Added ADC Watchdog.

src/apps/LoRaMac/encoder/SKiM980A/main.c

@@ -826,7 +826,7 @@ static void McpsIndication( McpsIndication_t *mcpsIndication )
         case 3:
             // Downlink encoder configuration
             if (mcpsIndication->BufferSize == 3) {
-                 config.analog_alarm = (((uint16_t)mcpsIndication->Buffer[2] << 8) | (uint16_t) mcpsIndication->Buffer[1]);
+                config.analog_alarm = (((uint16_t)mcpsIndication->Buffer[2] << 8) | (uint16_t) mcpsIndication->Buffer[1]);
                 config.digital_alarm = (mcpsIndication->Buffer[0] >> 7) & 0x01;
                 config.sampling = (mcpsIndication->Buffer[0] & 0x0f);
 
@@ -838,6 +838,11 @@ static void McpsIndication( McpsIndication_t *mcpsIndication )
                     printf( "Sampling : %02X\r\n", config.sampling );
                     printf( "Digital alarm enable : %02X\r\n", config.digital_alarm );
                     printf( "Analog alarm lvl. : %04X\r\n\r\n", config.analog_alarm );
+
+                    if (config.analog_alarm > 0)
+                    {
+                        BoardSetADCAlarmLVL(config.analog_alarm);
+                    }                    
                 }
                 // OnTxNextPacketTimerEvent(NULL);
             }

src/boards/SKiM980A/adc-board.c

@@ -23,8 +23,11 @@
 #include "stm32l1xx.h"
 #include "board-config.h"
 #include "adc-board.h"
+#include "board.h"
+#include "encoder.h"
 
 ADC_HandleTypeDef AdcHandle;
+ADC_AnalogWDGConfTypeDef awd;
 
 void AdcMcuInit( Adc_t *obj, PinNames adcInput )
 {
@@ -116,3 +119,38 @@ uint16_t AdcMcuReadChannel( Adc_t *obj, uint32_t channel )
 
     return adcData;
 }
+
+void AdcMcuWatchdog( Adc_t *obj, uint32_t channel, uint32_t high_lvl, uint32_t low_lvl)
+{
+    awd.WatchdogMode = ADC_ANALOGWATCHDOG_SINGLE_REG;      /*!< Configures the ADC analog watchdog mode: single/all channels, regular/injected group.
+                                   This parameter can be a value of @ref ADC_analog_watchdog_mode. */
+    awd.Channel = channel;           /*!< Selects which ADC channel to monitor by analog watchdog.
+                                   This parameter has an effect only if watchdog mode is configured on single channel (parameter WatchdogMode)
+                                   This parameter can be a value of @ref ADC_channels. */
+    awd.ITMode = ENABLE;            /*!< Specifies whether the analog watchdog is configured in interrupt or polling mode.
+                                   This parameter can be set to ENABLE or DISABLE */
+    awd.HighThreshold = high_lvl;     /*!< Configures the ADC analog watchdog High threshold value.
+                                   This parameter must be a number between Min_Data = 0x000 and Max_Data = 0xFFF. */
+    awd.LowThreshold = low_lvl;      /*!< Configures the ADC analog watchdog High threshold value.
+                                   This parameter must be a number between Min_Data = 0x000 and Max_Data = 0xFFF. */
+    awd.WatchdogNumber = 0;    /*!< Reserved for future use, can be set to 0 */
+
+    HAL_ADC_AnalogWDGConfig(&AdcHandle, &awd);
+}
+
+/**
+  * @brief  Analog watchdog callback in non blocking mode. 
+  * @param  hadc: ADC handle
+  * @retval None
+  */
+void HAL_ADC_LevelOutOfWindowCallback(ADC_HandleTypeDef* hadc)
+{
+    CRITICAL_SECTION_BEGIN();
+    if (Encoder.OnSendOneshot != NULL &&  config.analog_alarm > 0)
+    {
+        awd.ITMode = DISABLE; 
+        HAL_ADC_AnalogWDGConfig(&AdcHandle, &awd);
+        Encoder.OnSendOneshot();
+    }
+    CRITICAL_SECTION_END();  
+}

src/boards/SKiM980A/board.c

@@ -656,6 +656,10 @@ void BoardLowPowerHandler( void )
     __enable_irq( );
 }
 
+void BoardSetADCAlarmLVL(uint32_t lower_threshold) 
+{
+    AdcSetWatchdogLVL(&Adc, ADC_CHANNEL_3, lower_threshold );
+}
 /**
   * @brief This function configures the source of the time base.
   * @brief  don't enable systick

src/boards/adc-board.h

@@ -53,4 +53,14 @@ void AdcMcuConfig( void );
  */
 uint16_t AdcMcuReadChannel( Adc_t *obj, uint32_t channel );
 
+/*!
+ * \brief Set AWD the value of the given channel
+ *
+ * \param [IN] obj     ADC object
+ * \param [IN] channel ADC input channel
+ * \param [IN] high_lvl ADC high level threshold
+ * \param [IN] low_lvl ADC low level threshold
+ */
+void AdcMcuWatchdog( Adc_t *obj, uint32_t channel, uint32_t high_lvl, uint32_t low_lvl);
+
 #endif // __ADC_BOARD_H__

src/boards/board.h

@@ -120,4 +120,6 @@ uint8_t GetBoardPowerSource( void );
  */
 Version_t BoardGetVersion( void );
 
+void BoardSetADCAlarmLVL(uint32_t lower_threshold);
+
 #endif // __BOARD_H__

src/boards/encoder-board.h

@@ -30,6 +30,7 @@ typedef enum {
     RATE_30_MIN,
     RATE_60_MIN,
     RATE_90_MIN
+    /* 5 to 15 reserved for default RATE_01_MIN */
 } DUTYCYCLE_RATE ;
 
 // An encoder.c file has to be implmented under system directory.

src/system/adc.c

@@ -56,3 +56,8 @@ uint16_t AdcReadChannel( Adc_t *obj, uint32_t channel )
         return 0;
     }
 }
+
+void AdcSetWatchdogLVL( Adc_t *obj, uint32_t channel, uint32_t lower_threshold )
+{
+    AdcMcuWatchdog( obj, channel, UINT32_MAX,  lower_threshold);
+}

src/system/adc.h

@@ -58,4 +58,6 @@ void AdcDeInit( Adc_t *obj );
  */
 uint16_t AdcReadChannel( Adc_t *obj, uint32_t channel );
 
+void AdcSetWatchdogLVL( Adc_t *obj, uint32_t channel, uint32_t lower_threshold );
+
 #endif // __ADC_H__