132 lines
5.2 KiB
C
132 lines
5.2 KiB
C
/* Ledc fade example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/xtensa_api.h"
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#include "freertos/queue.h"
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#include "driver/ledc.h"
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#include "esp_attr.h"
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#include "esp_err.h"
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/*
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* About this example
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* 1. init LEDC module:
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* a. You need to set the timer of LEDC first, this decide the frequency and resolution of PWM.
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* b. You need to set the LEDC channel you want to use, and bind with one of the timers.
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*
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* 2. You can install a default fade function, then you can use fade APIs.
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*
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* 3. You can also set a target duty directly without fading.
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*
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* 4. This example use GPIO18/19/4/5 as LEDC ouput, and it will change the duty repeatedly.
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*
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*
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*/
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#define LEDC_IO_0 (18)
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#define LEDC_IO_1 (19)
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#define LEDC_IO_2 (4)
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#define LEDC_IO_3 (5)
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esp_err_t app_main()
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{
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ledc_timer_config_t ledc_timer = {
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//set timer counter bit number
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.bit_num = LEDC_TIMER_13_BIT,
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//set frequency of pwm
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.freq_hz = 5000,
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//timer mode,
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.speed_mode = LEDC_HIGH_SPEED_MODE,
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//timer index
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.timer_num = LEDC_TIMER_0
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};
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ledc_timer_config(&ledc_timer);
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ledc_channel_config_t ledc_channel = {
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//set LEDC channel 0
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.channel = LEDC_CHANNEL_0,
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//set the duty for initialization.(duty range is 0 ~ ((2**bit_num)-1)
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.duty = 100,
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//GPIO number
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.gpio_num = LEDC_IO_0,
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//GPIO INTR TYPE, as an example, we enable fade_end interrupt here.
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.intr_type = LEDC_INTR_FADE_END,
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//set LEDC mode, from ledc_mode_t
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.speed_mode = LEDC_HIGH_SPEED_MODE,
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//set LEDC timer source, if different channel use one timer,
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//the frequency and bit_num of these channels should be the same
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.timer_sel = LEDC_TIMER_0
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};
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//set the configuration
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ledc_channel_config(&ledc_channel);
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//config ledc channel1
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ledc_channel.channel = LEDC_CHANNEL_1;
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ledc_channel.gpio_num = LEDC_IO_1;
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ledc_channel_config(&ledc_channel);
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//config ledc channel2
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ledc_channel.channel = LEDC_CHANNEL_2;
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ledc_channel.gpio_num = LEDC_IO_2;
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ledc_channel_config(&ledc_channel);
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//config ledc channel3
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ledc_channel.channel = LEDC_CHANNEL_3;
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ledc_channel.gpio_num = LEDC_IO_3;
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ledc_channel_config(&ledc_channel);
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//initialize fade service.
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ledc_fade_func_install(0);
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while(1) {
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printf("LEDC fade up\n");
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 1000, 2000);
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 7000, 2000);
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 5000, 2000);
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 3000, 2000);
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ledc_fade_start(LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT);
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ledc_fade_start(LEDC_CHANNEL_1, LEDC_FADE_NO_WAIT);
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ledc_fade_start(LEDC_CHANNEL_2, LEDC_FADE_NO_WAIT);
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ledc_fade_start(LEDC_CHANNEL_3, LEDC_FADE_NO_WAIT);
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vTaskDelay(3000 / portTICK_PERIOD_MS);
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printf("LEDC fade down\n");
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 100, 2000);
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 300, 2000);
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 500, 2000);
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ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 700, 2000);
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ledc_fade_start(LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT);
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ledc_fade_start(LEDC_CHANNEL_1, LEDC_FADE_NO_WAIT);
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ledc_fade_start(LEDC_CHANNEL_2, LEDC_FADE_NO_WAIT);
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ledc_fade_start(LEDC_CHANNEL_3, LEDC_FADE_NO_WAIT);
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vTaskDelay(3000 / portTICK_PERIOD_MS);
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printf("LEDC set duty without fade\n");
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 1000);
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 7000);
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 5000);
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 3000);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3);
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vTaskDelay(2000 / portTICK_PERIOD_MS);
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printf("LEDC set duty without fade\n");
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 0);
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 0);
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 0);
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ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 0);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2);
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ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3);
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vTaskDelay(2000 / portTICK_PERIOD_MS);
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}
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}
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