281 lines
7.4 KiB
C
281 lines
7.4 KiB
C
/*
|
|
* Copyright (c) 2006-2022, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2022-02-22 airm2m first version
|
|
*/
|
|
|
|
#include <board.h>
|
|
#include <rtthread.h>
|
|
#include <rtdevice.h>
|
|
#include "drv_adc.h"
|
|
|
|
#if defined(BSP_USING_ADC1) || defined(BSP_USING_ADC2)
|
|
|
|
//#define DRV_DEBUG
|
|
#define LOG_TAG "drv.adc"
|
|
#include <drv_log.h>
|
|
|
|
static ADC_HandleTypeDef adc_config[] =
|
|
{
|
|
#ifdef BSP_USING_ADC1
|
|
{ \
|
|
.Instance = ADC1, \
|
|
.Init.ADC_Mode = ADC_Mode_Independent, \
|
|
.Init.ADC_ScanConvMode = DISABLE, \
|
|
.Init.ADC_ContinuousConvMode = DISABLE, \
|
|
.Init.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None, \
|
|
.Init.ADC_DataAlign = ADC_DataAlign_Right, \
|
|
.Init.ADC_NbrOfChannel = 1, \
|
|
},
|
|
#endif
|
|
|
|
#ifdef BSP_USING_ADC2
|
|
{ \
|
|
.Instance = ADC2, \
|
|
.Init.ADC_Mode = ADC_Mode_Independent, \
|
|
.Init.ADC_ScanConvMode = DISABLE, \
|
|
.Init.ADC_ContinuousConvMode = DISABLE, \
|
|
.Init.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None, \
|
|
.Init.ADC_DataAlign = ADC_DataAlign_Right, \
|
|
.Init.ADC_NbrOfChannel = 1, \
|
|
}
|
|
#endif
|
|
};
|
|
|
|
struct air32_adc
|
|
{
|
|
ADC_HandleTypeDef ADC_Handler;
|
|
struct rt_adc_device air32_adc_device;
|
|
};
|
|
|
|
static struct air32_adc air32_adc_obj[sizeof(adc_config) / sizeof(adc_config[0])];
|
|
|
|
static rt_uint8_t air32_adc_get_resolution(struct rt_adc_device *device)
|
|
{
|
|
//the resolution which can not be changed is just 12bit;
|
|
return 12;
|
|
}
|
|
|
|
static rt_int16_t air32_adc_get_vref (struct rt_adc_device *device)
|
|
{
|
|
RT_ASSERT(device);
|
|
return 3300;
|
|
}
|
|
|
|
static rt_err_t air32_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
|
|
{
|
|
ADC_HandleTypeDef *air32_adc_handler;
|
|
RT_ASSERT(device != RT_NULL);
|
|
air32_adc_handler = device->parent.user_data;
|
|
|
|
if (enabled)
|
|
{
|
|
ADC_Cmd(air32_adc_handler->Instance, ENABLE);
|
|
}
|
|
else
|
|
{
|
|
ADC_Cmd(air32_adc_handler->Instance, DISABLE);
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_uint32_t air32_adc_get_channel(rt_uint32_t channel)
|
|
{
|
|
rt_uint32_t air32_channel = 0;
|
|
|
|
switch (channel)
|
|
{
|
|
case 0:
|
|
air32_channel = ADC_Channel_0;
|
|
break;
|
|
case 1:
|
|
air32_channel = ADC_Channel_1;
|
|
break;
|
|
case 2:
|
|
air32_channel = ADC_Channel_2;
|
|
break;
|
|
case 3:
|
|
air32_channel = ADC_Channel_3;
|
|
break;
|
|
case 4:
|
|
air32_channel = ADC_Channel_4;
|
|
break;
|
|
case 5:
|
|
air32_channel = ADC_Channel_5;
|
|
break;
|
|
case 6:
|
|
air32_channel = ADC_Channel_6;
|
|
break;
|
|
case 7:
|
|
air32_channel = ADC_Channel_7;
|
|
break;
|
|
case 8:
|
|
air32_channel = ADC_Channel_8;
|
|
break;
|
|
case 9:
|
|
air32_channel = ADC_Channel_9;
|
|
break;
|
|
case 10:
|
|
air32_channel = ADC_Channel_10;
|
|
break;
|
|
case 11:
|
|
air32_channel = ADC_Channel_11;
|
|
break;
|
|
case 12:
|
|
air32_channel = ADC_Channel_12;
|
|
break;
|
|
case 13:
|
|
air32_channel = ADC_Channel_13;
|
|
break;
|
|
case 14:
|
|
air32_channel = ADC_Channel_14;
|
|
break;
|
|
case 15:
|
|
air32_channel = ADC_Channel_15;
|
|
break;
|
|
#ifdef ADC_CHANNEL_16
|
|
case 16:
|
|
air32_channel = ADC_Channel_16;
|
|
break;
|
|
#endif /* ADC_CHANNEL_16 */
|
|
#ifdef ADC_CHANNEL_17
|
|
case 17:
|
|
air32_channel = ADC_Channel_17;
|
|
break;
|
|
#endif /* ADC_CHANNEL_17 */
|
|
#ifdef ADC_CHANNEL_18
|
|
case 18:
|
|
air32_channel = ADC_Channel_18;
|
|
break;
|
|
#endif /* ADC_CHANNEL_18 */
|
|
#ifdef ADC_CHANNEL_19
|
|
case 19:
|
|
air32_channel = ADC_Channel_19;
|
|
break;
|
|
#endif /* ADC_CHANNEL_19 */
|
|
}
|
|
|
|
return air32_channel;
|
|
}
|
|
|
|
static rt_err_t air32_get_adc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
|
|
{
|
|
ADC_ChannelConfTypeDef ADC_ChanConf;
|
|
ADC_HandleTypeDef *air32_adc_handler;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(value != RT_NULL);
|
|
|
|
air32_adc_handler = device->parent.user_data;
|
|
|
|
rt_memset(&ADC_ChanConf, 0, sizeof(ADC_ChanConf));
|
|
|
|
#ifndef ADC_CHANNEL_16
|
|
if (channel == 16)
|
|
{
|
|
LOG_E("ADC channel must not be 16.");
|
|
return -RT_ERROR;
|
|
}
|
|
#endif
|
|
|
|
/* ADC channel number is up to 17 */
|
|
#if !defined(ADC_CHANNEL_18)
|
|
if (channel <= 17)
|
|
/* ADC channel number is up to 19 */
|
|
#elif defined(ADC_CHANNEL_19)
|
|
if (channel <= 19)
|
|
/* ADC channel number is up to 18 */
|
|
#else
|
|
if (channel <= 18)
|
|
#endif
|
|
{
|
|
/* set air32 ADC channel */
|
|
ADC_ChanConf.Channel = air32_adc_get_channel(channel);
|
|
}
|
|
else
|
|
{
|
|
#if !defined(ADC_CHANNEL_18)
|
|
LOG_E("ADC channel must be between 0 and 17.");
|
|
#elif defined(ADC_CHANNEL_19)
|
|
LOG_E("ADC channel must be between 0 and 19.");
|
|
#else
|
|
LOG_E("ADC channel must be between 0 and 18.");
|
|
#endif
|
|
return -RT_ERROR;
|
|
}
|
|
|
|
ADC_ChanConf.Rank = 1;
|
|
ADC_ChanConf.SamplingTime = ADC_SampleTime_239Cycles5;
|
|
ADC_RegularChannelConfig(air32_adc_handler->Instance,ADC_ChanConf.Channel , ADC_ChanConf.Rank, ADC_ChanConf.SamplingTime );
|
|
|
|
/* start ADC */
|
|
ADC_SoftwareStartConvCmd(air32_adc_handler->Instance, ENABLE);
|
|
/* Wait for the ADC to convert */
|
|
while(!ADC_GetFlagStatus(air32_adc_handler->Instance, ADC_FLAG_EOC ));
|
|
/* get ADC value */
|
|
*value = (rt_uint32_t)ADC_GetConversionValue(air32_adc_handler->Instance);
|
|
ADC_ClearFlag( air32_adc_handler->Instance, ADC_FLAG_EOC);
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
static const struct rt_adc_ops air32_adc_ops =
|
|
{
|
|
.enabled = air32_adc_enabled,
|
|
.convert = air32_get_adc_value,
|
|
.get_resolution = air32_adc_get_resolution,
|
|
.get_vref = air32_adc_get_vref
|
|
};
|
|
|
|
static int air32_adc_init(void)
|
|
{
|
|
int result = RT_EOK;
|
|
/* save adc name */
|
|
char name_buf[5] = {'a', 'd', 'c', '0', 0};
|
|
int i = 0;
|
|
|
|
for (i = 0; i < sizeof(adc_config) / sizeof(adc_config[0]); i++)
|
|
{
|
|
/* ADC init */
|
|
name_buf[3] = '0';
|
|
air32_adc_obj[i].ADC_Handler = adc_config[i];
|
|
#if defined(ADC1)
|
|
if (air32_adc_obj[i].ADC_Handler.Instance == ADC1)
|
|
{
|
|
name_buf[3] = '1';
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
|
|
}
|
|
#endif
|
|
#if defined(ADC2)
|
|
if (air32_adc_obj[i].ADC_Handler.Instance == ADC2)
|
|
{
|
|
name_buf[3] = '2';
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE );
|
|
}
|
|
#endif
|
|
{
|
|
ADC_Init(air32_adc_obj[i].ADC_Handler.Instance,&air32_adc_obj[i].ADC_Handler.Init );
|
|
/* register ADC device */
|
|
if (rt_hw_adc_register(&air32_adc_obj[i].air32_adc_device, name_buf, &air32_adc_ops, &air32_adc_obj[i].ADC_Handler) == RT_EOK)
|
|
{
|
|
LOG_D("%s init success", name_buf);
|
|
}
|
|
else
|
|
{
|
|
LOG_E("%s register failed", name_buf);
|
|
result = -RT_ERROR;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
INIT_DEVICE_EXPORT(air32_adc_init);
|
|
|
|
#endif /* BSP_USING_ADC */
|