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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/DMA_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/DMA_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_DMA_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 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 DMA Polling: USARTy -> USARTz using DMA";
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47 uint8_t TxBuffer2[] = "USART DMA Polling: USARTz -> USARTy using DMA";
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48 uint8_t RxBuffer1[TxBufferSize2];
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49 uint8_t RxBuffer2[TxBufferSize1];
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50 volatile TestStatus TransferStatus1 = FAILED;
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51 volatile TestStatus TransferStatus2 = FAILED;
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52
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53 /* Private function prototypes -----------------------------------------------*/
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54 void RCC_Configuration(void);
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55 void GPIO_Configuration(void);
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56 void DMA_Configuration(void);
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57 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
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58
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59 /* Private functions ---------------------------------------------------------*/
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60
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61 /**
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62 * @brief Main program
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63 * @param None
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64 * @retval None
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65 */
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66 int main(void)
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67 {
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68 /*!< At this stage the microcontroller clock setting is already configured,
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69 this is done through SystemInit() function which is called from startup
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70 file (startup_stm32f10x_xx.s) before to branch to application main.
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71 To reconfigure the default setting of SystemInit() function, refer to
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72 system_stm32f10x.c file
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73 */
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74
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75 /* System Clocks Configuration */
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76 RCC_Configuration();
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77
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78 /* Configure the GPIO ports */
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79 GPIO_Configuration();
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80
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81 /* Configure the DMA */
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82 DMA_Configuration();
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83
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84 /* USARTy and USARTz configuration ------------------------------------------------------*/
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85 /* USARTy and USARTz configured as follow:
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86 - BaudRate = 230400 baud
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87 - Word Length = 8 Bits
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88 - One Stop Bit
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89 - No parity
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90 - Hardware flow control disabled (RTS and CTS signals)
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91 - Receive and transmit enabled
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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 USARTy DMA Rx and TX request */
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106 USART_DMACmd(USARTy, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE);
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107 /* Enable USARTz DMA Rx and TX request */
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108 USART_DMACmd(USARTz, USART_DMAReq_Rx | USART_DMAReq_Tx, ENABLE);
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109
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110 /* Enable USARTy TX DMA1 Channel */
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111 DMA_Cmd(USARTy_Tx_DMA_Channel, ENABLE);
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112 /* Enable USARTy RX DMA1 Channel */
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113 DMA_Cmd(USARTy_Rx_DMA_Channel, ENABLE);
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114
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115 /* Enable USARTz TX DMA1 Channel */
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116 DMA_Cmd(USARTz_Tx_DMA_Channel, ENABLE);
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117 /* Enable USARTz RX DMA1 Channel */
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118 DMA_Cmd(USARTz_Rx_DMA_Channel, ENABLE);
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119
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120 /* Enable the USARTy */
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121 USART_Cmd(USARTy, ENABLE);
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122 /* Enable the USARTz */
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123 USART_Cmd(USARTz, ENABLE);
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124
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125 /* Wait until USARTy TX DMA1 Channel Transfer Complete */
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126 while (DMA_GetFlagStatus(USARTy_Tx_DMA_FLAG) == RESET)
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127 {
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128 }
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129 /* Wait until USARTy RX DMA1 Channel Transfer Complete */
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130 while (DMA_GetFlagStatus(USARTy_Rx_DMA_FLAG) == RESET)
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131 {
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132 }
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133
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134 /* Wait until USARTz TX DMA1 Channel Transfer Complete */
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135 while (DMA_GetFlagStatus(USARTz_Tx_DMA_FLAG) == RESET)
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136 {
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137 }
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138 /* Wait until USARTz RX DMA1 Channel Transfer Complete */
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139 while (DMA_GetFlagStatus(USARTz_Rx_DMA_FLAG) == RESET)
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140 {
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141 }
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142
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143 /* Check the received data with the send ones */
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144 TransferStatus1 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
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145 /* TransferStatus1 = PASSED, if the data transmitted from USARTz and
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146 received by USARTy are the same */
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147 /* TransferStatus1 = FAILED, if the data transmitted from USARTz and
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148 received by USARTy are different */
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149 TransferStatus2 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
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150 /* TransferStatus2 = PASSED, if the data transmitted from USARTy and
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151 received by USARTz are the same */
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152 /* TransferStatus2 = FAILED, if the data transmitted from USARTy and
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153 received by USARTz are different */
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154
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155 while (1)
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156 {
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157 }
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158 }
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159
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160 /**
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161 * @brief Configures the different system clocks.
