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Merge pull request #1986 from ErnestChen1/master 

[add] adc framework
This commit is contained in:
Bernard Xiong 2018-11-20 18:15:33 +08:00 committed by GitHub
parent c8d38b79ff 049944529f
commit 615f011369
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 273 additions and 1 deletions
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4
components/drivers/Kconfig
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@ -72,6 +72,10 @@ config RT_USING_PIN
bool "Using generic GPIO device drivers"
default y
config RT_USING_ADC
bool "Using ADC device drivers"
default n
config RT_USING_PWM
bool "Using PWM device drivers"
default n

42
components/drivers/include/drivers/adc.h Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-05-07 aozima the first version
* 2018-11-16 Ernest Chen add finsh command and update adc function
*/
#ifndef __ADC_H__
#define __ADC_H__
#include <rtthread.h>
struct rt_adc_device;
struct rt_adc_ops
{
rt_err_t (*enabled)(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled);
rt_err_t (*convert)(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value);
};
struct rt_adc_device
{
struct rt_device parent;
const struct rt_adc_ops *ops;
};
typedef struct rt_adc_device *rt_adc_device_t;
typedef enum
{
RT_ADC_CMD_ENABLE,
RT_ADC_CMD_DISABLE,
} rt_adc_cmd_t;
rt_err_t rt_hw_adc_register(rt_adc_device_t adc,const char *name, const struct rt_adc_ops *ops, const void *user_data);
rt_uint32_t rt_adc_read(rt_adc_device_t dev, rt_uint32_t channel);
rt_err_t rt_adc_enable(rt_adc_device_t dev, rt_uint32_t channel);
rt_err_t rt_adc_disable(rt_adc_device_t dev, rt_uint32_t channel);
#endif /* __ADC_H__ */

4
components/drivers/include/rtdevice.h
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@ -99,6 +99,10 @@ extern "C" {
#include "drivers/cputime.h"
#endif
#ifdef RT_USING_ADC
#include "drivers/adc.h"
#endif
#ifdef RT_USING_PWM
#include "drivers/rt_drv_pwm.h"
#endif

3
components/drivers/misc/SConscript
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@ -8,6 +8,9 @@ group = []
if GetDepend(['RT_USING_PIN']):
src = src + ['pin.c']
if GetDepend(['RT_USING_ADC']):
src = src + ['adc.c']
if GetDepend(['RT_USING_PWM']):
src = src + ['rt_drv_pwm.c']

219
components/drivers/misc/adc.c Normal file
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@ -0,0 +1,219 @@
/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-05-07 aozima the first version
* 2018-11-16 Ernest Chen add finsh command and update adc function
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <string.h>
#include <stdlib.h>
#define DBG_ENABLE
#define DBG_SECTION_NAME "adc"
#define DBG_LEVEL DBG_INFO
#define DBG_COLOR
#include <rtdbg.h>
static rt_size_t _adc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
rt_err_t result = RT_EOK;
rt_size_t i;
struct rt_adc_device *adc = (struct rt_adc_device *)dev;
rt_uint32_t *value = (rt_uint32_t *)buffer;
for (i = 0; i < size; i += sizeof(int))
{
result = adc->ops->convert(adc, pos + i, value);
if (result != RT_EOK)
{
return 0;
}
value++;
}
return i;
}
static rt_err_t _adc_control(rt_device_t dev, int cmd, void *args)
{
rt_err_t result = RT_EOK;
rt_adc_device_t adc = (struct rt_adc_device *)dev;
if (adc->ops->enabled != RT_NULL)
{
return -RT_ENOSYS;
}
if (cmd == RT_ADC_CMD_ENABLE)
{
result = adc->ops->enabled(adc, (rt_uint32_t)args, RT_TRUE);
}
else if (cmd == RT_ADC_CMD_DISABLE)
{
result = adc->ops->enabled(adc, (rt_uint32_t)args, RT_FALSE);
}
return result;
}
rt_err_t rt_hw_adc_register(rt_adc_device_t device, const char *name, const struct rt_adc_ops *ops, const void *user_data)
{
rt_err_t result = RT_EOK;
RT_ASSERT(ops != RT_NULL && ops->convert != RT_NULL);
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 = _adc_read;
device->parent.write = RT_NULL;
device->parent.control = _adc_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_uint32_t rt_adc_read(rt_adc_device_t dev, rt_uint32_t channel)
{
rt_uint32_t value;
RT_ASSERT(dev);
dev->ops->convert(dev, channel, &value);
return value;
}
rt_err_t rt_adc_enable(rt_adc_device_t dev, rt_uint32_t channel)
{
rt_err_t result = RT_EOK;
RT_ASSERT(dev);
if (dev->ops->enabled != RT_NULL)
{
result = dev->ops->enabled(dev, channel, RT_TRUE);
}
else
{
result = -RT_ENOSYS;
}
return result;
}
rt_err_t rt_adc_disable(rt_adc_device_t dev, rt_uint32_t channel)
{
rt_err_t result = RT_EOK;
RT_ASSERT(dev);
if (dev->ops->enabled != RT_NULL)
{
result = dev->ops->enabled(dev, channel, RT_FALSE);
}
else
{
result = -RT_ENOSYS;
}
return result;
}
#ifdef FINSH_USING_MSH
static int adc(int argc, char **argv)
{
int value = 0;
int result = RT_EOK;
static rt_adc_device_t adc_device = RT_NULL;
char *result_str;
if (argc > 1)
{
if (!strcmp(argv[1], "probe"))
{
if (argc == 3)
{
adc_device = (rt_adc_device_t)rt_device_find(argv[2]);
result_str = (adc_device == RT_NULL) ? "failure" : "success";
rt_kprintf("probe %s %s \n", argv[2], result_str);
}
else
{
rt_kprintf("adc probe <adc_name> - probe adc by name\n");
}
}
else
{
if (adc_device == RT_NULL)
{
rt_kprintf("Please using 'adc probe <adc_name>' first\n");
return -RT_ERROR;
}
if (!strcmp(argv[1], "enable"))
{
if (argc == 3)
{
result = rt_adc_enable(adc_device, atoi(argv[2]));
result_str = (result == RT_EOK) ? "success" : "failure";
rt_kprintf("%s channel %d enables %s \n", adc_device->parent.parent.name, atoi(argv[2]), result_str);
}
else
{
rt_kprintf("adc enable <channel> - enable adc channel\n");
}
}
else if (!strcmp(argv[1], "read"))
{
if (argc == 3)
{
value = rt_adc_read(adc_device, atoi(argv[2]));
rt_kprintf("%s channel %d read value is 0x%08X \n", adc_device->parent.parent.name, atoi(argv[2]), value);
}
else
{
rt_kprintf("adc read <channel> - read adc value on the channel\n");
}
}
else if (!strcmp(argv[1], "disable"))
{
if (argc == 3)
{
result = rt_adc_disable(adc_device, atoi(argv[2]));
result_str = (result == RT_EOK) ? "success" : "failure";
rt_kprintf("%s channel %d disable %s \n", adc_device->parent.parent.name, atoi(argv[2]), result_str);
}
else
{
rt_kprintf("adc disable <channel> - disable adc channel\n");
}
}
else
{
rt_kprintf("Unknown command. Please enter 'adc' for help\n");
}
}
}
else
{
rt_kprintf("Usage: \n");
rt_kprintf("adc probe <adc_name> - probe adc by name\n");
rt_kprintf("adc read <channel> - read adc value on the channel\n");
rt_kprintf("adc disable <channel> - disable adc channel\n");
rt_kprintf("adc enable <channel> - enable adc channel\n");
result = -RT_ERROR;
}
return RT_EOK;
}
MSH_CMD_EXPORT(adc, adc function);
#endif /* FINSH_USING_MSH */