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HAL_PX4: support voltage monitoring on multi-connector pin 5

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This commit is contained in:
Andrew Tridgell 2013-06-05 08:24:20 +10:00
parent 8703d39475
commit d7d87f827e
2 changed files with 8 additions and 0 deletions
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7
libraries/AP_HAL_PX4/AnalogIn.cpp
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@ -19,6 +19,10 @@
// for a range of known inputs from 1.3V to 5.0V
#define PX4_AIRSPEED_VOLTAGE_SCALING (6.76f/4096.0f)
// the FMU battery mon port has some additional scaling to make it
// safe for up to 18.68V.
#define PX4_FMU_BATTERY_VOLTAGE_SCALING (18.68f/4096.0f)
// pin4 in the SPI port is analog input 13, marked as analog3 on the
// PX4IO schematic v1.3, and is scaled quite strangely
#define PX4_ANALOG3_VOLTAGE_SCALING (16.88f/4096.0f)
@ -73,6 +77,9 @@ float PX4AnalogSource::read_latest()
*/
float PX4AnalogSource::voltage_average()
{
if (_pin == PX4_ANALOG_FMU_BATTERY) {
return PX4_FMU_BATTERY_VOLTAGE_SCALING * read_average();
}
if (_pin == PX4_ANALOG_AIRSPEED_PIN) {
return PX4_AIRSPEED_VOLTAGE_SCALING * read_average();
}

1
libraries/AP_HAL_PX4/AnalogIn.h
View File

@ -14,6 +14,7 @@
#define PX4_ANALOG_BATTERY_VOLTAGE_PIN 100
#define PX4_ANALOG_BATTERY_CURRENT_PIN 101
#define PX4_ANALOG_FMU_BATTERY 10 // on multi-connector pin 5
#define PX4_ANALOG_AIRSPEED_PIN 11
#define PX4_ANALOG_ANALOG2_PIN 12 // on SPI port pin 3
#define PX4_ANALOG_ANALOG3_PIN 13 // on SPI port pin 4