merge #437

esp32.cpp

@@ -0,0 +1,39 @@
+#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