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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/TIM9_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/TIM9_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 TIM9_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 CCR1Val = 32768;
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40 __IO uint16_t CCR2Val = 16384;
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41 uint16_t PrescalerValue = 0;
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42
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43 /* Private function prototypes -----------------------------------------------*/
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44 void GPIO_Configuration(void);
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45 void NVIC_Configuration(void);
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46
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47 /* Private functions ---------------------------------------------------------*/
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48
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49 /**
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50 * @brief Main program
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51 * @param None
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52 * @retval None
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53 */
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54 int main(void)
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55 {
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56 /*!< At this stage the microcontroller clock setting is already configured,
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57 this is done through SystemInit() function which is called from startup
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58 file (startup_stm32f10x_xx.s) before to branch to application main.
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59 To reconfigure the default setting of SystemInit() function, refer to
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60 system_stm32f10x.c file
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61 */
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62
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63 /* Configure TIM9 pins */
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64 GPIO_Configuration();
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65
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66 /* NVIC Configuration */
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67 NVIC_Configuration();
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68
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69 /* ---------------------------------------------------------------------------
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70 TIM9 Configuration: Output Compare Toggle Mode:
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71 TIM9CLK = SystemCoreClock (72MHz),
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72 The objective is to get TIM9 counter clock at 24 MHz:
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73 - Prescaler = (TIM9CLK / TIM9 counter clock) - 1
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74 CC1 update rate = TIM9 counter clock / CCR1Val = 732.4 Hz
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75 CC2 update rate = TIM9 counter clock / CCR2Val = 1464.8 Hz
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76 ----------------------------------------------------------------------------*/
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77 /* Compute the prescaler value */
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78 PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
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79
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80 /* Time base configuration */
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81 TIM_TimeBaseStructure.TIM_Period = 65535;
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82 TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
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83 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
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84 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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85
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86 TIM_TimeBaseInit(TIM9, &TIM_TimeBaseStructure);
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87
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88 /* Output Compare Toggle Mode configuration: Channel1 */
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89 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
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90 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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91 TIM_OCInitStructure.TIM_Pulse = CCR1Val;
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92 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
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93 TIM_OC1Init(TIM9, &TIM_OCInitStructure);
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94
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95 TIM_OC1PreloadConfig(TIM9, TIM_OCPreload_Disable);
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96
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97 /* Output Compare Toggle Mode configuration: Channel2 */
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98 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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99 TIM_OCInitStructure.TIM_Pulse = CCR2Val;
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100
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101 TIM_OC2Init(TIM9, &TIM_OCInitStructure);
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102
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103 TIM_OC2PreloadConfig(TIM9, TIM_OCPreload_Disable);
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104
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105 /* TIM enable counter */
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106 TIM_Cmd(TIM9, ENABLE);
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107
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108 /* TIM IT enable */
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109 TIM_ITConfig(TIM9, TIM_IT_CC1 | TIM_IT_CC2, ENABLE);
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110
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111 while (1)
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112 {
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113 }
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114 }
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115
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116 /**
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117 * @brief Configure TIM9 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 /* Enable TIM9 and GPIOA clock */
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126 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM9 | RCC_APB2Periph_GPIOA, ENABLE);
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127
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128 /* GPIOA Configuration:TIM9 Channel1 and 2 as alternate function push-pull */
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129 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
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130 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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131 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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132
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133 GPIO_Init(GPIOA, &GPIO_InitStructure);
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134 }
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135
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136 /**
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137 * @brief Configure the nested vectored interrupt controller.
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138 * @param None
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139 * @retval None
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140 */
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141 void NVIC_Configuration(void)
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142 {
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143 NVIC_InitTypeDef NVIC_InitStructure;
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144
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145 /* Enable the TIM9 global Interrupt */
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146 NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_TIM9_IRQn;
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147 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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148 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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149 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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150 NVIC_Init(&NVIC_InitStructure);
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151 }
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152
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153 #ifdef USE_FULL_ASSERT
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154
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155 /**
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156 * @brief Reports the name of the source file and the source line number
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157 * where the assert_param error has occurred.
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158 * @param file: pointer to the source file name
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159 * @param line: assert_param error line source number
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160 * @retval None
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161 */
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162 void assert_failed(uint8_t* file, uint32_t line)
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163 {
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164 /* User can add his own implementation to report the file name and line number,
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165 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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166
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167 while (1)
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168 {}
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169 }
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170
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171 #endif
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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 */
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179
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180 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/