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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/Polling/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/Polling/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_Polling
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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 typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
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36
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37 /* Private define ------------------------------------------------------------*/
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38 #define TxBufferSize (countof(TxBuffer))
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39
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40 /* Private macro -------------------------------------------------------------*/
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41 #define countof(a) (sizeof(a) / sizeof(*(a)))
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42
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43 /* Private variables ---------------------------------------------------------*/
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44 USART_InitTypeDef USART_InitStructure;
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45 uint8_t TxBuffer[] = "Buffer Send from USARTy to USARTz using Flags";
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46 uint8_t RxBuffer[TxBufferSize];
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47 __IO uint8_t TxCounter = 0, RxCounter = 0;
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48 volatile TestStatus TransferStatus = FAILED;
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49
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50 /* Private function prototypes -----------------------------------------------*/
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51 void RCC_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 __IO uint8_t index = 0;
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55
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56 /* Private functions ---------------------------------------------------------*/
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57
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58 /**
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59 * @brief Main program
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60 * @param None
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61 * @retval None
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62 */
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63 int main(void)
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64 {
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65 /*!< At this stage the microcontroller clock setting is already configured,
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66 this is done through SystemInit() function which is called from startup
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67 file (startup_stm32f10x_xx.s) before to branch to application main.
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68 To reconfigure the default setting of SystemInit() function, refer to
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69 system_stm32f10x.c file
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70 */
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71
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72 /* System Clocks Configuration */
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73 RCC_Configuration();
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74
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75 /* Configure the GPIO ports */
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76 GPIO_Configuration();
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77
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78 /* USARTy and USARTz configuration ------------------------------------------------------*/
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79 /* USARTy and USARTz configured as follow:
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80 - BaudRate = 230400 baud
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81 - Word Length = 8 Bits
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82 - One Stop Bit
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83 - Even parity
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84 - Hardware flow control disabled (RTS and CTS signals)
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85 - Receive and transmit enabled
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86 */
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87 USART_InitStructure.USART_BaudRate = 230400;
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88 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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89 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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90 USART_InitStructure.USART_Parity = USART_Parity_Even;
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91 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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92 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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93
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94 /* Configure USARTy */
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95 USART_Init(USARTy, &USART_InitStructure);
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96 /* Configure USARTz */
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97 USART_Init(USARTz, &USART_InitStructure);
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98
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99 /* Enable the USARTy */
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100 USART_Cmd(USARTy, ENABLE);
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101
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102 /* Enable the USARTz */
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103 USART_Cmd(USARTz, ENABLE);
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104
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105 while(TxCounter < TxBufferSize)
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106 {
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107 /* Send one byte from USARTy to USARTz */
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108 USART_SendData(USARTy, TxBuffer[TxCounter++]);
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109
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110 /* Loop until USARTy DR register is empty */
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111 while(USART_GetFlagStatus(USARTy, USART_FLAG_TXE) == RESET)
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112 {
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113 }
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114
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115 /* Loop until the USARTz Receive Data Register is not empty */
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116 while(USART_GetFlagStatus(USARTz, USART_FLAG_RXNE) == RESET)
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117 {
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118 }
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119
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120 /* Store the received byte in RxBuffer */
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121 RxBuffer[RxCounter++] = (USART_ReceiveData(USARTz) & 0x7F);
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122
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123 }
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124 /* Check the received data with the send ones */
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125 TransferStatus = Buffercmp(TxBuffer, RxBuffer, TxBufferSize);
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126 /* TransferStatus = PASSED, if the data transmitted from USARTy and
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127 received by USARTz are the same */
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128 /* TransferStatus = FAILED, if the data transmitted from USARTy and
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129 received by USARTz are different */
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130
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131 while (1)
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132 {
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133 }
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134 }
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135
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136 /**
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137 * @brief Configures the different system clocks.
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138 * @param None
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139 * @retval None
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140 */
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141 void RCC_Configuration(void)
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142 {
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143 /* Enable GPIO clock */
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144 RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
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145
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146 #ifndef USE_STM3210C_EVAL
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147 /* Enable USARTy Clock */
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148 RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
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149 #else
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150 /* Enable USARTy Clock */
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151 RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE);
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152 #endif
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153 /* Enable USARTz Clock */
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154 RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE);
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155 }
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156
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157 /**
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158 * @brief Configures the different GPIO ports.
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159 * @param None
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160 * @retval None
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161 */
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162 void GPIO_Configuration(void)
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163 {
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164 GPIO_InitTypeDef GPIO_InitStructure;
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165
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166 #ifdef USE_STM3210C_EVAL
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167 /* Enable the USART3 Pins Software Remapping */
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168 GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
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169
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170 /* Enable the USART2 Pins Software Remapping */
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171 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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172 #elif defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL)
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173 /* Enable the USART2 Pins Software Remapping */
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174 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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175 #endif
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176
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177 /* Configure USARTy Rx as input floating */
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178 GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
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179 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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180 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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181
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182 /* Configure USARTz Rx as input floating */
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183 GPIO_InitStructure.GPIO_Pin = USARTz_RxPin;
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184 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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185
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186 /* Configure USARTy Tx as alternate function push-pull */
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187 GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
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188 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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189 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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190 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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191
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192 /* Configure USARTz Tx as alternate function push-pull */
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193 GPIO_InitStructure.GPIO_Pin = USARTz_TxPin;
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194 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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195 }
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196
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197 /**
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198 * @brief Compares two buffers.
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199 * @param pBuffer1, pBuffer2: buffers to be compared.
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200 * @param BufferLength: buffer's length
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201 * @retval PASSED: pBuffer1 identical to pBuffer2
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202 * FAILED: pBuffer1 differs from pBuffer2
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203 */
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204 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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205 {
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206 while(BufferLength--)
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207 {
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208 if(*pBuffer1 != *pBuffer2)
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209 {
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210 return FAILED;
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211 }
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212
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213 pBuffer1++;
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214 pBuffer2++;
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215 }
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216
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217 return PASSED;
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218 }
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219
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220 #ifdef USE_FULL_ASSERT
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221
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222 /**
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223 * @brief Reports the name of the source file and the source line number
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224 * where the assert_param error has occurred.
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225 * @param file: pointer to the source file name
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226 * @param line: assert_param error line source number
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227 * @retval None
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228 */
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229 void assert_failed(uint8_t* file, uint32_t line)
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230 {
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231 /* User can add his own implementation to report the file name and line number,
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232 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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233
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234 /* Infinite loop */
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235 while (1)
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236 {
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237 }
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238 }
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239
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240 #endif
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241
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242 /**
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243 * @}
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244 */
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245
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246 /**
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247 * @}
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248 */
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249
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250 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/