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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_bkp.c @ 0:c59513fd84fb
Initial commit of STM32 test code.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Mon, 03 Oct 2011 21:19:15 +1030 |
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1 /** |
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2 ****************************************************************************** |
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3 * @file stm32f10x_bkp.c |
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4 * @author MCD Application Team |
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5 * @version V3.5.0 |
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6 * @date 11-March-2011 |
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7 * @brief This file provides all the BKP firmware functions. |
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8 ****************************************************************************** |
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9 * @attention |
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10 * |
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11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
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13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
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14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
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15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
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16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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17 * |
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18 * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> |
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19 ****************************************************************************** |
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20 */ |
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21 |
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22 /* Includes ------------------------------------------------------------------*/ |
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23 #include "stm32f10x_bkp.h" |
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24 #include "stm32f10x_rcc.h" |
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25 |
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26 /** @addtogroup STM32F10x_StdPeriph_Driver |
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27 * @{ |
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28 */ |
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29 |
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30 /** @defgroup BKP |
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31 * @brief BKP driver modules |
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32 * @{ |
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33 */ |
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34 |
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35 /** @defgroup BKP_Private_TypesDefinitions |
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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 * @} |
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41 */ |
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42 |
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43 /** @defgroup BKP_Private_Defines |
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44 * @{ |
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45 */ |
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46 |
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47 /* ------------ BKP registers bit address in the alias region --------------- */ |
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48 #define BKP_OFFSET (BKP_BASE - PERIPH_BASE) |
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49 |
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50 /* --- CR Register ----*/ |
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51 |
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52 /* Alias word address of TPAL bit */ |
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53 #define CR_OFFSET (BKP_OFFSET + 0x30) |
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54 #define TPAL_BitNumber 0x01 |
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55 #define CR_TPAL_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPAL_BitNumber * 4)) |
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56 |
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57 /* Alias word address of TPE bit */ |
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58 #define TPE_BitNumber 0x00 |
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59 #define CR_TPE_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (TPE_BitNumber * 4)) |
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60 |
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61 /* --- CSR Register ---*/ |
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62 |
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63 /* Alias word address of TPIE bit */ |
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64 #define CSR_OFFSET (BKP_OFFSET + 0x34) |
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65 #define TPIE_BitNumber 0x02 |
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66 #define CSR_TPIE_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TPIE_BitNumber * 4)) |
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67 |
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68 /* Alias word address of TIF bit */ |
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69 #define TIF_BitNumber 0x09 |
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70 #define CSR_TIF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TIF_BitNumber * 4)) |
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71 |
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72 /* Alias word address of TEF bit */ |
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73 #define TEF_BitNumber 0x08 |
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74 #define CSR_TEF_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TEF_BitNumber * 4)) |
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75 |
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76 /* ---------------------- BKP registers bit mask ------------------------ */ |
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77 |
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78 /* RTCCR register bit mask */ |
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79 #define RTCCR_CAL_MASK ((uint16_t)0xFF80) |
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80 #define RTCCR_MASK ((uint16_t)0xFC7F) |
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81 |
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82 /** |
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83 * @} |
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84 */ |
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85 |
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86 |
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87 /** @defgroup BKP_Private_Macros |
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88 * @{ |
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89 */ |
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90 |
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91 /** |
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92 * @} |
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93 */ |
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94 |
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95 /** @defgroup BKP_Private_Variables |
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96 * @{ |
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97 */ |
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98 |
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99 /** |
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100 * @} |
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101 */ |
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102 |
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103 /** @defgroup BKP_Private_FunctionPrototypes |
