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STM32F0xx Standard Peripherals Firmware Library
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STM32F0xx_StdPeriph_Examples/ADC/ADC_AnalogWatchdog/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file ADC/ADC_AnalogWatchdog/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_AnalogWatchdog 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 #elif defined (USE_STM32072B_EVAL) 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 uint32_t ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0; 00054 00055 /* Private function prototypes -----------------------------------------------*/ 00056 /* Private functions ---------------------------------------------------------*/ 00057 static void Display_Init(void); 00058 static void Display(void); 00059 static void ADC_Config(void); 00060 00061 /** 00062 * @brief Main program. 00063 * @param None 00064 * @retval None 00065 */ 00066 int main(void) 00067 { 00068 /*!< At this stage the microcontroller clock setting is already configured, 00069 this is done through SystemInit() function which is called from startup 00070 file (startup_stm32f0xx.s) before to branch to application main. 00071 To reconfigure the default setting of SystemInit() function, refer to 00072 system_stm32f0xx.c file 00073 */ 00074 00075 /* LCD Display init */ 00076 Display_Init(); 00077 00078 /* Initialize LED4 */ 00079 STM_EVAL_LEDInit(LED4); 00080 00081 /* Configure ADC channel 11 */ 00082 ADC_Config(); 00083 00084 /* Infinite loop */ 00085 while (1) 00086 { 00087 /* Get ADC1 converted data */ 00088 ADC1ConvertedValue =ADC_GetConversionValue(ADC1); 00089 00090 /* Compute the voltage */ 00091 ADC1ConvertedVoltage = (ADC1ConvertedValue *3300)/0xFFF; 00092 00093 00094 /* Display converted data on the LCD */ 00095 Display(); 00096 } 00097 } 00098 00099 /** 00100 * @brief ADC1 channel configuration 00101 * @param None 00102 * @retval None 00103 */ 00104 static void ADC_Config(void) 00105 { 00106 ADC_InitTypeDef ADC_InitStructure; 00107 GPIO_InitTypeDef GPIO_InitStructure; 00108 NVIC_InitTypeDef NVIC_InitStructure; 00109 00110 /* GPIOC Periph clock enable */ 00111 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE); 00112 00113 /* ADC1 Periph clock enable */ 00114 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); 00115 00116 /* Configure ADC Channel11 as analog input */ 00117 #ifdef USE_STM320518_EVAL 00118 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ; 00119 #elif defined (USE_STM32072B_EVAL) 00120 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ; 00121 #endif /* USE_STM320518_EVAL */ 00122 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; 00123 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; 00124 GPIO_Init(GPIOC, &GPIO_InitStructure); 00125 00126 /* ADC1 DeInit */ 00127 ADC_DeInit(ADC1); 00128 00129 /* Initialize ADC structure */ 00130 ADC_StructInit(&ADC_InitStructure); 00131 00132 /* Configure the ADC1 in continuous mode withe a resolution equal to 12 bits */ 00133 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; 00134 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; 00135 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; 00136 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; 00137 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward; 00138 ADC_Init(ADC1, &ADC_InitStructure); 00139 00140 /* Convert the ADC1 Channel11 and channel10 with 239.5 Cycles as sampling time */ 00141 #ifdef USE_STM320518_EVAL 00142 ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_239_5Cycles); 00143 #elif defined (USE_STM32072B_EVAL) 00144 ADC_ChannelConfig(ADC1, ADC_Channel_10 , ADC_SampleTime_239_5Cycles); 00145 #endif /* USE_STM320518_EVAL */ 00146 00147 /* Analog watchdog config ******************************************/ 00148 /* Configure the ADC Thresholds between 1.5V and 2.5V (1861, 3102) */ 00149 ADC_AnalogWatchdogThresholdsConfig(ADC1, 3102, 1861); 00150 00151 /* Enable the ADC1 single channel */ 00152 ADC_AnalogWatchdogSingleChannelCmd(ADC1, ENABLE); 