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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/PWR/STANDBY/main.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 PWR/STANDBY/main.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 08-April-2011 |
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7 * @brief Main program body. |
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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.h" |
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24 #include "stm32_eval.h" |
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25 |
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26 /** @addtogroup STM32F10x_StdPeriph_Examples |
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27 * @{ |
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28 */ |
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29 |
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30 /** @addtogroup PWR_STANDBY |
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31 * @{ |
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32 */ |
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33 |
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34 /* Private typedef -----------------------------------------------------------*/ |
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35 /* Private define ------------------------------------------------------------*/ |
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36 /* Private macro -------------------------------------------------------------*/ |
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37 /* Private variables ---------------------------------------------------------*/ |
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38 |
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39 /* Private function prototypes -----------------------------------------------*/ |
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40 void RTC_Configuration(void); |
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41 void SysTick_Configuration(void); |
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42 |
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43 /* Private functions ---------------------------------------------------------*/ |
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44 |
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45 /** |
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46 * @brief Main program. |
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47 * @param None |
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48 * @retval None |
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49 */ |
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50 int main(void) |
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51 { |
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52 /*!< At this stage the microcontroller clock setting is already configured, |
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53 this is done through SystemInit() function which is called from startup |
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54 file (startup_stm32f10x_xx.s) before to branch to application main. |
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55 To reconfigure the default setting of SystemInit() function, refer to |
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56 system_stm32f10x.c file |
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57 */ |
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58 |
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59 /* Initialize LEDs and Key Button mounted on STM3210X-EVAL board */ |
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60 STM_EVAL_LEDInit(LED1); |
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61 STM_EVAL_LEDInit(LED2); |
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62 STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI); |
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63 |
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64 /* Turn on LED1 */ |
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65 STM_EVAL_LEDOn(LED1); |
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66 |
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67 /* Enable PWR and BKP clock */ |
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68 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); |
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69 |
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70 /* Enable WKUP pin */ |
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71 PWR_WakeUpPinCmd(ENABLE); |
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72 |
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73 /* Allow access to BKP Domain */ |
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74 PWR_BackupAccessCmd(ENABLE); |
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75 |
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76 /* Configure RTC clock source and prescaler */ |
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77 RTC_Configuration(); |
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78 |
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79 /* Configure the SysTick to generate an interrupt each 250 ms */ |
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80 SysTick_Configuration(); |
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81 |
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82 while (1) |
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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 /** |
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88 * @brief Configures RTC clock source and prescaler. |
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89 * @param None |
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90 * @retval None |
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91 */ |
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92 void RTC_Configuration(void) |
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93 { |
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94 /* Check if the StandBy flag is set */ |
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95 if(PWR_GetFlagStatus(PWR_FLAG_SB) != RESET) |
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96 {/* System resumed from STANDBY mode */ |
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97 |
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98 /* Turn on LED2 */ |
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99 STM_EVAL_LEDOn(LED2); |
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100 |
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101 /* Clear StandBy flag */ |
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102 PWR_ClearFlag(PWR_FLAG_SB); |
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103 |
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104 /* Wait for RTC APB registers synchronisation */ |
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105 RTC_WaitForSynchro(); |
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106 /* No need to configure the RTC as the RTC configuration(clock source, enable, |
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107 prescaler,...) is kept after wake-up from STANDBY */ |
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108 } |
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109 else |
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110 {/* StandBy flag is not set */ |
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111 |
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112 /* RTC clock source configuration ----------------------------------------*/ |
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113 /* Reset Backup Domain */ |
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114 BKP_DeInit(); |
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115 |
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116 /* Enable LSE OSC */ |
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117 RCC_LSEConfig(RCC_LSE_ON); |
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118 /* Wait till LSE is ready */ |
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119 while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) |
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120 { |
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121 } |
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122 |
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123 /* Select the RTC Clock Source */ |
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124 RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); |
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125 |
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126 /* Enable the RTC Clock */ |
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127 RCC_RTCCLKCmd(ENABLE); |
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128 |
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129 /* RTC configuration -----------------------------------------------------*/ |
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130 /* Wait for RTC APB registers synchronisation */ |
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131 RTC_WaitForSynchro(); |
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132 |
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133 /* Set the RTC time base to 1s */ |
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134 RTC_SetPrescaler(32767); |
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135 /* Wait until last write operation on RTC registers has finished */ |
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136 RTC_WaitForLastTask(); |
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137 } |
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138 } |
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139 |
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140 /** |
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141 * @brief Configures the SysTick to generate an interrupt each 250 ms. |
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142 * @param None |
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143 * @retval None |
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144 */ |
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145 void SysTick_Configuration(void) |
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146 { |
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147 /* SysTick interrupt each 250 ms with SysTick Clock equal to (HCLK/8) */ |
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148 if (SysTick_Config((SystemCoreClock/8) / 4)) |
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149 { |
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150 /* Capture error */ |
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151 while (1); |
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152 } |
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153 |
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154 /* Select AHB clock(HCLK) divided by 8 as SysTick clock source */ |
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155 SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8); |
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156 |
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157 /* Set SysTick Preemption Priority to 1 */ |
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158 NVIC_SetPriority(SysTick_IRQn, 0x04); |
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159 } |
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160 |
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161 #ifdef USE_FULL_ASSERT |
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162 |
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163 /** |
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164 * @brief Reports the name of the source file and the source line number |
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165 * where the assert_param error has occurred. |
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166 * @param file: pointer to the source file name |
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167 * @param line: assert_param error line source number |
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168 * @retval None |
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169 */ |
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170 void assert_failed(uint8_t* file, uint32_t line) |
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171 { |
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172 /* User can add his own implementation to report the file name and line number, |
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173 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
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174 |
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175 /* Infinite loop */ |
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176 while (1) |
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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 #endif |
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182 |
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183 /** |
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184 * @} |
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185 */ |
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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 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |