esp32.cpp

#ifdef ESP32

// This file contains functions specific to the ESP32.

#include "IRremote.h"
#include "IRremoteInt.h"

// "Idiot check"
#ifdef USE_DEFAULT_ENABLE_IR_IN
#error Must undef USE_DEFAULT_ENABLE_IR_IN
#endif

hw_timer_t *timer;
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 = STATE_IDLE;
	irparams.rawlen = 0;

	// Set pin modes
	pinMode(irparams.recvpin, INPUT);
}

#endif // ESP32