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annotate libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DAC/OneChannel_NoiseWave/main.c @ 8:58d76cf522ff
Split out code into separate files.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Sat, 04 Feb 2012 13:29:31 +1030 |
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1 /** |
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2 ****************************************************************************** |
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3 * @file DAC/OneChannel_NoiseWave/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 DAC_OneChannel_NoiseWave |
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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 /* Init Structure definition */ |
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36 DAC_InitTypeDef DAC_InitStructure; |
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37 |
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38 /* Private macro -------------------------------------------------------------*/ |
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39 /* Private variables ---------------------------------------------------------*/ |
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40 /* Private function prototypes -----------------------------------------------*/ |
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41 void RCC_Configuration(void); |
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42 void GPIO_Configuration(void); |
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43 void Delay(__IO uint32_t nCount); |
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44 |
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45 /* Private functions ---------------------------------------------------------*/ |
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46 |
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47 /** |
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48 * @brief Main program. |
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49 * @param None |
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50 * @retval None |
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51 */ |
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52 int main(void) |
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53 { |
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54 /*!< At this stage the microcontroller clock setting is already configured, |
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55 this is done through SystemInit() function which is called from startup |
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56 file (startup_stm32f10x_xx.s) before to branch to application main. |
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57 To reconfigure the default setting of SystemInit() function, refer to |
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58 system_stm32f10x.c file |
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59 */ |
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60 |
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61 /* System Clocks Configuration */ |
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62 RCC_Configuration(); |
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63 |
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64 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically |
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65 connected to the DAC converter. In order to avoid parasitic consumption, |
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66 the GPIO pin should be configured in analog */ |
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67 GPIO_Configuration(); |
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68 |
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69 /* DAC channel1 Configuration */ |
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70 DAC_InitStructure.DAC_Trigger = DAC_Trigger_Software; |
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71 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Noise; |
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72 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits8_0; |
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73 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; |
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74 DAC_Init(DAC_Channel_1, &DAC_InitStructure); |
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75 |
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76 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is |
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77 automatically connected to the DAC converter. */ |
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78 DAC_Cmd(DAC_Channel_1, ENABLE); |
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79 |
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80 /* Set DAC Channel1 DHR12L register */ |
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81 DAC_SetChannel1Data(DAC_Align_12b_L, 0x7FF0); |
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82 |
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83 while (1) |
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84 { |
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85 /* Start DAC Channel1 conversion by software */ |
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86 DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE); |
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87 } |
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88 } |
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89 |
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90 /** |
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91 * @brief Configures the different system clocks. |
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92 * @param None |
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93 * @retval None |
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94 */ |
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95 void RCC_Configuration(void) |
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96 { |
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97 /* Enable peripheral clocks ------------------------------------------------*/ |
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98 /* GPIOA Periph clock enable */ |
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99 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); |
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100 /* DAC Periph clock enable */ |
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101 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); |
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102 } |
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103 |
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104 /** |
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105 * @brief Configures the different GPIO ports. |
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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 /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically |
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114 connected to the DAC converter. In order to avoid parasitic consumption, |
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115 the GPIO pin should be configured in analog */ |
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116 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; |
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117 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; |
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118 GPIO_Init(GPIOA, &GPIO_InitStructure); |
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119 } |
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120 |
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121 /** |
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122 * @brief Inserts a delay time. |
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123 * @param nCount: specifies the delay time length. |
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124 * @retval None |
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125 */ |
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126 void Delay(__IO uint32_t nCount) |
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127 { |
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128 for(; nCount != 0; nCount--); |
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129 } |
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130 |
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131 #ifdef USE_FULL_ASSERT |
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132 |
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133 /** |
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134 * @brief Reports the name of the source file and the source line number |
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135 * where the assert_param error has occurred. |
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136 * @param file: pointer to the source file name |
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137 * @param line: assert_param error line source number |
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138 * @retval None |
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139 */ |
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140 void assert_failed(uint8_t* file, uint32_t line) |
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141 { |
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142 /* User can add his own implementation to report the file name and line number, |
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143 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
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144 |
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145 /* Infinite loop */ |
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146 while (1) |
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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 #endif |
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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 |
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157 /** |
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158 * @} |
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159 */ |
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160 |
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161 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |