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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DAC/DualModeDMA_SineWave/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 DAC/DualModeDMA_SineWave/main.c
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4 * @author MCD Application Team
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5 * @version V3.5.0
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6 * @date 08-April-2011
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7 * @brief Main program body.
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8 ******************************************************************************
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9 * @attention
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10 *
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11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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17 *
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18 * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
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19 ******************************************************************************
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20 */
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21
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22 /* Includes ------------------------------------------------------------------*/
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23 #include "stm32f10x.h"
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24
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25 /** @addtogroup STM32F10x_StdPeriph_Examples
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26 * @{
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27 */
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28
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29 /** @addtogroup DAC_DualModeDMA_SineWave
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30 * @{
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31 */
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32
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33 /* Private typedef -----------------------------------------------------------*/
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34 /* Private define ------------------------------------------------------------*/
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35 #define DAC_DHR12RD_Address 0x40007420
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36
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37 /* Init Structure definition */
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38 DAC_InitTypeDef DAC_InitStructure;
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39 DMA_InitTypeDef DMA_InitStructure;
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40 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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41 uint32_t Idx = 0;
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42
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43 /* Private macro -------------------------------------------------------------*/
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44 /* Private variables ---------------------------------------------------------*/
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45 const uint16_t Sine12bit[32] = {
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46 2047, 2447, 2831, 3185, 3498, 3750, 3939, 4056, 4095, 4056,
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47 3939, 3750, 3495, 3185, 2831, 2447, 2047, 1647, 1263, 909,
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48 599, 344, 155, 38, 0, 38, 155, 344, 599, 909, 1263, 1647};
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49
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50 uint32_t DualSine12bit[32];
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51
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52 /* Private function prototypes -----------------------------------------------*/
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53 void RCC_Configuration(void);
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54 void GPIO_Configuration(void);
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55 void Delay(__IO uint32_t nCount);
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56
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57 /* Private functions ---------------------------------------------------------*/
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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
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74 /* System Clocks Configuration */
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75 RCC_Configuration();
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76
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77 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
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78 connected to the DAC converter. In order to avoid parasitic consumption,
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79 the GPIO pin should be configured in analog */
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80 GPIO_Configuration();
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81
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82 /* TIM2 Configuration */
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83 /* Time base configuration */
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84 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
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85 TIM_TimeBaseStructure.TIM_Period = 0x19;
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86 TIM_TimeBaseStructure.TIM_Prescaler = 0x0;
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87 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
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88 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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89 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
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90
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91 /* TIM2 TRGO selection */
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92 TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);
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93
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94 /* DAC channel1 Configuration */
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95 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;
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96 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
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97 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
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98 DAC_Init(DAC_Channel_1, &DAC_InitStructure);
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99
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100 /* DAC channel2 Configuration */
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101 DAC_Init(DAC_Channel_2, &DAC_InitStructure);
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102
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103 /* Fill Sine32bit table */
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104 for (Idx = 0; Idx < 32; Idx++)
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105 {
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106 DualSine12bit[Idx] = (Sine12bit[Idx] << 16) + (Sine12bit[Idx]);
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107 }
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108
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109 #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL
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110 /* DMA2 channel4 configuration */
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111 DMA_DeInit(DMA2_Channel4);
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112 #else
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113 /* DMA1 channel4 configuration */
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114 DMA_DeInit(DMA1_Channel4);
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115 #endif
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116 DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12RD_Address;
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117 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&DualSine12bit;
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118 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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119 DMA_InitStructure.DMA_BufferSize = 32;
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120 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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121 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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122 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
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123 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
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124 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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125 DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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126 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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127
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128 #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL
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129 DMA_Init(DMA2_Channel4, &DMA_InitStructure);
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130 /* Enable DMA2 Channel4 */
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131 DMA_Cmd(DMA2_Channel4, ENABLE);
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132 #else
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133 DMA_Init(DMA1_Channel4, &DMA_InitStructure);
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134 /* Enable DMA1 Channel4 */
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135 DMA_Cmd(DMA1_Channel4, ENABLE);
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136 #endif
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137
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138 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is
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139 automatically connected to the DAC converter. */
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140 DAC_Cmd(DAC_Channel_1, ENABLE);
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141 /* Enable DAC Channel2: Once the DAC channel2 is enabled, PA.05 is
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142 automatically connected to the DAC converter. */
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143 DAC_Cmd(DAC_Channel_2, ENABLE);
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144
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145 /* Enable DMA for DAC Channel2 */
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146 DAC_DMACmd(DAC_Channel_2, ENABLE);
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147
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148 /* TIM2 enable counter */
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149 TIM_Cmd(TIM2, ENABLE);
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150
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151 while (1)
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152 {
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153 }
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154 }
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155
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156
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157 /**
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158 * @brief Configures the different system clocks.
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159 * @param None
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160 * @retval None
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161 */
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162 void RCC_Configuration(void)
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163 {
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164 /* Enable peripheral clocks ------------------------------------------------*/
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165 #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL
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166 /* DMA2 clock enable */
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167 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
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168 #else
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169 /* DMA1 clock enable */
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170 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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171 #endif
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172 /* GPIOA Periph clock enable */
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173 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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174 /* DAC Periph clock enable */
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175 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
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176 /* TIM2 Periph clock enable */
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177 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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178 }
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179
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180
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181 /**
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182 * @brief Configures the different GPIO ports.
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183 * @param None
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184 * @retval None
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185 */
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186 void GPIO_Configuration(void)
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187 {
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188 GPIO_InitTypeDef GPIO_InitStructure;
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189
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190 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
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191 connected to the DAC converter. In order to avoid parasitic consumption,
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192 the GPIO pin should be configured in analog */
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193 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
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194 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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195 GPIO_Init(GPIOA, &GPIO_InitStructure);
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196 }
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197
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198 /**
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199 * @brief Inserts a delay time.
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200 * @param nCount: specifies the delay time length.
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201 * @retval None
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202 */
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203 void Delay(__IO uint32_t nCount)
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204 {
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205 for(; nCount != 0; nCount--);
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206 }
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207
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208 #ifdef USE_FULL_ASSERT
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209
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210 /**
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211 * @brief Reports the name of the source file and the source line number
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212 * where the assert_param error has occurred.
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213 * @param file: pointer to the source file name
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214 * @param line: assert_param error line source number
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215 * @retval None
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216 */
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217 void assert_failed(uint8_t* file, uint32_t line)
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218 {
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219 /* User can add his own implementation to report the file name and line number,
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220 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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221
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222 /* Infinite loop */
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223 while (1)
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224 {
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225 }
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226 }
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227
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228 #endif
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229
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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 /**
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235 * @}
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236 */
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237
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238 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/