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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c @ 911:a2523e19f59a Evo_2_23

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author Ideenmodellierer
date Tue, 15 Oct 2024 20:00:37 +0200
parents c78bcbd5deda
children
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128
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_hal_pwr_ex.c
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4 * @author MCD Application Team
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5 * @brief Extended PWR HAL module driver.
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6 * This file provides firmware functions to manage the following
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7 * functionalities of PWR extension peripheral:
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8 * + Peripheral Extended features functions
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9 *
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10 ******************************************************************************
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11 * @attention
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12 *
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13 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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14 *
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15 * Redistribution and use in source and binary forms, with or without modification,
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16 * are permitted provided that the following conditions are met:
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17 * 1. Redistributions of source code must retain the above copyright notice,
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18 * this list of conditions and the following disclaimer.
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19 * 2. Redistributions in binary form must reproduce the above copyright notice,
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20 * this list of conditions and the following disclaimer in the documentation
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21 * and/or other materials provided with the distribution.
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22 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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23 * may be used to endorse or promote products derived from this software
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24 * without specific prior written permission.
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25 *
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26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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27 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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29 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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33 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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34 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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36 *
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37 ******************************************************************************
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38 */
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39
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40 /* Includes ------------------------------------------------------------------*/
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41 #include "stm32f4xx_hal.h"
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42
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43 /** @addtogroup STM32F4xx_HAL_Driver
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44 * @{
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45 */
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46
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47 /** @defgroup PWREx PWREx
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48 * @brief PWR HAL module driver
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49 * @{
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50 */
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51
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52 #ifdef HAL_PWR_MODULE_ENABLED
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53
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54 /* Private typedef -----------------------------------------------------------*/
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55 /* Private define ------------------------------------------------------------*/
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56 /** @addtogroup PWREx_Private_Constants
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57 * @{
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58 */
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59 #define PWR_OVERDRIVE_TIMEOUT_VALUE 1000U
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60 #define PWR_UDERDRIVE_TIMEOUT_VALUE 1000U
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61 #define PWR_BKPREG_TIMEOUT_VALUE 1000U
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62 #define PWR_VOSRDY_TIMEOUT_VALUE 1000U
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63 /**
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64 * @}
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65 */
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66
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67
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68 /* Private macro -------------------------------------------------------------*/
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69 /* Private variables ---------------------------------------------------------*/
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70 /* Private function prototypes -----------------------------------------------*/
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71 /* Private functions ---------------------------------------------------------*/
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72 /** @defgroup PWREx_Exported_Functions PWREx Exported Functions
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73 * @{
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74 */
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75
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76 /** @defgroup PWREx_Exported_Functions_Group1 Peripheral Extended features functions
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77 * @brief Peripheral Extended features functions
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78 *
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79 @verbatim
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80
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81 ===============================================================================
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82 ##### Peripheral extended features functions #####
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83 ===============================================================================
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84
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85 *** Main and Backup Regulators configuration ***
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86 ================================================
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87 [..]
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88 (+) The backup domain includes 4 Kbytes of backup SRAM accessible only from
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89 the CPU, and address in 32-bit, 16-bit or 8-bit mode. Its content is
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90 retained even in Standby or VBAT mode when the low power backup regulator
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91 is enabled. It can be considered as an internal EEPROM when VBAT is
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92 always present. You can use the HAL_PWREx_EnableBkUpReg() function to
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93 enable the low power backup regulator.
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94
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95 (+) When the backup domain is supplied by VDD (analog switch connected to VDD)
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96 the backup SRAM is powered from VDD which replaces the VBAT power supply to
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97 save battery life.
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98
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99 (+) The backup SRAM is not mass erased by a tamper event. It is read
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100 protected to prevent confidential data, such as cryptographic private
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101 key, from being accessed. The backup SRAM can be erased only through
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102 the Flash interface when a protection level change from level 1 to
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103 level 0 is requested.
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104 -@- Refer to the description of Read protection (RDP) in the Flash
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105 programming manual.
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106
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107 (+) The main internal regulator can be configured to have a tradeoff between
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108 performance and power consumption when the device does not operate at
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109 the maximum frequency. This is done through __HAL_PWR_MAINREGULATORMODE_CONFIG()
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110 macro which configure VOS bit in PWR_CR register
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111
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112 Refer to the product datasheets for more details.
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113
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114 *** FLASH Power Down configuration ****
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115 =======================================
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116 [..]
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117 (+) By setting the FPDS bit in the PWR_CR register by using the
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118 HAL_PWREx_EnableFlashPowerDown() function, the Flash memory also enters power
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119 down mode when the device enters Stop mode. When the Flash memory
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120 is in power down mode, an additional startup delay is incurred when
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121 waking up from Stop mode.
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122
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123 (+) For STM32F42xxx/43xxx/446xx/469xx/479xx Devices, the scale can be modified only when the PLL
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124 is OFF and the HSI or HSE clock source is selected as system clock.
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125 The new value programmed is active only when the PLL is ON.
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126 When the PLL is OFF, the voltage scale 3 is automatically selected.
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127 Refer to the datasheets for more details.
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128
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129 *** Over-Drive and Under-Drive configuration ****
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130 =================================================
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131 [..]
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132 (+) For STM32F42xxx/43xxx/446xx/469xx/479xx Devices, in Run mode: the main regulator has
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133 2 operating modes available:
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134 (++) Normal mode: The CPU and core logic operate at maximum frequency at a given
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135 voltage scaling (scale 1, scale 2 or scale 3)
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136 (++) Over-drive mode: This mode allows the CPU and the core logic to operate at a
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137 higher frequency than the normal mode for a given voltage scaling (scale 1,
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138 scale 2 or scale 3). This mode is enabled through HAL_PWREx_EnableOverDrive() function and
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139 disabled by HAL_PWREx_DisableOverDrive() function, to enter or exit from Over-drive mode please follow
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140 the sequence described in Reference manual.
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141
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142 (+) For STM32F42xxx/43xxx/446xx/469xx/479xx Devices, in Stop mode: the main regulator or low power regulator
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143 supplies a low power voltage to the 1.2V domain, thus preserving the content of registers
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144 and internal SRAM. 2 operating modes are available:
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145 (++) Normal mode: the 1.2V domain is preserved in nominal leakage mode. This mode is only
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146 available when the main regulator or the low power regulator is used in Scale 3 or
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147 low voltage mode.
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148 (++) Under-drive mode: the 1.2V domain is preserved in reduced leakage mode. This mode is only
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149 available when the main regulator or the low power regulator is in low voltage mode.
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150
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151 @endverbatim
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152 * @{
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153 */
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154
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155 /**
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156 * @brief Enables the Backup Regulator.
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157 * @retval HAL status
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158 */
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159 HAL_StatusTypeDef HAL_PWREx_EnableBkUpReg(void)
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160 {
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161 uint32_t tickstart = 0U;
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162
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163 *(__IO uint32_t *) CSR_BRE_BB = (uint32_t)ENABLE;
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164
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165 /* Get tick */
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166 tickstart = HAL_GetTick();
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167
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168 /* Wait till Backup regulator ready flag is set */
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169 while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) == RESET)
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170 {
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171 if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE)
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172 {
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173 return HAL_TIMEOUT;
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174 }
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175 }
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176 return HAL_OK;
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177 }
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178
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179 /**
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180 * @brief Disables the Backup Regulator.
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181 * @retval HAL status
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182 */
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183 HAL_StatusTypeDef HAL_PWREx_DisableBkUpReg(void)
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184 {
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185 uint32_t tickstart = 0U;
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186
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187 *(__IO uint32_t *) CSR_BRE_BB = (uint32_t)DISABLE;
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188
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189 /* Get tick */
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190 tickstart = HAL_GetTick();
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191
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192 /* Wait till Backup regulator ready flag is set */
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193 while(__HAL_PWR_GET_FLAG(PWR_FLAG_BRR) != RESET)
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194 {
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195 if((HAL_GetTick() - tickstart ) > PWR_BKPREG_TIMEOUT_VALUE)
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196 {
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197 return HAL_TIMEOUT;
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198 }
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199 }
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200 return HAL_OK;
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201 }
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202
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203 /**
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204 * @brief Enables the Flash Power Down in Stop mode.
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205 * @retval None
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206 */
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207 void HAL_PWREx_EnableFlashPowerDown(void)
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208 {
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209 *(__IO uint32_t *) CR_FPDS_BB = (uint32_t)ENABLE;
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210 }
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211
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212 /**
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213 * @brief Disables the Flash Power Down in Stop mode.
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214 * @retval None
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215 */
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216 void HAL_PWREx_DisableFlashPowerDown(void)
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217 {
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218 *(__IO uint32_t *) CR_FPDS_BB = (uint32_t)DISABLE;
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219 }
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220
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221 /**
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222 * @brief Return Voltage Scaling Range.
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223 * @retval The configured scale for the regulator voltage(VOS bit field).
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224 * The returned value can be one of the following:
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225 * - @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output Scale 1 mode
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226 * - @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output Scale 2 mode
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227 * - @arg PWR_REGULATOR_VOLTAGE_SCALE3: Regulator voltage output Scale 3 mode
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228 */
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229 uint32_t HAL_PWREx_GetVoltageRange(void)
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230 {
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231 return (PWR->CR & PWR_CR_VOS);
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232 }
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233
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234 #if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx)
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235 /**
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236 * @brief Configures the main internal regulator output voltage.
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237 * @param VoltageScaling specifies the regulator output voltage to achieve
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238 * a tradeoff between performance and power consumption.
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239 * This parameter can be one of the following values:
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240 * @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output range 1 mode,
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241 * the maximum value of fHCLK = 168 MHz.
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242 * @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output range 2 mode,
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243 * the maximum value of fHCLK = 144 MHz.
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244 * @note When moving from Range 1 to Range 2, the system frequency must be decreased to
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245 * a value below 144 MHz before calling HAL_PWREx_ConfigVoltageScaling() API.
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246 * When moving from Range 2 to Range 1, the system frequency can be increased to
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247 * a value up to 168 MHz after calling HAL_PWREx_ConfigVoltageScaling() API.
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248 * @retval HAL Status
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249 */
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250 HAL_StatusTypeDef HAL_PWREx_ControlVoltageScaling(uint32_t VoltageScaling)
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251 {
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252 uint32_t tickstart = 0U;
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253
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254 assert_param(IS_PWR_VOLTAGE_SCALING_RANGE(VoltageScaling));
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255
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256 /* Enable PWR RCC Clock Peripheral */
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257 __HAL_RCC_PWR_CLK_ENABLE();
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258
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259 /* Set Range */
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260 __HAL_PWR_VOLTAGESCALING_CONFIG(VoltageScaling);
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261
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262 /* Get Start Tick*/
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263 tickstart = HAL_GetTick();
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264 while((__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) == RESET))
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265 {
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266 if((HAL_GetTick() - tickstart ) > PWR_VOSRDY_TIMEOUT_VALUE)
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267 {
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268 return HAL_TIMEOUT;
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269 }
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270 }
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271
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272 return HAL_OK;
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273 }
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274
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275 #elif defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) || \
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276 defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F410Tx) || defined(STM32F410Cx) || \
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277 defined(STM32F410Rx) || defined(STM32F411xE) || defined(STM32F446xx) || defined(STM32F469xx) || \
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278 defined(STM32F479xx) || defined(STM32F412Zx) || defined(STM32F412Vx) || defined(STM32F412Rx) || \
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279 defined(STM32F412Cx) || defined(STM32F413xx) || defined(STM32F423xx)
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280 /**
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281 * @brief Configures the main internal regulator output voltage.
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282 * @param VoltageScaling specifies the regulator output voltage to achieve
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283 * a tradeoff between performance and power consumption.
