435 lines
16 KiB
C
435 lines
16 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef _DRIVER_LEDC_H_
|
|
#define _DRIVER_LEDC_H_
|
|
#include "esp_err.h"
|
|
#include "soc/soc.h"
|
|
#include "soc/ledc_reg.h"
|
|
#include "soc/ledc_reg.h"
|
|
#include "soc/ledc_struct.h"
|
|
#include "driver/gpio.h"
|
|
#include "driver/periph_ctrl.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define LEDC_APB_CLK_HZ (APB_CLK_FREQ)
|
|
#define LEDC_REF_CLK_HZ (1*1000000)
|
|
|
|
typedef enum {
|
|
LEDC_HIGH_SPEED_MODE = 0, /*!< LEDC high speed speed_mode */
|
|
//in this version, we only support high speed speed_mode. We will access low speed speed_mode later
|
|
//LEDC_LOW_SPEED_MODE, /*!< LEDC low speed speed_mode */
|
|
LEDC_SPEED_MODE_MAX, /*!< LEDC speed limit */
|
|
} ledc_mode_t;
|
|
|
|
typedef enum {
|
|
LEDC_INTR_DISABLE = 0, /*!< Disable LEDC interrupt */
|
|
LEDC_INTR_FADE_END, /*!< Enable LEDC interrupt */
|
|
} ledc_intr_type_t;
|
|
|
|
typedef enum {
|
|
LEDC_DUTY_DIR_DECREASE = 0, /*!< LEDC duty decrease direction */
|
|
LEDC_DUTY_DIR_INCREASE = 1, /*!< LEDC duty increase direction */
|
|
} ledc_duty_direction_t;
|
|
|
|
typedef enum {
|
|
LEDC_REF_TICK = 0, /*!< LEDC timer clock divided from reference tick(1Mhz) */
|
|
LEDC_APB_CLK, /*!< LEDC timer clock divided from APB clock(80Mhz)*/
|
|
} ledc_clk_src_t;
|
|
|
|
typedef enum {
|
|
LEDC_TIMER_0 = 0, /*!< LEDC source timer TIMER0 */
|
|
LEDC_TIMER_1, /*!< LEDC source timer TIMER1 */
|
|
LEDC_TIMER_2, /*!< LEDC source timer TIMER2 */
|
|
LEDC_TIMER_3, /*!< LEDC source timer TIMER3 */
|
|
} ledc_timer_t;
|
|
|
|
typedef enum {
|
|
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_t;
|
|
|
|
typedef enum {
|
|
LEDC_TIMER_10_BIT = 10, /*!< LEDC PWM depth 10Bit */
|
|
LEDC_TIMER_11_BIT = 11, /*!< LEDC PWM depth 11Bit */
|
|
LEDC_TIMER_12_BIT = 12, /*!< LEDC PWM depth 12Bit */
|
|
LEDC_TIMER_13_BIT = 13, /*!< LEDC PWM depth 13Bit */
|
|
LEDC_TIMER_14_BIT = 14, /*!< LEDC PWM depth 14Bit */
|
|
LEDC_TIMER_15_BIT = 15, /*!< LEDC PWM depth 15Bit */
|
|
} ledc_timer_bit_t;
|
|
|
|
/**
|
|
* @brief Configuration parameters of LEDC channel for ledc_channel_config function
|
|
*/
|
|
typedef struct {
|
|
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 duty range is [0, (2**bit_num) - 1], */
|
|
} ledc_channel_config_t;
|
|
|
|
/**
|
|
* @brief Configuration parameters of LEDC Timer timer for ledc_timer_config function
|
|
*/
|
|
typedef struct {
|
|
ledc_mode_t speed_mode; /*!< LEDC speed speed_mode, high-speed mode or low-speed mode*/
|
|
ledc_timer_bit_t bit_num; /*!< LEDC channel duty depth*/
|
|
ledc_timer_t timer_num; /*!< The timer source of channel (0 - 3)*/
|
|
uint32_t freq_hz; /*!< LEDC timer frequency(Hz)*/
|
|
} ledc_timer_config_t;
|
|
|
|
|
|
/**
|
|
* @brief LEDC channel configuration
|
|
*
|
|
* User this Function, configure LEDC channel with the given channel/output gpio_num/interrupt/source timer/frequency(Hz)/LEDC depth
|
|
*
|
|
* @param ledc_conf Pointer of LEDC channel configure struct
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*
|
|
*/
|
|
esp_err_t ledc_channel_config(ledc_channel_config_t* ledc_conf);
|
|
|
|
/**
|
|
* @brief LEDC timer configuration
|
|
*
|
|
* User this Function, configure LEDC timer with the given source timer/frequency(Hz)/bit_num
|
|
*
|
|
* @param timer_conf Pointer of LEDC timer configure struct
|
|
*
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
* - ESP_FAIL Can not find a proper pre-divider number base on the given frequency and the current bit_num.
|
|
*
|
|
*/
|
|
esp_err_t ledc_timer_config(ledc_timer_config_t* timer_conf);
|
|
|
|
/**
|
|
* @brief LEDC update channel parameters
|
|
*
|
|
* Call this function to activate the LEDC updated parameters.
|
|
* After ledc_set_duty, ledc_set_fade, we need to call this function to update the settings.
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param channel LEDC channel(0-7), select from ledc_channel_t
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*
|
|
*/
|
|
esp_err_t ledc_update_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
|
|
|
|
/**
|
|
* @brief LEDC stop
|
|
*
|
|
* Disable LEDC output, and set idle level
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param channel LEDC channel(0-7), select from ledc_channel_t
|
|
*
|
|
* @param idle_level Set output idle level after LEDC stops.
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*/
|
|
esp_err_t ledc_stop(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t idle_level);
|
|
|
|
/**
|
|
* @brief LEDC set channel frequency(Hz)
|
|
*
|
|
* Set LEDC frequency(Hz)
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param timer_num LEDC timer index(0-3), select from ledc_timer_t
|
|
*
|
|
* @param freq_hz Set the LEDC frequency
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
* - ESP_FAIL Can not find a proper pre-divider number base on the given frequency and the current bit_num.
|
|
*/
|
|
esp_err_t ledc_set_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num, uint32_t freq_hz);
|
|
|
|
/**
|
|
* @brief LEDC get channel frequency(Hz)
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param timer_num LEDC timer index(0-3), select from ledc_timer_t
|
|
*
|
|
* @return
|
|
* - 0 error
|
|
* - Others Current LEDC frequency
|
|
*
|
|
*/
|
|
uint32_t ledc_get_freq(ledc_mode_t speed_mode, ledc_timer_t timer_num);
|
|
|
|
/**
|
|
* @brief LEDC set duty
|
|
*
|
|
* Set LEDC duty, After the function calls the ledc_update_duty function, the function can take effect.
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param channel LEDC channel(0-7), select from ledc_channel_t
|
|
*
|
|
* @param duty Set the LEDC duty, the duty range is [0, (2**bit_num) - 1]
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*/
|
|
esp_err_t ledc_set_duty(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty);
|
|
|
|
/**
|
|
* @brief LEDC get duty
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param channel LEDC channel(0-7), select from ledc_channel_t
|
|
*
|
|
*
|
|
* @return
|
|
* - (-1) parameter error
|
|
* - Others Current LEDC duty
|
|
*
|
|
*/
|
|
int ledc_get_duty(ledc_mode_t speed_mode, ledc_channel_t channel);
|
|
|
|
/**
|
|
* @brief LEDC set gradient
|
|
*
|
|
* Set LEDC gradient, After the function calls the ledc_update_duty function, the function can take effect.
