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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/DMA_Polling/main.c @ 48:2f336d212c74
Ignore more emacs crap.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Wed, 03 Apr 2013 23:33:47 +1030 |
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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>© 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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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****/ |