->Pwm.pwmChU, pwmPeriod);
PWMC_SetPeriod(PWM, this->periphery->Pwm.pwmChV, pwmPeriod);
PWMC_SetPeriod(PWM, this->periphery->Pwm.pwmChW, pwmPeriod);
/* set duty cycles */
PWMC_SetDutyCycle(PWM, this->periphery->Pwm.pwmChU, duty);
PWMC_SetDutyCycle(PWM, this->periphery->Pwm.pwmChV, duty);
PWMC_SetDutyCycle(PWM, this->periphery->Pwm.pwmChW, duty);
/* set dead times */
PWMC_SetDeadTime(PWM, this->periphery->Pwm.pwmChU, deadTime, deadTime);
PWMC_SetDeadTime(PWM, this->periphery->Pwm.pwmChV, deadTime, deadTime);
PWMC_SetDeadTime(PWM, this->periphery->Pwm.pwmChW, deadTime, deadTime);
/* set overwrites to 0 */
PWMC_SetOverrideValue(PWM, 0);
/* set event for ADC trigger */
PWM->PWM_CMP[this->periphery->Pwm.pwmChU].PWM_CMPM |= PWM_CMPM_CEN | /* enable */
PWM_CMPM_CTR(0) | /* each period */
PWM_CMPM_CPR(0);
PWM->PWM_CMP[this->periphery->Pwm.pwmChU].PWM_CMPV = pwmPeriod/2; /* set trigger */
PWM->PWM_ELMR[0] |= PWM_ELMR_CSEL0; /* enable event line 0 */
}
