From 1d0d6f316707cbaac23b3b0b77b5d554f6e7954d Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Tue, 25 Nov 2014 16:33:49 +0100
Subject: gyro/accel: Disable pull-ups

Not sure they are needed.
---
 accel.c | 11 +++++------
 gyro.c  |  7 +++----
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/accel.c b/accel.c
index 6d6d9d2..ce44c42 100644
--- a/accel.c
+++ b/accel.c
@@ -53,8 +53,8 @@ static bool reading = false;
  */
 ISR(PCINT1_vect) {
 	const bool interrupt = (PINC >> PINC1) & 0x1;
-	/* low-active */
-	if (!interrupt) {
+	/* high-active */
+	if (interrupt) {
 		enableWakeup (WAKE_ACCEL);
 	} else {
 		disableWakeup (WAKE_ACCEL);
@@ -62,9 +62,8 @@ ISR(PCINT1_vect) {
 }
 
 void accelInit () {
-	/* set interrupt lines to input with pull-up */
+	/* set interrupt lines to input */
 	DDRC = DDRC & ~((1 << DDC0) | (1 << DDC1));
-	PORTC = PORTC | (1 << PORTC0) | (1 << PORTC1);
 	/* enable interrupt PCI1 for PCINT8/9 */
 	PCICR = PCICR | (1 << PCIE1);
 	/* enable interrupts from port PC0/PC1 aka PCINT8/PCINT9 */
@@ -76,9 +75,9 @@ void accelStart () {
 	/* configuration:
 	 * disable power-down-mode, enable z-axis
 	 * defaults
-	 * low active, data ready interrupt on int2
+	 * push-pull, high-active, data ready interrupt on int2
 	 */
-	uint8_t data[] = {0b01000100, 0b0, 0b10100000};
+	uint8_t data[] = {0b01000100, 0b0, 0b00100000};
 
 	if (!twRequest (TWM_WRITE, LIS302DL, LIS302DL_CTRLREG1, data,
 			sizeof (data)/sizeof (*data))) {
diff --git a/gyro.c b/gyro.c
index f291d91..fe833eb 100644
--- a/gyro.c
+++ b/gyro.c
@@ -42,9 +42,8 @@ ISR(PCINT0_vect) {
 }
 
 void gyroInit () {
-	/* set PB1 to input, with pull-up */
+	/* set PB1 to input */
 	DDRB = DDRB & ~((1 << DDB1));
-	PORTB = PORTB | (1 << PORTB1);
 	/* enable interrupt PCI0 */
 	PCICR = PCICR | (1 << PCIE0);
 	/* enable interrupts on PB1/PCINT1 */
@@ -56,10 +55,10 @@ void gyroStart () {
 	/* configuration:
 	 * disable power-down-mode, enable z
 	 * defaults
-	 * low-active (does not work?), push-pull, drdy on int2
+	 * high-active, push-pull, drdy on int2
 	 * select 2000dps
 	 */
-	uint8_t data[] = {0b00001100, 0b0, 0b00101000, 0b00110000};
+	uint8_t data[] = {0b00001100, 0b0, 0b00001000, 0b00110000};
 
 	if (!twRequest (TWM_WRITE, L3GD20, L3GD20_CTRLREG1, data,
 			sizeof (data)/sizeof (*data))) {
-- 
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