void adc_init_analog_watchdog (void)
{
NVIC_InitTypeDef NVIC_InitStructure;
//Set up interruts
ADC_ITConfig(ADC1, ADC_IT_AWD, ENABLE);
// [..] A typical configuration Analog Watchdog is done following these steps :
// (#) the ADC guarded channel(s) is (are) selected using the
// ADC_AnalogWatchdogSingleChannelConfig() function.
//Setup single channel function for ADC Channel 4, ADC_BATT_I
ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_AnalogWatchdog_Channel_4);
// (#) The Analog watchdog lower and higher threshold are configured using the
// ADC_AnalogWatchdogThresholdsConfig() function.
ADC_AnalogWatchdogThresholdsConfig(ADC1, I_BATT_TO_ADC(0.1), I_BATT_TO_ADC(0) );
// (#) The Analog watchdog is enabled and configured to enable the check, on one
// or more channels, using the ADC_AnalogWatchdogCmd() function.
ADC_AnalogWatchdogCmd(ADC1, ENABLE);
// (#) Enable the analog watchdog on the selected channel using
// ADC_AnalogWatchdogSingleChannelCmd() function
ADC_AnalogWatchdogSingleChannelCmd(ADC1, ENABLE);
/* Enable and set ADC1_COMP Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = ADC1_COMP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief ADC1 channel configuration
* @param None
* @retval None
*/
static void ADC_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* GPIOC Periph clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
/* ADC1 Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* Configure ADC Channel11 as analog input */
#ifdef USE_STM320518_EVAL
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
#elif defined (USE_STM32072B_EVAL)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ;
#endif /* USE_STM320518_EVAL */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* ADC1 DeInit */
ADC_DeInit(ADC1);
/* Initialize ADC structure */
ADC_StructInit(&ADC_InitStructure);
/* Configure the ADC1 in continuous mode withe a resolution equal to 12 bits */
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
ADC_Init(ADC1, &ADC_InitStructure);
/* Convert the ADC1 Channel11 and channel10 with 239.5 Cycles as sampling time */
#ifdef USE_STM320518_EVAL
ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_239_5Cycles);
#elif defined (USE_STM32072B_EVAL)
ADC_ChannelConfig(ADC1, ADC_Channel_10 , ADC_SampleTime_239_5Cycles);
#endif /* USE_STM320518_EVAL */
/* Analog watchdog config ******************************************/
/* Configure the ADC Thresholds between 1.5V and 2.5V (1861, 3102) */
ADC_AnalogWatchdogThresholdsConfig(ADC1, 3102, 1861);
/* Enable the ADC1 single channel */
ADC_AnalogWatchdogSingleChannelCmd(ADC1, ENABLE);
ADC_OverrunModeCmd(ADC1, ENABLE);
/* Enable the ADC1 analog watchdog */
ADC_AnalogWatchdogCmd(ADC1,ENABLE);
/* Select a single ADC1 channel 11 */
#ifdef USE_STM320518_EVAL
ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_AnalogWatchdog_Channel_11);
#elif defined (USE_STM32072B_EVAL)
ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_AnalogWatchdog_Channel_10);
#endif /* USE_STM320518_EVAL */
/* Enable AWD interrupt */
ADC_ITConfig(ADC1, ADC_IT_AWD, ENABLE);
/* Configure and enable ADC1 interrupt */
NVIC_InitStructure.NVIC_IRQChannel = ADC1_COMP_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the ADC1 Calibration */
ADC_GetCalibrationFactor(ADC1);
/* Enable the ADC peripheral */
ADC_Cmd(ADC1, ENABLE);
/* Wait the ADRDY flag */
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));
/* ADC1 regular Software Start Conv */
ADC_StartOfConversion(ADC1);
}
