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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/PWM_Input/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 TIM/PWM_Input/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 TIM_PWM_Input
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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: PWM Input mode ------------------------
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70 The external signal is connected to TIM3 CH2 pin (PA.01),
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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 The TIM3 CCR1 is used to compute the duty cycle value
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74 ------------------------------------------------------------ */
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75
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76 TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
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77 TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
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78 TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
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79 TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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80 TIM_ICInitStructure.TIM_ICFilter = 0x0;
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81
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82 TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);
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83
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84 /* Select the TIM3 Input Trigger: TI2FP2 */
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85 TIM_SelectInputTrigger(TIM3, TIM_TS_TI2FP2);
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86
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87 /* Select the slave Mode: Reset Mode */
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88 TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Reset);
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89
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90 /* Enable the Master/Slave Mode */
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91 TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable);
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92
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93 /* TIM enable counter */
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94 TIM_Cmd(TIM3, ENABLE);
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95
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96 /* Enable the CC2 Interrupt Request */
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97 TIM_ITConfig(TIM3, TIM_IT_CC2, ENABLE);
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98
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99 while (1);
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100 }
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101
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102 /**
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103 * @brief Configures the different system clocks.
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104 * @param None
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105 * @retval None
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106 */
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107 void RCC_Configuration(void)
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108 {
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109 /* TIM3 clock enable */
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110 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
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111
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112 /* GPIOA clock enable */
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113 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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114 }
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115
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116 /**
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117 * @brief Configure the GPIO Pins.
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118 * @param None
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119 * @retval None
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120 */
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121 void GPIO_Configuration(void)
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122 {
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123 GPIO_InitTypeDef GPIO_InitStructure;
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124
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125 /* TIM3 channel 2 pin (PA.07) configuration */
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126 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
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127 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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128 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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129
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130 GPIO_Init(GPIOA, &GPIO_InitStructure);
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131 }
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132
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133 /**
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134 * @brief Configure the nested vectored interrupt controller.
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135 * @param None
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136 * @retval None
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137 */
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138 void NVIC_Configuration(void)
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139 {
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140 NVIC_InitTypeDef NVIC_InitStructure;
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141
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142 /* Enable the TIM3 global Interrupt */
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143 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
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144 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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145 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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146 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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147 NVIC_Init(&NVIC_InitStructure);
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148 }
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149
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150 #ifdef USE_FULL_ASSERT
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151
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152 /**
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153 * @brief Reports the name of the source file and the source line number
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154 * where the assert_param error has occurred.
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155 * @param file: pointer to the source file name
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156 * @param line: assert_param error line source number
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157 * @retval None
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158 */
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159 void assert_failed(uint8_t* file, uint32_t line)
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160 {
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161 /* User can add his own implementation to report the file name and line number,
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162 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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163
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164 while (1)
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165 {}
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166 }
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167
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168 #endif
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169
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170 /**
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171 * @}
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172 */
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173
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174 /**
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175 * @}
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176 */
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177
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178 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/