2560 (MEGA) Sensor Functions

ARDUINO → Functions and Variables → 2560 (MEGA) Sensor Functions

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Information

The Arduino MEGA has 16 analog sensor ports and 53 digital sensor ports.

Analog

Sensor Type:	Comments:
No Sensor	No Sensor Attached. Pin is disabled.
Analog	Standard Analog Input (0-1023), no modification to raw value.
Potentiometer	Standard Analog Input (0-1023), no modification to raw value.
Light Sensor	Standard Analog Input (0-1023), no modification to raw value.
Line Follower	Standard Analog Input (0-1023), no modification to raw value.
Gyro Sensor	Support for VEX Gyro Sensor. See documentation here.
Accelerometer	Support for VEX Accelerometer. See documentation here.
Digital In	Use an analog pin as a digital input (not currently supported)
Digital Out	Use an analog pin as a digital output (not currently supported)

Digital

Sensor Type:	Comments:
No Sensor	No Sensor Attached. Pin is disabled.
Touch	Digital Input for touch sensors. (reversed from "Digital In" command)
Quadrature Encoder (Two Pins)	Support for VEX Quadrature Encoder. See documentation here.
LED to Vcc	Pin configured as digital output with reversed logic (for LEDs) (0 = LED on, 1 = LED off)
Digital In	Pin configured as digital input with internal "Pull-Up" resistor enabled.
Digital Out	Pin configured as digital output.
Digital High Inpedance	Pin configured as digital input without the "Pull-Up" resistor enabled.
Sonar [Ping]	Support for Parallax Ping Sonar Sensor (returns distance in cm, mm, inches, raw)
Sonar [SRP-04] (Two Pins)	Support for VEX Robotics Sonar Sensor (returns distance in cm, mm, inches, raw)

SensorType

TSensorTypes SensorType[tSensors sensor]

(TSensorTypes) The SensorType array is used to manually specify what type of sensor is connected to a specific pin. Most users should not have to use this functionality and should use the Motors and Sensor Setup instead. Parameter Explanation Data Type sensor A sensor port or name tSensors SensorType[dgtl3] = sensorTouch; // set digital pin #3 to be of type sensorTouch

SensorValue

word SensorValue[tSensors sensor]

(word) This array value will return and modify the value of the sensor. When a pin is set as an "input" the SensorValue array command will return the value from the sensor attached to that pin. When a pin is set as an "output", the SensorValue array can be written to set the output value of the pin (typically Digital Outs will be set to 0 for Low and 1 for High). Parameter Explanation Data Type sensor A sensor port or name tSensors while(SensorValue[dgtl6] == 0) //Loop while digital pin #6 is low (set to zero) { motor[motor_2] = 63; // Motor pin #2 is run at half (63) power forward motor[motor_3] = 63; // Motor pin #3 is run at half (63) power forward } Writing to digitalOut #pragma config(Sensor, dgtl24, dOut, sensorDigitalOut) //*!!Code automatically generated by 'ROBOTC' configuration wizard  !!*// task main() { while(true) // infinite loop to keep the program running { SensorValue[dOut] = 1; // set the value of 'dOut' to 1 wait1Msec(1000); // wait 1 second SensorValue[dOut] = 0; // set the value of 'dOut' to 0 wait1Msec(1000); // wait 1 second } } Reading from digitalIn #pragma config(Sensor, dgtl25, dIn, sensorDigitalIn) //*!!Code automatically generated by 'ROBOTC' configuration wizard  !!*// task main() { int incomingSensor; // create int variable, 'incomingSensor' while(true) // infinite loop to keep the program running { incomingSensor = SensorValue[dIn]; // set the value of 'incomingSensor' to the value of 'dIn' } }