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/**************************************************************************//**
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-3-16 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#include <rtdevice.h>
#include "NuMicro.h"
#if defined(BSP_USING_EADC)
/* Private define ---------------------------------------------------------------*/
enum
{
EADC_START = -1,
#if defined(BSP_USING_EADC0)
EADC0_IDX,
#endif
#if defined(BSP_USING_EADC1)
EADC1_IDX,
#endif
#if defined(BSP_USING_EADC2)
EADC2_IDX,
#endif
EADC_CNT
};
/* Private Typedef --------------------------------------------------------------*/
struct nu_eadc
{
struct rt_adc_device dev;
char *name;
EADC_T *base;
uint32_t chn_msk;
uint32_t max_chn_num;
};
typedef struct nu_eadc *nu_eadc_t;
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_eadc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled);
static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value);
static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value);
/* Public functions ------------------------------------------------------------*/
int rt_hw_eadc_init(void);
/* Private variables ------------------------------------------------------------*/
static struct nu_eadc nu_eadc_arr [] =
{
#if defined(BSP_USING_EADC0)
{
.name = "eadc0",
.base = EADC0,
.chn_msk = 0,
.max_chn_num = 16,
},
#endif
#if defined(BSP_USING_EADC1)
{
.name = "eadc1",
.base = EADC1,
.chn_msk = 0,
.max_chn_num = 16,
},
#endif
#if defined(BSP_USING_EADC2)
{
.name = "eadc2",
.base = EADC2,
.chn_msk = 0,
.max_chn_num = 16,
},
#endif
};
static const struct rt_adc_ops nu_adc_ops =
{
nu_eadc_enabled,
nu_get_eadc_value,
};
typedef struct rt_adc_ops *rt_adc_ops_t;
/* nu_adc_enabled - Enable ADC clock and wait for ready */
static rt_err_t nu_eadc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
{
nu_eadc_t psNuEADC = (nu_eadc_t)device;
RT_ASSERT(device);
if (channel >= psNuEADC->max_chn_num)
return -(RT_EINVAL);
if (enabled)
{
if (psNuEADC->chn_msk == 0)
{
EADC_Open(psNuEADC->base, EADC_CTL_DIFFEN_SINGLE_END);
}
psNuEADC->chn_msk |= (0x1 << channel);
}
else
{
psNuEADC->chn_msk &= ~(0x1 << channel);
if (psNuEADC->chn_msk == 0)
{
EADC_Close(psNuEADC->base);
}
}
return RT_EOK;
}
static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
nu_eadc_t psNuEADC = (nu_eadc_t)device;
rt_err_t ret = -RT_ERROR;
RT_ASSERT(device);
RT_ASSERT(value);
if (channel >= psNuEADC->max_chn_num)
{
*value = 0xFFFFFFFF;
ret = -RT_EINVAL;
goto exit_nu_get_eadc_value;
}
if ((psNuEADC->chn_msk & (1 << channel)) == 0)
{
*value = 0xFFFFFFFF;
ret = -RT_EBUSY;
goto exit_nu_get_eadc_value;
}
EADC_ConfigSampleModule(psNuEADC->base, 0, EADC_SOFTWARE_TRIGGER, channel);
EADC_CLR_INT_FLAG(psNuEADC->base, EADC_STATUS2_ADIF0_Msk);
EADC_ENABLE_INT(psNuEADC->base, BIT0);
EADC_ENABLE_SAMPLE_MODULE_INT(psNuEADC->base, 0, BIT0);
EADC_START_CONV(psNuEADC->base, BIT0);
while (EADC_GET_INT_FLAG(psNuEADC->base, BIT0) == 0);
EADC_DISABLE_INT(psNuEADC->base, BIT0);
*value = EADC_GET_CONV_DATA(psNuEADC->base, 0);
ret = RT_EOK;
exit_nu_get_eadc_value:
return -(ret);
}
int rt_hw_eadc_init(void)
{
int i;
rt_err_t result;
for (i = (EADC_START + 1); i < EADC_CNT; i++)
{
result = rt_hw_adc_register(&nu_eadc_arr[i].dev, nu_eadc_arr[i].name, &nu_adc_ops, NULL);
RT_ASSERT(result == RT_EOK);
}
return 0;
}
INIT_BOARD_EXPORT(rt_hw_eadc_init);
#endif //#if defined(BSP_USING_EADC)
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