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104 * @{ |
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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 */ |
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110 |
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111 /** @defgroup BKP_Private_Functions |
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112 * @{ |
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113 */ |
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114 |
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115 /** |
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116 * @brief Deinitializes the BKP peripheral registers to their default reset values. |
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117 * @param None |
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118 * @retval None |
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119 */ |
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120 void BKP_DeInit(void) |
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121 { |
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122 RCC_BackupResetCmd(ENABLE); |
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123 RCC_BackupResetCmd(DISABLE); |
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124 } |
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125 |
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126 /** |
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127 * @brief Configures the Tamper Pin active level. |
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128 * @param BKP_TamperPinLevel: specifies the Tamper Pin active level. |
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129 * This parameter can be one of the following values: |
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130 * @arg BKP_TamperPinLevel_High: Tamper pin active on high level |
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131 * @arg BKP_TamperPinLevel_Low: Tamper pin active on low level |
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132 * @retval None |
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133 */ |
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134 void BKP_TamperPinLevelConfig(uint16_t BKP_TamperPinLevel) |
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135 { |
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136 /* Check the parameters */ |
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137 assert_param(IS_BKP_TAMPER_PIN_LEVEL(BKP_TamperPinLevel)); |
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138 *(__IO uint32_t *) CR_TPAL_BB = BKP_TamperPinLevel; |
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139 } |
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140 |
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141 /** |
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142 * @brief Enables or disables the Tamper Pin activation. |
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143 * @param NewState: new state of the Tamper Pin activation. |
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144 * This parameter can be: ENABLE or DISABLE. |
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145 * @retval None |
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146 */ |
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147 void BKP_TamperPinCmd(FunctionalState NewState) |
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148 { |
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149 /* Check the parameters */ |
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150 assert_param(IS_FUNCTIONAL_STATE(NewState)); |
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151 *(__IO uint32_t *) CR_TPE_BB = (uint32_t)NewState; |
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152 } |
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153 |
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154 /** |
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155 * @brief Enables or disables the Tamper Pin Interrupt. |
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156 * @param NewState: new state of the Tamper Pin Interrupt. |
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157 * This parameter can be: ENABLE or DISABLE. |
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158 * @retval None |
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159 */ |
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160 void BKP_ITConfig(FunctionalState NewState) |
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161 { |
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162 /* Check the parameters */ |
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163 assert_param(IS_FUNCTIONAL_STATE(NewState)); |
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164 *(__IO uint32_t *) CSR_TPIE_BB = (uint32_t)NewState; |
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165 } |
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166 |
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167 /** |
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168 * @brief Select the RTC output source to output on the Tamper pin. |
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169 * @param BKP_RTCOutputSource: specifies the RTC output source. |
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170 * This parameter can be one of the following values: |
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171 * @arg BKP_RTCOutputSource_None: no RTC output on the Tamper pin. |
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172 * @arg BKP_RTCOutputSource_CalibClock: output the RTC clock with frequency |
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173 * divided by 64 on the Tamper pin. |
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174 * @arg BKP_RTCOutputSource_Alarm: output the RTC Alarm pulse signal on |
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175 * the Tamper pin. |
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176 * @arg BKP_RTCOutputSource_Second: output the RTC Second pulse signal on |
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177 * the Tamper pin. |
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178 * @retval None |
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179 */ |
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180 void BKP_RTCOutputConfig(uint16_t BKP_RTCOutputSource) |
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181 { |
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182 uint16_t tmpreg = 0; |
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183 /* Check the parameters */ |
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184 assert_param(IS_BKP_RTC_OUTPUT_SOURCE(BKP_RTCOutputSource)); |
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185 tmpreg = BKP->RTCCR; |
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186 /* Clear CCO, ASOE and ASOS bits */ |
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187 tmpreg &= RTCCR_MASK; |
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188 |
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189 /* Set CCO, ASOE and ASOS bits according to BKP_RTCOutputSource value */ |
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190 tmpreg |= BKP_RTCOutputSource; |
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191 /* Store the new value */ |
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192 BKP->RTCCR = tmpreg; |
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193 } |
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194 |
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195 /** |
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196 * @brief Sets RTC Clock Calibration value. |
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197 * @param CalibrationValue: specifies the RTC Clock Calibration value. |
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198 * This parameter must be a number between 0 and 0x7F. |
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199 * @retval None |
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200 */ |
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201 void BKP_SetRTCCalibrationValue(uint8_t CalibrationValue) |
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202 { |
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203 uint16_t tmpreg = 0; |
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204 /* Check the parameters */ |
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205 assert_param(IS_BKP_CALIBRATION_VALUE(CalibrationValue)); |
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206 tmpreg = BKP->RTCCR; |
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207 /* Clear CAL[6:0] bits */ |
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208 tmpreg &= RTCCR_CAL_MASK; |
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209 /* Set CAL[6:0] bits according to CalibrationValue value */ |
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210 tmpreg |= CalibrationValue; |
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211 /* Store the new value */ |
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212 BKP->RTCCR = tmpreg; |
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213 } |
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214 |
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215 /** |
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216 * @brief Writes user data to the specified Data Backup Register. |
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217 * @param BKP_DR: specifies the Data Backup Register. |
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218 * This parameter can be BKP_DRx where x:[1, 42] |
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219 * @param Data: data to write |
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220 * @retval None |
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221 */ |
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222 void BKP_WriteBackupRegister(uint16_t BKP_DR, uint16_t Data) |
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223 { |
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224 __IO uint32_t tmp = 0; |
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225 |
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226 /* Check the parameters */ |
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227 assert_param(IS_BKP_DR(BKP_DR)); |
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228 |
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229 tmp = (uint32_t)BKP_BASE; |
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230 tmp += BKP_DR; |
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231 |
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232 *(__IO uint32_t *) tmp = Data; |
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233 } |
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234 |
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235 /** |
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236 * @brief Reads data from the specified Data Backup Register. |
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237 * @param BKP_DR: specifies the Data Backup Register. |
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238 * This parameter can be BKP_DRx where x:[1, 42] |
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239 * @retval The content of the specified Data Backup Register |
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240 */ |
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241 uint16_t BKP_ReadBackupRegister(uint16_t BKP_DR) |
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242 { |
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243 __IO uint32_t tmp = 0; |
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244 |
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245 /* Check the parameters */ |
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246 assert_param(IS_BKP_DR(BKP_DR)); |
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247 |
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248 tmp = (uint32_t)BKP_BASE; |
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249 tmp += BKP_DR; |
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250 |
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251 return (*(__IO uint16_t *) tmp); |
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252 } |
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253 |
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254 /** |
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255 * @brief Checks whether the Tamper Pin Event flag is set or not. |
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256 * @param None |
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257 * @retval The new state of the Tamper Pin Event flag (SET or RESET). |
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258 */ |
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259 FlagStatus BKP_GetFlagStatus(void) |
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260 { |
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261 return (FlagStatus)(*(__IO uint32_t *) CSR_TEF_BB); |
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262 } |
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263 |
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264 /** |
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265 * @brief Clears Tamper Pin Event pending flag. |
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266 * @param None |
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267 * @retval None |
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268 */ |
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269 void BKP_ClearFlag(void) |
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270 { |
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271 /* Set CTE bit to clear Tamper Pin Event flag */ |
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272 BKP->CSR |= BKP_CSR_CTE; |
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273 } |
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274 |
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275 /** |
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276 * @brief Checks whether the Tamper Pin Interrupt has occurred or not. |
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277 * @param None |
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278 * @retval The new state of the Tamper Pin Interrupt (SET or RESET). |
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279 */ |
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280 ITStatus BKP_GetITStatus(void) |
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281 { |
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282 return (ITStatus)(*(__IO uint32_t *) CSR_TIF_BB); |
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283 } |
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284 |
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285 /** |
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286 * @brief Clears Tamper Pin Interrupt pending bit. |
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287 * @param None |
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288 * @retval None |
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289 */ |
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290 void BKP_ClearITPendingBit(void) |
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291 { |
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292 /* Set CTI bit to clear Tamper Pin Interrupt pending bit */ |
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293 BKP->CSR |= BKP_CSR_CTI; |
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294 } |
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295 |
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296 /** |
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297 * @} |
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298 */ |
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299 |
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300 /** |
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301 * @} |
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302 */ |
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303 |
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304 /** |
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305 * @} |
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306 */ |
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307 |
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308 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |