airspeed_ets module

Airspeed ETS (I2C).

Driver for the EagleTree Systems Airspeed Sensor. Has only been tested with V3 of the sensor hardware.

Notes: Connect directly to TWOG/Tiny/Lisa I2C port. Multiple sensors can be chained together. Sensor may be in the proprietary mode (default) or in 3rd-party mode. In 3rd-party mode you must define AIRSPEED_ETS_3RD_PARTY_MODE. A eLogger is needed to set sensor to 3rd-party mode, which is supposed to be more reliable than the default mode.

Sensor module wire assignments:

• Red wire: 5V
• White wire: Ground
• Yellow wire: SDA
• Brown wire: SCL

Example for airframe file

Add to your firmware section: This example contains all possible configuration options, not all of them are mandatory!

<module name="airspeed_ets">
  b'<define name="AIRSPEED_ETS_OFFSET" value="offset" />\n    '
  b'<define name="AIRSPEED_ETS_SCALE" value="scale" />\n    '
  b'<define name="AIRSPEED_ETS_START_DELAY" value="delay" />\n    '
  b'<define name="USE_AIRSPEED_ETS" value="TRUE|FALSE" />\n    '
  b'<define name="AIRSPEED_ETS_3RD_PARTY_MODE" />\n    '
  b'<define name="AIRSPEED_ETS_SDLOG" value="TRUE|FALSE" />\n  '
  b'<configure name="AIRSPEED_ETS_I2C_DEV" value="i2cX" />\n    '
</module>

Module configuration options

Configure Options

• name: AIRSPEED_ETS_I2C_DEV value: i2cX
  Description: set i2c peripheral (default: i2c0)

Define Options

• name: AIRSPEED_ETS_OFFSET value: offset
  Description: sensor reading offset for sensor in proprietary mode (default: 0)
• name: AIRSPEED_ETS_SCALE value: scale
  Description: sensor scale factor for sensor in proprietary mode (default: 1.8)
• name: AIRSPEED_ETS_START_DELAY value: delay
  Description: set initial start delay in seconds
• name: USE_AIRSPEED_ETS value: TRUE|FALSE
  Description: set airspeed in state interface
• name: AIRSPEED_ETS_3RD_PARTY_MODE value: None
  Description: read raw value for sensor in third-party mode
• name: AIRSPEED_ETS_SDLOG value: TRUE|FALSE
  Description: start logging to SD card

Module functions

Init Functions

These initialization functions are called once on startup.

• airspeed_ets_init()

Event Functions

These event functions are called in each cycle of the module event loop.

• AirspeedEtsEvent()

Periodic Functions

These functions are called periodically at the specified frequency from the module periodic loop.

• airspeed_ets_read_periodic()
  • Frequency in Hz: 10.
  • Autorun: LOCK
    Periodic function automatically starts after init and can't be stopped.

Files

Header Files

The following headers are automatically included in modules.h

• airspeed_ets.h

Source Files

• modules/sensors/airspeed_ets.c

Raw airspeed_ets.xml file:

<!DOCTYPE module SYSTEM "module.dtd">
 
<module name="airspeed_ets" dir="sensors" task="sensors">
  <doc>
    <description>
      Airspeed ETS (I2C).
      Driver for the EagleTree Systems Airspeed Sensor.
      Has only been tested with V3 of the sensor hardware.
 
      Notes:
      Connect directly to TWOG/Tiny/Lisa I2C port. Multiple sensors can be chained together.
      Sensor may be in the proprietary mode (default) or in 3rd-party mode. In 3rd-party mode you must define AIRSPEED_ETS_3RD_PARTY_MODE.
      A eLogger is needed to set sensor to 3rd-party mode, which is supposed to be more reliable than the default mode.
 
      Sensor module wire assignments:
      - Red wire: 5V
      - White wire: Ground
      - Yellow wire: SDA
      - Brown wire: SCL
    </description>
    <configure name="AIRSPEED_ETS_I2C_DEV" value="i2cX" description="set i2c peripheral (default: i2c0)"/>
    <define name="AIRSPEED_ETS_OFFSET" value="offset" description="sensor reading offset for sensor in proprietary mode (default: 0)"/>
    <define name="AIRSPEED_ETS_SCALE" value="scale" description="sensor scale factor for sensor in proprietary mode  (default: 1.8)"/>
    <define name="AIRSPEED_ETS_START_DELAY" value="delay" description="set initial start delay in seconds"/>
    <define name="USE_AIRSPEED_ETS" value="TRUE|FALSE" description="set airspeed in state interface"/>
    <define name="AIRSPEED_ETS_3RD_PARTY_MODE"  description="read raw value for sensor in third-party mode"/>
    <define name="AIRSPEED_ETS_SDLOG" value="TRUE|FALSE" description="start logging to SD card"/>
  </doc>
  <dep>
    <depends>i2c</depends>
    <provides>airspeed</provides>
  </dep>
 
  <header>
    <file name="airspeed_ets.h"/>
  </header>
  <init fun="airspeed_ets_init()"/>
  <periodic fun="airspeed_ets_read_periodic()" freq="10."/>
  <event fun="AirspeedEtsEvent()"/>
 
  <makefile>
    <configure name="AIRSPEED_ETS_I2C_DEV" default="i2c0" case="upper|lower"/>
    <define name="USE_$(AIRSPEED_ETS_I2C_DEV_UPPER)"/>
    <define name="AIRSPEED_ETS_I2C_DEV" value="$(AIRSPEED_ETS_I2C_DEV_LOWER)"/>
    <file name="airspeed_ets.c"/>
    <test>
      <define name="USE_I2C0"/>
      <define name="USE_AIRSPEED_ETS"/>
      <define name="DOWNLINK_TRANSPORT" value="pprz_tp"/>
      <define name="DOWNLINK_DEVICE" value="uart0"/>
      <define name="USE_UART0"/>
    </test>
  </makefile>
 
</module>