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424 lines
19 KiB
C
424 lines
19 KiB
C
// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "esp_err.h"
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#include "esp_intr_alloc.h"
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#include "soc/soc.h"
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#include "hal/ledc_types.h"
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#include "driver/gpio.h"
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#include "driver/periph_ctrl.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define LEDC_APB_CLK_HZ (APB_CLK_FREQ)
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#define LEDC_REF_CLK_HZ (REF_CLK_FREQ)
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#define LEDC_ERR_DUTY (0xFFFFFFFF)
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#define LEDC_ERR_VAL (-1)
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typedef intr_handle_t ledc_isr_handle_t;
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/**
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* @brief LEDC channel configuration
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* Configure LEDC channel with the given channel/output gpio_num/interrupt/source timer/frequency(Hz)/LEDC duty resolution
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*
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* @param ledc_conf Pointer of LEDC channel configure struct
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t ledc_channel_config(const ledc_channel_config_t* ledc_conf);
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/**
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* @brief LEDC timer configuration
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* Configure LEDC timer with the given source timer/frequency(Hz)/duty_resolution
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*
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* @param timer_conf Pointer of LEDC timer configure struct
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_FAIL Can not find a proper pre-divider number base on the given frequency and the current duty_resolution.
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*/
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esp_err_t ledc_timer_config(const ledc_timer_config_t* timer_conf);
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/**
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* @brief LEDC update channel parameters
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* @note Call this function to activate the LEDC updated parameters.
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* After ledc_set_duty, we need to call this function to update the settings.
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* @note ledc_set_duty, ledc_set_duty_with_hpoint and ledc_update_duty are not thread-safe, do not call these functions to
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* control one LEDC channel in different tasks at the same time.
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* A thread-safe version of API is ledc_set_duty_and_update
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*
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*/
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esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
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/**
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* @brief Set LEDC output gpio.
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*
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* @param gpio_num The LEDC output gpio
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param ledc_channel LEDC channel (0-7), select from ledc_channel_t
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t ledc_set_pin(int gpio_num, ledc_mode_t speed_mode, ledc_channel_t ledc_channel);
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/**
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* @brief LEDC stop.
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* Disable LEDC output, and set idle level
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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* @param idle_level Set output idle level after LEDC stops.
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idle_level);
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/**
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* @brief LEDC set channel frequency (Hz)
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param timer_num LEDC timer index (0-3), select from ledc_timer_t
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* @param freq_hz Set the LEDC frequency
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_FAIL Can not find a proper pre-divider number base on the given frequency and the current duty_resolution.
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*/
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esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz);
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/**
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* @brief LEDC get channel frequency (Hz)
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param timer_num LEDC timer index (0-3), select from ledc_timer_t
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*
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* @return
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* - 0 error
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* - Others Current LEDC frequency
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*/
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uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num);
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/**
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* @brief LEDC set duty and hpoint value
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* Only after calling ledc_update_duty will the duty update.
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* @note ledc_set_duty, ledc_set_duty_with_hpoint and ledc_update_duty are not thread-safe, do not call these functions to
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* control one LEDC channel in different tasks at the same time.
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* A thread-safe version of API is ledc_set_duty_and_update
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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* @param duty Set the LEDC duty, the range of duty setting is [0, (2**duty_resolution)]
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* @param hpoint Set the LEDC hpoint value(max: 0xfffff)
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t ledc_set_duty_with_hpoint(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, uint32_t hpoint);
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/**
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* @brief LEDC get hpoint value, the counter value when the output is set high level.
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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* @return
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* - LEDC_ERR_VAL if parameter error
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* - Others Current hpoint value of LEDC channel
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*/
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int ledc_get_hpoint(ledc_mode_t speed_mode, ledc_channel_t channel);
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/**
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* @brief LEDC set duty
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* This function do not change the hpoint value of this channel. if needed, please call ledc_set_duty_with_hpoint.
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* only after calling ledc_update_duty will the duty update.
