除了 ESP32 LEDC API 外，還提供了結構件（Structures）、巨集（Marco）、 泛型型別定義（Type Definitions）和枚舉（Enumerations）。
1. Structure：
1.1. struct ledc_channel_config_t：
Configuration parameters of LEDC channel for ledc_channel_config
function.
Public Members
|
Description
|
int gpio_num
|
the LEDC output gpio_num, if you want to use gpio16, gpio_num = 16
|
ledc_mode_t
speed_mode
|
LEDC speed speed_mode, high-speed mode or low-speed mode
|
ledc_channel_t
channel
|
LEDC channel (0 - 7)
|
ledc_intr_type_t
intr_type
|
configure interrupt, Fade interrupt enable or Fade interrupt disable
|
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
|
1.2. struct ledc_timer_config_t：
Configuration parameters of LEDC Timer timer for ledc_timer_config
function.
Public Members
|
Description
|
ledc_mode_t
speed_mode
|
LEDC speed speed_mode, high-speed mode or low-speed mode
|
ledc_timer_bit_t
duty_resolution
|
LEDC channel duty resolution
|
ledc_timer_bit_t
bit_num
|
Deprecated in ESP-IDF 3.0. This is an alias to ‘duty_resolution’ for
backward compatibility with ESP-IDF 2.1
|
ledc_timer_t
timer_num
|
The timer source of channel (0 - 3)
|
uint32_t freq_hz
|
LEDC timer frequency (Hz)
|
2. Macros：
Macros
|
Description
|
LEDC_APB_CLK_HZ
|
|
LEDC_REF_CLK_HZ
|
|
LEDC_ERR_DUTY
|
|
LEDC_ERR_VAL
|
3. Type Definitions：
Type Definitions
|
Description
|
typedef intr_handle_t
ledc_isr_handle_t
|
4. Enumerations：
4.1. enum ledc_mode_t：
Enumeration
|
Description
|
LEDC_HIGH_SPEED_MODE = 0
|
LEDC high speed speed_mode
|
LEDC_LOW_SPEED_MODE
|
LEDC low speed speed_mode
|
LEDC_SPEED_MODE_MAX
|
LEDC speed limit
|
4.2. ledc_intr_type_t：
Enumeration
|
Description
|
LEDC_INTR_DISABLE
= 0
|
Disable LEDC interrupt
|
LEDC_INTR_FADE_END
|
Enable LEDC interrupt
|
4.3. enum ledc_duty_direction_t：
Enumeration
|
Description
|
LEDC_DUTY_DIR_DECREASE
= 0
|
LEDC duty decrease direction
|
LEDC_DUTY_DIR_INCREASE
= 1
|
LEDC duty increase direction
|
LEDC_DUTY_DIR_MAX
|
4.4. enum ledc_clk_src_t：
Enumeration
|
Description
|
LEDC_REF_TICK =
0
|
LEDC timer clock divided from reference tick (1Mhz)
|
LEDC_APB_CLK
|
LEDC timer clock divided from APB clock (80Mhz)
|
4.5. enum ledc_timer_t：
Enumeration
|
Description
|
LEDC_TIMER_0 = 0
|
LEDC timer 0
|
LEDC_TIMER_1
|
LEDC timer 1
|
LEDC_TIMER_2
|
LEDC timer 2
|
LEDC_TIMER_3
|
LEDC timer 3
|
LEDC_TIMER_MAX
|
4.6. enum ledc_channel_t：
Enumeration
|
Description
|
LEDC_CHANNEL_0 = 0
|
LEDC channel 0
|
LEDC_CHANNEL_1
|
LEDC channel 1
|
LEDC_CHANNEL_2
|
LEDC channel 2
|
LEDC_CHANNEL_3
|
LEDC channel 3
|
LEDC_CHANNEL_4
|
LEDC channel 4
|
LEDC_CHANNEL_5
|
LEDC channel 5
|
LEDC_CHANNEL_6
|
LEDC channel 6
|
LEDC_CHANNEL_7
|
LEDC channel 7
|
LEDC_CHANNEL_MAX
|
4.7. enum ledc_timer_bit_t：
Enumeration
|
Description
|
LEDC_TIMER_1_BIT = 1
|
LEDC PWM duty resolution of 1 bits
|
LEDC_TIMER_2_BIT
|
LEDC PWM duty resolution of 2 bits
|
LEDC_TIMER_3_BIT
|
LEDC PWM duty resolution of 3 bits
|
LEDC_TIMER_4_BIT
|
LEDC PWM duty resolution of 4 bits
|
LEDC_TIMER_5_BIT
|
LEDC PWM duty resolution of 5 bits
|
LEDC_TIMER_6_BIT
|
LEDC PWM duty resolution of 6 bits
|
LEDC_TIMER_7_BIT
|
LEDC PWM duty resolution of 7 bits
|
LEDC_TIMER_8_BIT
|
LEDC PWM duty resolution of 8 bits
|
LEDC_TIMER_9_BIT
|
LEDC PWM duty resolution of 9 bits
|
LEDC_TIMER_10_BIT
|
LEDC PWM duty resolution of 10 bits
|
LEDC_TIMER_11_BIT
|
LEDC PWM duty resolution of 11 bits
|
LEDC_TIMER_12_BIT
|
LEDC PWM duty resolution of 12 bits
|
LEDC_TIMER_13_BIT
|
LEDC PWM duty resolution of 13 bits
|
LEDC_TIMER_14_BIT
|
LEDC PWM duty resolution of 14 bits
|
LEDC_TIMER_15_BIT
|
LEDC PWM duty resolution of 15 bits
|
LEDC_TIMER_16_BIT
|
LEDC PWM duty resolution of 16 bits
|
LEDC_TIMER_17_BIT
|
LEDC PWM duty resolution of 17 bits
|
LEDC_TIMER_18_BIT
|
LEDC PWM duty resolution of 18 bits
|
LEDC_TIMER_19_BIT
|
LEDC PWM duty resolution of 19 bits
|
LEDC_TIMER_20_BIT
|
LEDC PWM duty resolution of 20 bits
|
LEDC_TIMER_BIT_MAX
|
4.8. enum ledc_fade_mode_t：
Enumeration
|
Description
|
LEDC_FADE_NO_WAIT
= 0
|
LEDC fade function will return immediately
|
LEDC_FADE_WAIT_DONE
|
LEDC fade function will block until fading to the target duty
|
LEDC_FADE_MAX
|
Header File：driver/include/driver/ledc.h
相關網址：
※ DIY - ESP32：ESP32 LEDC 控制模塊介紹（五十三）
※ DIY - ESP32：ESP32 頻率產生器 Frequency Generator 電路（五十四）
※ DIY - ESP32：ESP32 頻率產生器 Frequency Generator 程式（五十五）
※ DIY - ESP32：ESP32 LEDC 控制 API 函數（五十六）
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