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arch/xtensa/espressif: add PWM capture getedges function

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Create esp_capture_getedges function which was missing from
the capture API.

Signed-off-by: Filipe Cavalcanti <filipe.cavalcanti@espressif.com>
This commit is contained in:
Filipe Cavalcanti
2025-11-27 10:38:53 -03:00
committed by Xiang Xiao
parent b3caa6717f
commit 027bc43df7
1 changed files with 40 additions and 3 deletions
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arch/xtensa/src/common/espressif/esp_mcpwm.c
+40 -3
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@@ -192,9 +192,10 @@ struct mcpwm_motor_lowerhalf_s
struct mcpwm_capture_event_data_s
{
uint32_t pos_edge_count;
uint32_t neg_edge_count;
uint32_t last_pos_edge_count;
uint32_t pos_edge_count; /* Counter value on positive edge */
uint32_t neg_edge_count; /* Counter value on negative edge */
uint32_t last_pos_edge_count; /* Last counter value on positive edge */
uint32_t pos_edge_square_count; /* Number of positive edges */
};
struct mcpwm_cap_channel_lowerhalf_s
@@ -240,6 +241,8 @@ static int esp_capture_getduty(struct cap_lowerhalf_s *lower,
uint8_t *duty);
static int esp_capture_getfreq(struct cap_lowerhalf_s *lower,
uint32_t *freq);
static int esp_capture_getedges(struct cap_lowerhalf_s *lower,
uint32_t *edges);
#endif
/* MCPWM Motor Control */
@@ -353,6 +356,7 @@ static const struct cap_ops_s mcpwm_cap_ops =
.stop = esp_capture_stop,
.getduty = esp_capture_getduty,
.getfreq = esp_capture_getfreq,
.getedges = esp_capture_getedges,
};
/* Data structures for the available capture channels */
@@ -1479,6 +1483,7 @@ static int esp_capture_start(struct cap_lowerhalf_s *lower)
priv->isr_count = 0;
priv->enabled = true;
priv->ready = false;
priv->data->pos_edge_square_count = 0;
cpinfo("Channel enabled: %d\n", priv->channel_id);
spin_unlock_irqrestore(&priv->common->mcpwm_spinlock, flags);
@@ -1583,6 +1588,37 @@ static int esp_capture_getfreq(struct cap_lowerhalf_s *lower,
}
#endif
/****************************************************************************
* Name: esp_capture_getedges
*
* Description:
* This function is a requirement of the upper-half driver. Returns
* the last edges count value.
*
* Input Parameters:
* lower - Pointer to the capture channel lower-half data structure.
* edges - uint32_t pointer where the edges count value is written.
*
* Returned Value:
* Returns OK on success.
*
****************************************************************************/
#ifdef CONFIG_ESP_MCPWM_CAPTURE
static int esp_capture_getedges(struct cap_lowerhalf_s *lower,
uint32_t *edges)
{
struct mcpwm_cap_channel_lowerhalf_s *priv = (
struct mcpwm_cap_channel_lowerhalf_s *)lower;
DEBUGASSERT(priv != NULL);
*edges = priv->data->pos_edge_square_count;
cpinfo("Get edges called from channel %d\n", priv->channel_id);
return OK;
}
#endif
/****************************************************************************
* Name: esp_mcpwm_capture_set_gpio
*
@@ -1801,6 +1837,7 @@ static int IRAM_ATTR mcpwm_driver_isr_default(int irq, void *context,
data->last_pos_edge_count = data->pos_edge_count;
data->pos_edge_count = cap_value;
data->neg_edge_count = data->pos_edge_count;
data->pos_edge_square_count++;
mcpwm_ll_capture_enable_negedge(common->hal.dev,
lower->channel_id,
true);