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STM32F0xx Standard Peripherals Firmware Library
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STM32F0xx_StdPeriph_Examples/ADC/ADC_BasicExample/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file ADC/ADC_BasicExample/main.c 00004 * @author MCD Application Team 00005 * @version V1.4.0 00006 * @date 24-July-2014 00007 * @brief Main program body 00008 ****************************************************************************** 00009 * @attention 00010 * 00011 * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> 00012 * 00013 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); 00014 * You may not use this file except in compliance with the License. 00015 * You may obtain a copy of the License at: 00016 * 00017 * http://www.st.com/software_license_agreement_liberty_v2 00018 * 00019 * Unless required by applicable law or agreed to in writing, software 00020 * distributed under the License is distributed on an "AS IS" BASIS, 00021 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00022 * See the License for the specific language governing permissions and 00023 * limitations under the License. 00024 * 00025 ****************************************************************************** 00026 */ 00027 00028 /* Includes ------------------------------------------------------------------*/ 00029 #include "main.h" 00030 00031 /** @addtogroup STM32F0xx_StdPeriph_Examples 00032 * @{ 00033 */ 00034 00035 /** @addtogroup ADC_BasicExample 00036 * @{ 00037 */ 00038 00039 /* Private typedef -----------------------------------------------------------*/ 00040 /* Private define ------------------------------------------------------------*/ 00041 #define MESSAGE1 "STM32F0xx CortexM0 " 00042 #ifdef USE_STM320518_EVAL 00043 #define MESSAGE2 " STM320518-EVAL " 00044 #define MESSAGE3 " Turn RV3(PC.01) " 00045 #else 00046 #define MESSAGE2 " STM32072B-EVAL " 00047 #define MESSAGE3 " Turn RV3(PC.00) " 00048 #endif /* USE_STM320518_EVAL */ 00049 #define MESSAGE4 " Potentiometer " 00050 00051 /* Private macro -------------------------------------------------------------*/ 00052 /* Private variables ---------------------------------------------------------*/ 00053 __IO uint16_t ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0; 00054 00055 /* Private function prototypes -----------------------------------------------*/ 00056 static void ADC_Config(void); 00057 static void Display_Init(void); 00058 static void Display(void); 00059 00060 /* Private functions ---------------------------------------------------------*/ 00061 00062 /** 00063 * @brief Main program. 00064 * @param None 00065 * @retval None 00066 */ 00067 int main(void) 00068 { 00069 /*!< At this stage the microcontroller clock setting is already configured, 00070 this is done through SystemInit() function which is called from startup 00071 file (startup_stm32f0xx.s) before to branch to application main. 00072 To reconfigure the default setting of SystemInit() function, refer to 00073 system_stm32f0xx.c file 00074 */ 00075 00076 /* ADC Configuration */ 00077 ADC_Config(); 00078 /* LCD Display init */ 00079 Display_Init(); 00080 00081 /* Infinite loop */ 00082 while (1) 00083 { 00084 /* Test EOC flag */ 00085 while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET); 00086 00087 /* Get ADC1 converted data */ 00088 ADC1ConvertedValue =ADC_GetConversionValue(ADC1); 00089 00090 /* Compute the voltage */ 00091 ADC1ConvertedVoltage = (ADC1ConvertedValue *3300)/0xFFF; 00092 00093 /* Display converted data on the LCD */ 00094 Display(); 00095 } 00096 } 00097 00098 /** 00099 * @brief ADC Configuration 00100 * @param None 00101 * @retval None 00102 */ 00103 static void ADC_Config(void) 00104 { 00105 ADC_InitTypeDef ADC_InitStructure; 00106 GPIO_InitTypeDef GPIO_InitStructure; 00107 00108 /* GPIOC Periph clock enable */ 00109 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE); 00110 00111 /* ADC1 Periph clock enable */ 00112 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); 