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param channel LEDC channel(0-7), select from ledc_channel_t
|
|
*
|
|
* @param duty Set the start of the gradient duty, the duty range is [0, (2**bit_num) - 1]
|
|
*
|
|
* @param gradule_direction Set the direction of the gradient
|
|
*
|
|
* @param step_num Set the number of the gradient
|
|
*
|
|
* @param duty_cyle_num Set how many LEDC tick each time the gradient lasts
|
|
*
|
|
* @param duty_scale Set gradient change amplitude
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
*/
|
|
esp_err_t ledc_set_fade(ledc_mode_t speed_mode, uint32_t channel, uint32_t duty, ledc_duty_direction_t gradule_direction,
|
|
uint32_t step_num, uint32_t duty_cyle_num, uint32_t duty_scale);
|
|
|
|
/**
|
|
* @brief register LEDC interrupt handler, the handler is an ISR.
|
|
* The handler will be attached to the same CPU core that this function is running on.
|
|
* @note
|
|
* Users should know that which CPU is running and then pick a INUM that is not used by system.
|
|
* We can find the information of INUM and interrupt level in soc.h.
|
|
* @param ledc_intr_num LEDC interrupt number, check the info in soc.h, and please see the core-isa.h for more details
|
|
* @param fn Interrupt handler function.
|
|
* @note
|
|
* Note that the handler function MUST be defined with attribution of "IRAM_ATTR".
|
|
* @param arg Parameter for handler function
|
|
*
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Function pointer error.
|
|
*/
|
|
esp_err_t ledc_isr_register(uint32_t ledc_intr_num, void (*fn)(void*), void * arg);
|
|
|
|
/**
|
|
* @brief configure LEDC settings
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param timer_sel Timer index(0-3), there are 4 timers in LEDC module
|
|
*
|
|
* @param div_num Timer clock divide number, the timer clock is divided from the selected clock source
|
|
*
|
|
* @param bit_num The count number of one period, counter range is 0 ~ ((2 ** bit_num) - 1)
|
|
*
|
|
* @param clk_src Select LEDC source clock.
|
|
*
|
|
* @return
|
|
* - (-1) Parameter error
|
|
* - Other Current LEDC duty
|
|
*
|
|
*/
|
|
esp_err_t ledc_timer_set(ledc_mode_t speed_mode, ledc_timer_t timer_sel, uint32_t div_num, uint32_t bit_num, ledc_clk_src_t clk_src);
|
|
|
|
/**
|
|
* @brief reset LEDC timer
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param timer_sel LEDC timer index(0-3), select from ledc_timer_t
|
|
*
|
|
*
|
|
* @return
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
* - ESP_OK Success
|
|
*
|
|
*/
|
|
esp_err_t ledc_timer_rst(ledc_mode_t speed_mode, uint32_t timer_sel);
|
|
|
|
/**
|
|
* @brief pause LEDC timer counter
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param timer_sel LEDC timer index(0-3), select from ledc_timer_t
|
|
*
|
|
*
|
|
* @return
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
* - ESP_OK Success
|
|
*
|
|
*/
|
|
esp_err_t ledc_timer_pause(ledc_mode_t speed_mode, uint32_t timer_sel);
|
|
|
|
/**
|
|
* @brief pause LEDC timer resume
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param timer_sel LEDC timer index(0-3), select from ledc_timer_t
|
|
*
|
|
*
|
|
* @return
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
* - ESP_OK Success
|
|
*
|
|
*/
|
|
esp_err_t ledc_timer_resume(ledc_mode_t speed_mode, uint32_t timer_sel);
|
|
|
|
/**
|
|
* @brief bind LEDC channel with the selected timer
|
|
*
|
|
* @param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode, now we only support high-speed mode. We will access low-speed mode in next version
|
|
*
|
|
* @param channel LEDC channel index(0-7), select from ledc_channel_t
|
|
*
|
|
* @param timer_idx LEDC timer index(0-3), select from ledc_timer_t
|
|
*
|
|
*
|
|
* @return
|
|
* - ESP_ERR_INVALID_ARG Parameter error
|
|
* - ESP_OK Success
|
|
*
|
|
*/
|
|
esp_err_t ledc_bind_channel_timer(ledc_mode_t speed_mode, uint32_t channel, uint32_t timer_idx);
|
|
|
|
/***************************EXAMPLE**********************************
|
|
*
|
|
*
|
|
* ----------------EXAMPLE OF LEDC SETTING ---------------------
|
|
* @code{c}
|
|
* //1. enable LEDC
|
|
* //enable LEDC module, or you can not set any register of it.
