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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/TIM10_PWMOutput/main.c @ 48:2f336d212c74
Ignore more emacs crap.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Wed, 03 Apr 2013 23:33:47 +1030 |
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1 /** |
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2 ****************************************************************************** |
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3 * @file TIM/TIM10_PWMOutput/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 TIM10_PWMOutput |
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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 uint16_t CCR1Val = 249; |
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40 uint16_t PrescalerValue = 0; |
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41 |
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42 /* Private function prototypes -----------------------------------------------*/ |
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43 void RCC_Configuration(void); |
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44 void GPIO_Configuration(void); |
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45 |
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46 /* Private functions ---------------------------------------------------------*/ |
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47 |
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48 /** |
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49 * @brief Main program |
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50 * @param None |
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51 * @retval None |
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52 */ |
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53 int main(void) |
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54 { |
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55 /*!< At this stage the microcontroller clock setting is already configured, |
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56 this is done through SystemInit() function which is called from startup |
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57 file (startup_stm32f10x_xx.s) before to branch to application main. |
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58 To reconfigure the default setting of SystemInit() function, refer to |
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59 system_stm32f10x.c file |
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60 */ |
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61 |
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62 /* GPIO Configuration */ |
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63 GPIO_Configuration(); |
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64 |
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65 /* ----------------------------------------------------------------------- |
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66 TIM10 Configuration: generate 1 PWM signal. |
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67 The TIM10CLK frequency is set to SystemCoreClock (72 MHz), to get TIM10 counter |
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68 clock at 24 MHz the Prescaler is computed as following: |
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69 - Prescaler = (TIM10CLK / TIM10 counter clock) - 1 |
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70 |
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71 The TIM10 is running at 36 KHz: TIM10 Frequency = TIM10 counter clock/(ARR + 1) |
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72 = 24 MHz / 666 = 36 KHz |
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73 TIM10 Channel1 duty cycle = (TIM10_CCR1/ TIM10_ARR)* 100 = 37.5% |
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74 ----------------------------------------------------------------------- */ |
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75 /* Compute the prescaler value */ |
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76 PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1; |
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77 /* Time base configuration */ |
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78 TIM_TimeBaseStructure.TIM_Period = 665; |
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79 TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue; |
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80 TIM_TimeBaseStructure.TIM_ClockDivision = 0; |
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81 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; |
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82 |
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83 TIM_TimeBaseInit(TIM10, &TIM_TimeBaseStructure); |
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84 |
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85 /* PWM1 Mode configuration: Channel1 */ |
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86 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; |
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87 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; |
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88 TIM_OCInitStructure.TIM_Pulse = CCR1Val; |
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89 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; |
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90 |
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91 TIM_OC1Init(TIM10, &TIM_OCInitStructure); |
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92 |
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93 TIM_OC1PreloadConfig(TIM10, TIM_OCPreload_Enable); |
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94 |
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95 TIM_ARRPreloadConfig(TIM10, ENABLE); |
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96 |
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97 /* TIM10 enable counter */ |
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98 TIM_Cmd(TIM10, ENABLE); |
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99 |
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100 while (1) |
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101 {} |
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102 } |
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103 |
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104 /** |
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105 * @brief Configure TIM10 pin. |
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106 * @param None |
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107 * @retval None |
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108 */ |
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109 void GPIO_Configuration(void) |
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110 { |
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111 GPIO_InitTypeDef GPIO_InitStructure; |
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112 |
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113 /* Enable TIM10 and GPIOF clock */ |
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114 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM10 | RCC_APB2Periph_GPIOF | |
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115 RCC_APB2Periph_AFIO, ENABLE); |
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116 |
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117 /* Remap TIM10_CH1 on PF6 pin */ |
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118 GPIO_PinRemapConfig(GPIO_Remap_TIM10, ENABLE); |
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119 |
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120 /* GPIOF Configuration: TIM10 Channel1 as alternate function push-pull */ |
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121 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; |
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122 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; |
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123 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; |
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124 |
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125 GPIO_Init(GPIOF, &GPIO_InitStructure); |
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126 } |
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127 |
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128 #ifdef USE_FULL_ASSERT |
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129 |
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130 /** |
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131 * @brief Reports the name of the source file and the source line number |
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132 * where the assert_param error has occurred. |
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133 * @param file: pointer to the source file name |
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134 * @param line: assert_param error line source number |
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135 * @retval None |
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136 */ |
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137 void assert_failed(uint8_t* file, uint32_t line) |
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138 { |
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139 /* User can add his own implementation to report the file name and line number, |
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140 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
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141 |
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142 while (1) |
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143 {} |
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144 } |
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145 |
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146 #endif |
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147 |
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148 /** |
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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 * @} |
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154 */ |
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155 |
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156 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |