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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/NVIC/IRQ_Priority/stm32f10x_it.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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c59513fd84fb Initial commit of STM32 test code.
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1 /**
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2 ******************************************************************************
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3 * @file NVIC/IRQ_Priority/stm32f10x_it.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 Interrupt Service Routines.
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8 * This file provides template for all exceptions handler and peripherals
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9 * interrupt service routine.
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10 ******************************************************************************
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11 * @attention
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12 *
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13 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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14 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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15 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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16 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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17 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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18 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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19 *
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20 * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
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21 ******************************************************************************
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22 */
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23
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24 /* Includes ------------------------------------------------------------------*/
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25 #include "stm32f10x_it.h"
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26 #include "stm32_eval.h"
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27
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28 /** @addtogroup STM32F10x_StdPeriph_Examples
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29 * @{
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30 */
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31
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32 /** @addtogroup IRQ_Priority
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33 * @{
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34 */
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35
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36 /* Private typedef -----------------------------------------------------------*/
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37 /* Private define ------------------------------------------------------------*/
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38 /* Private macro -------------------------------------------------------------*/
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39 /* Private variables ---------------------------------------------------------*/
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40 extern uint8_t PreemptionOccured;
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41 extern uint8_t PreemptionPriorityValue;
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42
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43 /* Private function prototypes -----------------------------------------------*/
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44 /* Private functions ---------------------------------------------------------*/
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45
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46 /******************************************************************************/
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47 /* Cortex-M3 Processor Exceptions Handlers */
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48 /******************************************************************************/
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49
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50 /**
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51 * @brief This function handles NMI exception.
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52 * @param None
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53 * @retval None
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54 */
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55 void NMI_Handler(void)
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56 {
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57 }
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58
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59 /**
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60 * @brief This function handles Hard Fault exception.
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61 * @param None
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62 * @retval None
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63 */
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64 void HardFault_Handler(void)
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65 {
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66 /* Go to infinite loop when Hard Fault exception occurs */
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67 while (1)
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68 {
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69 }
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70 }
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71
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72 /**
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73 * @brief This function handles Memory Manage exception.
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74 * @param None
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75 * @retval None
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76 */
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77 void MemManage_Handler(void)
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78 {
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79 /* Go to infinite loop when Memory Manage exception occurs */
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80 while (1)
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81 {
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82 }
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83 }
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84
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85 /**
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86 * @brief This function handles Bus Fault exception.
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87 * @param None
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88 * @retval None
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89 */
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90 void BusFault_Handler(void)
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91 {
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92 /* Go to infinite loop when Bus Fault exception occurs */
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93 while (1)
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94 {
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95 }
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96 }
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97
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98 /**
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99 * @brief This function handles Usage Fault exception.
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100 * @param None
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101 * @retval None
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102 */
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103 void UsageFault_Handler(void)
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104 {
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105 /* Go to infinite loop when Usage Fault exception occurs */
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106 while (1)
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107 {
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108 }
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109 }
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110
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111 /**
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112 * @brief This function handles SVCall exception.
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113 * @param None
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114 * @retval None
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115 */
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116 void SVC_Handler(void)
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117 {
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118 }
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119
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120 /**
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121 * @brief This function handles Debug Monitor exception.
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122 * @param None
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123 * @retval None
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124 */
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125 void DebugMon_Handler(void)
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126 {
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127 }
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128
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129 /**
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130 * @brief This function handles PendSV_Handler exception.
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131 * @param None
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132 * @retval None
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133 */
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134 void PendSV_Handler(void)
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135 {
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136 }
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137
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138 /**
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139 * @brief This function handles SysTick Handler.
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140 * @param None
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141 * @retval None
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142 */
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143 void SysTick_Handler(void)
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144 {
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145 /* If the EXTI0 IRQ Handler was preempted by SysTick Handler */
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146 if(NVIC_GetActive(WAKEUP_BUTTON_EXTI_IRQn) != 0)
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147 {
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148 PreemptionOccured = 1;
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149 }
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150 }
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151
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152 /******************************************************************************/
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153 /* STM32F10x Peripherals Interrupt Handlers */
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154 /******************************************************************************/
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155
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156 /**
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157 * @brief This function handles External interrupt Line 0 request.
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158 * @param None
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159 * @retval None
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160 */
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161 void EXTI0_IRQHandler(void)
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162 {
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163 /* Generate SysTick exception */
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164 SCB->ICSR |= 0x04000000;
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165
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166 /* Clear WAKEUP_BUTTON_EXTI_LINE pending bit */
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167 EXTI_ClearITPendingBit(WAKEUP_BUTTON_EXTI_LINE);
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168 }
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169
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170 /**
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171 * @brief This function handles External lines 9 to 5 interrupt request.
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172 * @param None
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173 * @retval None
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174 */
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175 void EXTI9_5_IRQHandler(void)
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176 {
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177 NVIC_InitTypeDef NVIC_InitStructure;
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178
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179 if(EXTI_GetITStatus(KEY_BUTTON_EXTI_LINE) != RESET)
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180 {
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181 PreemptionPriorityValue = !PreemptionPriorityValue;
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182 PreemptionOccured = 0;
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183
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184 /* Modify the WAKEUP_BUTTON_EXTI_IRQn Interrupt Preemption Priority */
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185 NVIC_InitStructure.NVIC_IRQChannel = WAKEUP_BUTTON_EXTI_IRQn;
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186 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = PreemptionPriorityValue;
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187 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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188 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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189 NVIC_Init(&NVIC_InitStructure);
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190
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191 /* Configure the SysTick Handler Priority: Preemption priority and subpriority */
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192 NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), !PreemptionPriorityValue, 0));
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193
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194 /* Clear KEY_BUTTON_EXTI_LINE pending bit */
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195 EXTI_ClearITPendingBit(KEY_BUTTON_EXTI_LINE);
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196 }
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197 }
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198
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199 /******************************************************************************/
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200 /* STM32F10x Peripherals Interrupt Handlers */
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201 /* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */
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202 /* available peripheral interrupt handler's name please refer to the startup */
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203 /* file (startup_stm32f10x_xx.s). */
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204 /******************************************************************************/
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205
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206 /**
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207 * @brief This function handles PPP interrupt request.
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208 * @param None
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209 * @retval None
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210 */
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211 /*void PPP_IRQHandler(void)
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212 {
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213 }*/
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214
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215 /**
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216 * @}
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217 */
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218
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219 /**
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220 * @}
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221 */
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222
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223 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/