daily_automated

trunk/Arduino/libraries/IRremote/src/nRF5.cpp

@@ -0,0 +1,60 @@
+#if defined (NRF5)  || defined (ARDUINO_ARCH_NRF52840)
+
+// This file contains functions specific to the nRF5.
+// It uses Timer2 so you cannot use the Adafruit_Microbit display driver
+
+#include "IRremote.h"
+
+// "Idiot check"
+#ifdef USE_DEFAULT_ENABLE_IR_IN
+#error Must undef USE_DEFAULT_ENABLE_IR_IN
+#endif
+
+void IRTimer(); // defined in IRremote.cpp, masqueraded as ISR(TIMER_INTR_NAME)
+
+//+=============================================================================
+// initialization
+//
+void IRrecv::enableIRIn() {
+// Interrupt Service Routine - Fires every 50uS
+    NRF_TIMER2->MODE = TIMER_MODE_MODE_Timer;              // Set the timer in Timer Mode
+    NRF_TIMER2->TASKS_CLEAR = 1;                           // clear the task first to be usable for later
+    NRF_TIMER2->PRESCALER = 4;                             // f TIMER = 16 MHz / (2 ^ PRESCALER ) : 4 -> 1 MHz, 1 uS
+    NRF_TIMER2->BITMODE = TIMER_BITMODE_BITMODE_16Bit;     //Set counter to 16 bit resolution
+    NRF_TIMER2->CC[0] = 50;                                //Set value for TIMER2 compare register 0, to trigger every 50 uS
+    NRF_TIMER2->CC[1] = 0;                                 //Set value for TIMER2 compare register 1
+
+    // Enable interrupt on Timer 2, for CC[0] compare match events
+    NRF_TIMER2->INTENSET = (TIMER_INTENSET_COMPARE0_Enabled << TIMER_INTENSET_COMPARE0_Pos);
+    NVIC_EnableIRQ (TIMER2_IRQn);
+
+    NRF_TIMER2->TASKS_START = 1;               // Start TIMER2
+
+    // timerAttachInterrupt(timer, &IRTimer, 1);
+
+    // Initialize state machine variables
+    irparams.rcvstate = IR_REC_STATE_IDLE;
+    irparams.rawlen = 0;
+
+    // Set pin modes
+    pinMode(irparams.recvpin, INPUT);
+}
+
+void timer_pal(void) {
+    if ((NRF_TIMER2->EVENTS_COMPARE[0] != 0) && ((NRF_TIMER2->INTENSET & TIMER_INTENSET_COMPARE0_Msk) != 0)) {
+        NRF_TIMER2->EVENTS_COMPARE[0] = 0;          //Clear compare register 0 event
+        IRTimer();                                  // call the IR-receive function
+        NRF_TIMER2->CC[0] += 50;
+    }
+}
+
+/** TIMTER2 peripheral interrupt handler. This interrupt handler is called whenever there it a TIMER2 interrupt
+ * Don't mess with this line. really.
+ */
+extern "C" {
+void TIMER2_IRQHandler(void) {
+    timer_pal();
+}
+}
+
+#endif // NRF5