stop, standby mode with ADC

[np1]

Posted on April 10, 2015 at 06:49

Hi all,

When I using ADC it work correctly, but when I want MCU enter STOP(or standby) mode and wakup by external interrupt, ADC is hang, can not convert ADC./**  ******************************************************************************  * @file    PWR_STOP/main.c   * @author  MCD Application Team  * @version V1.1.0  * @date    20-September-2012  * @brief   Main program body  ******************************************************************************  * @attention  *  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>  *  * Licensed under MCD-ST Liberty SW License Agreement V2, (the ''License'');  * You may not use this file except in compliance with the License.  * You may obtain a copy of the License at:  *  *        http://www.st.com/software_license_agreement_liberty_v2  *  * Unless required by applicable law or agreed to in writing, software   * distributed under the License is distributed on an ''AS IS'' BASIS,   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  * See the License for the specific language governing permissions and  * limitations under the License.  *  ******************************************************************************  */ /* Includes ------------------------------------------------------------------*/#include ''main.h''/** @addtogroup STM32F3_Discovery_Peripheral_Examples  * @{  *//** @addtogroup PWR_STOP  * @{  */   #if 1/* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*/RTC_TimeTypeDef   RTC_TimeStructure;RTC_InitTypeDef   RTC_InitStructure;RTC_AlarmTypeDef  RTC_AlarmStructure;EXTI_InitTypeDef EXTI_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;__IO uint32_t TimingDelay;/* Private function prototypes -----------------------------------------------*/void Delay(__IO uint32_t nTime);__IO uint16_t  ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0, calibration_value = 0;__IO uint32_t TimingDelay = 0;ADC_InitTypeDef       ADC_InitStructure;ADC_CommonInitTypeDef ADC_CommonInitStructure;GPIO_InitTypeDef      GPIO_InitStructure;/* Private functions ---------------------------------------------------------*/int main(void){  /*!< At this stage the microcontroller clock setting is already configured,        this is done through SystemInit() function which is called from startup       file (startup_stm32f30x.s) before to branch to application main.       To reconfigure the default setting of SystemInit() function, refer to       system_stm32f30x.c file     */   /* Configure the ADC clock */  RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div2);    /* Enable ADC1 clock */  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);        /* Setup SysTick Timer for 1 µsec interrupts  */  if (SysTick_Config(SystemCoreClock / 1000000))  {     /* Capture error */     while (1)    {}  }  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);   /* Configures the USER button */  STM_EVAL_PBInit(BUTTON_USER,BUTTON_MODE_EXTI);  /* ADC Channel configuration */  /* GPIOC Periph clock enable */  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);  /* Configure ADC Channel7 as analog input */  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;  GPIO_Init(GPIOC, &GPIO_InitStructure);    ADC_StructInit(&ADC_InitStructure);  /* Calibration procedure */    ADC_VoltageRegulatorCmd(ADC1, ENABLE);    /* Insert delay equal to 10 µs */  Delay(10);    ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single);  ADC_StartCalibration(ADC1);    while(ADC_GetCalibrationStatus(ADC1) != RESET );  calibration_value = ADC_GetCalibrationValue(ADC1);       ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;                                                                      ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;                      ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;               ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_OneShot;                    ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;            ADC_CommonInit(ADC1, &ADC_CommonInitStructure);    ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;   ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;           ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;  ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;     ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;    ADC_InitStructure.ADC_NbrOfRegChannel = 1;  ADC_Init(ADC1, &ADC_InitStructure);    /* ADC1 regular channel7 configuration */   ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 1, ADC_SampleTime_7Cycles5);  /* Enable ADC1 */  ADC_Cmd(ADC1, ENABLE);  /* wait for ADRDY */  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_RDY));  /* Start ADC1 Software Conversion */   ADC_StartConversion(ADC1);         /* Request to enter STOP mode with regulator in low power mode */   // PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);  /* Infinite loop */  while (1)  {    /* Test EOC flag */    while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);        /* Get ADC1 converted data */    ADC1ConvertedValue =ADC_GetConversionValue(ADC1);        /* Compute the voltage */    ADC1ConvertedVoltage = (ADC1ConvertedValue *3300)/0xFFF;      }}Please give me a help.Thanks

[np1]

Posted on April 10, 2015 at 06:50I am using stm32f303