From: Robin Krens <robin@robinkrens.nl>
Date: Wed, 18 May 2022 22:29:43 +0000 (+0200)
Subject: hbc: interrupt stubs
X-Git-Url: https://robinkrens.nl/gitweb/?p=lra-as-sensor;a=commitdiff_plain;h=b24e7613a4cca474c0d9c101ddbc7ec885a08d59

hbc: interrupt stubs
---

diff --git a/haptic.c b/haptic.c
index 73a87d3..727c3b2 100644
--- a/haptic.c
+++ b/haptic.c
@@ -5,12 +5,13 @@
 
 void set_lra_as_sensor(void)
 {
-
+	/* enable interrupt routine and 
+	 * set correct PINs */	
 }
 
 void set_lra_as_actuator(void)
 {
-
+	/* set correct PINs */
 }
 
 /* play random haptic effect on lra
diff --git a/hbc.c b/hbc.c
index a0e77e0..c5749cc 100644
--- a/hbc.c
+++ b/hbc.c
@@ -8,7 +8,15 @@
 #include <util/delay.h>
 #include "haptic.h"
 
-/* wake up on interrupt */
+/* idle mode will wake up board and will
+ * return PC after latest sleep_mode() call */
+EMPTY_INTERRUPT(SIG_COMPARATOR);
+
+/* for debugging purposes */
+ISR(BADISR_vect) 
+{
+}
+
 static void switch_idle(void)
 {
 	sei();
@@ -29,16 +37,20 @@ int main(void)
 {
 	
 	init_board();	
-	DDRB |= (1 << DDB3);
-	PORTB = (1 << PB3);
 
 	while(1) {
-		_delay_ms(2);
-		PORTB = 0;
-		_delay_ms(2);
-		PORTB = (1 << PB3);
-	}
 
-	return 0;
+		/* set LRA as sensor and switch to idle mode
+		 * check back-EMF of LRA: if treshold is surpassed
+		 * comparator intterupt is triggered */
+		set_lra_as_sensor();
+		switch_idle(); 
+
+		/* board wakes up, set LRA as actuator and
+		 * plays haptic effect */
+		set_lra_as_actuator();
+		play_haptic();
+
+	}
 
 }