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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DAC/OneChannelDMA_Escalator/main.c @ 89:fc21fb5b171b default tip
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author | Daniel O'Connor <darius@dons.net.au> |
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date | Fri, 13 Mar 2015 11:39:59 +1030 |
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1 /** |
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2 ****************************************************************************** |
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3 * @file DAC/OneChannelDMA_Escalator/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>© 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_OneChannelDMA_Escalator |
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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_DHR8R1_Address 0x40007410 |
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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 |
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41 /* Private macro -------------------------------------------------------------*/ |
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42 /* Private variables ---------------------------------------------------------*/ |
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43 const uint8_t Escalator8bit[6] = {0x0, 0x33, 0x66, 0x99, 0xCC, 0xFF}; |
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44 |
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45 /* Private function prototypes -----------------------------------------------*/ |
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46 void RCC_Configuration(void); |
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47 void GPIO_Configuration(void); |
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48 void Delay(__IO uint32_t nCount); |
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49 |
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50 /* Private functions ---------------------------------------------------------*/ |
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51 |
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52 /** |
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53 * @brief Main program. |
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54 * @param None |
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55 * @retval None |
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56 */ |
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57 int main(void) |
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58 { |
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59 /*!< At this stage the microcontroller clock setting is already configured, |
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60 this is done through SystemInit() function which is called from startup |
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61 file (startup_stm32f10x_xx.s) before to branch to application main. |
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62 To reconfigure the default setting of SystemInit() function, refer to |
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63 system_stm32f10x.c file |
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64 */ |
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65 |
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66 /* System Clocks Configuration */ |
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67 RCC_Configuration(); |
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68 |
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69 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically |
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70 connected to the DAC converter. In order to avoid parasitic consumption, |
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71 the GPIO pin should be configured in analog */ |
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72 GPIO_Configuration(); |
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73 |
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74 /* TIM6 Configuration */ |
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75 TIM_PrescalerConfig(TIM6, 0xF, TIM_PSCReloadMode_Update); |
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76 TIM_SetAutoreload(TIM6, 0xFF); |
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77 /* TIM6 TRGO selection */ |
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78 TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update); |
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79 |
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80 /* DAC channel1 Configuration */ |
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81 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO; |
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82 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; |
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83 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; |
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84 DAC_Init(DAC_Channel_1, &DAC_InitStructure); |
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85 |
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86 #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL |
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87 /* DMA2 channel3 configuration */ |
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88 DMA_DeInit(DMA2_Channel3); |
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89 #else |
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90 /* DMA1 channel3 configuration */ |
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91 DMA_DeInit(DMA1_Channel3); |
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92 #endif |
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93 |
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94 DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_Address; |
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95 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&Escalator8bit; |
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96 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; |
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97 DMA_InitStructure.DMA_BufferSize = 6; |
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98 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; |
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99 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; |
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100 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; |
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101 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; |
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102 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; |
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103 DMA_InitStructure.DMA_Priority = DMA_Priority_High; |
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104 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; |
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105 |
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106 #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL |
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107 DMA_Init(DMA2_Channel3, &DMA_InitStructure); |
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108 /* Enable DMA2 Channel3 */ |
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109 DMA_Cmd(DMA2_Channel3, ENABLE); |
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110 #else |
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111 DMA_Init(DMA1_Channel3, &DMA_InitStructure); |
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112 /* Enable DMA1 Channel3 */ |
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113 DMA_Cmd(DMA1_Channel3, ENABLE); |
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114 #endif |
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115 |
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116 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is |
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117 automatically connected to the DAC converter. */ |
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118 DAC_Cmd(DAC_Channel_1, ENABLE); |
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119 |
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120 /* Enable DMA for DAC Channel1 */ |
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121 DAC_DMACmd(DAC_Channel_1, ENABLE); |
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122 |
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123 /* TIM6 enable counter */ |
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124 TIM_Cmd(TIM6, ENABLE); |
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125 |
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126 while (1) |
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127 { |
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128 } |
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129 } |
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130 |
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131 |
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132 /** |
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133 * @brief Configures the different system clocks. |
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134 * @param None |
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135 * @retval None |
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136 */ |
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137 void RCC_Configuration(void) |
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138 { |
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139 /* Enable peripheral clocks ------------------------------------------------*/ |
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140 #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL |
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141 /* DMA2 clock enable */ |
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142 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); |
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143 #else |
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144 /* DMA1 clock enable */ |
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145 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); |
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146 #endif |
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147 /* GPIOA Periph clock enable */ |
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148 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); |
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149 /* DAC Periph clock enable */ |
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150 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); |
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151 /* TIM6 Periph clock enable */ |
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152 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE); |
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153 } |
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154 |
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155 /** |
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156 * @brief Configures the different GPIO ports. |
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157 * @param None |
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158 * @retval None |
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159 */ |
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160 void GPIO_Configuration(void) |
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161 { |
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162 GPIO_InitTypeDef GPIO_InitStructure; |
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163 |
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164 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically |
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165 connected to the DAC converter. In order to avoid parasitic consumption, |
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166 the GPIO pin should be configured in analog */ |
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167 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; |
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168 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; |
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169 GPIO_Init(GPIOA, &GPIO_InitStructure); |
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170 } |
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171 |
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172 /** |
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173 * @brief Inserts a delay time. |
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174 * @param nCount: specifies the delay time length. |
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175 * @retval None |
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176 */ |
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177 void Delay(__IO uint32_t nCount) |
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178 { |
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179 for(; nCount != 0; nCount--); |
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180 } |
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181 |
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182 #ifdef USE_FULL_ASSERT |
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183 |
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184 /** |
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185 * @brief Reports the name of the source file and the source line number |
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186 * where the assert_param error has occurred. |
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187 * @param file: pointer to the source file name |
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188 * @param line: assert_param error line source number |
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189 * @retval None |
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190 */ |
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191 void assert_failed(uint8_t* file, uint32_t line) |
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192 { |
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193 /* User can add his own implementation to report the file name and line number, |
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194 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
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195 |
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196 /* Infinite loop */ |
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197 while (1) |
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198 { |
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199 } |
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200 } |
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201 |
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202 #endif |
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203 |
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204 /** |
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205 * @} |
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206 */ |
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207 |
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208 /** |
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209 * @} |
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210 */ |
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211 |
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212 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |