Manual

Copyright © Dr Robot Inc. 2008
12
Where 90DegreeGValue and ZeroGValue are module-specific values that can be measured
by experiment:
1. Place the sensor level, so that the gravity vector is perpendicular to the measured
sensor axis
2. Take the measurement and this value would be the ZeroGValue
3. Rotate the sensor so that the gravity vector is parallel with the measured axis
4. Take the measurement and this value would be the 90DegreeGValue
5. Repeat this step for the other direction
Typical value of ZeroGValue is about 2048 and abs(90DegreeGValue-ZeroGValue) is
about 1250.
III.1.5. Temperature Sensors
31 short GetSensorOverheatAD1 ();
32 short GetSensorOverheatAD2 ();
Description:
GetSensorOverheatADX returns the current air temperature values near the relevant DC
motor drive modules (MDM5253), which could be used for monitoring whether the motor
drivers are overheating or not. This situation usually occurs if the motor currents are kept
high (but still lower than the current limit of the motor driver module) for significant amount
of time, which may result from some unfavorable inner or external system conditions and is
not recommended for regular system operations.
Syntax: ival = GetSensorOverheatAD1(); //1
st
overheating sensor
ival = GetSensorOverheatAD2(); //2
nd
overheating sensor
Parameter: void
Return value: short ival;
Return data interpretation:
The return data is the raw value of the analog to digital converter indicating the output
voltage of the sensor. The data range of the return value is between 0 and 4095. The
output voltage of the sensor can be calculated from the following equation:
Temperature (˚C) = 100- (ival – 980) / 11.6
33 short GetSensorTemperature ();
Description:
GetSensorTemperature returns the current temperature value from DAT5280 Ambient
Temperature Sensor Module.
Syntax: ival = GetSensorTemperature ();