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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/Synchronous/main.c @ 8:58d76cf522ff

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Split out code into separate files.
author Daniel O'Connor <darius@dons.net.au>
date Sat, 04 Feb 2012 13:29:31 +1030
parents c59513fd84fb
children
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1 /**
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2 ******************************************************************************
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3 * @file USART/Synchronous/main.c
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4 * @author MCD Application Team
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5 * @version V3.5.0
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6 * @date 08-April-2011
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7 * @brief Main program body
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8 ******************************************************************************
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9 * @attention
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10 *
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11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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17 *
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18 * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
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19 ******************************************************************************
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20 */
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21
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22 /* Includes ------------------------------------------------------------------*/
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23 #include "stm32f10x.h"
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24 #include "platform_config.h"
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25
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26 /** @addtogroup STM32F10x_StdPeriph_Examples
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27 * @{
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28 */
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29
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30 /** @addtogroup USART_Synchronous
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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 #define DYMMY_BYTE 0x00
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41
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42 /* Private macro -------------------------------------------------------------*/
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43 #define countof(a) (sizeof(a) / sizeof(*(a)))
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44
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45 /* Private variables ---------------------------------------------------------*/
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46 USART_InitTypeDef USART_InitStructure;
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47 USART_ClockInitTypeDef USART_ClockInitStructure;
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48
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49 uint8_t TxBuffer1[] = "USART Synchronous Example: USARTy -> SPIy using TXE and RXNE Flags";
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50 uint8_t TxBuffer2[] = "USART Synchronous Example: SPIy -> USARTy using TXE and RXNE Flags";
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51 uint8_t RxBuffer1[TxBufferSize2];
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52 uint8_t RxBuffer2[TxBufferSize1];
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53 __IO uint8_t NbrOfDataToRead1 = TxBufferSize2;
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54 __IO uint8_t NbrOfDataToRead2 = TxBufferSize1;
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55 __IO uint8_t TxCounter1 = 0, RxCounter1 = 0;
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56 __IO uint8_t TxCounter2 = 0, RxCounter2 = 0;
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57 volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
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58
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59 /* Private function prototypes -----------------------------------------------*/
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60 void RCC_Configuration(void);
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61 void GPIO_Configuration(void);
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62 void SPI_Configuration(void);
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63 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
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64
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65 /* Private functions ---------------------------------------------------------*/
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66
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67 /**
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68 * @brief Main program
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69 * @param None
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70 * @retval None
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71 */
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72 int main(void)
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73 {
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74 /*!< At this stage the microcontroller clock setting is already configured,
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75 this is done through SystemInit() function which is called from startup
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76 file (startup_stm32f10x_xx.s) before to branch to application main.
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77 To reconfigure the default setting of SystemInit() function, refer to
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78 system_stm32f10x.c file
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79 */
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80
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81 /* System Clocks Configuration */
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82 RCC_Configuration();
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83
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84 /* Configure the GPIO ports */
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85 GPIO_Configuration();
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86
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87 /* Configure the SPI */
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88 SPI_Configuration();
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89
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90 /* USARTy configuration ------------------------------------------------------*/
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91 /* USARTy configured as follow:
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92 - BaudRate = 115200 baud
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93 - Word Length = 8 Bits
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94 - One Stop Bit
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95 - No parity
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96 - Hardware flow control disabled (RTS and CTS signals)
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97 - Receive and transmit enabled
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98 - USART Clock Enabled
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99 - USART CPOL: Clock is active High
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100 - USART CPHA: Data is captured on the second edge
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101 - USART LastBit: The clock pulse of the last data bit is output to
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102 the SCLK pin
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103 */
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104 USART_ClockInitStructure.USART_Clock = USART_Clock_Enable;
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105 USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;
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106 USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
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107 USART_ClockInitStructure.USART_LastBit = USART_LastBit_Enable;
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108 USART_ClockInit(USARTy, &USART_ClockInitStructure);
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109
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110 USART_InitStructure.USART_BaudRate = 115200;
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111 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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112 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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113 USART_InitStructure.USART_Parity = USART_Parity_No ;
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114 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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115 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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116 USART_Init(USARTy, &USART_InitStructure);
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117
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118 /* Configure the USARTy */
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119 USART_Init(USARTy, &USART_InitStructure);
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120
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121 /* Enable the USARTy */
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122 USART_Cmd(USARTy, ENABLE);
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123
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124 while(NbrOfDataToRead2--)
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125 {
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126 /* Write one byte in the USARTy Transmit Data Register */
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127 USART_SendData(USARTy, TxBuffer1[TxCounter1++]);
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128 /* Wait until end of transmit */
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129 while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET)
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130 {
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131 }
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132 /* Wait the byte is entirely received by SPIy */
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133 while(SPI_I2S_GetFlagStatus(SPIy, SPI_I2S_FLAG_RXNE) == RESET)
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134 {
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135 }
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136 /* Store the received byte in the RxBuffer2 */
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137 RxBuffer2[RxCounter2++] = SPI_I2S_ReceiveData(SPIy);
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138 }
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139
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140 /* Clear the USARTy Data Register */
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141 USART_ReceiveData(USARTy);
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142
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143 while(NbrOfDataToRead1--)
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144 {
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145 /* Wait until end of transmit */
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146 while(SPI_I2S_GetFlagStatus(SPIy, SPI_I2S_FLAG_TXE)== RESET)
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147 {
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148 }
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149 /* Write one byte in the SPIy Transmit Data Register */
