ltran0325 / msp432-rotary-optical-encoder

A rotary optical encoder is programmed on the MSP432 launchpad. The angle of the encoder is counted using hardware interrupts and then displayed on a 7-segment display.

MSP432-Rotary-Optical-Encoder

Demo:

https://youtu.be/wDcu66NudCA

Encoder Operation:

Source: Operating principle of the optical incremental encoder - Sang-Hoon Kim.

Operation:

• When a rising edge of Phase A is detected while phase B is high, negative angle rotation.

• When a rising edge of Phase A is detected while phase B is low, positive angle rotation.

• Phase A and B are connected to MSP432 as GPIO input.

Setup:

Red LED on left of 7-segment display for encoder angle polarity (ON for negative).

• CW is positive count direction.
• CCW is negative count direction.