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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/SPI/Simplex_Interrupt/main.c @ 85:18b154c447bb

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Add note about 1-wire wiring
author Daniel O'Connor <darius@dons.net.au>
date Thu, 12 Mar 2015 23:22:11 +1030
parents c59513fd84fb
children
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1 /**
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2 ******************************************************************************
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3 * @file SPI/Simplex_Interrupt/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 SPI_Simplex_Interrupt
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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 BufferSize 32
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39
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40 /* Private macro -------------------------------------------------------------*/
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41 /* Private variables ---------------------------------------------------------*/
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42 SPI_InitTypeDef SPI_InitStructure;
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43 uint8_t SPI_MASTER_Buffer_Tx[BufferSize] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
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44 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
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45 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
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46 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
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47 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
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48 0x1F, 0x20};
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49 uint8_t SPI_SLAVE_Buffer_Rx[BufferSize];
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50 __IO uint8_t TxIdx = 0, RxIdx = 0;
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51 volatile TestStatus TransferStatus = FAILED;
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52
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53 /* Private functions ---------------------------------------------------------*/
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54 void RCC_Configuration(void);
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55 void GPIO_Configuration(void);
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56 void NVIC_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 /**
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60 * @brief Main program
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61 * @param None
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62 * @retval None
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63 */
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64 int main(void)
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65 {
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66 /*!< At this stage the microcontroller clock setting is already configured,
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67 this is done through SystemInit() function which is called from startup
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68 file (startup_stm32f10x_xx.s) before to branch to application main.
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69 To reconfigure the default setting of SystemInit() function, refer to
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70 system_stm32f10x.c file
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71 */
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72
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73 /* System clocks configuration ---------------------------------------------*/
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74 RCC_Configuration();
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75
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76 /* NVIC configuration ------------------------------------------------------*/
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77 NVIC_Configuration();
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78
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79 /* GPIO configuration ------------------------------------------------------*/
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80 GPIO_Configuration();
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81
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82 /* SPI_MASTER configuration ------------------------------------------------*/
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83 SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
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84 SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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85 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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86 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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87 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
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88 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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89 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
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90 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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91 SPI_InitStructure.SPI_CRCPolynomial = 7;
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92 SPI_Init(SPI_MASTER, &SPI_InitStructure);
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93
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94 /* SPI_SLAVE configuration -------------------------------------------------*/
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95 SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Rx;
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96 SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
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97 SPI_Init(SPI_SLAVE, &SPI_InitStructure);
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98
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99 /* Enable SPI_MASTER TXE interrupt */
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100 SPI_I2S_ITConfig(SPI_MASTER, SPI_I2S_IT_TXE, ENABLE);
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101 /* Enable SPI_SLAVE RXNE interrupt */
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102 SPI_I2S_ITConfig(SPI_SLAVE, SPI_I2S_IT_RXNE, ENABLE);
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103
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104 /* Enable SPI_SLAVE */
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105 SPI_Cmd(SPI_SLAVE, ENABLE);
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106 /* Enable SPI_MASTER */
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107 SPI_Cmd(SPI_MASTER, ENABLE);
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108
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109 /* Transfer procedure */
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110 while (RxIdx < BufferSize)
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111 {}
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112
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113 /* Check the correctness of written dada */
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114 TransferStatus = Buffercmp(SPI_SLAVE_Buffer_Rx, SPI_MASTER_Buffer_Tx, BufferSize);
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115 /* TransferStatus = PASSED, if the transmitted and received data
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116 are equal */
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117 /* TransferStatus = FAILED, if the transmitted and received data
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118 are different */
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119
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120 while (1)
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121 {}
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122 }
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123
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124 /**
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125 * @brief Configures the different system clocks.
