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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_hal_flash_ramfunc.c
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4 * @author MCD Application Team
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5 * @version V1.2.0
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6 * @date 26-December-2014
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7 * @brief FLASH RAMFUNC module driver.
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8 * This file provides a FLASH firmware functions which should be
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9 * executed from internal SRAM
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10 * + Stop/Start the flash interface while System Run
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11 * + Enable/Disable the flash sleep while System Run
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12 @verbatim
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13 ==============================================================================
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14 ##### APIs executed from Internal RAM #####
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15 ==============================================================================
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16 [..]
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17 *** ARM Compiler ***
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18 --------------------
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19 [..] RAM functions are defined using the toolchain options.
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20 Functions that are be executed in RAM should reside in a separate
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21 source module. Using the 'Options for File' dialog you can simply change
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22 the 'Code / Const' area of a module to a memory space in physical RAM.
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23 Available memory areas are declared in the 'Target' tab of the
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24 Options for Target' dialog.
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25
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26 *** ICCARM Compiler ***
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27 -----------------------
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28 [..] RAM functions are defined using a specific toolchain keyword "__ramfunc".
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29
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30 *** GNU Compiler ***
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31 --------------------
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32 [..] RAM functions are defined using a specific toolchain attribute
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33 "__attribute__((section(".RamFunc")))".
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34
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35 @endverbatim
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36 ******************************************************************************
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37 * @attention
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38 *
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39 * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
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40 *
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41 * Redistribution and use in source and binary forms, with or without modification,
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42 * are permitted provided that the following conditions are met:
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43 * 1. Redistributions of source code must retain the above copyright notice,
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44 * this list of conditions and the following disclaimer.
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45 * 2. Redistributions in binary form must reproduce the above copyright notice,
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46 * this list of conditions and the following disclaimer in the documentation
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47 * and/or other materials provided with the distribution.
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48 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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49 * may be used to endorse or promote products derived from this software
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50 * without specific prior written permission.
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51 *
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52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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53 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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55 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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58 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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59 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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60 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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62 *
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63 ******************************************************************************
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64 */
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65
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66 /* Includes ------------------------------------------------------------------*/
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67 #include "stm32f4xx_hal.h"
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68
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69 /** @addtogroup STM32F4xx_HAL_Driver
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70 * @{
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71 */
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72
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73 /** @defgroup FLASH_RAMFUNC FLASH RAMFUNC
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74 * @brief FLASH functions executed from RAM
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75 * @{
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76 */
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77
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78 #ifdef HAL_FLASH_MODULE_ENABLED
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79
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80 #if defined(STM32F411xE)
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81
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82 /* Private typedef -----------------------------------------------------------*/
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83 /* Private define ------------------------------------------------------------*/
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84 /* Private macro -------------------------------------------------------------*/
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85 /* Private variables ---------------------------------------------------------*/
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86 /* Private function prototypes -----------------------------------------------*/
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87 /* Exported functions --------------------------------------------------------*/
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88 /** @defgroup FLASH_RAMFUNC_Exported_Functions FLASH RAMFUNC Exported Functions
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89 * @{
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90 */
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91
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92 /** @defgroup FLASH_RAMFUNC_Exported_Functions_Group1 Peripheral features functions executed from internal RAM
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93 * @brief Peripheral Extended features functions
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94 *
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95 @verbatim
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96
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97 ===============================================================================
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98 ##### ramfunc functions #####
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99 ===============================================================================
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100 [..]
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101 This subsection provides a set of functions that should be executed from RAM
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102 transfers.
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103
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104 @endverbatim
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105 * @{
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106 */
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107
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108 /**
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109 * @brief Stop the flash interface while System Run
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110 * @note This mode is only available for STM32F411xx devices.
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111 * @note This mode couldn't be set while executing with the flash itself.
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112 * It should be done with specific routine executed from RAM.
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113 * @retval None
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114 */
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115 __RAM_FUNC HAL_FLASHEx_StopFlashInterfaceClk(void)
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116 {
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117 /* Enable Power ctrl clock */
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118 __HAL_RCC_PWR_CLK_ENABLE();
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119 /* Stop the flash interface while System Run */
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120 SET_BIT(PWR->CR, PWR_CR_FISSR);
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121
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122 return HAL_OK;
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123 }
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124
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125 /**
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126 * @brief Start the flash interface while System Run
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127 * @note This mode is only available for STM32F411xx devices.
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128 * @note This mode couldn't be set while executing with the flash itself.
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129 * It should be done with specific routine executed from RAM.
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130 * @retval None
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131 */
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132 __RAM_FUNC HAL_FLASHEx_StartFlashInterfaceClk(void)
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133 {
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134 /* Enable Power ctrl clock */
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135 __HAL_RCC_PWR_CLK_ENABLE();
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136 /* Start the flash interface while System Run */
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137 CLEAR_BIT(PWR->CR, PWR_CR_FISSR);
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138
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139 return HAL_OK;
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140 }
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141
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142 /**
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143 * @brief Enable the flash sleep while System Run
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144 * @note This mode is only available for STM32F411xx devices.
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145 * @note This mode could n't be set while executing with the flash itself.
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146 * It should be done with specific routine executed from RAM.
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147 * @retval None
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148 */
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149 __RAM_FUNC HAL_FLASHEx_EnableFlashSleepMode(void)
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150 {
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151 /* Enable Power ctrl clock */
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152 __HAL_RCC_PWR_CLK_ENABLE();
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153 /* Enable the flash sleep while System Run */
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154 SET_BIT(PWR->CR, PWR_CR_FMSSR);
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155
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156 return HAL_OK;
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157 }
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158
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159 /**
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160 * @brief Disable the flash sleep while System Run
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161 * @note This mode is only available for STM32F411xx devices.
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162 * @note This mode could n't be set while executing with the flash itself.
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163 * It should be done with specific routine executed from RAM.
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164 * @retval None
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165 */
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166 __RAM_FUNC HAL_FLASHEx_DisableFlashSleepMode(void)
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167 {
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168 /* Enable Power ctrl clock */
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169 __HAL_RCC_PWR_CLK_ENABLE();
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170 /* Disable the flash sleep while System Run */
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171 CLEAR_BIT(PWR->CR, PWR_CR_FMSSR);
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172
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173 return HAL_OK;
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174 }
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175
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176 /**
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177 * @}
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178 */
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179
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180 /**
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181 * @}
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182 */
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183
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184 #endif /* STM32F411xE */
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185 #endif /* HAL_FLASH_MODULE_ENABLED */
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186 /**
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187 * @}
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188 */
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189
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190 /**
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191 * @}
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192 */
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193
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194 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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