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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/InputCapture/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 TIM/InputCapture/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 TIM_Input_Capture |
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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 /* Private macro -------------------------------------------------------------*/ |
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36 /* Private variables ---------------------------------------------------------*/ |
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37 TIM_ICInitTypeDef TIM_ICInitStructure; |
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38 |
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39 /* Private function prototypes -----------------------------------------------*/ |
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40 void RCC_Configuration(void); |
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41 void GPIO_Configuration(void); |
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42 void NVIC_Configuration(void); |
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43 |
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44 /* Private functions ---------------------------------------------------------*/ |
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45 |
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46 /** |
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47 * @brief Main program |
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48 * @param None |
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49 * @retval None |
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50 */ |
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51 int main(void) |
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52 { |
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53 /*!< At this stage the microcontroller clock setting is already configured, |
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54 this is done through SystemInit() function which is called from startup |
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55 file (startup_stm32f10x_xx.s) before to branch to application main. |
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56 To reconfigure the default setting of SystemInit() function, refer to |
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57 system_stm32f10x.c file |
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58 */ |
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59 |
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60 /* System Clocks Configuration */ |
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61 RCC_Configuration(); |
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62 |
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63 /* NVIC configuration */ |
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64 NVIC_Configuration(); |
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65 |
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66 /* Configure the GPIO ports */ |
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67 GPIO_Configuration(); |
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68 |
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69 /* TIM3 configuration: Input Capture mode --------------------- |
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70 The external signal is connected to TIM3 CH2 pin (PA.07) |
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71 The Rising edge is used as active edge, |
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72 The TIM3 CCR2 is used to compute the frequency value |
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73 ------------------------------------------------------------ */ |
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74 |
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75 TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; |
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76 TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; |
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77 TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; |
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78 TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; |
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79 TIM_ICInitStructure.TIM_ICFilter = 0x0; |
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80 |
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81 TIM_ICInit(TIM3, &TIM_ICInitStructure); |
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82 |
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83 /* TIM enable counter */ |
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84 TIM_Cmd(TIM3, ENABLE); |
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85 |
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86 /* Enable the CC2 Interrupt Request */ |
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87 TIM_ITConfig(TIM3, TIM_IT_CC2, ENABLE); |
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88 |
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89 while (1); |
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90 } |
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91 |
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92 /** |
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93 * @brief Configures the different system clocks. |
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94 * @param None |
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95 * @retval None |
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96 */ |
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97 void RCC_Configuration(void) |
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98 { |
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99 /* TIM3 clock enable */ |
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100 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); |
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101 |
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102 /* GPIOA and GPIOB clock enable */ |
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103 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); |
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104 } |
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105 |
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106 /** |
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107 * @brief Configure the GPIOD Pins. |
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108 * @param None |
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109 * @retval None |
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110 */ |
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111 void GPIO_Configuration(void) |
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112 { |
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113 GPIO_InitTypeDef GPIO_InitStructure; |
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114 |
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115 /* TIM3 channel 2 pin (PA.07) configuration */ |
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116 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; |
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117 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; |
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118 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; |
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119 |
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120 GPIO_Init(GPIOA, &GPIO_InitStructure); |
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121 } |
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122 |
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123 /** |
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124 * @brief Configure the nested vectored interrupt controller. |
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125 * @param None |
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126 * @retval None |
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127 */ |
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128 void NVIC_Configuration(void) |
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129 { |
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130 NVIC_InitTypeDef NVIC_InitStructure; |
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131 |
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132 /* Enable the TIM3 global Interrupt */ |
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133 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; |
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134 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; |
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135 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; |
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136 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; |
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137 NVIC_Init(&NVIC_InitStructure); |
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138 } |
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139 |
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140 #ifdef USE_FULL_ASSERT |
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141 |
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142 /** |
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143 * @brief Reports the name of the source file and the source line number |
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144 * where the assert_param error has occurred. |
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145 * @param file: pointer to the source file name |
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146 * @param line: assert_param error line source number |
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147 * @retval None |
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148 */ |
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149 void assert_failed(uint8_t* file, uint32_t line) |
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150 { |
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151 /* User can add his own implementation to report the file name and line number, |
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152 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
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153 |
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154 while (1) |
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155 {} |
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156 } |
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157 |
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158 #endif |
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159 |
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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 */ |
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167 |
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168 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |