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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
|
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-25 AisinoChip First Version
*/
#include <board.h>
#include <rtthread.h>
#include <rtdevice.h>
#ifdef RT_USING_WDT
#include "board.h"
struct acm32_wdt_obj
{
union
{
WDT_HandleTypeDef wdt;
IWDT_HandleTypeDef iwdt;
} handle;
rt_uint16_t is_start;
rt_uint16_t type;
rt_watchdog_t watchdog;
};
#define TYPE_WDT 0
#define TYPE_IWDT 1
#define IWDT_FREQ (32000)
#ifdef BSP_USING_WDT
#define WDT_NAME "wdt"
static struct acm32_wdt_obj acm32_wdt;
#endif
#ifdef BSP_USING_IWDT
#define IWDT_NAME "iwdt"
static struct acm32_wdt_obj acm32_iwdt;
#endif
static struct rt_watchdog_ops ops;
rt_inline rt_base_t calc_wdt_divisor_load(rt_uint32_t freq, rt_uint32_t sec, rt_uint32_t *divisor, rt_uint32_t *load)
{
rt_uint32_t freqMaxSec = 0;
rt_uint32_t minFreqDiv = WDT_DIVISOR_NONE;
freqMaxSec = RT_UINT32_MAX / freq;
while (minFreqDiv <= WDT_DIVISOR_128)
{
if (sec < freqMaxSec)
{
break;
}
minFreqDiv ++;
freqMaxSec = RT_UINT32_MAX / freq * (1 << minFreqDiv);
}
if (minFreqDiv > WDT_DIVISOR_128)
{
return -1;
}
*divisor = minFreqDiv;
*load = sec * (freq >> minFreqDiv);
return 0;
}
rt_inline rt_base_t calc_iwdt_divisor_load(rt_uint32_t freq, rt_uint32_t sec, rt_uint32_t *divisor, rt_uint32_t *load)
{
rt_uint32_t minFreqDiv = IWDT_CLOCK_PRESCALER_4;
rt_uint32_t freqMaxMs = 0;
freqMaxMs = IWDT_RELOAD_MAX_VALUE * 1000 / (freq >> (2 + minFreqDiv));
while (minFreqDiv <= IWDT_CLOCK_PRESCALER_256)
{
if (sec * 1000 < freqMaxMs)
{
break;
}
minFreqDiv ++;
freqMaxMs = IWDT_RELOAD_MAX_VALUE * 1000 / (freq >> (2 + minFreqDiv));
}
if (minFreqDiv > IWDT_CLOCK_PRESCALER_256)
{
return -1;
}
*divisor = minFreqDiv;
if (sec < 1000)
{
*load = (sec * 1000) * IWDT_RELOAD_MAX_VALUE / freqMaxMs;
}
else
{
*load = (sec) * IWDT_RELOAD_MAX_VALUE / freqMaxMs / 1000;
}
return 0;
}
rt_inline rt_uint32_t calc_wdt_timeout(rt_uint32_t freq, rt_uint32_t divisor, rt_uint32_t count)
{
/* 1 / ( freq / (1<<divisor) ) * (count) */
return (rt_uint32_t)(((rt_uint64_t)count) * (1 << divisor) / (freq));
}
rt_inline rt_uint32_t calc_iwdt_timeout(rt_uint32_t freq, rt_uint32_t divisor, rt_uint32_t count)
{
/* (freq >> (2+divisor)) / IWDT_RELOAD_MAX_VALUE * count */
return count / (freq >> (2 + divisor));
}
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)
{
struct acm32_wdt_obj *wdtObj = NULL;
rt_uint32_t timer_clk_hz;
rt_uint32_t divisor, load;
RT_ASSERT(wdt != RT_NULL);
wdtObj = rt_container_of(wdt, struct acm32_wdt_obj, watchdog);
timer_clk_hz = System_Get_APBClock();
switch (cmd)
{
/* feed the watchdog */
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
if (TYPE_WDT == wdtObj->type)
{
HAL_WDT_Feed(&wdtObj->handle.wdt);
}
else
{
HAL_IWDT_Kick_Watchdog_Wait_For_Done(&wdtObj->handle.iwdt);
}
break;
