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
275
276
277
|
/****************************************************************************
* configs/mikroe_stm32f4/src/up_idle.c
* arch/arm/src/board/up_idle.c
*
* Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <gnutt@nuttx.org>
* Diego Sanchez <dsanchez@nx-engineering.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <arch/board/board.h>
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <nuttx/clock.h>
#include <nuttx/power/pm.h>
#include <debug.h>
#include <nuttx/rtc.h>
#include <arch/irq.h>
#include "up_internal.h"
#include "stm32_pm.h"
#include "stm32_rcc.h"
#include "stm32_exti.h"
#include "mikroe-stm32f4-internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Does the board support an IDLE LED to indicate that the board is in the
* IDLE state?
*/
#if defined(CONFIG_ARCH_LEDS) && defined(LED_IDLE)
# define BEGIN_IDLE() board_led_on(LED_IDLE)
# define END_IDLE() board_led_off(LED_IDLE)
#else
# define BEGIN_IDLE()
# define END_IDLE()
#endif
/* Values for the RTC Alarm to wake up from the PM_STANDBY mode */
#ifndef CONFIG_PM_ALARM_SEC
# define CONFIG_PM_ALARM_SEC 3
#endif
#ifndef CONFIG_PM_ALARM_NSEC
# define CONFIG_PM_ALARM_NSEC 0
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#if defined(CONFIG_PM) && defined(CONFIG_RTC_ALARM)
static void up_alarmcb(void);
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: up_idlepm
*
* Description:
* Perform IDLE state power management.
*
****************************************************************************/
#ifdef CONFIG_PM
static void up_idlepm(void)
{
#ifdef CONFIG_RTC_ALARM
struct timespec alarmtime;
#endif
static enum pm_state_e oldstate = PM_NORMAL;
enum pm_state_e newstate;
irqstate_t flags;
int ret;
/* Decide, which power saving level can be obtained */
newstate = pm_checkstate();
/* Check for state changes */
if (newstate != oldstate)
{
lldbg("newstate= %d oldstate=%d\n", newstate, oldstate);
flags = irqsave();
/* Force the global state change */
ret = pm_changestate(newstate);
if (ret < 0)
{
/* The new state change failed, revert to the preceding state */
(void)pm_changestate(oldstate);
/* No state change... */
goto errout;
}
/* Then perform board-specific, state-dependent logic here */
switch (newstate)
{
case PM_NORMAL:
{
}
break;
case PM_IDLE:
{
}
break;
case PM_STANDBY:
{
#ifdef CONFIG_RTC_ALARM
/* Disable RTC Alarm interrupt */
#warning "missing logic"
/* Configure the RTC alarm to Auto Wake the system */
#warning "missing logic"
/* The tv_nsec value must not exceed 1,000,000,000. That
* would be an invalid time.
*/
#warning "missing logic"
/* Set the alarm */
#warning "missing logic"
#endif
/* Call the STM32 stop mode */
stm32_pmstop(true);
/* We have been re-awakened by some even: A button press?
* An alarm? Cancel any pending alarm and resume the normal
* operation.
*/
#ifdef CONFIG_RTC_ALARM
#warning "missing logic"
#endif
/* Resume normal operation */
pm_changestate(PM_NORMAL);
newstate = PM_NORMAL;
}
break;
case PM_SLEEP:
{
/* We should not return from standby mode. The only way out
* of standby is via the reset path.
*/
(void)stm32_pmstandby();
}
break;
default:
break;
}
/* Save the new state */
oldstate = newstate;
errout:
irqrestore(flags);
}
}
#else
# define up_idlepm()
#endif
/************************************************************************************
* Name: up_alarmcb
*
* Description:
* RTC alarm service routine
*
************************************************************************************/
#if defined(CONFIG_PM) && defined(CONFIG_RTC_ALARM)
static void up_alarmcb(void)
{
/* This alarm occurs because there wasn't any EXTI interrupt during the
* PM_STANDBY period. So just go to sleep.
*/
pm_changestate(PM_SLEEP);
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_idle
*
* Description:
* up_idle() is the logic that will be executed when their is no other
* ready-to-run task. This is processor idle time and will continue until
* some interrupt occurs to cause a context switch from the idle task.
*
* Processing in this state may be processor-specific. e.g., this is where
* power management operations might be performed.
*
****************************************************************************/
void up_idle(void)
{
#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS)
/* If the system is idle and there are no timer interrupts, then process
* "fake" timer interrupts. Hopefully, something will wake up.
*/
sched_process_timer();
#else
/* Perform IDLE mode power management */
BEGIN_IDLE();
up_idlepm();
END_IDLE();
#endif
}
|