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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DAC/OneChannelDMA_Escalator/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/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>&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_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****/