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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/NVIC/DMA_WFIMode/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 NVIC/DMA_WFIMode/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 "stm32_eval.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 NVIC_DMA_WFIMode
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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 /* Private define ------------------------------------------------------------*/
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36 #ifdef USE_STM3210C_EVAL
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37 #define USARTy_DR_Address 0x40004404
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38 #define USARTy_DMA1_Channel DMA1_Channel6
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39 #define USARTy_DMA1_IRQn DMA1_Channel6_IRQn
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40 #else
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41 #define USARTy_DR_Address 0x40013804
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42 #define USARTy_DMA1_Channel DMA1_Channel5
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43 #define USARTy_DMA1_IRQn DMA1_Channel5_IRQn
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44 #endif
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45
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46 /* Private macro -------------------------------------------------------------*/
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47 /* Private variables ---------------------------------------------------------*/
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48 NVIC_InitTypeDef NVIC_InitStructure;
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49 USART_InitTypeDef USART_InitStructure;
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50 DMA_InitTypeDef DMA_InitStructure;
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51 __IO uint32_t LowPowerMode = 0;
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52 uint16_t DST_Buffer[10]= {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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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 DMA_Configuration(void);
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57 uint8_t Buffercmp16(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
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58 void Delay(__IO uint32_t nCount);
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59
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60 /* Private functions ---------------------------------------------------------*/
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61
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62 /**
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63 * @brief Main program.
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64 * @param None
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65 * @retval None
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66 */
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67 int main(void)
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68 {
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69 /*!< At this stage the microcontroller clock setting is already configured,
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70 this is done through SystemInit() function which is called from startup
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71 file (startup_stm32f10x_xx.s) before to branch to application main.
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72 To reconfigure the default setting of SystemInit() function, refer to
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73 system_stm32f10x.c file
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74 */
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75
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76 /* Configure the system clocks */
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77 RCC_Configuration();
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78
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79 /* Initialize Leds and Key Button mounted on STM3210X-EVAL board */
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80 STM_EVAL_LEDInit(LED1);
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81 STM_EVAL_LEDInit(LED2);
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82 STM_EVAL_LEDInit(LED3);
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83 STM_EVAL_LEDInit(LED4);
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84 STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
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85
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86 /* Configures the DMA Channel */
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87 DMA_Configuration();
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88
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89 /* EVAL_COM1 configuration ---------------------------------------------------*/
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90 /* EVAL_COM1 configured as follow:
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91 - BaudRate = 115200 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 USART_InitStructure.USART_BaudRate = 115200;
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99 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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100 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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101 USART_InitStructure.USART_Parity = USART_Parity_No;
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102 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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103 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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104
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105 STM_EVAL_COMInit(COM1, &USART_InitStructure);
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106 USART_DMACmd(EVAL_COM1, USART_DMAReq_Rx, ENABLE);
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107
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108 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
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109
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110 /* Enable the USARTy_DMA1_IRQn Interrupt */
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111 NVIC_InitStructure.NVIC_IRQChannel = USARTy_DMA1_IRQn;
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112 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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113 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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114 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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115 NVIC_Init(&NVIC_InitStructure);
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116
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117 /* Enable the EXTI9_5 Interrupt */
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118 NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
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119 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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120 NVIC_Init(&NVIC_InitStructure);
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121
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122 while (1)
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123 {
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124 if(LowPowerMode == 1)
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125 {
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126
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127 STM_EVAL_LEDOff(LED2);
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128 STM_EVAL_LEDOff(LED3);
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129
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130 /* Request to enter WFI mode */
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131 __WFI();
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132 LowPowerMode = 0;
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133 }
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134
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135 Delay(0xFFFFF);
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136 STM_EVAL_LEDToggle(LED1);
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137 }
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138 }
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139
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140 /**
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141 * @brief Configures the different system clocks
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142 * @param None
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143 * @retval None
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144 */
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145 void RCC_Configuration(void)
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146 {
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147 /* DMA1 clock enable */
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148 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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149 }
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150
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151 /**
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152 * @brief Configures the used DMA Channel.
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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 DMA_Configuration(void)
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157 {
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158 DMA_InitTypeDef DMA_InitStructure;
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159
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160 /* USARTy_DMA1_Channel Config */
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161 DMA_DeInit(USARTy_DMA1_Channel);
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162 DMA_InitStructure.DMA_PeripheralBaseAddr = USARTy_DR_Address;
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163 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)DST_Buffer;
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164 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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165 DMA_InitStructure.DMA_BufferSize = 10;
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166 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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167 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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168 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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169 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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170 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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171 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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172 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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173 DMA_Init(USARTy_DMA1_Channel, &DMA_InitStructure);
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174
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175 /* Enable USARTy_DMA1_Channel Transfer complete interrupt */
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176 DMA_ITConfig(USARTy_DMA1_Channel, DMA_IT_TC, ENABLE);
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177
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178 /* USARTy_DMA1_Channel enable */
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179 DMA_Cmd(USARTy_DMA1_Channel, ENABLE);
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180 }
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181
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182 /**
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183 * @brief Compares two buffers.
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184 * @param pBuffer1, pBuffer2: buffers to be compared.
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185 * @param BufferLength: buffer's length
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186 * @retval 0: pBuffer1 identical to pBuffer2
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187 * 1: pBuffer1 differs from pBuffer2
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188 */
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189 uint8_t Buffercmp16(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
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190 {
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191 while(BufferLength--)
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192 {
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193 if(*pBuffer1 != *pBuffer2)
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194 {
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195 return 1;
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196 }
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197
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198 pBuffer1++;
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199 pBuffer2++;
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200 }
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201 return 0;
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202 }
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203
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204 /**
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205 * @brief Inserts a delay time.
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206 * @param nCount: specifies the delay time length.
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207 * @retval None
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208 */
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209 void Delay(__IO uint32_t nCount)
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210 {
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211 for(; nCount != 0; nCount--);
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212 }
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213
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214 #ifdef USE_FULL_ASSERT
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215
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216 /**
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217 * @brief Reports the name of the source file and the source line number
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218 * where the assert_param error has occurred.
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219 * @param file: pointer to the source file name
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220 * @param line: assert_param error line source number
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221 * @retval None
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222 */
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223 void assert_failed(uint8_t* file, uint32_t line)
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224 {
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225 /* User can add his own implementation to report the file name and line number,
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226 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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227
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228 /* Infinite loop */
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229 while (1)
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230 {
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231 }
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232 }
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233
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234 #endif
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235
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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 /**
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241 * @}
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242 */
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243
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244 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/