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150 SPI_I2S_SendData(SPIy, TxBuffer2[TxCounter2++]);
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151
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152 /* Send a Dummy byte to generate clock to slave */
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153 USART_SendData(USARTy, DYMMY_BYTE);
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154 /* Wait until end of transmit */
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155 while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET)
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156 {
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157 }
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158 /* Wait the byte is entirely received by USARTy */
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159 while(USART_GetFlagStatus(USARTy, USART_FLAG_RXNE) == RESET)
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160 {
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161 }
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162 /* Store the received byte in the RxBuffer1 */
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163 RxBuffer1[RxCounter1++] = USART_ReceiveData(USARTy);
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164 }
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165
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166 /* Check the received data with the send ones */
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167 TransferStatus1 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
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168 /* TransferStatus = PASSED, if the data transmitted from USARTy and
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169 received by SPIy are the same */
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170 /* TransferStatus = FAILED, if the data transmitted from USARTy and
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171 received by SPIy are different */
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172 TransferStatus2 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
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173 /* TransferStatus = PASSED, if the data transmitted from SPIy and
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174 received by USARTy are the same */
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175 /* TransferStatus = FAILED, if the data transmitted from SPIy and
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176 received by USARTy are different */
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177
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178 while (1)
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179 {
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180 }
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181 }
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182
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183 /**
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184 * @brief Configures the different system clocks.
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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 RCC_Configuration(void)
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189 {
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190 /* Enable GPIO clock */
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191 RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | SPIy_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
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192
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193 /* Enable USARTy Clock */
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194 RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
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195 /* Enable SPIy Clock */
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196 RCC_APB2PeriphClockCmd(SPIy_CLK, ENABLE);
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197 }
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198
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199 /**
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200 * @brief Configures the different GPIO ports.
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201 * @param None
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202 * @retval None
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203 */
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204 void GPIO_Configuration(void)
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205 {
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206 GPIO_InitTypeDef GPIO_InitStructure;
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207
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208 /* Configure USARTy TX and USARTy CK pins as alternate function push-pull */
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209 GPIO_InitStructure.GPIO_Pin = USARTy_TxPin | USARTy_ClkPin;
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210 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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211 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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212 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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213
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214 /* Configure SPI1 pins: SCK, MISO and MOSI */
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215 GPIO_InitStructure.GPIO_Pin = SPIy_SCKPin | SPIy_MISOPin | SPIy_MOSIPin;
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216 GPIO_Init(SPIy_GPIO, &GPIO_InitStructure);
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217
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218 /* Configure USARTy RX as input floating */
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219 GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
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220 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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221 GPIO_Init(USARTy_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 SPI.
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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 SPI_Configuration(void)
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230 {
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231 SPI_InitTypeDef SPI_InitStructure;
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232
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233 SPI_StructInit(&SPI_InitStructure);
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234
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235 SPI_I2S_DeInit(SPIy);
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236
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237 /* SPIy Config */
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238 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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239 SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
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240 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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241 SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
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242 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
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243 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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244 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB;
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245
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246 /* Configure SPIy */
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247 SPI_Init(SPIy, &SPI_InitStructure);
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248
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249 /* SPIy enable */
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250 SPI_Cmd(SPIy, ENABLE);
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251 }
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252
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253 /**
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254 * @brief Compares two buffers.
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255 * @param pBuffer1, pBuffer2: buffers to be compared.
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256 * @param BufferLength: buffer's length
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257 * @retval PASSED: pBuffer1 identical to pBuffer2
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258 * FAILED: pBuffer1 differs from pBuffer2
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259 */
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260 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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261 {
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262 while(BufferLength--)
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263 {
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264 if(*pBuffer1 != *pBuffer2)
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265 {
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266 return FAILED;
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267 }
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268
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269 pBuffer1++;
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270 pBuffer2++;
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271 }
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272
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273 return PASSED;
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274 }
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275
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276 #ifdef USE_FULL_ASSERT
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277
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278 /**
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279 * @brief Reports the name of the source file and the source line number
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280 * where the assert_param error has occurred.
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281 * @param file: pointer to the source file name
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282 * @param line: assert_param error line source number
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283 * @retval None
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284 */
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285 void assert_failed(uint8_t* file, uint32_t line)
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286 {
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287 /* User can add his own implementation to report the file name and line number,
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288 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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289
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diff changeset
290 /* Infinite loop */
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291 while (1)
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292 {
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293 }
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294 }
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295
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296 #endif
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297
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298 /**
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299 * @}
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300 */
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301
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302 /**
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303 * @}
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304 */
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305
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306 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/