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xiaoxiang pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new bf3a5bb4cb arch/arm/src/samv7/sam_pwm.c: adjust arch driver to DCPOL
options
bf3a5bb4cb is described below
commit bf3a5bb4cbbd760112216ca87f79a0577cd29262
Author: Pressl, Štěpán <[email protected]>
AuthorDate: Fri Apr 5 16:56:05 2024 +0200
arch/arm/src/samv7/sam_pwm.c: adjust arch driver to DCPOL options
Signed-off-by: Stepan Pressl <[email protected]>
---
arch/arm/src/samv7/sam_pwm.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/arch/arm/src/samv7/sam_pwm.c b/arch/arm/src/samv7/sam_pwm.c
index 662db65854..2bfc60377d 100644
--- a/arch/arm/src/samv7/sam_pwm.c
+++ b/arch/arm/src/samv7/sam_pwm.c
@@ -332,7 +332,7 @@ static void pwm_set_deadtime(struct pwm_lowerhalf_s *dev,
uint8_t channel,
ub16_t duty);
#endif
static void pwm_set_polarity(struct pwm_lowerhalf_s *dev, uint8_t channel,
- uint8_t cpol);
+ uint8_t cpol, uint8_t dcpol);
/****************************************************************************
* Private Functions
@@ -631,6 +631,7 @@ static void pwm_set_deadtime(struct pwm_lowerhalf_s *dev,
uint8_t channel,
* dev - A reference to the lower half PWM driver state structure
* channel - Channel to by updated
* cpol - Desired polarity
+ * dcpol - Desired default polarity of a disabled channel
*
* Returned Value:
* None
@@ -638,18 +639,26 @@ static void pwm_set_deadtime(struct pwm_lowerhalf_s *dev,
uint8_t channel,
****************************************************************************/
static void pwm_set_polarity(struct pwm_lowerhalf_s *dev, uint8_t channel,
- uint8_t cpol)
+ uint8_t cpol, uint8_t dcpol)
{
struct sam_pwm_s *priv = (struct sam_pwm_s *)dev;
uint16_t regval;
regval = pwm_getreg(priv, SAMV7_PWM_CMRX + (channel * CHANNEL_OFFSET));
regval &= ~CMR_CPOL;
+ regval &= ~CMR_DPOLI;
+
if (cpol == PWM_CPOL_HIGH)
{
regval |= CMR_CPOL;
}
+ if ((dcpol == PWM_DCPOL_LOW && cpol == PWM_CPOL_HIGH) ||
+ (dcpol == PWM_DCPOL_HIGH && cpol == PWM_CPOL_LOW))
+ {
+ regval |= CMR_DPOLI;
+ }
+
pwm_putreg(priv, SAMV7_PWM_CMRX + (channel * CHANNEL_OFFSET), regval);
}
@@ -846,7 +855,8 @@ static int pwm_start(struct pwm_lowerhalf_s *dev,
info->channels[i].duty);
#endif
pwm_set_polarity(dev, priv->channels[index - 1].channel,
- info->channels[i].cpol);
+ info->channels[i].cpol,
+ info->channels[i].dcpol);
pwm_set_output(dev, priv->channels[index - 1].channel,
info->channels[i].duty);
#ifdef CONFIG_PWM_OVERWRITE
@@ -879,7 +889,7 @@ static int pwm_start(struct pwm_lowerhalf_s *dev,
info->dead_time_a, info->dead_time_b);
#endif
pwm_set_polarity(dev, priv->channels[0].channel,
- info->cpol);
+ info->cpol, info->dcpol);
pwm_set_output(dev, priv->channels[0].channel, info->duty);
#endif
