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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>
#if defined(BSP_USING_DAC)
#include <rtdevice.h>
#include "NuMicro.h"
/* Private define ---------------------------------------------------------------*/
enum
{
DAC_START = -1,
#if defined(BSP_USING_DAC0)
DAC0_IDX,
#endif
#if defined(BSP_USING_DAC1)
DAC1_IDX,
#endif
DAC_CNT
};
/* Private Typedef --------------------------------------------------------------*/
struct nu_dac
{
struct rt_dac_device dev;
char *name;
DAC_T *base;
uint32_t chn_msk;
uint32_t max_chn_num;
};
typedef struct nu_dac *nu_dac_t;
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel);
static rt_err_t nu_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel);
static rt_err_t nu_dac_convert(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value);
/* Public functions ------------------------------------------------------------*/
int rt_hw_dac_init(void);
/* Private variables ------------------------------------------------------------*/
static struct nu_dac nu_dac_arr [] =
{
#if defined(BSP_USING_DAC0)
{
.name = "dac0", .base = DAC0, .chn_msk = 0, .max_chn_num = 1,
},
#endif
#if defined(BSP_USING_DAC1)
{
.name = "dac1", .base = DAC1, .chn_msk = 0, .max_chn_num = 1,
},
#endif
};
/* nu_dac_enabled - Enable DAC engine and wait for ready */
static rt_err_t nu_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel)
{
nu_dac_t psNuDAC = (nu_dac_t)device;
RT_ASSERT(device);
if (channel >= psNuDAC->max_chn_num)
return -(RT_EINVAL);
if (!(psNuDAC->chn_msk & (0x1 << channel)))
{
DAC_Open(psNuDAC->base, channel, DAC_SOFTWARE_TRIGGER);
/* The DAC conversion settling time is 1us */
DAC_SetDelayTime(psNuDAC->base, 1);
DAC_ENABLE_RIGHT_ALIGN(psNuDAC->base);
psNuDAC->chn_msk |= (0x1 << channel);
}
return RT_EOK;
}
static rt_err_t nu_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel)
{
nu_dac_t psNuDAC = (nu_dac_t)device;
RT_ASSERT(device);
if (channel >= psNuDAC->max_chn_num)
return -(RT_EINVAL);
if (psNuDAC->chn_msk & (0x1 << channel))
{
DAC_Close(psNuDAC->base, channel);
psNuDAC->chn_msk &= ~(0x1 << channel);
}
return RT_EOK;
}
static rt_err_t nu_dac_convert(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
nu_dac_t psNuDAC = (nu_dac_t)device;
rt_err_t ret = -RT_ERROR;
RT_ASSERT(device);
RT_ASSERT(value);
if (channel >= psNuDAC->max_chn_num)
{
ret = -RT_EINVAL;
goto exit_nu_dac_convert;
}
if (!(psNuDAC->chn_msk & (1 << channel)))
{
goto exit_nu_dac_convert;
}
/* Set DAC 12-bit holding data */
DAC_WRITE_DATA(psNuDAC->base, 0, (uint16_t)*value);
/* Start A/D conversion */
DAC_START_CONV(psNuDAC->base);
ret = RT_EOK;
exit_nu_dac_convert:
return -(ret);
}
static const struct rt_dac_ops nu_dac_ops =
{
.disabled = nu_dac_disabled,
.enabled = nu_dac_enabled,
.convert = nu_dac_convert,
};
int rt_hw_dac_init(void)
{
int i;
rt_err_t result;
for (i = (DAC_START + 1); i < DAC_CNT; i++)
{
result = rt_hw_dac_register(&nu_dac_arr[i].dev, nu_dac_arr[i].name, &nu_dac_ops, NULL);
RT_ASSERT(result == RT_EOK);
}
return 0;
}
INIT_BOARD_EXPORT(rt_hw_dac_init);
#endif //#if defined(BSP_USING_DAC)
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