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126 * @param None
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127 * @retval None
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128 */
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129 void RCC_Configuration(void)
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130 {
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131 /* PCLK2 = HCLK/2 */
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132 RCC_PCLK2Config(RCC_HCLK_Div2);
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133
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134 /* Enable peripheral clocks --------------------------------------------------*/
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135 #ifdef USE_STM3210C_EVAL
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136 /* Enable GPIO clock for SPI_MASTER and SPI_SLAVE */
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137 RCC_APB2PeriphClockCmd(SPI_MASTER_GPIO_CLK | SPI_SLAVE_GPIO_CLK |
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138 RCC_APB2Periph_AFIO, ENABLE);
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139
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140 /* Enable SPI_MASTER Periph clock */
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141 RCC_APB1PeriphClockCmd(SPI_MASTER_CLK, ENABLE);
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142 #else
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143 /* Enable SPI_MASTER clock and GPIO clock for SPI_MASTER and SPI_SLAVE */
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144 RCC_APB2PeriphClockCmd(SPI_MASTER_GPIO_CLK | SPI_SLAVE_GPIO_CLK |
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145 SPI_MASTER_CLK, ENABLE);
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146 #endif
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147 /* Enable SPI_SLAVE Periph clock */
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148 RCC_APB1PeriphClockCmd(SPI_SLAVE_CLK, ENABLE);
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149 }
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150
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151 /**
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152 * @brief Configures the different GPIO ports.
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153 * @param None
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154 * @retval None
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155 */
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156 void GPIO_Configuration(void)
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157 {
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158 GPIO_InitTypeDef GPIO_InitStructure;
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159
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160 #ifdef USE_STM3210C_EVAL
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161 /* Enable SPI3 Pins Software Remapping */
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162 GPIO_PinRemapConfig(GPIO_Remap_SPI3, ENABLE);
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163 #endif
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164
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165 /* Configure SPI_MASTER pins: SCK and MOSI ---------------------------------*/
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166 /* Configure SCK and MOSI pins as Alternate Function Push Pull */
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167 GPIO_InitStructure.GPIO_Pin = SPI_MASTER_PIN_SCK | SPI_MASTER_PIN_MOSI;
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168 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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169 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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170 GPIO_Init(SPI_MASTER_GPIO, &GPIO_InitStructure);
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171
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172 /* Configure SPI_SLAVE pins: SCK and MISO ---------------------------------*/
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173 /* Configure SCK and MOSI pins as Input Floating */
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174 GPIO_InitStructure.GPIO_Pin = SPI_SLAVE_PIN_SCK ;
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175 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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176 GPIO_Init(SPI_SLAVE_GPIO, &GPIO_InitStructure);
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177 /* Configure MISO pin as Alternate Function Push Pull */
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178 GPIO_InitStructure.GPIO_Pin = SPI_SLAVE_PIN_MISO;
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179 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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180 GPIO_Init(SPI_SLAVE_GPIO, &GPIO_InitStructure);
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181 }
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182
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183 /**
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184 * @brief Configure the nested vectored interrupt controller.
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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 NVIC_Configuration(void)
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189 {
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190 NVIC_InitTypeDef NVIC_InitStructure;
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191
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192 /* 1 bit for pre-emption priority, 3 bits for subpriority */
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193 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
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194
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195 /* Configure and enable SPI_MASTER interrupt -------------------------------*/
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196 NVIC_InitStructure.NVIC_IRQChannel = SPI_MASTER_IRQn;
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197 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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198 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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199 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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200 NVIC_Init(&NVIC_InitStructure);
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201
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202 /* Configure and enable SPI_SLAVE interrupt --------------------------------*/
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203 NVIC_InitStructure.NVIC_IRQChannel = SPI_SLAVE_IRQn;
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204 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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205 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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206 NVIC_Init(&NVIC_InitStructure);
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207 }
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208
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209 /**
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210 * @brief Compares two buffers.
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211 * @param pBuffer1, pBuffer2: buffers to be compared.
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212 * @param BufferLength: buffer's length
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213 * @retval PASSED: pBuffer1 identical to pBuffer2
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214 * FAILED: pBuffer1 differs from pBuffer2
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215 */
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216 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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217 {
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218 while (BufferLength--)
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219 {
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220 if (*pBuffer1 != *pBuffer2)
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221 {
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222 return FAILED;
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223 }
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224
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225 pBuffer1++;
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226 pBuffer2++;
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227 }
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228
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229 return PASSED;
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230 }
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231
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232 #ifdef USE_FULL_ASSERT
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233
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234 /**
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235 * @brief Reports the name of the source file and the source line number
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236 * where the assert_param error has occurred.
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237 * @param file: pointer to the source file name
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238 * @param line: assert_param error line source number
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239 * @retval None
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240 */
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241 void assert_failed(uint8_t* file, uint32_t line)
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242 {
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243 /* User can add his own implementation to report the file name and line number,
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244 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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245
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246 /* Infinite loop */
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247 while (1)
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248 {}
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249 }
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250
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251 #endif
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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
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257 /**
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258 * @}
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259 */
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260
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261 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/