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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/SPI/CRC/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 SPI/CRC/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 SPI_CRC
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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 BufferSize 32
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38
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39 /* Private macro -------------------------------------------------------------*/
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40 /* Private variables ---------------------------------------------------------*/
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41 SPI_InitTypeDef SPI_InitStructure;
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42 uint16_t SPI1_Buffer_Tx[BufferSize] = {0x0102, 0x0304, 0x0506, 0x0708, 0x090A, 0x0B0C,
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43 0x0D0E, 0x0F10, 0x1112, 0x1314, 0x1516, 0x1718,
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44 0x191A, 0x1B1C, 0x1D1E, 0x1F20, 0x2122, 0x2324,
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45 0x2526, 0x2728, 0x292A, 0x2B2C, 0x2D2E, 0x2F30,
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46 0x3132, 0x3334, 0x3536, 0x3738, 0x393A, 0x3B3C,
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47 0x3D3E, 0x3F40};
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48 uint16_t SPI2_Buffer_Tx[BufferSize] = {0x5152, 0x5354, 0x5556, 0x5758, 0x595A, 0x5B5C,
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49 0x5D5E, 0x5F60, 0x6162, 0x6364, 0x6566, 0x6768,
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50 0x696A, 0x6B6C, 0x6D6E, 0x6F70, 0x7172, 0x7374,
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51 0x7576, 0x7778, 0x797A, 0x7B7C, 0x7D7E, 0x7F80,
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52 0x8182, 0x8384, 0x8586, 0x8788, 0x898A, 0x8B8C,
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53 0x8D8E, 0x8F90};
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54 uint16_t SPI1_Buffer_Rx[BufferSize], SPI2_Buffer_Rx[BufferSize];
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55 uint32_t TxIdx = 0, RxIdx = 0;
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56 __IO uint16_t CRC1Value = 0, CRC2Value = 0;
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57 volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
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58
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59 /* Private functions ---------------------------------------------------------*/
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60 void RCC_Configuration(void);
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61 void GPIO_Configuration(void);
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62 TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
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63
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64 /**
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65 * @brief Main program
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66 * @param None
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67 * @retval None
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68 */
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69 int main(void)
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70 {
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71 /*!< At this stage the microcontroller clock setting is already configured,
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72 this is done through SystemInit() function which is called from startup
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73 file (startup_stm32f10x_xx.s) before to branch to application main.
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74 To reconfigure the default setting of SystemInit() function, refer to
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75 system_stm32f10x.c file
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76 */
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77
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78 /* System clocks configuration ---------------------------------------------*/
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79 RCC_Configuration();
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80
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81 /* GPIO configuration ------------------------------------------------------*/
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82 GPIO_Configuration();
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83
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84 /* SPI1 configuration ------------------------------------------------------*/
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85 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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86 SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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87 SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
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88 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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89 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
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90 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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91 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
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92 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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93 SPI_InitStructure.SPI_CRCPolynomial = 7;
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94 SPI_Init(SPI1, &SPI_InitStructure);
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95
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96 /* SPI2 configuration ------------------------------------------------------*/
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97 SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
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98 SPI_Init(SPI2, &SPI_InitStructure);
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99
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100 /* Enable SPI1 CRC calculation */
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101 SPI_CalculateCRC(SPI1, ENABLE);
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102 /* Enable SPI2 CRC calculation */
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103 SPI_CalculateCRC(SPI2, ENABLE);
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104
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105 /* Enable SPI1 */
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106 SPI_Cmd(SPI1, ENABLE);
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107 /* Enable SPI2 */
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108 SPI_Cmd(SPI2, ENABLE);
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109
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110 /* Transfer procedure */
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111 while (TxIdx < BufferSize - 1)
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112 {
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113 /* Wait for SPI1 Tx buffer empty */
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114 while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
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115 /* Send SPI2 data */
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116 SPI_I2S_SendData(SPI2, SPI2_Buffer_Tx[TxIdx]);
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117 /* Send SPI1 data */
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118 SPI_I2S_SendData(SPI1, SPI1_Buffer_Tx[TxIdx++]);
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119 /* Wait for SPI2 data reception */
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120 while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
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121 /* Read SPI2 received data */
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122 SPI2_Buffer_Rx[RxIdx] = SPI_I2S_ReceiveData(SPI2);
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123 /* Wait for SPI1 data reception */
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124 while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
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125 /* Read SPI1 received data */
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126 SPI1_Buffer_Rx[RxIdx++] = SPI_I2S_ReceiveData(SPI1);
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127 }
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128
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129 /* Wait for SPI1 Tx buffer empty */
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130 while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
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131 /* Wait for SPI2 Tx buffer empty */
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132 while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
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133
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134 /* Send last SPI2_Buffer_Tx data */
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135 SPI_I2S_SendData(SPI2, SPI2_Buffer_Tx[TxIdx]);
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136 /* Enable SPI2 CRC transmission */
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137 SPI_TransmitCRC(SPI2);
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138 /* Send last SPI1_Buffer_Tx data */
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139 SPI_I2S_SendData(SPI1, SPI1_Buffer_Tx[TxIdx]);
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140 /* Enable SPI1 CRC transmission */
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141 SPI_TransmitCRC(SPI1);
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142
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143 /* Wait for SPI1 last data reception */
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144 while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
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145 /* Read SPI1 last received data */
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146 SPI1_Buffer_Rx[RxIdx] = SPI_I2S_ReceiveData(SPI1);
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147
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148 /* Wait for SPI2 last data reception */
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149 while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
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150 /* Read SPI2 last received data */
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151 SPI2_Buffer_Rx[RxIdx] = SPI_I2S_ReceiveData(SPI2);
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152
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153 /* Wait for SPI1 data reception: CRC transmitted by SPI2 */
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154 while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