|
|
* periph_module_enable(PERIPH_LEDC_MODULE);
|
|
* @endcode
|
|
*
|
|
* @code{c}
|
|
* //2. set LEDC timer
|
|
* ledc_timer_config_t timer_conf = {
|
|
* .bit_num = LEDC_TIMER_12_BIT, //set timer counter bit number
|
|
* .freq_hz = 1000, //set frequency of pwm, here, 1000Hz
|
|
* .speed_mode = LEDC_HIGH_SPEED_MODE, //timer mode,
|
|
* .timer_num = LEDC_TIMER_0, //timer number
|
|
* };
|
|
* ledc_timer_config(&timer_conf); //setup timer.
|
|
* @endcode
|
|
*
|
|
* @code{c}
|
|
* //3. set LEDC channel
|
|
* ledc_channel_config_t ledc_conf = {
|
|
* .channel = LEDC_CHANNEL_0; //set LEDC channel 0
|
|
* .duty = 1000; //set the duty for initialization.(duty range is 0 ~ ((2**bit_num)-1)
|
|
* .gpio_num = 16; //GPIO number
|
|
* .intr_type = LEDC_INTR_FADE_END; //GPIO INTR TYPE, as an example, we enable fade_end interrupt here.
|
|
* .speed_mode = LEDC_HIGH_SPEED_MODE; //set LEDC mode, from ledc_mode_t
|
|
* .timer_sel = LEDC_TIMER_0; //set LEDC timer source, if different channel use one timer, the frequency and bit_num of these channels should be the same
|
|
* }
|
|
* ledc_channel_config(&ledc_conf); //setup the configuration
|
|
*
|
|
* ----------------EXAMPLE OF SETTING DUTY --- -----------------
|
|
* @code{c}
|
|
* uint32_t ledc_channel = LEDC_CHANNEL_0; //LEDC channel(0-73)
|
|
* uint32_t duty = 2000; //duty range is 0 ~ ((2**bit_num)-1)
|
|
* LEDC_set_duty(LEDC_HIGH_SPEED_MODE, ledc_channel, duty); //set speed mode, channel, and duty.
|
|
* ledc_update_duty(LEDC_HIGH_SPEED_MODE, ledc_channel); //after set duty, we need to call ledc_update_duty to update the settings.
|
|
* @endcode
|
|
*
|
|
* ----------------EXAMPLE OF LEDC INTERRUPT ------------------
|
|
* @code{c}
|
|
* //we have fade_end interrupt and counter overflow interrupt. we just give an example of fade_end interrupt here.
|
|
* ledc_isr_register(18, ledc_isr_handler, NULL); //hook the isr handler for LEDC interrupt
|
|
* @endcode
|
|
* @note
|
|
* 1. the first parameter is INUM, you can pick one form interrupt level 1/2 which is not used by the system.
|
|
* 2. user should arrange the INUMs that used, better not to use a same INUM for different interrupt source.
|
|
* 3. do not pick the INUM that already occupied by the system.
|
|
* 4. refer to soc.h to check which INUMs that can be used.
|
|
*
|
|
* ----------------EXAMPLE OF INTERRUPT HANDLER ---------------
|
|
* @code{c}
|
|
* #include "esp_attr.h"
|
|
* void IRAM_ATTR ledc_isr_handler(void* arg) //we should add 'IRAM_ATTR' attribution when we declare the isr function
|
|
* {
|
|
* uint32_t intr_st = LEDC.int_st.val; //read LEDC interrupt status.
|
|
*
|
|
* //you will find which channels have triggered fade_end interrupt here,
|
|
* //then, you can post some event to RTOS queue to process the event.
|
|
* //later we will add a queue in the driver code.
|
|
*
|
|
* LEDC.int_clr.val = intr_st; //clear LEDC interrupt status.
|
|
* }
|
|
* @endcode
|
|
*
|
|
*--------------------------END OF EXAMPLE --------------------------
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _DRIVER_LEDC_H_ */
|