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reflow-oven-control-sw
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ADC Measurment: Introduce ADC_PT1000_WATCHDOG_SAMPLE_COUNT in order to filter out false Watchdog errors produces by EMI problems"

This commit is contained in:
Mario Hüttel 2020-04-26 18:09:39 +02:00
parent b9a38549dc
commit ffe195d7b2
2 changed files with 14 additions and 1 deletions
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9
stm-firmware/adc-meas.c
View File

@ -322,6 +322,7 @@ static inline __attribute__((optimize("O3"))) float adc_pt1000_dma_avg_pre_filte
void ADC_IRQHandler(void)
{
uint32_t adc1_sr;
static uint32_t watchdog_errors;
adc1_sr = ADC1->SR;
@ -330,11 +331,17 @@ void ADC_IRQHandler(void)
pt1000_error |= ADC_PT1000_OVERFLOW;
/* Disable ADC in case of overrrun*/
adc_pt1000_disable();
if (!(adc1_sr & ADC_SR_AWD)) {
watchdog_errors = 0;
}
}
if (adc1_sr & ADC_SR_AWD) {
ADC1->SR &= ~ADC_SR_AWD;
pt1000_error |= ADC_PT1000_WATCHDOG_ERROR;
watchdog_errors++;
if (watchdog_errors >= ADC_PT1000_WATCHDOG_SAMPLE_COUNT)
pt1000_error |= ADC_PT1000_WATCHDOG_ERROR;
}
}

6
stm-firmware/include/reflow-controller/adc-meas.h
View File

@ -59,6 +59,12 @@
*/
#define ADC_PT1000_UPPER_WATCHDOG 4000U
/**
* @brief Number of ADC samples the value has to be outside the Watchdog limit (@ref ADC_PT1000_UPPER_WATCHDOG and @ref ADC_PT1000_LOWER_WATCHDOG)
* in order to produce a watchdog error
*/
#define ADC_PT1000_WATCHDOG_SAMPLE_COUNT 10U
enum adc_pt1000_error {ADC_PT1000_NO_ERR= 0, ADC_PT1000_WATCHDOG_ERROR=(1UL<<0), ADC_PT1000_OVERFLOW=(1UL<<1), ADC_PT1000_INACTIVE = (1UL<<2)};
/**