68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/**
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* @file pwm_breath_led.c
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* @brief
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*
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* Copyright (c) 2021 Bouffalolab team
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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*/
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#include "bflb_platform.h"
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#include "hal_pwm.h"
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#include "hal_gpio.h"
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#include "hal_clock.h"
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int main(void)
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{
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pwm_dutycycle_config_t pwm_cfg = {
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0,
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0
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};
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bflb_platform_init(0);
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gpio_set_mode(GPIO_PIN_29, GPIO_OUTPUT_PP_MODE);
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gpio_set_mode(GPIO_PIN_30, GPIO_OUTPUT_PP_MODE);
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gpio_set_mode(GPIO_PIN_31, GPIO_OUTPUT_PP_MODE);
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gpio_write(GPIO_PIN_29, 0);
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gpio_write(GPIO_PIN_30, 0);
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gpio_write(GPIO_PIN_31, 0);
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pwm_register(PWM_CH2_INDEX, "led_breath");
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struct device *led_breath = device_find("led_breath");
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if (led_breath) {
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PWM_DEV(led_breath)->period = 10; //frequence = 32K/(31+1)/10 = 100HZ
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PWM_DEV(led_breath)->threshold_low = 5;
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PWM_DEV(led_breath)->threshold_high = 10;
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device_open(led_breath, DEVICE_OFLAG_STREAM_TX);
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pwm_channel_start(led_breath);
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}
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while (1) {
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for (pwm_cfg.threshold_high = 0; pwm_cfg.threshold_high <= 32; pwm_cfg.threshold_high++) {
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device_control(led_breath, DEVICE_CTRL_PWM_DUTYCYCLE_CONFIG, &pwm_cfg);
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bflb_platform_delay_ms(50);
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}
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for (pwm_cfg.threshold_high = 32; 0 <= pwm_cfg.threshold_high && pwm_cfg.threshold_high <= 32; pwm_cfg.threshold_high--) {
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device_control(led_breath, DEVICE_CTRL_PWM_DUTYCYCLE_CONFIG, &pwm_cfg);
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bflb_platform_delay_ms(50);
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}
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}
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}
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