164 lines
4.0 KiB
C
164 lines
4.0 KiB
C
/*
|
|
* File : _pwm.c
|
|
* This file is part of RT-Thread RTOS
|
|
* COPYRIGHT (C) 2018, RT-Thread Development Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2018-05-07 aozima the first version
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include <rtthread.h>
|
|
#include <rtdevice.h>
|
|
|
|
|
|
static rt_err_t _pwm_control(rt_device_t dev, int cmd, void *args)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
struct rt_device_pwm *pwm = (struct rt_device_pwm *)dev;
|
|
|
|
if (pwm->ops->control)
|
|
{
|
|
result = pwm->ops->control(pwm, cmd, args);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
pos: channel
|
|
void *buffer: rt_uint32_t pulse[size]
|
|
size : number of pulse, only set to sizeof(rt_uint32_t).
|
|
*/
|
|
static rt_size_t _pwm_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
struct rt_device_pwm *pwm = (struct rt_device_pwm *)dev;
|
|
rt_uint32_t *pulse = (rt_uint32_t *)buffer;
|
|
struct rt_pwm_configuration configuration={0};
|
|
|
|
configuration.channel = pos;
|
|
|
|
if (pwm->ops->control)
|
|
{
|
|
result = pwm->ops->control(pwm, PWM_CMD_GET, &configuration);
|
|
if (result != RT_EOK)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
*pulse = configuration.pulse;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
/*
|
|
pos: channel
|
|
void *buffer: rt_uint32_t pulse[size]
|
|
size : number of pulse, only set to sizeof(rt_uint32_t).
|
|
*/
|
|
static rt_size_t _pwm_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
struct rt_device_pwm *pwm = (struct rt_device_pwm *)dev;
|
|
rt_uint32_t *pulse = (rt_uint32_t *)buffer;
|
|
struct rt_pwm_configuration configuration={0};
|
|
|
|
configuration.channel = pos;
|
|
|
|
if (pwm->ops->control)
|
|
{
|
|
result = pwm->ops->control(pwm, PWM_CMD_GET, &configuration);
|
|
if (result != RT_EOK)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
configuration.pulse = *pulse;
|
|
|
|
result = pwm->ops->control(pwm, PWM_CMD_SET, &configuration);
|
|
if (result != RT_EOK)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
rt_err_t rt_device_pwm_register(struct rt_device_pwm *device, const char *name, const struct rt_pwm_ops *ops, const void *user_data)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
|
|
memset(device, 0, sizeof(struct rt_device_pwm));
|
|
|
|
device->parent.type = RT_Device_Class_Miscellaneous;
|
|
|
|
device->parent.init = RT_NULL;
|
|
device->parent.open = RT_NULL;
|
|
device->parent.close = RT_NULL;
|
|
device->parent.read = _pwm_read;
|
|
device->parent.write = _pwm_write;
|
|
device->parent.control = _pwm_control;
|
|
|
|
device->ops = ops;
|
|
device->parent.user_data = (void *)user_data;
|
|
|
|
result = rt_device_register(&device->parent, name, RT_DEVICE_FLAG_RDWR);
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_err_t rt_pwm_enable(int channel)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
struct rt_device *device = rt_device_find("pwm");
|
|
struct rt_pwm_configuration configuration={0};
|
|
|
|
if(!device)
|
|
{
|
|
return -RT_EIO;
|
|
}
|
|
|
|
configuration.channel = channel;
|
|
result = rt_device_control(device, PWM_CMD_ENABLE, &configuration);
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_err_t rt_pwm_set(int channel, rt_uint32_t period, rt_uint32_t pulse)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
struct rt_device *pwm = rt_device_find("pwm");
|
|
|
|
if(!pwm)
|
|
{
|
|
return -RT_EIO;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
#ifdef finsh
|
|
#endif /**/
|