From e3897565c342bee4765f921240b7ca91cd9b23f1 Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Mon, 31 Mar 2014 11:18:32 +0200
Subject: Activate accel + timer

---
 accel.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

(limited to 'accel.c')

diff --git a/accel.c b/accel.c
index a178fa3..670121e 100644
--- a/accel.c
+++ b/accel.c
@@ -23,7 +23,6 @@ static volatile int8_t val[6] = {0, 0, 0, 0, 0, 0};
 /* currently reading from i2c */
 static bool reading = false;
 
-#warning "wrong interrupt"
 /* data ready interrupt
  */
 ISR(PCINT1_vect) {
@@ -31,13 +30,13 @@ ISR(PCINT1_vect) {
 }
 
 void accelInit () {
-	/* set PB1 to input, with pull-up */
-	//DDRB = (DDRB & ~((1 << PB1)));
-	//PORTB = (PORTB | (1 << PB1));
-	/* enable interrupt PCI0 */
-	//PCICR = (1 << PCIE0);
-	/* enable interrupts on PB1/PCINT1 */
-	//PCMSK0 = (1 << 1);
+	/* set interrupt lines to input with pull-up */
+	DDRC = DDRC & ~((1 << PC0) | (1 << PC1));
+	PORTC = PORTC | (1 << PC0) | (1 << PC1);
+	/* enable interrupt PCI1 for PCINT8/9 */
+	PCICR = PCICR | (1 << PCIE1);
+	/* enable interrupts from port PC0/PC1 aka PCINT8/PCINT9 */
+	PCMSK1 = (1 << PCINT9) | (1 << PCINT8);
 }
 
 /* XXX: make nonblocking */
@@ -45,9 +44,9 @@ void accelStart () {
 	/* configuration:
 	 * disable power-down-mode
 	 * defaults
-	 * data ready interrupt on int2
+	 * low active, data ready interrupt on int2
 	 */
-	uint8_t data[] = {0b01000111, 0b0, 0b00100000};
+	uint8_t data[] = {0b01000111, 0b0, 0b10100000};
 
 	if (!twRequest (TWM_WRITE, LIS302DL, LIS302DL_CTRLREG1, data,
 			sizeof (data)/sizeof (*data))) {
@@ -64,11 +63,11 @@ bool accelProcess () {
 			reading = false;
 			return true;
 		} else if (twr.status == TWST_ERR) {
-			printf ("accel i2c error\n");
+			printf ("accel i2c error %x at step %i\n", twr.error, twr.step);
 			reading = false;
 		}
 	} else {
-		if (drdy && twr.status != TWST_WAIT) {
+		if (/*drdy &&*/ twr.status != TWST_WAIT) {
 			/* new data available in device buffer and bus is free, we are
 			 * reading the registers inbetween out_x/y/z and ignore them */
 			if (!twRequest (TWM_READ, LIS302DL, LIS302DL_UNUSED1, (uint8_t *) val, 6)) {
@@ -83,3 +82,7 @@ bool accelProcess () {
 	return false;
 }
 
+volatile const int8_t *accelGet () {
+	return val;
+}
+
-- 
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