API for the Rotary Angle Sensor (Knob) More...

Detailed Description

ID: rotary
Name: Rotary Angle Sensor
Other Names: Rotary Potentiometer, Grove Rotary Angle Sensor
Category: ainput
Manufacturer: seeed
Link: http://wiki.seeed.cc/Grove-Rotary_Angle_Sensor/
Connection: analog
Kit: gsk

Basic UPM module for the rotary angle sensor (knob) on analog. Provides a set of functions to read the absolute pin value, degrees or radians, and another set to do the same relative to the center of the knob's range.

    // Instantiate a rotary sensor on analog pin A0
    upm::Rotary* knob = new upm::Rotary(0);
    // Print sensor name to confirm it initialized properly
    cout << knob->name() << endl;
    while(true) {
        float abs_value = knob->abs_value(); // Absolute raw value
        float abs_deg = knob->abs_deg();     // Absolute degrees
        float abs_rad = knob->abs_rad();     // Absolute radians
        float rel_value = knob->rel_value(); // Relative raw value
        float rel_deg = knob->rel_deg();     // Relative degrees
        float rel_rad = knob->rel_rad();     // Relative radians
        fprintf(stdout, "Absolute: %4d raw %5.2f deg = %3.2f rad Relative: %4d raw %5.2f deg %3.2f rad\n",
                (int16_t)abs_value, abs_deg, abs_rad, (int16_t)rel_value, rel_deg, rel_rad);
        usleep(2500000); // Sleep for 2.5s
    }

Public Member Functions
	Rotary (unsigned int pin)

	~Rotary ()

float	abs_value ()

float	abs_deg ()

float	abs_rad ()

float	rel_value ()

float	rel_deg ()

float	rel_rad ()

std::string	name ()