1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*
* Copyright (c) 2006-2022, Synwit Technology Co.,Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-02-10 lik first version
*/
#include "drv_dac.h"
#ifdef BSP_USING_DAC
//#define DRV_DEBUG
#define LOG_TAG "drv.dac"
#include <drv_log.h>
static struct rt_dac_device swm_dac_device;
static rt_err_t swm_dac_enabled(struct rt_dac_device *device, rt_uint32_t channel)
{
RT_ASSERT(device != RT_NULL);
if (channel != 0)
{
LOG_E("dac channel must be 0.");
return -RT_ERROR;
}
DAC_Open(DAC);
return RT_EOK;
}
static rt_err_t swm_dac_disabled(struct rt_dac_device *device, rt_uint32_t channel)
{
RT_ASSERT(device != RT_NULL);
if (channel != 0)
{
LOG_E("dac channel must be 0.");
return -RT_ERROR;
}
DAC_Close(DAC);
return RT_EOK;
}
static rt_err_t swm_dac_convert(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(value != RT_NULL);
if (channel != 0)
{
LOG_E("dac channel must be 0.");
return -RT_ERROR;
}
DAC->DHR = *value;
while(DAC->SR & DAC_SR_DHRFULL_Msk) __NOP();
return RT_EOK;
}
static const struct rt_dac_ops swm_dac_ops =
{
.disabled = swm_dac_disabled,
.enabled = swm_dac_enabled,
.convert = swm_dac_convert,
};
int swm_dac_init(void)
{
int result = RT_EOK;
PORT_Init(PORTD, PIN2, PORTD_PIN2_DAC_OUT, 0);
DAC_Init(DAC, DAC_FORMAT_LSB12B);
SYS->DACCR &= ~SYS_DACCR_VRADJ_Msk;
SYS->DACCR |= (17 << SYS_DACCR_VRADJ_Pos);
/* register dac device */
result = rt_hw_dac_register(&swm_dac_device, "dac", &swm_dac_ops, RT_NULL);
if(result != RT_EOK)
{
LOG_E("dac register fail.");
}
else
{
LOG_D("dac register success.");
}
return result;
}
INIT_DEVICE_EXPORT(swm_dac_init);
#endif /* BSP_USING_DAC */
|
