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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/CEC/DataExchangeInterrupt/main.c @ 85:18b154c447bb

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Add note about 1-wire wiring
author Daniel O'Connor <darius@dons.net.au>
date Thu, 12 Mar 2015 23:22:11 +1030
parents c59513fd84fb
children
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1 /**
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2 ******************************************************************************
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3 * @file CEC/DataExchangeInterrupt/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 CEC_DataExchangeInterrupt
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31 * @{
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32 */
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33
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34
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35 /* Private typedef -----------------------------------------------------------*/
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36 typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
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37
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38 /* Private define ------------------------------------------------------------*/
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39 /* Private macro -------------------------------------------------------------*/
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40 /* Private variables ---------------------------------------------------------*/
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41 CEC_InitTypeDef CEC_InitStructure;
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42
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43 uint8_t ByteNumber = 10;
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44 volatile TestStatus TransferStatus = FAILED;
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45 extern uint8_t TransmitBuffer[10];
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46 extern uint8_t ReceiveBuffer[10];
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47 extern __IO uint8_t ReceivedFrame;
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48
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49 /* Private function prototypes -----------------------------------------------*/
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50 void RCC_Configuration(void);
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51 void NVIC_Configuration(void);
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52 void GPIO_Configuration(void);
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53 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
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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 /* RCC configuration */
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72 RCC_Configuration();
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73
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74 /* NVIC configuration */
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75 NVIC_Configuration();
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76
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77 /* GPIO configuration */
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78 GPIO_Configuration();
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79
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80 /* Configure the CEC peripheral */
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81 CEC_InitStructure.CEC_BitTimingMode = CEC_BitTimingStdMode;
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82 CEC_InitStructure.CEC_BitPeriodMode = CEC_BitPeriodStdMode;
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83 CEC_Init(&CEC_InitStructure);
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84
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85 /* Set Prescaler value for APB1 clock PCLK1 = 24MHz */
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86 CEC_SetPrescaler(0x4AF);
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87
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88 /* Set the CEC initiator address */
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89 CEC_OwnAddressConfig(MY_DEVICE_ADDRESS);
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90
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91 /* Activate CEC interrupts associated to the set of RBTF,RERR, TBTF, TERR flags */
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92 CEC_ITConfig(ENABLE);
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93
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94 /* Enable CEC */
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95 CEC_Cmd(ENABLE);
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96
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97 /* If a frame has been received */
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98 while(ReceivedFrame == 0)
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99 {
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100 }
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101
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102 /* Check the received data with the send ones */
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103 TransferStatus = Buffercmp(TransmitBuffer, ReceiveBuffer, ByteNumber);
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104 /* TransferStatus = PASSED, if the data transmitted from CEC Device1 and
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105 received by CEC Device2 are the same */
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106 /* TransferStatus = FAILED, if the data transmitted from CEC Device1 and
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107 received by CEC Device2 are different */
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108
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109 if (TransferStatus == PASSED)
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110 {
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111 /* OK */
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112 /* Turn on LED1 */
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113 STM_EVAL_LEDOn(LED1);
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114 }
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115 else
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116 {
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117 /* KO */
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118 /* Turn on LED2 */
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119 STM_EVAL_LEDOn(LED2);
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120 }
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121 while(1)
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122 {
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123 }
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124 }
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125
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126 /**
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127 * @brief Configures the different system clocks.
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128 * @param None
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129 * @retval None
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130 */
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131 void RCC_Configuration(void)
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132 {
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133 /* Enable CEC clock */
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134 RCC_APB1PeriphClockCmd(RCC_APB1Periph_CEC, ENABLE);
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135
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136 /* Initialize LEDs and Key Button available on STM32F100B-EVAL board ***/
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137 /* Configure LED1, LED2, LED3 and LED4 */
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138 STM_EVAL_LEDInit(LED1);
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139 STM_EVAL_LEDInit(LED2);
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140 STM_EVAL_LEDInit(LED3);
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141 STM_EVAL_LEDInit(LED4);
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142
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143 /* Configure the Key Push button and its associated EXTI Line */
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144 STM_EVAL_PBInit(Button_KEY, Mode_EXTI);
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145 }
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146
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147 /**
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148 * @brief Configures the different NVIC interrupts.
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149 * @param None
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150 * @retval None
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151 */
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152 void NVIC_Configuration(void)
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153 {
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154 NVIC_InitTypeDef NVIC_InitStructure;
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155
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156 /* Configure two bits for preemption priority */
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157 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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158
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159 /* Enable the CEC global Interrupt (with higher priority) */
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160 NVIC_InitStructure.NVIC_IRQChannel = CEC_IRQn;
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161 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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162 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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163 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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164 NVIC_Init(&NVIC_InitStructure);
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165 }
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166
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167 /**
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168 * @brief Configures the different GPIO ports.
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169 * @param None
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170 * @retval None
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171 */
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172 void GPIO_Configuration(void)
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173 {
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174 GPIO_InitTypeDef GPIO_InitStructure;
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175
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176 /* Enable GPIOB clocks */
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177 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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178
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179 /* Configure GPIOB Pin 8 (CEC line) as Output open drain */
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180 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
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181 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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182 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
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183 GPIO_Init(GPIOB, &GPIO_InitStructure);
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184 }
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185
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186 /**
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187 * @brief Compares two buffers.
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188 * @param pBuffer1, pBuffer2: buffers to be compared.
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189 * @param BufferLength: buffer's length
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190 * @retval PASSED: pBuffer1 identical to pBuffer2
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191 * FAILED: pBuffer1 differs from pBuffer2
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192 */
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193 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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194 {
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195 while(BufferLength--)
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196 {
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197 if(*pBuffer1 != *pBuffer2)
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198 {
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199 return FAILED;
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200 }
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201
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202 pBuffer1++;
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203 pBuffer2++;
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204 }
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205
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206 return PASSED;
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207 }
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208
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209 #ifdef USE_FULL_ASSERT
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210
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211 /**
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212 * @brief Reports the name of the source file and the source line number
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213 * where the assert_param error has occurred.
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214 * @param file: pointer to the source file name
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215 * @param line: assert_param error line source number
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216 * @retval None
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217 */
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218 void assert_failed(uint8_t* file, uint32_t line)
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219 {
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220 /* User can add his own implementation to report the file name and line number,
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221 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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222
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223 /* Infinite loop */
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224 while (1)
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225 {
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226 }
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227 }
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228
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229 #endif
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230
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231 /**
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232 * @}
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233 */
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234
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235 /**
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236 * @}
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237 */
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238
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239 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/