/* set watchdog timeout, seconds */
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
if (TYPE_WDT == wdtObj->type)
{
if (calc_wdt_divisor_load(timer_clk_hz, (*((rt_uint32_t *)arg)), &divisor, &load))
{
return -RT_ERROR;
}
wdtObj->handle.wdt.Init.WDTDivisor = (WDT_DIVISOR)divisor;
wdtObj->handle.wdt.Init.WDTLoad = load;
HAL_WDT_Init(&wdtObj->handle.wdt);
}
else
{
if (calc_iwdt_divisor_load(IWDT_FREQ, (*((rt_uint32_t *)arg)), &divisor, &load))
{
return -RT_ERROR;
}
wdtObj->handle.iwdt.Instance = IWDT;
wdtObj->handle.iwdt.Init.Prescaler = divisor;
wdtObj->handle.iwdt.Init.Reload = load;
}
if (wdtObj->is_start)
{
if (TYPE_WDT == wdtObj->type)
{
HAL_WDT_Init(&wdtObj->handle.wdt);
}
else
{
HAL_IWDT_Init(&wdtObj->handle.iwdt);
}
}
break;
case RT_DEVICE_CTRL_WDT_GET_TIMELEFT:
if (TYPE_WDT == wdtObj->type)
{
(*((rt_uint32_t *)arg)) = calc_wdt_timeout(timer_clk_hz,
wdtObj->handle.wdt.Init.WDTDivisor,
wdtObj->handle.wdt.Instance->COUNT);
}
else
{
return -RT_EINVAL;
}
break;
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
if (TYPE_WDT == wdtObj->type)
{
(*((rt_uint32_t *)arg)) = calc_wdt_timeout(timer_clk_hz,
wdtObj->handle.wdt.Init.WDTDivisor,
wdtObj->handle.wdt.Init.WDTLoad);
}
else
{
(*((rt_uint32_t *)arg)) = calc_iwdt_timeout(IWDT_FREQ,
wdtObj->handle.iwdt.Init.Prescaler,
wdtObj->handle.iwdt.Init.Reload);
}
break;
case RT_DEVICE_CTRL_WDT_START:
if (TYPE_WDT == wdtObj->type)
{
wdtObj->handle.wdt.Instance = WDT;
wdtObj->handle.wdt.Init.WDTMode = WDT_MODE_RST;
wdtObj->handle.wdt.Init.WDTINTCLRTIME = 0xffff;
HAL_WDT_Init(&wdtObj->handle.wdt);
HAL_WDT_Start(&wdtObj->handle.wdt);
}
else
{
wdtObj->handle.iwdt.Instance->CMDR = IWDT_ENABLE_COMMAND;
wdtObj->handle.iwdt.Init.Window = IWDT_RELOAD_MAX_VALUE; /* window function disabled when window >= reload */
wdtObj->handle.iwdt.Init.Wakeup = IWDT_RELOAD_MAX_VALUE; /* wakeup function disabled when wakeup >= reload */
HAL_IWDT_Init(&wdtObj->handle.iwdt);
}
wdtObj->is_start = 1;
break;
case RT_DEVICE_CTRL_WDT_STOP:
if (TYPE_WDT == wdtObj->type)
{
HAL_WDT_Stop(&wdtObj->handle.wdt);
}
else
{
wdtObj->handle.iwdt.Instance->CMDR = IWDT_DISABLE_COMMAND;
}
wdtObj->is_start = 0;
break;
default:
return -RT_ERROR;
}
return RT_EOK;
}
int rt_wdt_init(void)
{
ops.init = &wdt_init;
ops.control = &wdt_control;
#ifdef BSP_USING_WDT
acm32_wdt.type = TYPE_WDT;
acm32_wdt.is_start = 0;
acm32_wdt.watchdog.ops = &ops;
if (rt_hw_watchdog_register(&acm32_wdt.watchdog, WDT_NAME, RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
return -RT_ERROR;
}
#endif
#ifdef BSP_USING_IWDT
acm32_iwdt.type = TYPE_IWDT;
acm32_iwdt.is_start = 0;
acm32_iwdt.watchdog.ops = &ops;
if (rt_hw_watchdog_register(&acm32_iwdt.watchdog, IWDT_NAME, RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
return -RT_ERROR;
}
#endif
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_wdt_init);
#endif /* RT_USING_WDT */
|