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284 * This parameter can be one of the following values:
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285 * @arg PWR_REGULATOR_VOLTAGE_SCALE1: Regulator voltage output range 1 mode,
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286 * the maximum value of fHCLK is 168 MHz. It can be extended to
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287 * 180 MHz by activating the over-drive mode.
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288 * @arg PWR_REGULATOR_VOLTAGE_SCALE2: Regulator voltage output range 2 mode,
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289 * the maximum value of fHCLK is 144 MHz. It can be extended to,
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290 * 168 MHz by activating the over-drive mode.
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291 * @arg PWR_REGULATOR_VOLTAGE_SCALE3: Regulator voltage output range 3 mode,
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292 * the maximum value of fHCLK is 120 MHz.
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293 * @note To update the system clock frequency(SYSCLK):
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294 * - Set the HSI or HSE as system clock frequency using the HAL_RCC_ClockConfig().
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295 * - Call the HAL_RCC_OscConfig() to configure the PLL.
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296 * - Call HAL_PWREx_ConfigVoltageScaling() API to adjust the voltage scale.
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297 * - Set the new system clock frequency using the HAL_RCC_ClockConfig().
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298 * @note The scale can be modified only when the HSI or HSE clock source is selected
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299 * as system clock source, otherwise the API returns HAL_ERROR.
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300 * @note When the PLL is OFF, the voltage scale 3 is automatically selected and the VOS bits
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301 * value in the PWR_CR1 register are not taken in account.
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302 * @note This API forces the PLL state ON to allow the possibility to configure the voltage scale 1 or 2.
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303 * @note The new voltage scale is active only when the PLL is ON.
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304 * @retval HAL Status
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305 */
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306 HAL_StatusTypeDef HAL_PWREx_ControlVoltageScaling(uint32_t VoltageScaling)
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307 {
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308 uint32_t tickstart = 0U;
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309
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310 assert_param(IS_PWR_VOLTAGE_SCALING_RANGE(VoltageScaling));
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311
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312 /* Enable PWR RCC Clock Peripheral */
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313 __HAL_RCC_PWR_CLK_ENABLE();
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314
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315 /* Check if the PLL is used as system clock or not */
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316 if(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_CFGR_SWS_PLL)
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317 {
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318 /* Disable the main PLL */
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319 __HAL_RCC_PLL_DISABLE();
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320
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321 /* Get Start Tick */
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322 tickstart = HAL_GetTick();
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323 /* Wait till PLL is disabled */
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324 while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
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325 {
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326 if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
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327 {
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328 return HAL_TIMEOUT;
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329 }
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330 }
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331
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332 /* Set Range */
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333 __HAL_PWR_VOLTAGESCALING_CONFIG(VoltageScaling);
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334
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335 /* Enable the main PLL */
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336 __HAL_RCC_PLL_ENABLE();
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337
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338 /* Get Start Tick */
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339 tickstart = HAL_GetTick();
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340 /* Wait till PLL is ready */
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341 while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET)
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342 {
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343 if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
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344 {
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345 return HAL_TIMEOUT;
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346 }
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347 }
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348
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349 /* Get Start Tick */
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350 tickstart = HAL_GetTick();
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351 while((__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) == RESET))
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352 {
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353 if((HAL_GetTick() - tickstart ) > PWR_VOSRDY_TIMEOUT_VALUE)
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354 {
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355 return HAL_TIMEOUT;
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356 }
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357 }
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358 }
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359 else
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360 {
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361 return HAL_ERROR;
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362 }
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363
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364 return HAL_OK;
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365 }
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366 #endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx */
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367
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368 #if defined(STM32F469xx) || defined(STM32F479xx)
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369 /**
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370 * @brief Enables Wakeup Pin Detection on high level (rising edge).
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371 * @retval None
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372 */
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373 void HAL_PWREx_EnableWakeUpPinPolarityRisingEdge(void)
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374 {
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375 *(__IO uint32_t *) CSR_WUPP_BB = (uint32_t)DISABLE;
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376 }
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377
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378 /**
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379 * @brief Enables Wakeup Pin Detection on low level (falling edge).
