driver/ledc: support invert channel output

components/driver/include/driver/ledc.h

@@ -76,6 +76,7 @@ esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
 
 /**
  * @brief Set LEDC output gpio.
+ * @deprecated This function is redundant, please use ledc_channel_config to set gpio pins.
  *
  * @param  gpio_num The LEDC output gpio
  * @param  speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
@@ -85,8 +86,8 @@ esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
  *     - ESP_OK Success
  *     - ESP_ERR_INVALID_ARG Parameter error
  */
-esp_err_t ledc_set_pin(int gpio_num, ledc_mode_t speed_mode, ledc_channel_t ledc_channel);
-
+esp_err_t ledc_set_pin(int gpio_num, ledc_mode_t speed_mode, ledc_channel_t ledc_channel)
+    __attribute__((deprecated("use ledc_channel_config instead")));
 /**
  * @brief LEDC stop.
  *        Disable LEDC output, and set idle level

components/driver/ledc.c

@@ -372,6 +372,7 @@ esp_err_t ledc_channel_config(const ledc_channel_config_t* ledc_conf)
     uint32_t intr_type = ledc_conf->intr_type;
     uint32_t duty = ledc_conf->duty;
     uint32_t hpoint = ledc_conf->hpoint;
+    bool output_invert = ledc_conf->flags.output_invert;
     LEDC_ARG_CHECK(ledc_channel < LEDC_CHANNEL_MAX, "ledc_channel");
     LEDC_ARG_CHECK(speed_mode < LEDC_SPEED_MODE_MAX, "speed_mode");
     LEDC_ARG_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "gpio_num");
@@ -405,7 +406,7 @@ esp_err_t ledc_channel_config(const ledc_channel_config_t* ledc_conf)
     /*set LEDC signal in gpio matrix*/
     gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[gpio_num], PIN_FUNC_GPIO);
     gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
-    esp_rom_gpio_connect_out_signal(gpio_num, ledc_periph_signal[speed_mode].sig_out0_idx + ledc_channel, 0, 0);
+    esp_rom_gpio_connect_out_signal(gpio_num, ledc_periph_signal[speed_mode].sig_out0_idx + ledc_channel, output_invert, 0);
 
     return ret;
 }

components/hal/include/hal/ledc_types.h

@@ -134,6 +134,10 @@ typedef struct {
     ledc_timer_t timer_sel;         /*!< Select the timer source of channel (0 - 3) */
     uint32_t duty;                  /*!< LEDC channel duty, the range of duty setting is [0, (2**duty_resolution)] */
     int hpoint;                     /*!< LEDC channel hpoint value, the max value is 0xfffff */
+    struct {
+        unsigned int output_invert: 1;/*!< Enable (1) or disable (0) gpio output invert */
+    } flags;                        /*!< LEDC flags */
+
 } ledc_channel_config_t;
 
 /**

examples/peripherals/ledc/main/ledc_example_main.c

@@ -102,7 +102,8 @@ void app_main(void)
             .gpio_num   = LEDC_HS_CH0_GPIO,
             .speed_mode = LEDC_HS_MODE,
             .hpoint     = 0,
-            .timer_sel  = LEDC_HS_TIMER
+            .timer_sel  = LEDC_HS_TIMER,
+            .flags.output_invert = 0
         },
         {
             .channel    = LEDC_HS_CH1_CHANNEL,
@@ -110,7 +111,8 @@ void app_main(void)
             .gpio_num   = LEDC_HS_CH1_GPIO,
             .speed_mode = LEDC_HS_MODE,
             .hpoint     = 0,
-            .timer_sel  = LEDC_HS_TIMER
+            .timer_sel  = LEDC_HS_TIMER,
+            .flags.output_invert = 0
         },
 #elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
         {
@@ -119,7 +121,8 @@ void app_main(void)
             .gpio_num   = LEDC_LS_CH0_GPIO,
             .speed_mode = LEDC_LS_MODE,
             .hpoint     = 0,
-            .timer_sel  = LEDC_LS_TIMER
+            .timer_sel  = LEDC_LS_TIMER,
+            .flags.output_invert = 0
         },
         {
             .channel    = LEDC_LS_CH1_CHANNEL,
@@ -127,7 +130,8 @@ void app_main(void)
             .gpio_num   = LEDC_LS_CH1_GPIO,
             .speed_mode = LEDC_LS_MODE,
             .hpoint     = 0,
-            .timer_sel  = LEDC_LS_TIMER
+            .timer_sel  = LEDC_LS_TIMER,
+            .flags.output_invert = 0
         },
 #endif
         {
@@ -136,7 +140,8 @@ void app_main(void)
             .gpio_num   = LEDC_LS_CH2_GPIO,
             .speed_mode = LEDC_LS_MODE,
             .hpoint     = 0,
-            .timer_sel  = LEDC_LS_TIMER
+            .timer_sel  = LEDC_LS_TIMER,
+            .flags.output_invert = 1
         },
         {
             .channel    = LEDC_LS_CH3_CHANNEL,
@@ -144,7 +149,8 @@ void app_main(void)
             .gpio_num   = LEDC_LS_CH3_GPIO,
             .speed_mode = LEDC_LS_MODE,
             .hpoint     = 0,
-            .timer_sel  = LEDC_LS_TIMER
+            .timer_sel  = LEDC_LS_TIMER,
+            .flags.output_invert = 1
         },
     };