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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/HyperTerminal_HwFlowControl/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 USART/HyperTerminal_HwFlowControl/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 "platform_config.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 USART_HyperTerminal_HwFlowControl
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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 #define TxBufferSize (countof(TxBuffer) - 1)
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37 #define RxBufferSize 0xFF
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38
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39 /* Private macro -------------------------------------------------------------*/
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40 #define countof(a) (sizeof(a) / sizeof(*(a)))
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41
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42 /* Private variables ---------------------------------------------------------*/
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43 USART_InitTypeDef USART_InitStructure;
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44 uint8_t TxBuffer[] = "\n\rUSART Hyperterminal Hardware Flow Control Example: USART - \
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45 Hyperterminal communication using hardware flow control\n\r";
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46 uint8_t RxBuffer[RxBufferSize];
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47 uint8_t NbrOfDataToTransfer = TxBufferSize;
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48 uint8_t TxCounter = 0;
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49 uint8_t RxCounter = 0;
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50
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51 /* Private function prototypes -----------------------------------------------*/
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52 void RCC_Configuration(void);
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53 void GPIO_Configuration(void);
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54
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55 /* Private functions ---------------------------------------------------------*/
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56
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57 /**
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58 * @brief Main program
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59 * @param None
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60 * @retval None
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61 */
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62 int main(void)
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63 {
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64 /*!< At this stage the microcontroller clock setting is already configured,
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65 this is done through SystemInit() function which is called from startup
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66 file (startup_stm32f10x_xx.s) before to branch to application main.
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67 To reconfigure the default setting of SystemInit() function, refer to
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68 system_stm32f10x.c file
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69 */
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70
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71 /* System Clocks Configuration */
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72 RCC_Configuration();
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73
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74 /* Configure the GPIO ports */
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75 GPIO_Configuration();
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76
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77 /* USART2 configuration ------------------------------------------------------*/
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78 /* USART2 configured as follow:
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79 - BaudRate = 115200 baud
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80 - Word Length = 8 Bits
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81 - One Stop Bit
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82 - No parity
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83 - Hardware flow control enabled (RTS and CTS signals)
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84 - Receive and transmit enabled
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85 */
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86 USART_InitStructure.USART_BaudRate = 115200;
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87 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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88 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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89 USART_InitStructure.USART_Parity = USART_Parity_No ;
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90 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_RTS_CTS;
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91 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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92
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93 USART_Init(USART2, &USART_InitStructure);
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94 /* Enable the USART2 */
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95 USART_Cmd(USART2, ENABLE);
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96
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97 /* Communication hyperterminal-USART2 using hardware flow control -------------*/
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98 /* Send a buffer from USART to hyperterminal */
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99 while(NbrOfDataToTransfer--)
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100 {
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101 USART_SendData(USART2, TxBuffer[TxCounter++]);
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102 while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);
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103 }
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104
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105 /* Receive a string (Max RxBufferSize bytes) from the Hyperterminal ended by '\r' (Enter key) */
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106 do
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107 {
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108 if((USART_GetFlagStatus(USART2, USART_FLAG_RXNE) != RESET)&&(RxCounter < RxBufferSize))
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109 {
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110 RxBuffer[RxCounter] = USART_ReceiveData(USART2);
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111 USART_SendData(USART2, RxBuffer[RxCounter++]);
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112 }
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113
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114 }while((RxBuffer[RxCounter - 1] != '\r')&&(RxCounter != RxBufferSize));
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115
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116 while (1)
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117 {
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118 }
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119 }
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120
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121 /**
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122 * @brief Configures the different system clocks.
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123 * @param None
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124 * @retval None
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125 */
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126 void RCC_Configuration(void)
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127 {
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128 /* Enable GPIOx and AFIO clocks */
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129 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOx | RCC_APB2Periph_AFIO, ENABLE);
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130
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131 /* Enable USART2 clocks */
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132 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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133 }
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134
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135 /**
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136 * @brief Configures the different GPIO ports.
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137 * @param None
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138 * @retval None
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139 */
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140 void GPIO_Configuration(void)
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141 {
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142 GPIO_InitTypeDef GPIO_InitStructure;
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143
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144 #if defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL)
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145 /* Enable the USART2 Pins Software Remapping */
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146 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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147 #endif
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148
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149 /* Configure USART2 RTS and USART2 Tx as alternate function push-pull */
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150 GPIO_InitStructure.GPIO_Pin = GPIO_RTSPin | GPIO_TxPin;
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151 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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152 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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153 GPIO_Init(GPIOx, &GPIO_InitStructure);
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154
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155 /* Configure USART2 CTS and USART2 Rx as input floating */
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156 GPIO_InitStructure.GPIO_Pin = GPIO_CTSPin | GPIO_RxPin;
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157 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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158 GPIO_Init(GPIOx, &GPIO_InitStructure);
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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****/