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380 * @retval None
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381 */
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382 void HAL_PWREx_EnableWakeUpPinPolarityFallingEdge(void)
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383 {
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384 *(__IO uint32_t *) CSR_WUPP_BB = (uint32_t)ENABLE;
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385 }
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386 #endif /* STM32F469xx || STM32F479xx */
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387
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388 #if defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F410Tx) || defined(STM32F410Cx) || defined(STM32F410Rx) ||\
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389 defined(STM32F411xE) || defined(STM32F412Zx) || defined(STM32F412Vx) || defined(STM32F412Rx) || defined(STM32F412Cx) ||\
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390 defined(STM32F413xx) || defined(STM32F423xx)
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391 /**
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392 * @brief Enables Main Regulator low voltage mode.
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393 * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx/STM32F412Zx/STM32F412Rx/STM32F412Vx/STM32F412Cx/
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394 * STM32F413xx/STM32F423xx devices.
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395 * @retval None
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396 */
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397 void HAL_PWREx_EnableMainRegulatorLowVoltage(void)
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398 {
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399 *(__IO uint32_t *) CR_MRLVDS_BB = (uint32_t)ENABLE;
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400 }
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401
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402 /**
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403 * @brief Disables Main Regulator low voltage mode.
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404 * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx/STM32F412Zx/STM32F412Rx/STM32F412Vx/STM32F412Cx/
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405 * STM32F413xx/STM32F423xxdevices.
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406 * @retval None
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407 */
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408 void HAL_PWREx_DisableMainRegulatorLowVoltage(void)
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409 {
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410 *(__IO uint32_t *) CR_MRLVDS_BB = (uint32_t)DISABLE;
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411 }
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412
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413 /**
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414 * @brief Enables Low Power Regulator low voltage mode.
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415 * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx/STM32F412Zx/STM32F412Rx/STM32F412Vx/STM32F412Cx/
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416 * STM32F413xx/STM32F423xx devices.
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417 * @retval None
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418 */
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419 void HAL_PWREx_EnableLowRegulatorLowVoltage(void)
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420 {
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421 *(__IO uint32_t *) CR_LPLVDS_BB = (uint32_t)ENABLE;
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422 }
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423
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424 /**
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425 * @brief Disables Low Power Regulator low voltage mode.
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426 * @note This mode is only available for STM32F401xx/STM32F410xx/STM32F411xx/STM32F412Zx/STM32F412Rx/STM32F412Vx/STM32F412Cx/
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427 * STM32F413xx/STM32F423xx devices.
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428 * @retval None
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429 */
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430 void HAL_PWREx_DisableLowRegulatorLowVoltage(void)
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431 {
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432 *(__IO uint32_t *) CR_LPLVDS_BB = (uint32_t)DISABLE;
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433 }
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434
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435 #endif /* STM32F401xC || STM32F401xE || STM32F410xx || STM32F411xE || STM32F412Zx || STM32F412Rx || STM32F412Vx || STM32F412Cx ||
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436 STM32F413xx || STM32F423xx */
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437
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438 #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\
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439 defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx)
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440 /**
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441 * @brief Activates the Over-Drive mode.
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442 * @note This function can be used only for STM32F42xx/STM32F43xx/STM32F446xx/STM32F469xx/STM32F479xx devices.
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443 * This mode allows the CPU and the core logic to operate at a higher frequency
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444 * than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3).
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445 * @note It is recommended to enter or exit Over-drive mode when the application is not running
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446 * critical tasks and when the system clock source is either HSI or HSE.
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447 * During the Over-drive switch activation, no peripheral clocks should be enabled.
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448 * The peripheral clocks must be enabled once the Over-drive mode is activated.