00113 00114 /* Configure ADC Channel11 as analog input */ 00115 #ifdef USE_STM320518_EVAL 00116 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ; 00117 #else 00118 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ; 00119 #endif /* USE_STM320518_EVAL */ 00120 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; 00121 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; 00122 GPIO_Init(GPIOC, &GPIO_InitStructure); 00123 00124 /* ADCs DeInit */ 00125 ADC_DeInit(ADC1); 00126 00127 /* Initialize ADC structure */ 00128 ADC_StructInit(&ADC_InitStructure); 00129 00130 /* Configure the ADC1 in continuous mode with a resolution equal to 12 bits */ 00131 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; 00132 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; 00133 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; 00134 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; 00135 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward; 00136 ADC_Init(ADC1, &ADC_InitStructure); 00137 00138 /* Convert the ADC1 Channel 11 with 239.5 Cycles as sampling time */ 00139 #ifdef USE_STM320518_EVAL 00140 ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_239_5Cycles); 00141 #else 00142 ADC_ChannelConfig(ADC1, ADC_Channel_10 , ADC_SampleTime_239_5Cycles); 00143 #endif /* USE_STM320518_EVAL */ 00144 00145 /* ADC Calibration */ 00146 ADC_GetCalibrationFactor(ADC1); 00147 00148 /* Enable the ADC peripheral */ 00149 ADC_Cmd(ADC1, ENABLE); 00150 00151 /* Wait the ADRDY flag */ 00152 while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY)); 00153 00154 /* ADC1 regular Software Start Conv */ 00155 ADC_StartOfConversion(ADC1); 00156 00157 } 00158 00159 /** 00160 * @brief Display ADC converted value on LCD 00161 * @param None 00162 * @retval None 00163 */ 00164 void Display(void) 00165 { 00166 uint32_t v=0,mv=0; 00167 uint8_t text[50]; 00168 00169 v=(ADC1ConvertedVoltage)/1000; 00170 mv = (ADC1ConvertedVoltage%1000)/100; 00171 sprintf((char*)text," ADC = %d,%d V ",v,mv); 00172 /* Set the LCD Back Color and Text Color*/ 00173 LCD_SetBackColor(White); 00174 LCD_SetTextColor(Blue); 00175 /* Display */ 00176 LCD_DisplayStringLine(LINE(3), MESSAGE3); 00177 LCD_DisplayStringLine(LINE(4), MESSAGE4); 00178 /* Display voltage value */ 00179 LCD_DisplayStringLine(LINE(6),text); 00180 } 00181 00182 /** 00183 * @brief Display Init (LCD) 00184 * @param None 00185 * @retval None 00186 */ 00187 void Display_Init(void) 00188 { 00189 /* Initialize the LCD */ 00190 #ifdef USE_STM320518_EVAL 00191 STM320518_LCD_Init(); 00192 #else 00193 STM32072B_LCD_Init(); 00194 #endif /* USE_STM320518_EVAL */ 00195 00196 /* Clear the LCD */ 00197 LCD_Clear(White); 00198 00199 /* Set the LCD Text size */ 00200 LCD_SetFont(&Font8x12); 00201 00202 /* Set the LCD Back Color and Text Color*/ 00203 LCD_SetBackColor(Blue); 00204 LCD_SetTextColor(White); 00205 00206 /* Display */ 00207 LCD_DisplayStringLine(LINE(0x13), " ADC conversion example (Basic example)"); 00208 00209 /* Set the LCD Text size */ 00210 LCD_SetFont(&Font16x24); 00211 00212 LCD_DisplayStringLine(LINE(0), MESSAGE1); 00213 LCD_DisplayStringLine(LINE(1), MESSAGE2); 00214 00215 /* Set the LCD Back Color and Text Color*/ 00216 LCD_SetBackColor(White); 00217 LCD_SetTextColor(Blue); 00218 00219 } 00220 00221 #ifdef USE_FULL_ASSERT 00222 00223 /** 00224 * @brief Reports the name of the source file and the source line number 00225 * where the assert_param error has occurred. 00226 * @param file: pointer to the source file name 00227 * @param line: assert_param error line source number 00228 * @retval None 00229 */ 00230 void assert_failed(uint8_t* file, uint32_t line) 00231 { 00232 /* User can add his own implementation to report the file name and line number, 00233 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00234 00235 /* Infinite loop */ 00236 while (1) 00237 { 00238 } 00239 } 00240 #endif 00241 00242 /** 00243 * @} 00244 */ 00245 00246 /** 00247 * @} 00248 */ 00249 00250 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/