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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/USART/DMA_Interrupt/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/DMA_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 USART_DMA_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 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 Interrupt: USARTy -> USARTz using DMA Tx and Rx Flag";
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47 uint8_t TxBuffer2[] = "USART DMA Interrupt: USARTz -> USARTy using DMA Tx and Rx Interrupt";
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48 uint8_t RxBuffer1[TxBufferSize2];
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49 uint8_t RxBuffer2[TxBufferSize1];
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50 uint8_t NbrOfDataToRead = TxBufferSize1;
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51 uint32_t index = 0;
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52 volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
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53
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54 /* Private function prototypes -----------------------------------------------*/
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55 void RCC_Configuration(void);
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56 void GPIO_Configuration(void);
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57 void NVIC_Configuration(void);
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58 void DMA_Configuration(void);
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59 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
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60
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61 /* Private functions ---------------------------------------------------------*/
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62
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63 /**
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64 * @brief Main program
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65 * @param None
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66 * @retval None
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67 */
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68 int main(void)
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69 {
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70 /*!< At this stage the microcontroller clock setting is already configured,
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71 this is done through SystemInit() function which is called from startup
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72 file (startup_stm32f10x_xx.s) before to branch to application main.
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73 To reconfigure the default setting of SystemInit() function, refer to
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74 system_stm32f10x.c file
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75 */
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76
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77 /* System Clocks Configuration */
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78 RCC_Configuration();
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79
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80 /* NVIC configuration */
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81 NVIC_Configuration();
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82
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83 /* Configure the GPIO ports */
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84 GPIO_Configuration();
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85
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86 /* Configure the DMA */
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87 DMA_Configuration();
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88
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89 /* USARTy and USARTz configuration -------------------------------------------*/
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90 /* USARTy and USARTz configured as follow:
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91 - BaudRate = 230400 baud
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92 - Word Length = 8 Bits
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93 - One Stop Bit
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94 - No parity
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95 - Hardware flow control disabled (RTS and CTS signals)
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96 - Receive and transmit enabled
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97 */
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98
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99 USART_InitStructure.USART_BaudRate = 230400;
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100 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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101 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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102 USART_InitStructure.USART_Parity = USART_Parity_No;
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103 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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104 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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105
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106 /* Configure USARTy */
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107 USART_Init(USARTy, &USART_InitStructure);
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108
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109 /* Configure USARTz */
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110 USART_Init(USARTz, &USART_InitStructure);
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111
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112 /* Enable USARTy DMA TX request */
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113 USART_DMACmd(USARTy, USART_DMAReq_Tx, ENABLE);
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114
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115 /* Enable USARTz DMA TX request */
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116 USART_DMACmd(USARTz, USART_DMAReq_Tx, ENABLE);
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117
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118 /* Enable the USARTz Receive Interrupt */
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119 USART_ITConfig(USARTz, USART_IT_RXNE, ENABLE);
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120
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121 /* Enable USARTy */
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122 USART_Cmd(USARTy, ENABLE);
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123
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124 /* Enable USARTz */
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125 USART_Cmd(USARTz, ENABLE);
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126
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127 /* Enable USARTy DMA TX Channel */
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128 DMA_Cmd(USARTy_Tx_DMA_Channel, ENABLE);
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129
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130 /* Enable USARTz DMA TX Channel */
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131 DMA_Cmd(USARTz_Tx_DMA_Channel, ENABLE);
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132
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133 /* Receive the TxBuffer2 */
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134 while(index < TxBufferSize2)
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135 {
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136 while(USART_GetFlagStatus(USARTy, USART_FLAG_RXNE) == RESET)
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137 {
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138 }
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139 RxBuffer1[index++] = USART_ReceiveData(USARTy);
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140 }
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141
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142 /* Wait until USARTy TX DMA1 Channel Transfer Complete */
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143 while (DMA_GetFlagStatus(USARTy_Tx_DMA_FLAG) == RESET)
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144 {
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145 }
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146 /* Wait until USARTz TX DMA1 Channel Transfer Complete */
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147 while (DMA_GetFlagStatus(USARTz_Tx_DMA_FLAG) == RESET)
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148 {
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149 }
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150
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151 /* Check the received data with the send ones */
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152 TransferStatus1 = Buffercmp(TxBuffer2, RxBuffer1, TxBufferSize2);
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153 /* TransferStatus1 = PASSED, if the data transmitted from USARTz and
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154 received by USARTy are the same */
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155 /* TransferStatus1 = FAILED, if the data transmitted from USARTz and
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156 received by USARTy are different */
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157 TransferStatus2 = Buffercmp(TxBuffer1, RxBuffer2, TxBufferSize1);
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158 /* TransferStatus2 = PASSED, if the data transmitted from USARTy and
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159 received by USARTz are the same */
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160 /* TransferStatus2 = FAILED, if the data transmitted from USARTy and
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161 received by USARTz are different */
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162
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163 while (1)
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164 {
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165 }
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166 }
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167
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168 /**
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169 * @brief Configures the different system clocks.