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449 * @retval HAL status
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450 */
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451 HAL_StatusTypeDef HAL_PWREx_EnableOverDrive(void)
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452 {
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453 uint32_t tickstart = 0U;
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454
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455 __HAL_RCC_PWR_CLK_ENABLE();
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456
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457 /* Enable the Over-drive to extend the clock frequency to 180 Mhz */
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458 __HAL_PWR_OVERDRIVE_ENABLE();
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459
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460 /* Get tick */
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461 tickstart = HAL_GetTick();
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462
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463 while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY))
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464 {
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465 if((HAL_GetTick() - tickstart) > PWR_OVERDRIVE_TIMEOUT_VALUE)
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466 {
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467 return HAL_TIMEOUT;
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468 }
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469 }
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470
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471 /* Enable the Over-drive switch */
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472 __HAL_PWR_OVERDRIVESWITCHING_ENABLE();
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473
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474 /* Get tick */
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475 tickstart = HAL_GetTick();
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476
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477 while(!__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY))
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478 {
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479 if((HAL_GetTick() - tickstart ) > PWR_OVERDRIVE_TIMEOUT_VALUE)
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480 {
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481 return HAL_TIMEOUT;
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482 }
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483 }
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484 return HAL_OK;
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485 }
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486
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487 /**
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488 * @brief Deactivates the Over-Drive mode.
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489 * @note This function can be used only for STM32F42xx/STM32F43xx/STM32F446xx/STM32F469xx/STM32F479xx devices.
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490 * This mode allows the CPU and the core logic to operate at a higher frequency
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491 * than the normal mode for a given voltage scaling (scale 1, scale 2 or scale 3).
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492 * @note It is recommended to enter or exit Over-drive mode when the application is not running
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493 * critical tasks and when the system clock source is either HSI or HSE.
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494 * During the Over-drive switch activation, no peripheral clocks should be enabled.
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495 * The peripheral clocks must be enabled once the Over-drive mode is activated.
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496 * @retval HAL status
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497 */
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498 HAL_StatusTypeDef HAL_PWREx_DisableOverDrive(void)
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499 {
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500 uint32_t tickstart = 0U;
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501
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502 __HAL_RCC_PWR_CLK_ENABLE();
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503
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504 /* Disable the Over-drive switch */
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505 __HAL_PWR_OVERDRIVESWITCHING_DISABLE();
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506
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507 /* Get tick */
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508 tickstart = HAL_GetTick();
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509
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510 while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODSWRDY))
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511 {
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512 if((HAL_GetTick() - tickstart) > PWR_OVERDRIVE_TIMEOUT_VALUE)
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513 {
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514 return HAL_TIMEOUT;
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515 }
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516 }
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517
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518 /* Disable the Over-drive */
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519 __HAL_PWR_OVERDRIVE_DISABLE();
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520
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521 /* Get tick */
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522 tickstart = HAL_GetTick();
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523
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524 while(__HAL_PWR_GET_FLAG(PWR_FLAG_ODRDY))
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525 {
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526 if((HAL_GetTick() - tickstart) > PWR_OVERDRIVE_TIMEOUT_VALUE)
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527 {
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528 return HAL_TIMEOUT;
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529 }
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530 }
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531
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532 return HAL_OK;
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533 }
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534
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535 /**
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536 * @brief Enters in Under-Drive STOP mode.
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537 *
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538 * @note This mode is only available for STM32F42xxx/STM32F43xxx/STM32F446xx/STM32F469xx/STM32F479xx devices.
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539 *
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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540 * @note This mode can be selected only when the Under-Drive is already active
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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541 *
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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542 * @note This mode is enabled only with STOP low power mode.
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543 * In this mode, the 1.2V domain is preserved in reduced leakage mode. This
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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544 * mode is only available when the main regulator or the low power regulator
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545 * is in low voltage mode
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546 *
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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547 * @note If the Under-drive mode was enabled, it is automatically disabled after
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548 * exiting Stop mode.
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549 * When the voltage regulator operates in Under-drive mode, an additional
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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550 * startup delay is induced when waking up from Stop mode.
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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551 *
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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552 * @note In Stop mode, all I/O pins keep the same state as in Run mode.
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553 *
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554 * @note When exiting Stop mode by issuing an interrupt or a wake-up event,
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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555 * the HSI RC oscillator is selected as system clock.
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556 *
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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557 * @note When the voltage regulator operates in low power mode, an additional
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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558 * startup delay is incurred when waking up from Stop mode.
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559 * By keeping the internal regulator ON during Stop mode, the consumption
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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560 * is higher although the startup time is reduced.
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561 *
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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562 * @param Regulator specifies the regulator state in STOP mode.
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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563 * This parameter can be one of the following values:
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564 * @arg PWR_MAINREGULATOR_UNDERDRIVE_ON: Main Regulator in under-drive mode
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565 * and Flash memory in power-down when the device is in Stop under-drive mode
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566 * @arg PWR_LOWPOWERREGULATOR_UNDERDRIVE_ON: Low Power Regulator in under-drive mode
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567 * and Flash memory in power-down when the device is in Stop under-drive mode
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568 * @param STOPEntry specifies if STOP mode in entered with WFI or WFE instruction.
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569 * This parameter can be one of the following values:
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570 * @arg PWR_SLEEPENTRY_WFI: enter STOP mode with WFI instruction
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571 * @arg PWR_SLEEPENTRY_WFE: enter STOP mode with WFE instruction
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572 * @retval None
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573 */
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574 HAL_StatusTypeDef HAL_PWREx_EnterUnderDriveSTOPMode(uint32_t Regulator, uint8_t STOPEntry)
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575 {
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576 uint32_t tmpreg1 = 0U;
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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577
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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578 /* Check the parameters */
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579 assert_param(IS_PWR_REGULATOR_UNDERDRIVE(Regulator));
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580 assert_param(IS_PWR_STOP_ENTRY(STOPEntry));
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581
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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582 /* Enable Power ctrl clock */
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583 __HAL_RCC_PWR_CLK_ENABLE();
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584 /* Enable the Under-drive Mode ---------------------------------------------*/
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585 /* Clear Under-drive flag */
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586 __HAL_PWR_CLEAR_ODRUDR_FLAG();
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587
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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588 /* Enable the Under-drive */
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589 __HAL_PWR_UNDERDRIVE_ENABLE();
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590
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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591 /* Select the regulator state in STOP mode ---------------------------------*/
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592 tmpreg1 = PWR->CR;
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593 /* Clear PDDS, LPDS, MRLUDS and LPLUDS bits */
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594 tmpreg1 &= (uint32_t)~(PWR_CR_PDDS | PWR_CR_LPDS | PWR_CR_LPUDS | PWR_CR_MRUDS);
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595
c78bcbd5deda Added current STM32 standandard libraries in version independend folder structure
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596 /* Set LPDS, MRLUDS and LPLUDS bits according to PWR_Regulator value */
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597 tmpreg1 |= Regulator;
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598
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599 /* Store the new value */
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600 PWR->CR = tmpreg1;
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601
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602 /* Set SLEEPDEEP bit of Cortex System Control Register */
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603 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
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604
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605 /* Select STOP mode entry --------------------------------------------------*/
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606 if(STOPEntry == PWR_SLEEPENTRY_WFI)
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607 {
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608 /* Request Wait For Interrupt */
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609 __WFI();
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610 }
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611 else
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612 {
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613 /* Request Wait For Event */
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614 __WFE();
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615 }
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616 /* Reset SLEEPDEEP bit of Cortex System Control Register */
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617 SCB->SCR &= (uint32_t)~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
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618
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619 return HAL_OK;
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620 }
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621
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622 #endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx || STM32F479xx */
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623 /**
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624 * @}
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625 */
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626
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627 /**
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628 * @}
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629 */
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630
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631 #endif /* HAL_PWR_MODULE_ENABLED */
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632 /**
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633 * @}
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634 */
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635
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636 /**
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637 * @}
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638 */
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639
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640 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/