Quarter step

[jaimelaborda]

Hi all,

Do this library support quarter encoder step?

Will be really handly to support this, as the library is really compact and lightweight.

Thakns for supporting!

[voneiden]

Why do you need quarter steps? The state machine works as intended as long as there's one sub step between the emitted steps. The sub step acts as a debouncer and therefore without a sub step, your output will be noisy.

[chris-elfpen]

I have this optical rotary encoder: https://www.alliedelec.com/grayhill-61c11-01-08-02/70217116/
It has clicks, and gives me one count for every two clicks when turning slowly.

[chris-elfpen]

This worked for me:

#ifdef ONE_STEP
// one-to-one state transition - ignore disallowed transitions
const unsigned char ttable[4][4] = {
// 00 01 10 11
{0x00, 0x01 | DIR_CCW, 0x02 | DIR_CW, 0x00 },
{0x00 | DIR_CW, 0x01, 0x01, 0x03 | DIR_CCW },
{0x00 | DIR_CCW, 0x02, 0x02, 0x03 | DIR_CW },
{0x03, 0x01 | DIR_CW, 0x02 | DIR_CCW, 0x03 }
};

#elif HALF_STEP

(edited: had my CWs and CCWs swapped)