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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DMA/I2C_RAM/main.c @ 0:c59513fd84fb

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Initial commit of STM32 test code.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 03 Oct 2011 21:19:15 +1030
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1 /**
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2 ******************************************************************************
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3 * @file DMA/I2C_RAM/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
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25 /** @addtogroup STM32F10x_StdPeriph_Examples
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26 * @{
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27 */
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28
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29 /** @addtogroup DMA_I2C_RAM
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30 * @{
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31 */
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32
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33 /* Private typedef -----------------------------------------------------------*/
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34 typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
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35
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36 /* Private define ------------------------------------------------------------*/
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37 #define I2C1_DR_Address 0x40005410
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38 #define I2C2_DR_Address 0x40005810
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39 #define I2C1_SLAVE_ADDRESS7 0x30
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40 #define I2C2_SLAVE_ADDRESS7 0x30
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41 #define BufferSize 8
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42 #define ClockSpeed 100000
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43
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44 /* Private macro -------------------------------------------------------------*/
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45 /* Private variables ---------------------------------------------------------*/
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46 I2C_InitTypeDef I2C_InitStructure;
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47 DMA_InitTypeDef DMA_InitStructure;
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48 uint8_t I2C1_Buffer_Tx[BufferSize] = {1, 2, 3, 4, 5, 6, 7, 8};
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49 uint8_t I2C2_Buffer_Rx[BufferSize];
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50 uint8_t Tx_Idx = 0, Rx_Idx = 0;
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51 volatile TestStatus TransferStatus;
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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 TestStatus Buffercmp(uint8_t* pBuffer, uint8_t* pBuffer1, uint16_t BufferLength);
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57
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58 /* Private functions ---------------------------------------------------------*/
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59
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60 /**
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61 * @brief Main program
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62 * @param None
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63 * @retval None
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64 */
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65 int main(void)
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66 {
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67 /*!< At this stage the microcontroller clock setting is already configured,
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68 this is done through SystemInit() function which is called from startup
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69 file (startup_stm32f10x_xx.s) before to branch to application main.
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70 To reconfigure the default setting of SystemInit() function, refer to
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71 system_stm32f10x.c file
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72 */
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73
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74 /* System Clocks Configuration */
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75 RCC_Configuration();
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76
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77 /* Configure the GPIO ports */
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78 GPIO_Configuration();
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79
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80 /* DMA1 channel5 configuration ----------------------------------------------*/
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81 DMA_DeInit(DMA1_Channel5);
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82 DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)I2C2_DR_Address;
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83 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)I2C2_Buffer_Rx;
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84 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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85 DMA_InitStructure.DMA_BufferSize = BufferSize;
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86 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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87 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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88 DMA_InitStructure.DMA_PeripheralDataSize = DMA_MemoryDataSize_Byte;
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89 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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90 DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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91 DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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92 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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93 DMA_Init(DMA1_Channel5, &DMA_InitStructure);
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94
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95 /* DMA1 channel6 configuration ----------------------------------------------*/
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96 DMA_DeInit(DMA1_Channel6);
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97 DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)I2C1_DR_Address;
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98 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)I2C1_Buffer_Tx;
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99 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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100 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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101 DMA_Init(DMA1_Channel6, &DMA_InitStructure);
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102
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103 /* Enable I2C1 and I2C2 ----------------------------------------------------*/
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104 I2C_Cmd(I2C1, ENABLE);
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105 I2C_Cmd(I2C2, ENABLE);
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106
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107 /* I2C1 configuration ------------------------------------------------------*/
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108 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
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109 I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
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110 I2C_InitStructure.I2C_OwnAddress1 = I2C1_SLAVE_ADDRESS7;
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111 I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
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112 I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
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113 I2C_InitStructure.I2C_ClockSpeed = ClockSpeed;
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114 I2C_Init(I2C1, &I2C_InitStructure);
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115 /* I2C2 configuration ------------------------------------------------------*/
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116 I2C_InitStructure.I2C_OwnAddress1 = I2C2_SLAVE_ADDRESS7;
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117 I2C_Init(I2C2, &I2C_InitStructure);
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118
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119 /*----- Transmission Phase -----*/
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120 /* Send I2C1 START condition */
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121 I2C_GenerateSTART(I2C1, ENABLE);
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122 /* Test on I2C1 EV5 and clear it */
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123 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
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124 /* Send I2C2 slave Address for write */
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125 I2C_Send7bitAddress(I2C1, I2C2_SLAVE_ADDRESS7, I2C_Direction_Transmitter);
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126 /* Test on I2C2 EV1 and clear it */
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127 while(!I2C_CheckEvent(I2C2, I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED));
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128 /* Test on I2C1 EV6 and clear it */
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129 while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
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130
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131 /* Enable I2C2 DMA */
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132 I2C_DMACmd(I2C2, ENABLE);
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133 /* Enable I2C1 DMA */
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134 I2C_DMACmd(I2C1, ENABLE);
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135
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136 /* Enable DMA1 Channel5 */
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137 DMA_Cmd(DMA1_Channel5, ENABLE);
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138 /* Enable DMA1 Channel6 */
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139 DMA_Cmd(DMA1_Channel6, ENABLE);
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140
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141 /* DMA1 Channel5 transfer complete test */
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142 while(!DMA_GetFlagStatus(DMA1_FLAG_TC5));
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143 /* DMA1 Channel6 transfer complete test */
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144 while(!DMA_GetFlagStatus(DMA1_FLAG_TC6));
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145
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146 /* Send I2C1 STOP Condition */
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147 I2C_GenerateSTOP(I2C1, ENABLE);
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148 /* Test on I2C2 EV4 */
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149 while(!I2C_CheckEvent(I2C2, I2C_EVENT_SLAVE_STOP_DETECTED));
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150 /* Clear I2C2 STOPF flag: read operation to I2C_SR1 followed by a
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151 write operation to I2C_CR1 */
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152 (void)(I2C_GetFlagStatus(I2C2, I2C_FLAG_STOPF));
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153 I2C_Cmd(I2C2, ENABLE);
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154
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155
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156 /* Check if the transmitted and received data are equal */
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157 TransferStatus = Buffercmp(I2C1_Buffer_Tx, I2C2_Buffer_Rx, BufferSize);
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158 /* TransferStatus = PASSED, if the transmitted and received data
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159 are the same */
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160 /* TransferStatus = FAILED, if the transmitted and received data
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161 are different */
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162
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163 while (1)
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164 {
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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 * @brief Configures the different system clocks.
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170 * @param None
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171 * @retval None
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172 */
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173 void RCC_Configuration(void)
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174 {
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175 /* Enable DMA1 clock */
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176 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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177 /* Enable GPIOB clock */
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178 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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179 /* Enable I2C1 and I2C2 clock */
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180 RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 | RCC_APB1Periph_I2C2, ENABLE);
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181 }
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182
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183 /**
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184 * @brief Configures the different GPIO ports.
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185 * @param None
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186 * @retval None
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187 */
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188 void GPIO_Configuration(void)
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189 {
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190 GPIO_InitTypeDef GPIO_InitStructure;
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191
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192 /* Configure I2C1 pins: SCL and SDA */
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193 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
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194 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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195 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
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196 GPIO_Init(GPIOB, &GPIO_InitStructure);
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197
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198 /* Configure I2C2 pins: SCL and SDA */
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199 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
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200 GPIO_Init(GPIOB, &GPIO_InitStructure);
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201 }
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202
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203 /**
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204 * @brief Compares two buffers.
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205 * @param pBuffer, pBuffer1: buffers to be compared.
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206 * @param BufferLength: buffer's length
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207 * @retval PASSED: pBuffer identical to pBuffer1
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208 * FAILED: pBuffer differs from pBuffer1
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209 */
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210 TestStatus Buffercmp(uint8_t* pBuffer, uint8_t* pBuffer1, uint16_t BufferLength)
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211 {
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212 while(BufferLength--)
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213 {
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214 if(*pBuffer != *pBuffer1)
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215 {
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216 return FAILED;
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217 }
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218
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219 pBuffer++;
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220 pBuffer1++;
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221 }
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222
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223 return PASSED;
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224 }
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225
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226 #ifdef USE_FULL_ASSERT
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227
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228 /**
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229 * @brief Reports the name of the source file and the source line number
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230 * where the assert_param error has occurred.
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231 * @param file: pointer to the source file name
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232 * @param line: assert_param error line source number
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233 * @retval None
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234 */
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235 void assert_failed(uint8_t* file, uint32_t line)
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236 {
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237 /* User can add his own implementation to report the file name and line number,
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238 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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239
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240 /* Infinite loop */
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241 while (1)
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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 #endif
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247
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248 /**
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249 * @}
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250 */
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251
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252 /**
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253 * @}
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254 */
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255
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256 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/