Serial.I wasn't familiar with the chipKIT Pi, had to go look it up. Low Performance: neither pin has interrupt capability Good Performance: only the first pin has interrupt capability Best Performance: both pins have interrupt capability Change these pin numbers to the pins connected to your encoder.

* This example code is in the public domain. This examples program is available from the menu: File > Examples > Encoder > TwoKnobs. The library updates its count at each change, which is often called 4X counting, since 4 counts are available for each physical mark or hole in the encoder hardware. The Encoder library monitors the 2 pins and updates a count of the relative change in position. This scheme is called 'quadrature encoding' because the wave forms detected by the 2 pins are 90 degrees out of phase. When it spins counterclockwise, pin 2 is first to detect changes. When the blue disc in the diagram below spins clockwise, the changes are first detected by pin 1, and then by pin 2. UNDERSTANDING QUADRATURE ENCODED SINGNALSĮncoders can sense movement in either direction, by detecting holes or marks as they move past 2 positions. Set the accumulated position to a new number.

Encoder will also work in low performance polling mode if neither pin has interrupts. If both pins have interrupt capability, both will be used for best performance. The first pin should be capable of interrupts. You may create mulitple Encoder objects, where each uses its own 2 pins. BASIC USAGE Encoder myEnc(pin1, pin2) Ĭreate an Encoder object, using 2 pins. If you connect lengthy wires, adding 1K pullup resistors may provide a better signal. Encoder will activate the on-chip pullup resistors. Low cost encoders only connect their pins to ground. Low Performance: Both signals connect to non-interrupt pins, details below.Good Performance: First signal connects to an interrupt pin, second to a non-interrupt pin.Best Performance: Both signals connect to interrupt pins.Encoders have 2 signals, which must be connected to 2 pins. Download: Encoder.zip (version 1.2) Encoder provides 4X counting mode and highly optimized code ( explained below) when running on Teensy or Arduino boards. Encoder counts pulses from quadrature encoded signals, which are commonly available from rotary knobs, motor or shaft sensors and other position sensors.

Mpide wire library