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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/HalfDuplex/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/HalfDuplex/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_HalfDuplex
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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 TxBufferSize1 (countof(TxBuffer1) - 1)
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39 #define TxBufferSize2 (countof(TxBuffer2) - 1)
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40
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41 /* Private macro -------------------------------------------------------------*/
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42 #define countof(a) (sizeof(a) / sizeof(*(a)))
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43
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44 /* Private variables ---------------------------------------------------------*/
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45 USART_InitTypeDef USART_InitStructure;
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46 uint8_t TxBuffer1[] = "USART Half Duplex: USARTy -> USARTz using HalfDuplex mode";
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47 uint8_t TxBuffer2[] = "USART Half Duplex: USARTz -> USARTy using HalfDuplex mode";
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48 uint8_t RxBuffer1[TxBufferSize2];
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49 uint8_t RxBuffer2[TxBufferSize1];
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50 uint32_t NbrOfDataToRead1 = TxBufferSize2;
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51 uint32_t NbrOfDataToRead2 = TxBufferSize1;
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52 uint8_t TxCounter1 = 0, RxCounter1 = 0;
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53 uint8_t TxCounter2 = 0, RxCounter2 = 0;
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54 volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
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55
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56 /* Private function prototypes -----------------------------------------------*/
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57 void RCC_Configuration(void);
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58 void GPIO_Configuration(void);
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59 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
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60
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61 /* Private functions ---------------------------------------------------------*/
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62
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63 /**
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64 * @brief Main program
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65 * @param None
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66 * @retval None
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67 */
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68 int main(void)
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69 {
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70 /*!< At this stage the microcontroller clock setting is already configured,
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71 this is done through SystemInit() function which is called from startup
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72 file (startup_stm32f10x_xx.s) before to branch to application main.
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73 To reconfigure the default setting of SystemInit() function, refer to
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74 system_stm32f10x.c file
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75 */
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76
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77 /* System Clocks Configuration */
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78 RCC_Configuration();
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79
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80 /* Configure the GPIO ports */
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81 GPIO_Configuration();
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82
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83 /* USARTy and USARTz configuration -------------------------------------------*/
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84 /* USARTy and USARTz configured as follow:
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85 - BaudRate = 230400 baud
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86 - Word Length = 8 Bits
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87 - One Stop Bit
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88 - No parity
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89 - Hardware flow control disabled (RTS and CTS signals)
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90 - Receive and transmit enabled
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91
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92 */
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93 USART_InitStructure.USART_BaudRate = 230400;
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94 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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95 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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96 USART_InitStructure.USART_Parity = USART_Parity_No;
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97 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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98 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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99
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100 /* Configure USARTy */
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101 USART_Init(USARTy, &USART_InitStructure);
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102 /* Configure USARTz */
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103 USART_Init(USARTz, &USART_InitStructure);
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104
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105 /* Enable the USARTy */
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106 USART_Cmd(USARTy, ENABLE);
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107 /* Enable the USARTz */
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108 USART_Cmd(USARTz, ENABLE);
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109
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110 /* Enable USARTy Half Duplex Mode*/
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111 USART_HalfDuplexCmd(USARTy, ENABLE);
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112 /* Enable USARTz Half Duplex Mode*/
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113 USART_HalfDuplexCmd(USARTz, ENABLE);
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114
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115 while(NbrOfDataToRead2--)
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116 {
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117 /* Wait until end of transmit */
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118 while(USART_GetFlagStatus(USARTy, USART_FLAG_TXE) == RESET)
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119 {
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120 }
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121 /* Write one byte in the USARTy Transmit Data Register */
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122 USART_SendData(USARTy, TxBuffer1[TxCounter1++]);
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123
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124 /* Wait the byte is entirely received by USARTz */
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125 while(USART_GetFlagStatus(USARTz, USART_FLAG_RXNE) == RESET)
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126 {
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127 }
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128 /* Store the received byte in the RxBuffer2 */
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129 RxBuffer2[RxCounter2++] = USART_ReceiveData(USARTz);
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130 }
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131
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132 /* Clear the USARTy Data Register */
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133 USART_ReceiveData(USARTy);
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134
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135 while(NbrOfDataToRead1--)
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136 {
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137 /* Wait until end of transmit */
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138 while(USART_GetFlagStatus(USARTz, USART_FLAG_TXE)== RESET)
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139 {
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140 }
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141 /* Write one byte in the USARTz Transmit Data Register */
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142 USART_SendData(USARTz, TxBuffer2[TxCounter2++]);
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143
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144 /* Wait the byte is entirely received by USARTy */
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145 while(USART_GetFlagStatus(USARTy,USART_FLAG_RXNE) == RESET)
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146 {
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147 }
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148 /* Store the received byte in the RxBuffer1 */
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149 RxBuffer1[RxCounter1++] = USART_ReceiveData(USARTy);
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150 }
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151
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152 /* Check the received data with the send ones */
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153 TransferStatus1 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
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154 /* TransferStatus = PASSED, if the data transmitted from USARTy and
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155 received by USARTz are the same */
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156 /* TransferStatus = FAILED, if the data transmitted from USARTy and
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157 received by USARTz are different */
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158 TransferStatus2 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
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159 /* TransferStatus = PASSED, if the data transmitted from USARTz and
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160 received by USARTy are the same */
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161 /* TransferStatus = FAILED, if the data transmitted from USARTz and
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162 received by USARTy are different */
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163
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164 while (1)
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165 {
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166 }
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167 }
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168
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169 /**
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170 * @brief Configures the different system clocks.
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171 * @param None
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172 * @retval None
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173 */
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174 void RCC_Configuration(void)
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175 {
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176 /* Enable GPIO clock */
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177 RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
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178
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179 #ifndef USE_STM3210C_EVAL
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180 /* Enable USARTy Clock */
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181 RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
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182 #else
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183 /* Enable USARTy Clock */
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184 RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE);
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185 #endif
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186 /* Enable USARTz Clock */
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187 RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE);
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188 }
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189
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190 /**
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191 * @brief Configures the different GPIO ports.
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192 * @param None
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193 * @retval None
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194 */
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195 void GPIO_Configuration(void)
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196 {
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197 GPIO_InitTypeDef GPIO_InitStructure;
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198
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199 #ifdef USE_STM3210C_EVAL
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200 /* Enable the USART3 Pins Software Remapping */
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201 GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
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202
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203 /* Enable the USART2 Pins Software Remapping */
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204 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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205 #elif defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL)
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206 /* Enable the USART2 Pins Software Remapping */
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207 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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208 #endif
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209
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210 /* Configure USARTy Tx as alternate function open-drain */
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211 GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
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212 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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213 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
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214 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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215
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216 /* Configure USARTz Tx as alternate function open-drain */
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217 GPIO_InitStructure.GPIO_Pin = USARTz_TxPin;
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218 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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219 }
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220
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221 /**
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222 * @brief Compares two buffers.
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223 * @param pBuffer1, pBuffer2: buffers to be compared.
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224 * @param BufferLength: buffer's length
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225 * @retval PASSED: pBuffer1 identical to pBuffer2
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226 * FAILED: pBuffer1 differs from pBuffer2
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227 */
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228 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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229 {
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230 while(BufferLength--)
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231 {
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232 if(*pBuffer1 != *pBuffer2)
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233 {
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234 return FAILED;
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235 }
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236
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237 pBuffer1++;
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238 pBuffer2++;
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239 }
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240
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241 return PASSED;
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242 }
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243
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244 #ifdef USE_FULL_ASSERT
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245
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246 /**
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247 * @brief Reports the name of the source file and the source line number
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248 * where the assert_param error has occurred.
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249 * @param file: pointer to the source file name
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250 * @param line: assert_param error line source number
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251 * @retval None
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252 */
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253 void assert_failed(uint8_t* file, uint32_t line)
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254 {
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255 /* User can add his own implementation to report the file name and line number,
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256 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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257
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258 /* Infinite loop */
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259 while (1)
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260 {
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261 }
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262 }
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263
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264 #endif
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265
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266 /**
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267 * @}
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268 */
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269
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270 /**
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271 * @}
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272 */
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273
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274 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/