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stm32_pwm: fixes for PULSECOUNT support

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1. generate an indefinite number of pulses when info->count = 0
2. timers that don't support pulse-count shouldn't use pulse-count logic
This commit is contained in:
raiden00pl 2021-04-06 08:31:25 +02:00 committed by Alan Carvalho de Assis
parent 873293cc3f
commit 7cb7fe3f38
1 changed files with 32 additions and 23 deletions
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55
arch/arm/src/stm32/stm32_pwm.c
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@ -410,9 +410,8 @@ struct stm32_pwmtimer_s
uint8_t prev; /* The previous value of the RCR (pre-loaded) */
uint8_t curr; /* The current value of the RCR (pre-loaded) */
uint32_t count; /* Remaining pulse count */
#else
uint32_t frequency; /* Current frequency setting */
#endif
uint32_t frequency; /* Current frequency setting */
uint32_t base; /* The base address of the timer */
uint32_t pclk; /* The frequency of the peripheral
* clock that drives the timer module
@ -488,10 +487,9 @@ static int pwm_configure(FAR struct pwm_lowerhalf_s *dev);
#ifdef CONFIG_PWM_PULSECOUNT
static int pwm_pulsecount_timer(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info);
#else
#endif
static int pwm_timer(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info);
#endif
#ifdef HAVE_PWM_INTERRUPT
static int pwm_interrupt(FAR struct pwm_lowerhalf_s *dev);
# ifdef CONFIG_STM32_TIM1_PWM
@ -509,13 +507,12 @@ static int pwm_setup(FAR struct pwm_lowerhalf_s *dev);
static int pwm_shutdown(FAR struct pwm_lowerhalf_s *dev);
#ifdef CONFIG_PWM_PULSECOUNT
static int pwm_start(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info,
FAR void *handle);
#else
static int pwm_start_pulsecount(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info,
FAR void *handle);
#endif
static int pwm_start(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info);
#endif
static int pwm_stop(FAR struct pwm_lowerhalf_s *dev);
static int pwm_ioctl(FAR struct pwm_lowerhalf_s *dev,
@ -533,7 +530,11 @@ static const struct pwm_ops_s g_pwmops =
{
.setup = pwm_setup,
.shutdown = pwm_shutdown,
#ifdef CONFIG_PWM_PULSECOUNT
.start = pwm_start_pulsecount,
#else
.start = pwm_start,
#endif
.stop = pwm_stop,
.ioctl = pwm_ioctl,
};
@ -3376,7 +3377,6 @@ static int pwm_pulsecount_timer(FAR struct pwm_lowerhalf_s *dev,
FAR struct stm32_pwmtimer_s *priv = (FAR struct stm32_pwmtimer_s *)dev;
ub16_t duty = 0;
uint8_t channel = 0;
uint32_t mode = 0;
uint16_t outputs = 0;
int ret = OK;
@ -3394,7 +3394,6 @@ static int pwm_pulsecount_timer(FAR struct pwm_lowerhalf_s *dev,
duty = info->duty;
channel = priv->channels[0].channel;
mode = priv->channels[0].mode;
/* Disable all interrupts and DMA requests, clear all pending status */
@ -3503,7 +3502,7 @@ errout:
return ret;
}
#else /* !CONFIG_PWM_PULSECOUNT */
#endif /* CONFIG_PWM_PULSECOUNT */
/****************************************************************************
* Name: pwm_configure
@ -3795,7 +3794,6 @@ static int pwm_timer(FAR struct pwm_lowerhalf_s *dev,
errout:
return ret;
}
#endif /* CONFIG_PWM_PULSECOUNT */
#ifdef HAVE_PWM_INTERRUPT
@ -4230,10 +4228,16 @@ static int pwm_setup(FAR struct pwm_lowerhalf_s *dev)
*/
#ifdef CONFIG_PWM_PULSECOUNT
ret = pwm_pulsecount_configure(dev);
#else
ret = pwm_configure(dev);
if (priv->timtype == TIMTYPE_ADVANCED)
{
ret = pwm_pulsecount_configure(dev);
}
else
#endif
{
ret = pwm_configure(dev);
}
if (ret < 0)
{
pwmerr("failed to configure PWM %d\n", priv->timid);
@ -4331,12 +4335,19 @@ errout:
****************************************************************************/
#ifdef CONFIG_PWM_PULSECOUNT
static int pwm_start(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info,
FAR void *handle)
static int pwm_start_pulsecount(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info,
FAR void *handle)
{
FAR struct stm32_pwmtimer_s *priv = (FAR struct stm32_pwmtimer_s *)dev;
/* Generate an indefinite number of pulses */
if (info->count == 0)
{
return pwm_start(dev, info);
}
/* Check if a pulsecount has been selected */
if (info->count > 0)
@ -4361,7 +4372,8 @@ static int pwm_start(FAR struct pwm_lowerhalf_s *dev,
return pwm_pulsecount_timer(dev, info);
}
#else /* !CONFIG_PWM_PULSECOUNT */
#endif /* CONFIG_PWM_PULSECOUNT */
static int pwm_start(FAR struct pwm_lowerhalf_s *dev,
FAR const struct pwm_info_s *info)
{
@ -4403,7 +4415,6 @@ static int pwm_start(FAR struct pwm_lowerhalf_s *dev,
return ret;
}
#endif /* CONFIG_PWM_PULSECOUNT */
/****************************************************************************
* Name: pwm_stop
@ -4587,11 +4598,9 @@ static int pwm_stop(FAR struct pwm_lowerhalf_s *dev)
flags = enter_critical_section();
#ifndef CONFIG_PWM_PULSECOUNT
/* Stopped so frequency is zero */
priv->frequency = 0;
#endif
/* Disable further interrupts and stop the timer */