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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/Polling/main.c @ 8:58d76cf522ff
Split out code into separate files.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Sat, 04 Feb 2012 13:29:31 +1030 |
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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>© 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****/ |