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170 * @param None
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171 * @retval None
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172 */
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173 void RCC_Configuration(void)
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174 {
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175 /* DMA clock enable */
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176 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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177
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178 /* Enable GPIO clock */
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179 RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);
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180
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181 #ifndef USE_STM3210C_EVAL
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182 /* Enable USARTy Clock */
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183 RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
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184 #else
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185 /* Enable USARTy Clock */
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186 RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE);
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187 #endif
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188 /* Enable USARTz Clock */
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189 RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE);
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190 }
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191
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192 /**
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193 * @brief Configures the different GPIO ports.
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194 * @param None
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195 * @retval None
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196 */
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197 void GPIO_Configuration(void)
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198 {
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199 GPIO_InitTypeDef GPIO_InitStructure;
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200
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201 #ifdef USE_STM3210C_EVAL
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202 /* Enable the USART3 Pins Software Remapping */
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203 GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
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204
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205 /* Enable the USART2 Pins Software Remapping */
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206 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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207 #elif defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL)
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208 /* Enable the USART2 Pins Software Remapping */
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209 GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
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210 #endif
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211
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212 /* Configure USARTy Rx as input floating */
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213 GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
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214 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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215 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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216
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217 /* Configure USARTz Rx as input floating */
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218 GPIO_InitStructure.GPIO_Pin = USARTz_RxPin;
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219 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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220
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221 /* Configure USARTy Tx as alternate function push-pull */
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222 GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
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223 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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224 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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225 GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
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226
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227 /* Configure USARTz Tx as alternate function push-pull */
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228 GPIO_InitStructure.GPIO_Pin = USARTz_TxPin;
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229 GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);
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230 }
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231
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232 /**
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233 * @brief Configures the nested vectored interrupt controller.
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234 * @param None
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235 * @retval None
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236 */
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237 void NVIC_Configuration(void)
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238 {
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239 NVIC_InitTypeDef NVIC_InitStructure;
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240
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241 /* Enable the USARTz Interrupt */
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242 NVIC_InitStructure.NVIC_IRQChannel = USARTz_IRQn;
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243 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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244 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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245 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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246 NVIC_Init(&NVIC_InitStructure);
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247 }
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248
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249 /**
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250 * @brief Configures the DMA.
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251 * @param None
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252 * @retval None
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253 */
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254 void DMA_Configuration(void)
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255 {
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256 DMA_InitTypeDef DMA_InitStructure;
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257
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258 /* USARTy_Tx_DMA_Channel (triggered by USARTy Tx event) Config */
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259 DMA_DeInit(USARTy_Tx_DMA_Channel);
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260 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Base;
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261 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer1;
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262 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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263 DMA_InitStructure.DMA_BufferSize = TxBufferSize1;
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264 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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265 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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266 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
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267 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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268 DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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269 DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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270 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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271 DMA_Init(USARTy_Tx_DMA_Channel, &DMA_InitStructure);
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272
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273 /* USARTz_Tx_DMA_Channel (triggered by USARTz Tx event) Config */
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274 DMA_DeInit(USARTz_Tx_DMA_Channel);
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275 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTz_DR_Base;
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276 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer2;
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277 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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278 DMA_InitStructure.DMA_BufferSize = TxBufferSize2;
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279 DMA_Init(USARTz_Tx_DMA_Channel, &DMA_InitStructure);
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280 }
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281
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diff changeset
282 /**
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283 * @brief Compares two buffers.
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284 * @param pBuffer1, pBuffer2: buffers to be compared.
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285 * @param BufferLength: buffer's length
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286 * @retval PASSED: pBuffer1 identical to pBuffer2
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287 * FAILED: pBuffer1 differs from pBuffer2
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288 */
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289 TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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290 {
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291 while(BufferLength--)
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292 {
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293 if(*pBuffer1 != *pBuffer2)
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294 {
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295 return FAILED;
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296 }
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297
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298 pBuffer1++;
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299 pBuffer2++;
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300 }
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301
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302 return PASSED;
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303 }
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304
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305 #ifdef USE_FULL_ASSERT
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306
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307 /**
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308 * @brief Reports the name of the source file and the source line number
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309 * where the assert_param error has occurred.
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310 * @param file: pointer to the source file name
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311 * @param line: assert_param error line source number
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312 * @retval None
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313 */
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314 void assert_failed(uint8_t* file, uint32_t line)
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315 {
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316 /* User can add his own implementation to report the file name and line number,
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317 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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318
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319 /* Infinite loop */
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320 while (1)
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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 #endif
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326
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327 /**
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328 * @}
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329 */
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330
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331 /**
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332 * @}
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333 */
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334
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335 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/