00153 00154 ADC_OverrunModeCmd(ADC1, ENABLE); 00155 /* Enable the ADC1 analog watchdog */ 00156 ADC_AnalogWatchdogCmd(ADC1,ENABLE); 00157 00158 /* Select a single ADC1 channel 11 */ 00159 #ifdef USE_STM320518_EVAL 00160 ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_AnalogWatchdog_Channel_11); 00161 #elif defined (USE_STM32072B_EVAL) 00162 ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_AnalogWatchdog_Channel_10); 00163 #endif /* USE_STM320518_EVAL */ 00164 00165 /* Enable AWD interrupt */ 00166 ADC_ITConfig(ADC1, ADC_IT_AWD, ENABLE); 00167 00168 /* Configure and enable ADC1 interrupt */ 00169 NVIC_InitStructure.NVIC_IRQChannel = ADC1_COMP_IRQn; 00170 NVIC_InitStructure.NVIC_IRQChannelPriority = 0; 00171 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 00172 NVIC_Init(&NVIC_InitStructure); 00173 00174 /* Enable the ADC1 Calibration */ 00175 ADC_GetCalibrationFactor(ADC1); 00176 00177 /* Enable the ADC peripheral */ 00178 ADC_Cmd(ADC1, ENABLE); 00179 00180 /* Wait the ADRDY flag */ 00181 while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY)); 00182 00183 /* ADC1 regular Software Start Conv */ 00184 ADC_StartOfConversion(ADC1); 00185 } 00186 00187 /** 00188 * @brief Display ADC converted value on LCD 00189 * @param None 00190 * @retval None 00191 */ 00192 static void Display(void) 00193 { 00194 uint32_t v=0,mv=0; 00195 uint8_t text[50]; 00196 00197 /* Set the LCD Back Color and Text Color*/ 00198 LCD_SetBackColor(White); 00199 if ((ADC1ConvertedVoltage > 2500) || (ADC1ConvertedVoltage < 1500)) 00200 { 00201 LCD_SetTextColor(Red); 00202 } 00203 else 00204 { 00205 LCD_SetTextColor(Blue); 00206 } 00207 00208 v=(ADC1ConvertedVoltage)/1000; 00209 00210 mv = (ADC1ConvertedVoltage%1000)/100; 00211 00212 sprintf((char*)text," V(RV3) = %d,%d V ",v,mv); 00213 LCD_DisplayStringLine(LINE(8),text); 00214 } 00215 00216 /** 00217 * @brief Display Init (LCD) 00218 * @param None 00219 * @retval None 00220 */ 00221 static void Display_Init(void) 00222 { 00223 /* Initialize the LCD */ 00224 #ifdef USE_STM320518_EVAL 00225 STM320518_LCD_Init(); 00226 #elif defined (USE_STM32072B_EVAL) 00227 STM32072B_LCD_Init(); 00228 #endif /* USE_STM320518_EVAL */ 00229 00230 /* Clear the LCD */ 00231 LCD_Clear(White); 00232 00233 /* Set the LCD Text size */ 00234 LCD_SetFont(&Font8x12); 00235 00236 /* Set the LCD Back Color and Text Color*/ 00237 LCD_SetBackColor(Blue); 00238 LCD_SetTextColor(White); 00239 00240 /* Display */ 00241 LCD_DisplayStringLine(LINE(0x13), " ADC Analog Watchdog example "); 00242 00243 /* Set the LCD Text size */ 00244 LCD_SetFont(&Font16x24); 00245 00246 LCD_DisplayStringLine(LINE(0), MESSAGE1); 00247 LCD_DisplayStringLine(LINE(1), MESSAGE2); 00248 00249 /* Set the LCD Back Color and Text Color*/ 00250 LCD_SetBackColor(White); 00251 LCD_SetTextColor(Blue); 00252 00253 /* Display */ 00254 LCD_DisplayStringLine(LINE(3), MESSAGE3); 00255 LCD_DisplayStringLine(LINE(4), MESSAGE4); 00256 00257 /* Set the LCD Text size */ 00258 LCD_SetFont(&Font12x12); 00259 LCD_SetTextColor(Green); 00260 00261 LCD_DisplayStringLine(LINE(12),"AWD High threshold = 2.5 V"); 00262 LCD_DisplayStringLine(LINE(13),"AWD Low threshold = 1.5 V"); 00263 00264 /* Set the LCD Text size */ 00265 LCD_SetFont(&Font16x24); 00266 LCD_SetTextColor(Blue); 00267 } 00268 00269 #ifdef USE_FULL_ASSERT 00270 00271 /** 00272 * @brief Reports the name of the source file and the source line number 00273 * where the assert_param error has occurred. 00274 * @param file: pointer to the source file name 00275 * @param line: assert_param error line source number 00276 * @retval None 00277 */ 00278 void assert_failed(uint8_t* file, uint32_t line) 00279 { 00280 /* User can add his own implementation to report the file name and line number, 00281 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00282 00283 /* Infinite loop */ 00284 while (1) 00285 { 00286 } 00287 } 00288 #endif 00289 00290 /** 00291 * @} 00292 */ 00293 00294 /** 00295 * @} 00296 */ 00297 00298 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/