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/**************************************************************************//**
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-9-23 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_EADC)
#include <rtdevice.h>
#include "NuMicro.h"
/* Private define --------------------------------------------------------------- */
#define DEF_EADC_MAX_CHANNEL_NUM 8
enum
{
EADC_START = -1,
#if defined(BSP_USING_EADC0)
EADC0_IDX,
#endif
EADC_CNT
};
/* Private Typedef -------------------------------------------------------------- */
struct nu_eadc
{
struct rt_adc_device parent;
char *name;
EADC_T *base;
uint32_t rstidx;
uint32_t modid;
uint32_t chnmask;
};
typedef struct nu_eadc *nu_eadc_t;
/* Private functions ------------------------------------------------------------ */
static rt_err_t nu_eadc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled);
static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_int8_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, .rstidx = EADC0_RST, .modid = EADC0_MODULE, .chnmask = 0 },
#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_int8_t channel, rt_bool_t enabled)
{
nu_eadc_t psNuEadc = (nu_eadc_t)device;
RT_ASSERT(device != RT_NULL);
if (channel >= DEF_EADC_MAX_CHANNEL_NUM)
return -(RT_EINVAL);
if (enabled)
{
if (psNuEadc->chnmask == 0)
{
/* Invoke Open function at first call. */
EADC_Open(psNuEadc->base, EADC_CTL_DIFFEN_SINGLE_END);
}
psNuEadc->chnmask |= (1 << channel);
}
else
{
psNuEadc->chnmask &= ~(1 << channel);
if (psNuEadc->chnmask == 0)
{
/* Invoke Open function at last call. */
EADC_Close(psNuEadc->base);
}
}
return RT_EOK;
}
static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
{
nu_eadc_t psNuEadc = (nu_eadc_t)device;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(value != RT_NULL);
if (channel >= DEF_EADC_MAX_CHANNEL_NUM)
{
*value = 0xFFFFFFFF;
return -(RT_EINVAL);
}
if ((psNuEadc->chnmask & (1 << channel)) == 0)
{
*value = 0xFFFFFFFF;
return -(RT_EBUSY);
}
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);
*value = EADC_GET_CONV_DATA(psNuEadc->base, 0);
return RT_EOK;
}
int rt_hw_eadc_init(void)
{
int i;
rt_err_t ret = RT_EOK;
for (i = (EADC_START + 1); i < EADC_CNT; i++)
{
CLK_EnableModuleClock(nu_eadc_arr[i].modid);
SYS_ResetModule(nu_eadc_arr[i].rstidx);
ret = rt_hw_adc_register(&nu_eadc_arr[i].parent, nu_eadc_arr[i].name, &nu_adc_ops, &nu_eadc_arr[i]);
RT_ASSERT(ret == RT_EOK);
}
return (int)ret;
}
INIT_BOARD_EXPORT(rt_hw_eadc_init);
#endif /* #if defined(BSP_USING_EADC) */
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