Class mRotaryEncoder for mechanical incremental rotary encoders with pushbuttons. Use debouncing and callback-functions for rotation and pressing of button. This version is for old mbed. New version for mbed-os see https://os.mbed.com/users/charly/code/mRotaryEncoder-os/
Dependents: SimplePIDBot FinalProgram VS1053Player SPK-DVIMXR ... more
mRotaryEncoder.cpp
- Committer:
- charly
- Date:
- 2015-12-20
- Revision:
- 9:36f7abb289c6
- Parent:
- 7:ec80fd9c0c08
- Child:
- 10:2502b829d452
File content as of revision 9:36f7abb289c6:
#include "mbed.h" #include "mRotaryEncoder.h" mRotaryEncoder::mRotaryEncoder(PinName pinA, PinName pinB, PinName pinSW, PinMode pullMode, int debounceTime_us) { m_pinA = new PinDetect(pinA); // interrrupts on pinA m_pinB = new DigitalIn(pinB); // only digitalIn for pinB //set pins with internal PullUP-default m_pinA->mode(pullMode); m_pinB->mode(pullMode); // attach interrrupts on pinA m_pinA->attach_asserted(this, &mRotaryEncoder::rise); m_pinA->attach_deasserted(this, &mRotaryEncoder::fall); //start sampling pinA m_pinA->setSampleFrequency(debounceTime_us); // Start timers an Defaults debounce time. // Switch on pinSW m_pinSW = new PinDetect(pinSW); // interrupt on press switch m_pinSW->mode(pullMode); m_pinSW->setSampleFrequency(debounceTime_us); // Start timers an Defaults debounce time. m_position = 0; m_debounceTime_us = debounceTime_us; } mRotaryEncoder::~mRotaryEncoder() { delete m_pinA; delete m_pinB; delete m_pinSW; } int mRotaryEncoder::Get(void) { return m_position; } void mRotaryEncoder::Set(int value) { m_position = value; } void mRotaryEncoder::fall(void) { // debouncing does PinDetect for us //pinA still low? if (*m_pinA == 0) { if (*m_pinB == 1) { m_position++; rotCWIsr.call(); } else { m_position--; rotCCWIsr.call(); } } rotIsr.call(); // call the isr for rotation } void mRotaryEncoder::rise(void) { //PinDetect does debouncing //pinA still high? if (*m_pinA == 1) { if (*m_pinB == 1) { m_position--; rotCCWIsr.call(); } else { m_position++; rotCWIsr.call(); } } rotIsr.call(); // call the isr for rotation }