blob: f8c02b33aac194652c1779e6b0b7acfed2624e17 (
plain)
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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-01-22 shelton first version
* 2021-11-10 breo.com porting to n32
*/
#include <board.h>
#include "drivers/dev_watchdog.h"
#ifdef RT_USING_WDT
#ifdef BSP_USING_WDT
#define LSI_VALUE 40000
//#define DRV_DEBUG
#define LOG_TAG "drv.wdt"
#include <drv_log.h>
struct n32_wdt_obj
{
IWDG_Module *instance;
rt_uint32_t Prescaler;
rt_uint32_t Reload;
rt_uint16_t is_start;
};
static struct n32_wdt_obj n32_wdt;
static struct rt_watchdog_ops ops;
static rt_watchdog_t watchdog;
static rt_err_t wdt_init(rt_watchdog_t *wdt)
{
return RT_EOK;
}
static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
switch (cmd)
{
/* feed the watchdog */
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
IWDG_ReloadKey();
break;
/* set watchdog timeout */
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
#if defined(LSI_VALUE)
if (LSI_VALUE)
{
n32_wdt.Reload = (*((rt_uint32_t *)arg)) * LSI_VALUE / 256 ;
}
else
{
LOG_E("Please define the value of LSI_VALUE!");
}
if (n32_wdt.Reload > 0xFFF)
{
LOG_E("wdg set timeout parameter too large, please less than %ds", 0xFFF * 256 / LSI_VALUE);
return -RT_EINVAL;
}
#else
#error "Please define the value of LSI_VALUE!"
#endif
if (n32_wdt.is_start)
{
IWDG_WriteConfig(IWDG_WRITE_ENABLE);
IWDG_SetPrescalerDiv(n32_wdt.Prescaler);
IWDG_CntReload(n32_wdt.Reload);
IWDG_WriteConfig(IWDG_WRITE_DISABLE);
IWDG_Enable();
}
break;
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
#if defined(LSI_VALUE)
if (LSI_VALUE)
{
(*((rt_uint32_t *)arg)) = n32_wdt.Reload * 256 / LSI_VALUE;
}
else
{
LOG_E("Please define the value of LSI_VALUE!");
}
#else
#error "Please define the value of LSI_VALUE!"
#endif
break;
case RT_DEVICE_CTRL_WDT_START:
IWDG_WriteConfig(IWDG_WRITE_ENABLE);
IWDG_SetPrescalerDiv(n32_wdt.Prescaler);
IWDG_CntReload(n32_wdt.Reload);
IWDG_WriteConfig(IWDG_WRITE_DISABLE);
IWDG_Enable();
n32_wdt.is_start = 1;
break;
default:
LOG_W("This command is not supported.");
return -RT_ERROR;
}
return RT_EOK;
}
int rt_hw_wdt_init(void)
{
n32_wdt.instance = IWDG;
n32_wdt.Prescaler = IWDG_PRESCALER_DIV256;
n32_wdt.Reload = 0x00000FFF;
n32_wdt.is_start = 0;
ops.init = &wdt_init;
ops.control = &wdt_control;
watchdog.ops = &ops;
/* register watchdog device */
if (rt_hw_watchdog_register(&watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
LOG_E("wdt device register failed.");
return -RT_ERROR;
}
LOG_D("wdt device register success.");
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_wdt_init);
#endif /* BSP_USING_WDT */
#endif /* RT_USING_WDT */
|
