Disable power-down interupt in SD-logger code (#3481)

conf/airframes/tudelft/easystar3_fw.xml

@@ -8,9 +8,10 @@
 
   <firmware name="fixedwing">
     <configure name="USE_MAGNETOMETER" value="TRUE"/>
+    <define name="USE_BAROMETER" value="TRUE"/>
 
     <target name="ap" board="px4fmu_5.0_chibios">
-      <define name="USE_BARO_BOARD" value="1"/>
+      <define name="USE_BARO_BOARD" value="TRUE"/>
       <configure name="PERIODIC_FREQUENCY" value="120"/>
       <module name="radio_control" type="sbus">
         <configure name="SBUS_PORT" value="UART3"/>
@@ -51,6 +52,7 @@
     </module>
 
     <!-- Logger -->
+    <define name="SDLOG_ENABLE_LOWBAT_FLUSH" value="FALSE"/>
     <module name="tlsf"/>
     <module name="pprzlog"/>
     <module name="logger" type="sd_chibios"/>

conf/modules/logger_sd_chibios.xml

@@ -15,6 +15,7 @@
     <define name="SDLOG_AUTO_FLUSH_PERIOD" value="10" unit="s" description="Data flush period. Shorter period may decrease performances. Default: 10s"/>
     <define name="SDLOG_CONTIGUOUS_STORAGE_MEM" value="50" unit="Mo" description="Try to reserve a given contiguous mass storage memory. Default: 50Mo"/>
     <define name="SDLOG_PREFLIGHT_ERROR" value="FALSE" description="If set to TRUE, the autopilot will not arm if the SDLogger is not running. Default: FALSE"/>
+    <define name="SDLOG_ENABLE_LOWBAT_FLUSH" value="TRUE" description="If set to TRUE or undefined, the autopilot will flush the buffer on detecting low voltage by ADC."/>
   </doc>
    <settings>
     <dl_settings>

sw/airborne/modules/loggers/sdlog_chibios.c

@@ -57,6 +57,12 @@
 #define SDLOG_CONTIGUOUS_STORAGE_MEM 50
 #endif
 
+// Flush file on power loss
+#ifndef SDLOG_ENABLE_LOWBAT_FLUSH
+#define SDLOG_ENABLE_LOWBAT_FLUSH TRUE
+#endif
+
+
 #if (!defined USE_ADC_WATCHDOG) || (USE_ADC_WATCHDOG == 0)
 #error sdlog_chibios need USE_ADC_WATCHDOG in order to properly close files when power is unplugged
 #endif
@@ -233,6 +239,7 @@ void sdlog_chibios_finish(const bool flush)
 /*
  * Bat survey thread
  */
+#if SDLOG_ENABLE_LOWBAT_FLUSH
 static THD_WORKING_AREA(wa_thd_bat_survey, 1024);
 static __attribute__((noreturn)) void thd_bat_survey(void *arg);
 static void  powerOutageIsr(void);
@@ -242,6 +249,7 @@ event_listener_t powerOutageListener;
 #define DefaultAdcOfVoltage(voltage) ((uint32_t) (voltage/(DefaultVoltageOfAdc(1))))
 static const uint16_t V_ALERT = DefaultAdcOfVoltage(5.5f);
 
+
 /*
   powerOutageIsr is called within a lock zone from an isr, so no lock/unlock is needed
 */
@@ -277,6 +285,7 @@ static void thd_bat_survey(void *arg)
   chThdExit(0);
   while (true); // never goes here, only to avoid compiler  warning: 'noreturn' function does return
 }
+#endif // SDLOG_ENABLE_LOWBAT_FLUSH
 #endif
 
 static void thd_startlog(void *arg)
@@ -320,7 +329,7 @@ static void thd_startlog(void *arg)
   }
 
   if (sdOk) {
-#if defined(SDLOG_BAT_ADC) && defined(SDLOG_BAT_CHAN)
+#if defined(SDLOG_BAT_ADC) && defined(SDLOG_BAT_CHAN) && SDLOG_ENABLE_LOWBAT_FLUSH
     // Create Battery Survey Thread with event
     chEvtObjectInit(&powerOutageSource);
     chThdCreateStatic(wa_thd_bat_survey, sizeof(wa_thd_bat_survey),