sergiotarxz/nuttx
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Support indefinite number of pulses generation in PULSECOUNT mode

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This commit is contained in:
Young 2016-12-20 14:08:31 +08:00
parent e35406f7d6
commit 9d355e12d5
1 changed files with 21 additions and 6 deletions
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27
arch/arm/src/tiva/tiva_pwm.c
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@ -509,6 +509,27 @@ static int tiva_pwm_start(FAR struct pwm_lowerhalf_s *dev,
chan->inited = true;
}
/* Count 0 means to generate indefinite number of pulses */
if (info->count == 0)
{
pwm_expired(chan->handle);
/* Disable interrupt */
uint32_t enable = getreg32(chan->controller_base + TIVA_PWM_INTEN_OFFSET);
enable &= ~(INT_ENABLE << chan->generator_id);
putreg32(enable, chan->controller_base + TIVA_PWM_INTEN_OFFSET);
}
else
{
/* Enable interrupt */
uint32_t enable = getreg32(chan->controller_base + TIVA_PWM_INTEN_OFFSET);
enable |= (INT_ENABLE << chan->generator_id);
putreg32(enable, chan->controller_base + TIVA_PWM_INTEN_OFFSET);
}
/* Start the timer */
return tiva_pwm_timer(chan, info);
@ -818,12 +839,6 @@ FAR struct pwm_lowerhalf_s *tiva_pwm_initialize(int channel)
#endif
}
/* Enable interrupt */
uint32_t enable = getreg32(chan->controller_base + TIVA_PWM_INTEN_OFFSET);
enable |= (INT_ENABLE << chan->generator_id);
putreg32(enable, chan->controller_base + TIVA_PWM_INTEN_OFFSET);
#endif
return (FAR struct pwm_lowerhalf_s *)chan;