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* @note ledc_set_duty, ledc_set_duty_with_hpoint and ledc_update_duty are not thread-safe, do not call these functions to
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* control one LEDC channel in different tasks at the same time.
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* A thread-safe version of API is ledc_set_duty_and_update.
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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* @param duty Set the LEDC duty, the range of duty setting is [0, (2**duty_resolution)]
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty);
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/**
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* @brief LEDC get duty
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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*
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* @return
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* - LEDC_ERR_DUTY if parameter error
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* - Others Current LEDC duty
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*/
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uint32_t ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
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/**
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* @brief LEDC set gradient
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* Set LEDC gradient, After the function calls the ledc_update_duty function, the function can take effect.
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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* @param duty Set the start of the gradient duty, the range of duty setting is [0, (2**duty_resolution)]
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* @param fade_direction Set the direction of the gradient
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* @param step_num Set the number of the gradient
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* @param duty_cycle_num Set how many LEDC tick each time the gradient lasts
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* @param duty_scale Set gradient change amplitude
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t ledc_set_fade(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, ledc_duty_direction_t fade_direction,
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uint32_t step_num, uint32_t duty_cycle_num, uint32_t duty_scale);
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/**
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* @brief Register LEDC interrupt handler, the handler is an ISR.
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* The handler will be attached to the same CPU core that this function is running on.
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*
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* @param fn Interrupt handler function.
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* @param arg User-supplied argument passed to the handler function.
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* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
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* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
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* @param handle Pointer to return handle. If non-NULL, a handle for the interrupt will
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* be returned here.
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Function pointer error.
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*/
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esp_err_t ledc_isr_register(void (*fn)(void*), void * arg, int intr_alloc_flags, ledc_isr_handle_t *handle);
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/**
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* @brief Configure LEDC settings
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param timer_sel Timer index (0-3), there are 4 timers in LEDC module
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* @param clock_divider Timer clock divide value, the timer clock is divided from the selected clock source
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* @param duty_resolution Resolution of duty setting in number of bits. The range of duty values is [0, (2**duty_resolution)]
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* @param clk_src Select LEDC source clock.
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*
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* @return
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* - (-1) Parameter error
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* - Other Current LEDC duty
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*/
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esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_t clock_divider, uint32_t duty_resolution, ledc_clk_src_t clk_src);
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/**
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* @brief Reset LEDC timer
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param timer_sel LEDC timer index (0-3), select from ledc_timer_t
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*
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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*/
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esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, ledc_timer_t timer_sel);
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/**
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* @brief Pause LEDC timer counter
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param timer_sel LEDC timer index (0-3), select from ledc_timer_t
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*
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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*
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*/
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esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, ledc_timer_t timer_sel);
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/**
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* @brief Resume LEDC timer
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param timer_sel LEDC timer index (0-3), select from ledc_timer_t
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*
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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*/
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esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, ledc_timer_t timer_sel);
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/**
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* @brief Bind LEDC channel with the selected timer
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel index (0-7), select from ledc_channel_t
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* @param timer_sel LEDC timer index (0-3), select from ledc_timer_t
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*
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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*/
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esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_timer_t timer_sel);
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/**
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* @brief Set LEDC fade function.
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* @note Call ledc_fade_func_install() once before calling this function.
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* Call ledc_fade_start() after this to start fading.
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* @note ledc_set_fade_with_step, ledc_set_fade_with_time and ledc_fade_start are not thread-safe, do not call these functions to
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* control one LEDC channel in different tasks at the same time.
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* A thread-safe version of API is ledc_set_fade_step_and_start
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode. ,
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* @param channel LEDC channel index (0-7), select from ledc_channel_t
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* @param target_duty Target duty of fading [0, (2**duty_resolution) - 1]
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* @param scale Controls the increase or decrease step scale.
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* @param cycle_num increase or decrease the duty every cycle_num cycles
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*
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Fade function not installed.
