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sensors fix uninitialized diffferential_pressure message

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- fixes coverity CID 260383
This commit is contained in:
Daniel Agar
2018-03-24 12:51:32 -04:00
parent fc829b8519
commit a48e3bf68d
1 changed files with 11 additions and 8 deletions
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src/modules/sensors/sensors.cpp
+11 -8
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@@ -183,6 +183,10 @@ private:
DataValidator _airspeed_validator; /**< data validator to monitor airspeed */
#ifdef ADC_AIRSPEED_VOLTAGE_CHANNEL
differential_pressure_s _diff_pres {};
#endif /* ADC_AIRSPEED_VOLTAGE_CHANNEL */
Battery _battery[BOARD_NUMBER_BRICKS]; /**< Helper lib to publish battery_status topic. */
Parameters _parameters{}; /**< local copies of interesting parameters */
@@ -480,7 +484,7 @@ Sensors::adc_poll()
if (ADC_AIRSPEED_VOLTAGE_CHANNEL == buf_adc[i].am_channel) {
/* calculate airspeed, raw is the difference from */
float voltage = (float)(buf_adc[i].am_data) * 3.3f / 4096.0f * 2.0f; // V_ref/4096 * (voltage divider factor)
const float voltage = (float)(buf_adc[i].am_data) * 3.3f / 4096.0f * 2.0f; // V_ref/4096 * (voltage divider factor)
/**
* The voltage divider pulls the signal down, only act on
@@ -489,17 +493,16 @@ Sensors::adc_poll()
*/
if (voltage > 0.4f && (_parameters.diff_pres_analog_scale > 0.0f)) {
float diff_pres_pa_raw = voltage * _parameters.diff_pres_analog_scale - _parameters.diff_pres_offset_pa;
const float diff_pres_pa_raw = voltage * _parameters.diff_pres_analog_scale - _parameters.diff_pres_offset_pa;
differential_pressure_s diff_pres;
diff_pres.timestamp = t;
diff_pres.differential_pressure_raw_pa = diff_pres_pa_raw;
diff_pres.differential_pressure_filtered_pa = (diff_pres.differential_pressure_filtered_pa * 0.9f) +
_diff_pres.timestamp = t;
_diff_pres.differential_pressure_raw_pa = diff_pres_pa_raw;
_diff_pres.differential_pressure_filtered_pa = (_diff_pres.differential_pressure_filtered_pa * 0.9f) +
(diff_pres_pa_raw * 0.1f);
diff_pres.temperature = -1000.0f;
_diff_pres.temperature = -1000.0f;
int instance;
orb_publish_auto(ORB_ID(differential_pressure), &_diff_pres_pub, &diff_pres, &instance, ORB_PRIO_DEFAULT);
orb_publish_auto(ORB_ID(differential_pressure), &_diff_pres_pub, &_diff_pres, &instance, ORB_PRIO_DEFAULT);
}
} else