esp32.cpp

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#ifdef ESP32
 
// This file contains functions specific to the ESP32.
 
#include "IRremote.h"
 
// "Idiot check"
#ifdef USE_DEFAULT_ENABLE_IR_IN
#error Must undef USE_DEFAULT_ENABLE_IR_IN
#endif
 
hw_timer_t *timer;
IRAM_ATTR void IRTimer(); // defined in IRremote.cpp, masqueraded as ISR(TIMER_INTR_NAME)
 
//+=============================================================================
// initialization
//
void IRrecv::enableIRIn() {
// Interrupt Service Routine - Fires every 50uS
    // ESP32 has a proper API to setup timers, no weird chip macros needed
    // simply call the readable API versions :)
    // 3 timers, choose #1, 80 divider nanosecond precision, 1 to count up
    timer = timerBegin(1, 80, 1);
    timerAttachInterrupt(timer, &IRTimer, 1);
    // every 50ns, autoreload = true
    timerAlarmWrite(timer, 50, true);
    timerAlarmEnable(timer);
 
    // Initialize state machine variables
    irparams.rcvstate = IR_REC_STATE_IDLE;
    irparams.rawlen = 0;
 
    // Set pin modes
    pinMode(irparams.recvpin, INPUT);
}
 
void IRrecv::disableIRIn() {
    timerEnd(timer);
    timerDetachInterrupt(timer);
}
 
void IRsend::enableIROut(int khz) {
    ledcSetup(LEDCHANNEL, khz * 1000, 8);  // 8 bit PWM resolution
    ledcAttachPin(IR_SEND_PIN, LEDCHANNEL); // bind pin to channel
}
 
#endif // ESP32