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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/PWR/STOP/main.c @ 0:c59513fd84fb
Initial commit of STM32 test code.
author | Daniel O'Connor <darius@dons.net.au> |
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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 PWR/STOP/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 #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 PWR_STOP |
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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 /* Private macro -------------------------------------------------------------*/ |
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37 /* Private variables ---------------------------------------------------------*/ |
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38 extern __IO uint32_t TimingDelay; |
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39 ErrorStatus HSEStartUpStatus; |
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40 |
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41 /* Private function prototypes -----------------------------------------------*/ |
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42 void SYSCLKConfig_STOP(void); |
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43 void EXTI_Configuration(void); |
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44 void RTC_Configuration(void); |
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45 void NVIC_Configuration(void); |
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46 void SysTick_Configuration(void); |
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47 void Delay(__IO uint32_t nTime); |
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48 |
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49 /* Private functions ---------------------------------------------------------*/ |
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50 |
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51 /** |
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52 * @brief Main program. |
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53 * @param None |
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54 * @retval None |
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55 */ |
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56 int main(void) |
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57 { |
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58 /*!< At this stage the microcontroller clock setting is already configured, |
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59 this is done through SystemInit() function which is called from startup |
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60 file (startup_stm32f10x_xx.s) before to branch to application main. |
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61 To reconfigure the default setting of SystemInit() function, refer to |
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62 system_stm32f10x.c file |
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63 */ |
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64 |
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65 /* Initialize LEDs and Key Button mounted on STM3210X-EVAL board */ |
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66 STM_EVAL_LEDInit(LED1); |
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67 STM_EVAL_LEDInit(LED2); |
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68 STM_EVAL_LEDInit(LED3); |
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69 STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI); |
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70 |
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71 /* Enable PWR and BKP clock */ |
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72 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); |
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73 |
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74 /* Configure EXTI Line to generate an interrupt on falling edge */ |
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75 EXTI_Configuration(); |
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76 |
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77 /* Configure RTC clock source and prescaler */ |
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78 RTC_Configuration(); |
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79 |
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80 /* NVIC configuration */ |
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81 NVIC_Configuration(); |
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82 |
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83 /* Configure the SysTick to generate an interrupt each 1 millisecond */ |
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84 SysTick_Configuration(); |
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85 |
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86 /* Turn on LED1 */ |
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87 STM_EVAL_LEDOn(LED1); |
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88 |
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89 while (1) |
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90 { |
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91 /* Insert 1.5 second delay */ |
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92 Delay(1500); |
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93 |
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94 /* Wait till RTC Second event occurs */ |
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95 RTC_ClearFlag(RTC_FLAG_SEC); |
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96 while(RTC_GetFlagStatus(RTC_FLAG_SEC) == RESET); |
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97 |
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98 /* Alarm in 3 second */ |
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99 RTC_SetAlarm(RTC_GetCounter()+ 3); |
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100 /* Wait until last write operation on RTC registers has finished */ |
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101 RTC_WaitForLastTask(); |
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102 |
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103 /* Turn off LED1 */ |
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104 STM_EVAL_LEDOff(LED1); |
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105 |
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106 /* Request to enter STOP mode with regulator in low power mode*/ |
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107 PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI); |
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108 |
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109 /* At this stage the system has resumed from STOP mode -------------------*/ |
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110 /* Turn on LED1 */ |
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111 STM_EVAL_LEDOn(LED1); |
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112 |
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113 /* Configures system clock after wake-up from STOP: enable HSE, PLL and select |
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114 PLL as system clock source (HSE and PLL are disabled in STOP mode) */ |
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115 SYSCLKConfig_STOP(); |
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116 } |
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117 } |
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118 |
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119 /** |
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120 * @brief Configures system clock after wake-up from STOP: enable HSE, PLL |
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121 * and select PLL as system clock source. |
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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 SYSCLKConfig_STOP(void) |
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126 { |
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127 /* Enable HSE */ |
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128 RCC_HSEConfig(RCC_HSE_ON); |
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129 |
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130 /* Wait till HSE is ready */ |
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131 HSEStartUpStatus = RCC_WaitForHSEStartUp(); |
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132 |
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133 if(HSEStartUpStatus == SUCCESS) |
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134 { |
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135 |
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136 #ifdef STM32F10X_CL |
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137 /* Enable PLL2 */ |
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138 RCC_PLL2Cmd(ENABLE); |
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139 |
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140 /* Wait till PLL2 is ready */ |
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141 while(RCC_GetFlagStatus(RCC_FLAG_PLL2RDY) == RESET) |
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142 { |
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143 } |
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144 |
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145 #endif |
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146 |
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147 /* Enable PLL */ |
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148 RCC_PLLCmd(ENABLE); |
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149 |
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150 /* Wait till PLL is ready */ |
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151 while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) |
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152 { |
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153 } |
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154 |
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155 /* Select PLL as system clock source */ |
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156 RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); |
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157 |
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158 /* Wait till PLL is used as system clock source */ |
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159 while(RCC_GetSYSCLKSource() != 0x08) |
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160 { |
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161 } |
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162 } |
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163 } |
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164 |
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165 /** |
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166 * @brief Configures EXTI Lines. |
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167 * @param None |
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168 * @retval None |
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169 */ |
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170 void EXTI_Configuration(void) |
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171 { |
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172 EXTI_InitTypeDef EXTI_InitStructure; |
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173 |
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174 /* Configure EXTI Line17(RTC Alarm) to generate an interrupt on rising edge */ |
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175 EXTI_ClearITPendingBit(EXTI_Line17); |
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176 EXTI_InitStructure.EXTI_Line = EXTI_Line17; |
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177 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; |
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178 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; |
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179 EXTI_InitStructure.EXTI_LineCmd = ENABLE; |
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180 EXTI_Init(&EXTI_InitStructure); |
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181 } |
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182 |
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183 /** |
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184 * @brief Configures RTC clock source and prescaler. |
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185 * @param None |
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186 * @retval None |
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187 */ |
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188 void RTC_Configuration(void) |
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189 { |
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190 /* RTC clock source configuration ------------------------------------------*/ |
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191 /* Allow access to BKP Domain */ |
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192 PWR_BackupAccessCmd(ENABLE); |
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193 |
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194 /* Reset Backup Domain */ |
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195 BKP_DeInit(); |
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196 |
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197 /* Enable the LSE OSC */ |
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198 RCC_LSEConfig(RCC_LSE_ON); |
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199 /* Wait till LSE is ready */ |
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200 while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) |
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201 { |
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202 } |
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203 |
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204 /* Select the RTC Clock Source */ |
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205 RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); |
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206 |
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207 /* Enable the RTC Clock */ |
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208 RCC_RTCCLKCmd(ENABLE); |
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209 |
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210 /* RTC configuration -------------------------------------------------------*/ |
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211 /* Wait for RTC APB registers synchronisation */ |
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212 RTC_WaitForSynchro(); |
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213 |
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214 /* Set the RTC time base to 1s */ |
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215 RTC_SetPrescaler(32767); |
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216 /* Wait until last write operation on RTC registers has finished */ |
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217 RTC_WaitForLastTask(); |
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218 |
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219 /* Enable the RTC Alarm interrupt */ |
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220 RTC_ITConfig(RTC_IT_ALR, ENABLE); |
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221 /* Wait until last write operation on RTC registers has finished */ |
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222 RTC_WaitForLastTask(); |
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223 } |
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224 |
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225 /** |
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226 * @brief Configures NVIC and Vector Table base location. |
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227 * @param None |
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228 * @retval None |
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229 */ |
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230 void NVIC_Configuration(void) |
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231 { |
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232 NVIC_InitTypeDef NVIC_InitStructure; |
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233 |
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234 /* 2 bits for Preemption Priority and 2 bits for Sub Priority */ |
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235 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); |
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236 |
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237 NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn; |
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238 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; |
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239 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; |
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240 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; |
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241 NVIC_Init(&NVIC_InitStructure); |
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242 } |
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243 |
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244 /** |
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245 * @brief Configures the SysTick to generate an interrupt each 1 millisecond. |
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246 * @param None |
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247 * @retval None |
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248 */ |
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249 void SysTick_Configuration(void) |
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250 { |
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251 /* Setup SysTick Timer for 1 msec interrupts */ |
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252 if (SysTick_Config(SystemCoreClock / 1000)) |
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253 { |
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254 /* Capture error */ |
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255 while (1); |
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256 } |
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257 /* Set SysTick Priority to 3 */ |
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258 NVIC_SetPriority(SysTick_IRQn, 0x0C); |
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259 } |
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260 |
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261 /** |
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262 * @brief Inserts a delay time. |
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263 * @param nTime: specifies the delay time length, in milliseconds. |
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264 * @retval None |
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265 */ |
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266 void Delay(__IO uint32_t nTime) |
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267 { |
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268 TimingDelay = nTime; |
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269 |
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270 while(TimingDelay != 0); |
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271 |
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272 } |
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273 |
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274 #ifdef USE_FULL_ASSERT |
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275 |
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276 /** |
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277 * @brief Reports the name of the source file and the source line number |
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278 * where the assert_param error has occurred. |
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279 * @param file: pointer to the source file name |
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280 * @param line: assert_param error line source number |
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281 * @retval None |
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282 */ |
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283 void assert_failed(uint8_t* file, uint32_t line) |
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284 { |
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285 /* User can add his own implementation to report the file name and line number, |
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286 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
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287 |
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288 /* Infinite loop */ |
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289 while (1) |
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290 { |
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291 } |
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292 } |
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293 |
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294 #endif |
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295 |
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296 /** |
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297 * @} |
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298 */ |
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299 |
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300 /** |
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301 * @} |
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302 */ |
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303 |
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304 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |