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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/OnePulse/main.c @ 65:662e7f01c991

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Convert \r\n to \n. While I'm here remove teh readback test since it doesn't work.
author Daniel O'Connor <darius@dons.net.au>
date Sun, 14 Apr 2013 14:26:46 +0930
parents c59513fd84fb
children
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1 /**
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2 ******************************************************************************
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3 * @file TIM/OnePulse/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_OnePulse
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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_ICInitTypeDef TIM_ICInitStructure;
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39 TIM_OCInitTypeDef TIM_OCInitStructure;
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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 /* System Clocks Configuration */
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63 RCC_Configuration();
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64
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65 /* Configure the GPIO ports */
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66 GPIO_Configuration();
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67
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68 /* TIM4 configuration: One Pulse mode ------------------------
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69 The external signal is connected to TIM4_CH2 pin (PB.07),
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70 The Rising edge is used as active edge,
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71 The One Pulse signal is output on TIM4_CH1 pin (PB.06)
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72 The TIM_Pulse defines the delay value
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73 The (TIM_Period - TIM_Pulse) defines the One Pulse value.
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74 TIM2CLK = SystemCoreClock, we want to get TIM2 counter clock at 24 MHz:
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75 - Prescaler = (TIM2CLK / TIM2 counter clock) - 1
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76 The Autoreload value is 65535 (TIM4->ARR), so the maximum frequency value
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77 to trigger the TIM4 input is 24000000/65535 = 300 Hz.
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78
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79 The TIM_Pulse defines the delay value, the delay value is fixed
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80 to 682.6 us:
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81 delay = CCR1/TIM4 counter clock = 682.6 us.
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82 The (TIM_Period - TIM_Pulse) defines the One Pulse value,
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83 the pulse value is fixed to 2.048 ms:
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84 One Pulse value = (TIM_Period - TIM_Pulse) / TIM4 counter clock = 2.048 ms.
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85
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86 * SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
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87 and Connectivity line devices and to 24 MHz for Value line devices
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88 ------------------------------------------------------------ */
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89
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90 /* Compute the prescaler value */
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91 PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
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92 /* Time base configuration */
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93 TIM_TimeBaseStructure.TIM_Period = 65535;
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94 TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
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95 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
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96 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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97
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98 TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
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99
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100 /* TIM4 PWM2 Mode configuration: Channel1 */
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101 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
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102 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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103 TIM_OCInitStructure.TIM_Pulse = 16383;
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104 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
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105
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106 TIM_OC1Init(TIM4, &TIM_OCInitStructure);
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107
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108 /* TIM4 configuration in Input Capture Mode */
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109
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110 TIM_ICStructInit(&TIM_ICInitStructure);
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111
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112 TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
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113 TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
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114 TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
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115 TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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116 TIM_ICInitStructure.TIM_ICFilter = 0;
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117
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118 TIM_ICInit(TIM4, &TIM_ICInitStructure);
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119
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120 /* One Pulse Mode selection */
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121 TIM_SelectOnePulseMode(TIM4, TIM_OPMode_Single);
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122
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123 /* Input Trigger selection */
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124 TIM_SelectInputTrigger(TIM4, TIM_TS_TI2FP2);
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125
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126 /* Slave Mode selection: Trigger Mode */
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127 TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Trigger);
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128
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129 while (1)
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130 {}
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131 }
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132
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133 /**
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134 * @brief Configures the different system clocks.
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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 RCC_Configuration(void)
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139 {
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140 /* TIM4 clock enable */
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141 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
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142
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143 /* GPIOB clock enable */
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144 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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145 }
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146
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147 /**
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148 * @brief Configure the GPIOD Pins.
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149 * @param None
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150 * @retval None
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151 */
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152 void GPIO_Configuration(void)
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153 {
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154 GPIO_InitTypeDef GPIO_InitStructure;
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155
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156 /* TIM4_CH1 pin (PB.06) configuration */
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157 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
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158 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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159 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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160
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161 GPIO_Init(GPIOB, &GPIO_InitStructure);
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162
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163 /* TIM4_CH2 pin (PB.07) configuration */
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164 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
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165 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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166
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167 GPIO_Init(GPIOB, &GPIO_InitStructure);
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168 }
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169
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170 #ifdef USE_FULL_ASSERT
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171
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172 /**
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173 * @brief Reports the name of the source file and the source line number
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174 * where the assert_param error has occurred.
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175 * @param file: pointer to the source file name
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176 * @param line: assert_param error line source number
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177 * @retval None
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178 */
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179 void assert_failed(uint8_t* file, uint32_t line)
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180 {
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181 /* User can add his own implementation to report the file name and line number,
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182 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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183
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184 while (1)
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185 {}
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186 }
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187
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188 #endif
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189
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190 /**
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191 * @}
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192 */
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193
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194 /**
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195 * @}
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196 */
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197
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198 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/