mirror of
https://github.com/espressif/ESP8266_RTOS_SDK.git
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132 lines
4.5 KiB
C
132 lines
4.5 KiB
C
// Copyright 2018-2025 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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//
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/queue.h"
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#include "freertos/task.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "driver/ledc.h"
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#define LEDC_HS_CH0_GPIO (13)
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#define LEDC_HS_CH1_GPIO (14)
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#define LEDC_LS_CH2_GPIO (15)
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#define LEDC_LS_CH3_GPIO (12)
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#define LEDC_HS_CH0_CHANNEL LEDC_CHANNEL_0
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#define LEDC_HS_CH1_CHANNEL LEDC_CHANNEL_1
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#define LEDC_LS_CH2_CHANNEL LEDC_CHANNEL_2
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#define LEDC_LS_CH3_CHANNEL LEDC_CHANNEL_3
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#define LEDC_TEST_CH_NUM (4)
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#define LEDC_TEST_FREQ (1000) //1KHz
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#define LEDC_TEST_DUTY (900) //duty = LEDC_TEST_DUTY / LEDC_TEST_PERIOD & LEDC_TEST_PERIOD = 1,000,000 / LEDC_TEST_FREQ
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#define LEDC_TEST_FADE_TIME (3000)
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static const char* TAG = "main";
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void app_main()
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{
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int ch;
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/*
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* Prepare and set configuration of timers
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* that will be used by LED Controller
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*/
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ledc_timer_config_t ledc_timer = {
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.duty_resolution = LEDC_TIMER_1_BIT, // resolution of PWM duty(Invalid parameter, compatible with esp32 API)
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.freq_hz = LEDC_TEST_FREQ, // frequency of PWM signal
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.speed_mode = 0, // timer mode (Invalid parameter, compatible with esp32 API)
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.timer_num = 0 // timer index (Invalid parameter, compatible with esp32 API)
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};
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// Set configuration of timer0 for high speed channels
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ledc_timer_config(&ledc_timer);
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/*
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* Prepare individual configuration
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* for each channel of LED Controller
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* by selecting:
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* - controller's channel number
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* - output duty cycle, set initially to 0
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* - GPIO number where LED is connected to
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* - speed mode, either high or low
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* - timer servicing selected channel
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* Note: Speed_mode and timer_sel are only compatible with esp32,
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* but it is not required in esp8266, so it can be set to 0 when
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* using esp8266
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*/
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ledc_channel_config_t ledc_channel[LEDC_TEST_CH_NUM] = {
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{ .channel = LEDC_HS_CH0_CHANNEL,
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.duty = 0,
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.gpio_num = LEDC_HS_CH0_GPIO,
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.speed_mode = 0,
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.timer_sel = 0 },
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{ .channel = LEDC_HS_CH1_CHANNEL,
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.duty = 0,
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.gpio_num = LEDC_HS_CH1_GPIO,
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.speed_mode = 0,
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.timer_sel = 0 },
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{ .channel = LEDC_LS_CH2_CHANNEL,
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.duty = 0,
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.gpio_num = LEDC_LS_CH2_GPIO,
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.speed_mode = 0,
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.timer_sel = 0 },
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{ .channel = LEDC_LS_CH3_CHANNEL,
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.duty = 0,
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.gpio_num = LEDC_LS_CH3_GPIO,
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.speed_mode = 0,
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.timer_sel = 0 },
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};
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// Set LED Controller with previously prepared configuration
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for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
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ledc_channel_config(&ledc_channel[ch]);
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}
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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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ESP_LOGI(TAG, "1. LEDC fade up to duty = %d\n", LEDC_TEST_DUTY);
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for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
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ledc_set_fade_with_time(ledc_channel[ch].speed_mode,
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ledc_channel[ch].channel, LEDC_TEST_DUTY, LEDC_TEST_FADE_TIME);
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}
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for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
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ledc_fade_start(ledc_channel[ch].speed_mode,
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ledc_channel[ch].channel, LEDC_FADE_NO_WAIT);
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}
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vTaskDelay(LEDC_TEST_FADE_TIME / portTICK_PERIOD_MS);
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vTaskDelay(LEDC_TEST_FADE_TIME / portTICK_PERIOD_MS);
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ESP_LOGI(TAG, "2. LEDC fade down to duty = 0\n");
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for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
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ledc_set_fade_with_time(ledc_channel[ch].speed_mode,
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ledc_channel[ch].channel, 0, LEDC_TEST_FADE_TIME);
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}
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for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
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ledc_fade_start(ledc_channel[ch].speed_mode,
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ledc_channel[ch].channel, LEDC_FADE_NO_WAIT);
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}
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vTaskDelay(LEDC_TEST_FADE_TIME / portTICK_PERIOD_MS);
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vTaskDelay(LEDC_TEST_FADE_TIME / portTICK_PERIOD_MS);
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}
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}
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