57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/**
|
|
* @file pwm_breath_led.c
|
|
* @brief
|
|
*
|
|
* Copyright (c) 2021 Bouffalolab team
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you 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.
|
|
*
|
|
*/
|
|
#include "hal_pwm.h"
|
|
#include "hal_gpio.h"
|
|
|
|
static void pwm_irq_callback(struct device *dev, void *args, uint32_t size, uint32_t state)
|
|
{
|
|
if (state == PWM_EVENT_COMPLETE) {
|
|
pwm_channel_stop(dev);
|
|
MSG("pwm complete\r\n");
|
|
}
|
|
}
|
|
int main(void)
|
|
{
|
|
bflb_platform_init(0);
|
|
|
|
pwm_register(PWM_CH2_INDEX, "pwm");
|
|
|
|
struct device *pwm = device_find("pwm");
|
|
|
|
if (pwm) {
|
|
PWM_DEV(pwm)->period = 10; //frequence = 32k/(31+1)/10 = 100hz
|
|
PWM_DEV(pwm)->threshold_low = 5;
|
|
PWM_DEV(pwm)->threshold_high = 10;
|
|
PWM_DEV(pwm)->it_pulse_count = 200; //after 2s go isr 2s = 1/100hz*200
|
|
device_open(pwm, DEVICE_OFLAG_INT_TX);
|
|
device_set_callback(pwm, pwm_irq_callback);
|
|
//pwm_it_pulse_count_update(pwm, 200);
|
|
pwm_channel_start(pwm);
|
|
}
|
|
|
|
BL_CASE_SUCCESS;
|
|
while (1) {
|
|
bflb_platform_delay_ms(100);
|
|
}
|
|
}
|