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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/PWR/STANDBY/main.c @ 55:b21db2b47a27

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Enable DMA mode by initing DMA channel and enabling IRQ handler.
author Daniel O'Connor <darius@dons.net.au>
date Sun, 07 Apr 2013 22:34:05 +0930
parents c59513fd84fb
children
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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>&copy; 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****/