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162 * @param None
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163 * @retval None
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164 */
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165 void RCC_Configuration(void)
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166 {
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167 /* DMA clock enable */
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168 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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169
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170 /* Enable GPIO clock */
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171 RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
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172
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173 #ifndef USE_STM3210C_EVAL
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174 /* Enable USARTy Clock */
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175 RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
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176 #else
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177 /* Enable USARTy Clock */
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178 RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE);
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179 #endif
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180 /* Enable USARTz Clock */
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181 RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE);
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182 }
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183
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184 /**
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185 * @brief Configures the different GPIO ports.
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186 * @param None
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187 * @retval None
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188 */
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189 void GPIO_Configuration(void)
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190 {
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191 GPIO_InitTypeDef GPIO_InitStructure;
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192
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193 #ifdef USE_STM3210C_EVAL
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194 /* Enable the USART3 Pins Software Remapping */
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195 GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
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196
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197 /* Enable the USART2 Pins Software Remapping */
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198 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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199 #elif defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL)
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200 /* Enable the USART2 Pins Software Remapping */
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201 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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202 #endif
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203
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204 /* Configure USARTy Rx as input floating */
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205 GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
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206 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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207 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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208
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209 /* Configure USARTz Rx as input floating */
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210 GPIO_InitStructure.GPIO_Pin = USARTz_RxPin;
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211 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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212
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213 /* Configure USARTy Tx as alternate function push-pull */
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214 GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
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215 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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216 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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217 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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218
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219 /* Configure USARTz Tx as alternate function push-pull */
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220 GPIO_InitStructure.GPIO_Pin = USARTz_TxPin;
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221 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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222 }
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223
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224 /**
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225 * @brief Configures the DMA.
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226 * @param None
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227 * @retval None
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228 */
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229 void DMA_Configuration(void)
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230 {
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231 DMA_InitTypeDef DMA_InitStructure;
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232
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233 /* USARTy TX DMA1 Channel (triggered by USARTy Tx event) Config */
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234 DMA_DeInit(USARTy_Tx_DMA_Channel);
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235 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Base;
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236 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer1;
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237 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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238 DMA_InitStructure.DMA_BufferSize = TxBufferSize1;
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239 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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240 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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241 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
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242 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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243 DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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244 DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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245 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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246 DMA_Init(USARTy_Tx_DMA_Channel, &DMA_InitStructure);
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247
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248 /* USARTy RX DMA1 Channel (triggered by USARTy Rx event) Config */
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249 DMA_DeInit(USARTy_Rx_DMA_Channel);
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250 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Base;
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251 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer1;
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252 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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253 DMA_InitStructure.DMA_BufferSize = TxBufferSize2;
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254 DMA_Init(USARTy_Rx_DMA_Channel, &DMA_InitStructure);
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255
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256 /* USARTz TX DMA1 Channel (triggered by USARTz Tx event) Config */
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257 DMA_DeInit(USARTz_Tx_DMA_Channel);
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258 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTz_DR_Base;
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259 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer2;
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260 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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261 DMA_InitStructure.DMA_BufferSize = TxBufferSize2;
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262 DMA_Init(USARTz_Tx_DMA_Channel, &DMA_InitStructure);
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263
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diff changeset
264 /* USARTz RX DMA1 Channel (triggered by USARTz Rx event) Config */
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265 DMA_DeInit(USARTz_Rx_DMA_Channel);
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266 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTz_DR_Base;
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267 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RxBuffer2;
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268 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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269 DMA_InitStructure.DMA_BufferSize = TxBufferSize1;
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270 DMA_Init(USARTz_Rx_DMA_Channel, &DMA_InitStructure);
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271 }
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272
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273 /**
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274 * @brief Compares two buffers.
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275 * @param pBuffer1, pBuffer2: buffers to be compared.
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276 * @param BufferLength: buffer's length
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277 * @retval PASSED: pBuffer1 identical to pBuffer2
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278 * FAILED: pBuffer1 differs from pBuffer2
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279 */
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280 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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281 {
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282 while(BufferLength--)
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283 {
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284 if(*pBuffer1 != *pBuffer2)
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285 {
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286 return FAILED;
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287 }
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288
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289 pBuffer1++;
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290 pBuffer2++;
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291 }
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292
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293 return PASSED;
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294 }
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295
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296 #ifdef USE_FULL_ASSERT
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297
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298 /**
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299 * @brief Reports the name of the source file and the source line number
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300 * where the assert_param error has occurred.
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301 * @param file: pointer to the source file name
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302 * @param line: assert_param error line source number
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303 * @retval None
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304 */
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305 void assert_failed(uint8_t* file, uint32_t line)
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306 {
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307 /* User can add his own implementation to report the file name and line number,
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308 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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309
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310 /* Infinite loop */
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311 while (1)
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312 {
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313 }
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314 }
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315
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316 #endif
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317
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318 /**
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319 * @}
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320 */
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321
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322 /**
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323 * @}
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324 */
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325
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326 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/