Fix ADC Watchdog handling

stm-firmware/adc-meas.c

@@ -36,6 +36,7 @@ static volatile int * volatile streaming_flag_ptr = NULL;
 static uint32_t filter_startup_cnt;
 static volatile float adc_pt1000_raw_reading_hf;
 static volatile uint16_t dma_sample_buffer[ADC_PT1000_DMA_AVG_SAMPLES];
+static volatile uint32_t adc_watchdog_counter = 0UL;
 
 volatile float * volatile stream_buffer = NULL;
 volatile uint32_t stream_count;
@@ -322,7 +323,6 @@ 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;
 
@@ -331,16 +331,12 @@ 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;
-		watchdog_errors++;
-		if (watchdog_errors >= ADC_PT1000_WATCHDOG_SAMPLE_COUNT)
+		adc_watchdog_counter++;
+		if (adc_watchdog_counter >= ADC_PT1000_WATCHDOG_SAMPLE_COUNT)
 			pt1000_error |= ADC_PT1000_WATCHDOG_ERROR;
 	}
 }
@@ -376,6 +372,9 @@ void DMA2_Stream0_IRQHandler()
 		if (streaming_flag_ptr)
 			append_stream_buffer(adc_val);
 
+		if (adc_watchdog_counter > 0UL)
+			adc_watchdog_counter--;
+
 		/* Call moving average filter */
 		adc_pt1000_filter(adc_val);
 	}

stm-firmware/include/reflow-controller/adc-meas.h

@@ -63,7 +63,7 @@
  * @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
+#define ADC_PT1000_WATCHDOG_SAMPLE_COUNT 25U
 
 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)};
 

stm-firmware/shell.c

@@ -274,8 +274,11 @@ static shellmatta_retCode_t shell_cmd_pt1000_res_loop(const shellmatta_handle_t
 			shellmatta_printf(handle, "\x1b[1A\x1b[150D\x1b[K");
 		shell_cmd_pt1000_res(handle, "", 0UL);
 
-		led_set(0, led_status);
-		led_set(1, !led_status);
+		led_set(1, led_status);
+		if (adc_pt1000_check_error() & ADC_PT1000_WATCHDOG_ERROR) {
+			led_set(0, 1);
+		}
+
 		led_status ^= 0x1;
 
 		systick_wait_ms(150);