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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-11-23 Chushicheng first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "drv_adc.h"
#include "esp_adc/adc_oneshot.h"
#include "esp_adc/adc_cali.h"
#include "esp_adc/adc_cali_scheme.h"
#include "hal/adc_types.h"
#ifdef BSP_USING_ADC
#define DBG_TAG "drv.adc"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#define EXAMPLE_READ_LEN 256
#define GET_UNIT(x) ((x>>3) & 0x1)
/* esp i2c dirver class */
struct esp_adc
{
struct rt_adc_ops ops;
struct rt_adc_device adc_device;
rt_uint8_t adc_id;
adc_oneshot_unit_handle_t handle;
adc_cali_handle_t cali_handle;
rt_uint8_t do_calibration1;
};
static struct esp_adc_config adc_config[] =
{
#ifdef BSP_USING_ADC1
{
.adc_id = ADC_UNIT_1,
.device_name = "adc1",
},
#endif
};
static struct esp_adc esp_adc_obj[sizeof(adc_config) / sizeof(adc_config[0])];
static rt_err_t _adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled)
{
struct esp_adc *_adc = rt_container_of(device, struct esp_adc, adc_device);
if(enabled)
{
//-------------ADC Init---------------//
adc_oneshot_unit_init_cfg_t init_config = {
.unit_id = _adc->adc_id,
};
ESP_ERROR_CHECK(adc_oneshot_new_unit(&init_config, &_adc->handle));
//-------------ADC Config---------------//
adc_oneshot_chan_cfg_t config = {
.bitwidth = ADC_BITWIDTH_DEFAULT,
.atten = ADC_ATTEN_DB_11,
};
ESP_ERROR_CHECK(adc_oneshot_config_channel(_adc->handle, channel, &config));
//-------------ADC Calibration Init---------------//
adc_cali_curve_fitting_config_t cali_config = {
.unit_id = _adc->adc_id,
.atten = ADC_ATTEN_DB_11,
.bitwidth = ADC_BITWIDTH_DEFAULT,
};
if (adc_cali_create_scheme_curve_fitting(&cali_config, &_adc->cali_handle) == ESP_OK)
{
_adc->do_calibration1 = 1;
}
else
{
_adc->do_calibration1 = 0;
}
// _adc->do_calibration1 = example_adc_calibration_init(_adc->adc_id, ADC_ATTEN_DB_11, &_adc->cali_handle);
}
else
{
ESP_ERROR_CHECK(adc_oneshot_del_unit(_adc->handle));
ESP_ERROR_CHECK(adc_cali_delete_scheme_curve_fitting(_adc->cali_handle));
}
return RT_EOK;
}
static rt_err_t _adc_get_value(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(value != RT_NULL);
rt_uint32_t adc_raw = 0;
struct esp_adc *_adc = rt_container_of(device, struct esp_adc, adc_device);
ESP_ERROR_CHECK(adc_oneshot_read(_adc->handle, channel, &adc_raw));
if (_adc->do_calibration1)
{
ESP_ERROR_CHECK(adc_cali_raw_to_voltage(_adc->cali_handle, adc_raw, value));
}
else
{
*value = adc_raw;
}
return RT_EOK;
}
static const struct rt_adc_ops esp_adc_ops =
{
.enabled = _adc_enabled,
.convert = _adc_get_value,
.get_resolution = RT_NULL,
.get_vref = RT_NULL,
};
int rt_hw_adc_init(void)
{
int result = RT_EOK;
for (rt_size_t i = 0; i < sizeof(esp_adc_obj) / sizeof(struct esp_adc); i++)
{
esp_adc_obj[i].adc_id = adc_config[i].adc_id;
/* register ADC device */
if (rt_hw_adc_register(&esp_adc_obj[i].adc_device, adc_config[i].device_name, &esp_adc_ops, &adc_config[i]) == RT_EOK)
{
LOG_D("%s init success", adc_config[i].device_name);
}
else
{
LOG_E("%s register failed", adc_config[i].device_name);
result = -RT_ERROR;
}
}
return result;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
#endif /* BSP_USING_ADC */
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