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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/OCToggle/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/OCToggle/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_OCToggle
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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_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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38 TIM_OCInitTypeDef TIM_OCInitStructure;
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39 __IO uint16_t CCR1_Val = 32768;
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40 __IO uint16_t CCR2_Val = 16384;
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41 __IO uint16_t CCR3_Val = 8192;
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42 __IO uint16_t CCR4_Val = 4096;
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43 uint16_t PrescalerValue = 0;
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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 NVIC_Configuration(void);
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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 /* NVIC Configuration */
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70 NVIC_Configuration();
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71
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72 /* GPIO Configuration */
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73 GPIO_Configuration();
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74
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75 /* ---------------------------------------------------------------------------
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76 TIM3 Configuration: Output Compare Toggle Mode:
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77 TIM3CLK = SystemCoreClock / 2,
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78 The objective is to get TIM3 counter clock at 12 MHz:
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79 - Prescaler = (TIM3CLK / TIM3 counter clock) - 1
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80 CC1 update rate = TIM3 counter clock / CCR1_Val = 366.2 Hz
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81 CC2 update rate = TIM3 counter clock / CCR2_Val = 732.4 Hz
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82 CC3 update rate = TIM3 counter clock / CCR3_Val = 1464.8 Hz
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83 CC4 update rate = TIM3 counter clock / CCR4_Val = 2929.6 Hz
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84 ----------------------------------------------------------------------------*/
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85 /* Compute the prescaler value */
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86 PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
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87
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88 /* Time base configuration */
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89 TIM_TimeBaseStructure.TIM_Period = 65535;
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90 TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
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91 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
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92 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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93
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94 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
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95
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96 /* Output Compare Toggle Mode configuration: Channel1 */
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97 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
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98 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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99 TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
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100 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
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101 TIM_OC1Init(TIM3, &TIM_OCInitStructure);
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102
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103 TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Disable);
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104
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105 /* Output Compare Toggle Mode configuration: Channel2 */
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106 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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107 TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
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108
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109 TIM_OC2Init(TIM3, &TIM_OCInitStructure);
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110
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111 TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Disable);
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112
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113 /* Output Compare Toggle Mode configuration: Channel3 */
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114 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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115 TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
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116
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117 TIM_OC3Init(TIM3, &TIM_OCInitStructure);
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118
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119 TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Disable);
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120
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121 /* Output Compare Toggle Mode configuration: Channel4 */
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122 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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123 TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
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124
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125 TIM_OC4Init(TIM3, &TIM_OCInitStructure);
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126
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127 TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Disable);
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128
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129 /* TIM enable counter */
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130 TIM_Cmd(TIM3, ENABLE);
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131
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132 /* TIM IT enable */
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133 TIM_ITConfig(TIM3, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);
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134
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135 while (1)
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136 {}
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137 }
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138
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139 /**
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140 * @brief Configures the different system clocks.
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141 * @param None
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142 * @retval None
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143 */
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144 void RCC_Configuration(void)
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145 {
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146 /* PCLK1 = HCLK/4 */
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147 RCC_PCLK1Config(RCC_HCLK_Div4);
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148
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149 /* TIM3 clock enable */
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150 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
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151
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152 /* GPIOA clock enable */
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153 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB|
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154 RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
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155 }
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156
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157 /**
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158 * @brief Configure the TIM3 Pins.
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159 * @param None
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160 * @retval None
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161 */
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162 void GPIO_Configuration(void)
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163 {
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164 GPIO_InitTypeDef GPIO_InitStructure;
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165
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166 #ifdef STM32F10X_CL
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167 /*GPIOB Configuration: TIM3 channel1, 2, 3 and 4 */
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168 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
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169 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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170 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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171
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172 GPIO_Init(GPIOC, &GPIO_InitStructure);
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173
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174 GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);
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175
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176 #else
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177 /* GPIOA Configuration:TIM3 Channel1, 2, 3 and 4 as alternate function push-pull */
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178 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
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179 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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180 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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181
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182 GPIO_Init(GPIOA, &GPIO_InitStructure);
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183
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184 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
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185 GPIO_Init(GPIOB, &GPIO_InitStructure);
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186 #endif
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187 }
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188
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189 /**
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190 * @brief Configure the nested vectored interrupt controller.
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191 * @param None
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192 * @retval None
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193 */
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194 void NVIC_Configuration(void)
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195 {
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196 NVIC_InitTypeDef NVIC_InitStructure;
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197
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198 /* Enable the TIM3 global Interrupt */
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199 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
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200 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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201 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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202 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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203 NVIC_Init(&NVIC_InitStructure);
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204 }
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205
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206 #ifdef USE_FULL_ASSERT
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207
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208 /**
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209 * @brief Reports the name of the source file and the source line number
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210 * where the assert_param error has occurred.
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211 * @param file: pointer to the source file name
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212 * @param line: assert_param error line source number
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213 * @retval None
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214 */
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215 void assert_failed(uint8_t* file, uint32_t line)
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216 {
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217 /* User can add his own implementation to report the file name and line number,
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218 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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219
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220 while (1)
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221 {}
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222 }
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223
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224 #endif
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225 /**
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226 * @}
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227 */
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228
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229 /**
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230 * @}
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231 */
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232
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233 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/