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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DAC/TwoChannels_TriangleWave/main.c @ 8:58d76cf522ff

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Split out code into separate files.
author Daniel O'Connor <darius@dons.net.au>
date Sat, 04 Feb 2012 13:29:31 +1030
parents c59513fd84fb
children
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1 /**
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2 ******************************************************************************
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3 * @file DAC/TwoChannels_TriangleWave/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
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25 /** @addtogroup STM32F10x_StdPeriph_Examples
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26 * @{
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27 */
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28
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29 /** @addtogroup DAC_TwoChannels_TriangleWave
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30 * @{
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31 */
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32
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33 /* Private typedef -----------------------------------------------------------*/
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34 /* Private define ------------------------------------------------------------*/
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35 /* Init Structure definition */
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36 DAC_InitTypeDef DAC_InitStructure;
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37 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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38
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39 /* Private macro -------------------------------------------------------------*/
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40 /* Private variables ---------------------------------------------------------*/
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41 /* Private function prototypes -----------------------------------------------*/
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42 void RCC_Configuration(void);
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43 void GPIO_Configuration(void);
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44 void Delay(__IO uint32_t nCount);
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45
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46 /* Private functions ---------------------------------------------------------*/
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47
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48 /**
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49 * @brief Main program.
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50 * @param None
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51 * @retval None
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52 */
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53 int main(void)
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54 {
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55 /*!< At this stage the microcontroller clock setting is already configured,
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56 this is done through SystemInit() function which is called from startup
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57 file (startup_stm32f10x_xx.s) before to branch to application main.
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58 To reconfigure the default setting of SystemInit() function, refer to
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59 system_stm32f10x.c file
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60 */
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61
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62 /* System Clocks Configuration */
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63 RCC_Configuration();
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64
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65 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
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66 connected to the DAC converter. In order to avoid parasitic consumption,
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67 the GPIO pin should be configured in analog */
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68 GPIO_Configuration();
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69
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70 /* TIM2 Configuration */
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71 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
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72 TIM_TimeBaseStructure.TIM_Period = 0xF;
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73 TIM_TimeBaseStructure.TIM_Prescaler = 0xF;
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74 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
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75 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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76 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
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77
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78 /* TIM2 TRGO selection */
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79 TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);
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80
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81 /* DAC channel1 Configuration */
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82 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;
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83 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Triangle;
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84 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_2047;
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85 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
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86 DAC_Init(DAC_Channel_1, &DAC_InitStructure);
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87
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88 /* DAC channel2 Configuration */
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89 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1023;
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90 DAC_Init(DAC_Channel_2, &DAC_InitStructure);
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91
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92 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is
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93 automatically connected to the DAC converter. */
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94 DAC_Cmd(DAC_Channel_1, ENABLE);
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95
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96 /* Enable DAC Channel2: Once the DAC channel2 is enabled, PA.05 is
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97 automatically connected to the DAC converter. */
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98 DAC_Cmd(DAC_Channel_2, ENABLE);
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99
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100 /* Set DAC dual channel DHR12RD register */
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101 DAC_SetDualChannelData(DAC_Align_12b_R, 0x100, 0x100);
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102
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103 /* TIM2 enable counter */
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104 TIM_Cmd(TIM2, ENABLE);
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105
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106 while (1)
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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 /**
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112 * @brief Configures the different system clocks.
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113 * @param None
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114 * @retval None
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115 */
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116 void RCC_Configuration(void)
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117 {
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118 /* Enable peripheral clocks ------------------------------------------------*/
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119 /* GPIOA Periph clock enable */
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120 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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121 /* DAC Periph clock enable */
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122 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
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123 /* TIM2 Periph clock enable */
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124 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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125 }
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126
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127 /**
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128 * @brief Configures the different GPIO ports.
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129 * @param None
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130 * @retval None
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131 */
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132 void GPIO_Configuration(void)
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133 {
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134 GPIO_InitTypeDef GPIO_InitStructure;
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135
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136 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
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137 connected to the DAC converter. In order to avoid parasitic consumption,
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138 the GPIO pin should be configured in analog */
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139 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
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140 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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141 GPIO_Init(GPIOA, &GPIO_InitStructure);
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142 }
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143
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144 /**
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145 * @brief Inserts a delay time.
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146 * @param nCount: specifies the delay time length.
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147 * @retval None
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148 */
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149 void Delay(__IO uint32_t nCount)
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150 {
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151 for(; nCount != 0; nCount--);
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152 }
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153
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154 #ifdef USE_FULL_ASSERT
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155
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156 /**
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157 * @brief Reports the name of the source file and the source line number
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158 * where the assert_param error has occurred.
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159 * @param file: pointer to the source file name
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160 * @param line: assert_param error line source number
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161 * @retval None
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162 */
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163 void assert_failed(uint8_t* file, uint32_t line)
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164 {
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165 /* User can add his own implementation to report the file name and line number,
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166 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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167
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168 /* Infinite loop */
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169 while (1)
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170 {
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171 }
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172 }
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173
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174 #endif
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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 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/