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155 /* Wait for SPI2 data reception: CRC transmitted by SPI1 */
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156 while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
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157
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158 /* Check the received data with the send ones */
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159 TransferStatus1 = Buffercmp(SPI2_Buffer_Rx, SPI1_Buffer_Tx, BufferSize);
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160 TransferStatus2 = Buffercmp(SPI1_Buffer_Rx, SPI2_Buffer_Tx, BufferSize);
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161 /* TransferStatus1, TransferStatus2 = PASSED, if the data transmitted and received
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162 are correct */
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163 /* TransferStatus1, TransferStatus2 = FAILED, if the data transmitted and received
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164 are different */
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165
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166 /* Test on the SPI1 CRC Error flag */
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167 if ((SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_CRCERR)) == SET)
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168 {
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169 TransferStatus2 = FAILED;
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170 }
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171
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172 /* Test on the SPI2 CRC Error flag */
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173 if ((SPI_I2S_GetFlagStatus(SPI2, SPI_FLAG_CRCERR)) == SET)
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174 {
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175 TransferStatus1 = FAILED;
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176 }
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177
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178 /* Read SPI1 received CRC value */
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179 CRC1Value = SPI_I2S_ReceiveData(SPI1);
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180 /* Read SPI2 received CRC value */
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181 CRC2Value = SPI_I2S_ReceiveData(SPI2);
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182
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183 while (1)
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184 {}
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185 }
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186
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187 /**
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188 * @brief Configures the different system clocks.
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189 * @param None
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190 * @retval None
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191 */
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192 void RCC_Configuration(void)
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193 {
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194 /* PCLK2 = HCLK/2 */
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195 RCC_PCLK2Config(RCC_HCLK_Div2);
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196
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197 /* Enable peripheral clocks --------------------------------------------------*/
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198 /* GPIOA, GPIOB and SPI1 clock enable */
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199 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
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200 RCC_APB2Periph_SPI1, ENABLE);
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201
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202 /* SPI2 Periph clock enable */
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203 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
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204 }
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205
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206 /**
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207 * @brief Configures the different GPIO ports.
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208 * @param None
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209 * @retval None
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210 */
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211 void GPIO_Configuration(void)
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212 {
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213 GPIO_InitTypeDef GPIO_InitStructure;
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214
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215 /* Configure SPI1 pins: SCK, MISO and MOSI ---------------------------------*/
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216 /* Confugure SCK and MOSI pins as Alternate Function Push Pull */
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217 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
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218 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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219 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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220 GPIO_Init(GPIOA, &GPIO_InitStructure);
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221 /* Confugure MISO pin as Input Floating */
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222 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
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223 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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224 GPIO_Init(GPIOA, &GPIO_InitStructure);
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225
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226 /* Configure SPI2 pins: SCK, MISO and MOSI ---------------------------------*/
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227 /* Confugure SCK and MOSI pins as Input Floating */
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228 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;
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229 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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230 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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231 GPIO_Init(GPIOB, &GPIO_InitStructure);
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232 /* Confugure MISO pin as Alternate Function Push Pull */
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233 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
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234 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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235 GPIO_Init(GPIOB, &GPIO_InitStructure);
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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 * @brief Compares two buffers.
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241 * @param pBuffer1, pBuffer2: buffers to be compared.
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242 * @param BufferLength: buffer's length
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243 * @retval PASSED: pBuffer1 identical to pBuffer2
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244 * FAILED: pBuffer1 differs from pBuffer2
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245 */
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246 TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
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247 {
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248 while (BufferLength--)
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249 {
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250 if (*pBuffer1 != *pBuffer2)
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251 {
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252 return FAILED;
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253 }
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254
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255 pBuffer1++;
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256 pBuffer2++;
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257 }
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258
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259 return PASSED;
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260 }
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261
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262 #ifdef USE_FULL_ASSERT
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263
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264 /**
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265 * @brief Reports the name of the source file and the source line number
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266 * where the assert_param error has occurred.
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267 * @param file: pointer to the source file name
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268 * @param line: assert_param error line source number
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269 * @retval None
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270 */
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271 void assert_failed(uint8_t* file, uint32_t line)
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272 {
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273 /* User can add his own implementation to report the file name and line number,
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274 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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275
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276 /* Infinite loop */
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277 while (1)
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278 {}
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279 }
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280
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281 #endif
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282
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283 /**
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284 * @}
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285 */
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286
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287 /**
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288 * @}
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289 */
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290
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291 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/