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
|
/**
******************************************************************************
* @file stm32l0xx_hal_pwr_ex.c
* @author MCD Application Team
* @brief Extended PWR HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the Power Controller (PWR) peripheral:
* + Extended Initialization and de-initialization functions
* + Extended Peripheral Control functions
*
******************************************************************************
* @attention
*
* <h2><center>© Copyright(c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l0xx_hal.h"
#ifdef HAL_PWR_MODULE_ENABLED
/** @addtogroup STM32L0xx_HAL_Driver
* @{
*/
/** @addtogroup PWREx
* @{
*/
/** @addtogroup PWREx_Private
* @{
*/
/** @defgroup PWR_Extended_TimeOut_Value PWREx Flag Setting Time Out Value
* @{
*/
#define PWR_FLAG_SETTING_DELAY_US 50U
/**
* @}
*/
/**
* @}
*/
/** @addtogroup PWREx_Exported_Functions
* @brief Low Power modes configuration functions
*
@verbatim
===============================================================================
##### Peripheral extended features functions #####
===============================================================================
@endverbatim
* @{
*/
/**
* @brief Return Voltage Scaling Range.
* @retval VOS bit field (PWR_REGULATOR_VOLTAGE_SCALE1, PWR_REGULATOR_VOLTAGE_SCALE2 or PWR_REGULATOR_VOLTAGE_SCALE3)
*/
uint32_t HAL_PWREx_GetVoltageRange(void)
{
return (PWR->CR & PWR_CR_VOS);
}
/**
* @brief Enables the Fast WakeUp from Ultra Low Power mode.
* @note This bit works in conjunction with ULP bit.
* Means, when ULP = 1 and FWU = 1 :VREFINT startup time is ignored when
* exiting from low power mode.
* @retval None
*/
void HAL_PWREx_EnableFastWakeUp(void)
{
/* Enable the fast wake up */
SET_BIT(PWR->CR, PWR_CR_FWU);
}
/**
* @brief Disables the Fast WakeUp from Ultra Low Power mode.
* @retval None
*/
void HAL_PWREx_DisableFastWakeUp(void)
{
/* Disable the fast wake up */
CLEAR_BIT(PWR->CR, PWR_CR_FWU);
}
/**
* @brief Enables the Ultra Low Power mode
* @retval None
*/
void HAL_PWREx_EnableUltraLowPower(void)
{
/* Enable the Ultra Low Power mode */
SET_BIT(PWR->CR, PWR_CR_ULP);
}
/**
* @brief Disables the Ultra Low Power mode
* @retval None
*/
void HAL_PWREx_DisableUltraLowPower(void)
{
/* Disable the Ultra Low Power mode */
CLEAR_BIT(PWR->CR, PWR_CR_ULP);
}
/**
* @brief Enable the Low Power Run mode.
* @note Low power run mode can only be entered when VCORE is in range 2.
* In addition, the dynamic voltage scaling must not be used when Low
* power run mode is selected. Only Stop and Sleep modes with regulator
* configured in Low power mode is allowed when Low power run mode is
* selected.
* @note The frequency of the system clock must be decreased to not exceed the
* frequency of RCC_MSIRANGE_1.
* @note In Low power run mode, all I/O pins keep the same state as in Run mode.
* @retval None
*/
void HAL_PWREx_EnableLowPowerRunMode(void)
{
/* Enters the Low Power Run mode */
SET_BIT(PWR->CR, PWR_CR_LPSDSR);
SET_BIT(PWR->CR, PWR_CR_LPRUN);
}
/**
* @brief Disable the Low Power Run mode.
* @note Before HAL_PWREx_DisableLowPowerRunMode() completion, the function checks that
* REGLPF has been properly reset (otherwise, HAL_PWREx_DisableLowPowerRunMode
* returns HAL_TIMEOUT status). The system clock frequency can then be
* increased above 2 MHz.
* @retval HAL_StatusTypeDef
*/
HAL_StatusTypeDef HAL_PWREx_DisableLowPowerRunMode(void)
{
uint32_t wait_loop_index = 0U;
/* Exit the Low Power Run mode */
CLEAR_BIT(PWR->CR, PWR_CR_LPRUN);
CLEAR_BIT(PWR->CR, PWR_CR_LPSDSR);
/* Wait until REGLPF is reset */
wait_loop_index = (PWR_FLAG_SETTING_DELAY_US * (SystemCoreClock / 1000000U));
while ((wait_loop_index != 0U) && (HAL_IS_BIT_SET(PWR->CSR, PWR_CSR_REGLPF)))
{
wait_loop_index--;
}
if (HAL_IS_BIT_SET(PWR->CSR, PWR_CSR_REGLPF))
{
return HAL_TIMEOUT;
}
return HAL_OK;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* HAL_PWR_MODULE_ENABLED */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