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* - ESP_FAIL Fade function init error
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*/
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esp_err_t ledc_set_fade_with_step(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t scale, uint32_t cycle_num);
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/**
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* @brief Set LEDC fade function, with a limited time.
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* @note Call ledc_fade_func_install() once before calling this function.
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* Call ledc_fade_start() after this to start fading.
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* @note ledc_set_fade_with_step, ledc_set_fade_with_time and ledc_fade_start are not thread-safe, do not call these functions to
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* control one LEDC channel in different tasks at the same time.
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* A thread-safe version of API is ledc_set_fade_step_and_start
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode. ,
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* @param channel LEDC channel index (0-7), select from ledc_channel_t
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* @param target_duty Target duty of fading.( 0 - (2 ** duty_resolution - 1)))
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* @param max_fade_time_ms The maximum time of the fading ( ms ).
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*
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Fade function not installed.
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* - ESP_FAIL Fade function init error
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*/
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esp_err_t ledc_set_fade_with_time(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, int max_fade_time_ms);
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/**
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* @brief Install LEDC fade function. This function will occupy interrupt of LEDC module.
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* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
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* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Fade function already installed.
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*/
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esp_err_t ledc_fade_func_install(int intr_alloc_flags);
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/**
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* @brief Uninstall LEDC fade function.
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*
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*/
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void ledc_fade_func_uninstall(void);
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/**
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* @brief Start LEDC fading.
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* @note Call ledc_fade_func_install() once before calling this function.
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* Call this API right after ledc_set_fade_with_time or ledc_set_fade_with_step before to start fading.
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel number
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* @param fade_mode Whether to block until fading done.
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*
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Fade function not installed.
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* - ESP_ERR_INVALID_ARG Parameter error.
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*/
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esp_err_t ledc_fade_start(ledc_mode_t speed_mode, ledc_channel_t channel, ledc_fade_mode_t fade_mode);
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/**
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* @brief A thread-safe API to set duty for LEDC channel and return when duty updated.
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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*
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel (0-7), select from ledc_channel_t
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* @param duty Set the LEDC duty, the range of duty setting is [0, (2**duty_resolution)]
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* @param hpoint Set the LEDC hpoint value(max: 0xfffff)
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*
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*/
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esp_err_t ledc_set_duty_and_update(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty, uint32_t hpoint);
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/**
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* @brief A thread-safe API to set and start LEDC fade function, with a limited time.
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* @note Call ledc_fade_func_install() once, before calling this function.
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel index (0-7), select from ledc_channel_t
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* @param target_duty Target duty of fading.( 0 - (2 ** duty_resolution - 1)))
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* @param max_fade_time_ms The maximum time of the fading ( ms ).
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* @param fade_mode choose blocking or non-blocking mode
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Fade function not installed.
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* - ESP_FAIL Fade function init error
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*/
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esp_err_t ledc_set_fade_time_and_start(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t max_fade_time_ms, ledc_fade_mode_t fade_mode);
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/**
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* @brief A thread-safe API to set and start LEDC fade function.
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* @note Call ledc_fade_func_install() once before calling this function.
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* @note If a fade operation is running in progress on that channel, the driver would not allow it to be stopped.
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* Other duty operations will have to wait until the fade operation has finished.
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* @param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode.
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* @param channel LEDC channel index (0-7), select from ledc_channel_t
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* @param target_duty Target duty of fading [0, (2**duty_resolution) - 1]
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* @param scale Controls the increase or decrease step scale.
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* @param cycle_num increase or decrease the duty every cycle_num cycles
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* @param fade_mode choose blocking or non-blocking mode
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* @return
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_OK Success
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* - ESP_ERR_INVALID_STATE Fade function not installed.
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* - ESP_FAIL Fade function init error
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*/
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esp_err_t ledc_set_fade_step_and_start(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t target_duty, uint32_t scale, uint32_t cycle_num, ledc_fade_mode_t fade_mode);
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#ifdef __cplusplus
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}
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#endif
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