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authorLars-Dominik Braun <lars@6xq.net>2015-01-29 11:20:11 +0100
committerLars-Dominik Braun <lars@6xq.net>2015-01-29 11:20:11 +0100
commitaf4ea653a341f3c25cfbb2e7ec4b633bf73913a7 (patch)
tree4a9e4a50a123c6c04f5e571bf39d900d46b90315
parent9528470d8389840618275814c30e4f64a9e3efa7 (diff)
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accel: Ignore shake if horizon changed
-rw-r--r--accel.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/accel.c b/accel.c
index f3f0ce2..9f38e8e 100644
--- a/accel.c
+++ b/accel.c
@@ -25,7 +25,7 @@
/* offset for horizon detection */
#define ACCEL_1G_OFF (5)
/* threshold starting shake detection */
-#define ACCEL_SHAKE_START (70)
+#define ACCEL_SHAKE_START (90)
/* difference prev and current value to get the current one registered as peak */
#define ACCEL_SHAKE_REGISTER (120)
/* 100ms for 100Hz data rate */
@@ -42,6 +42,7 @@ static uint8_t shakeCount = 0;
static uint8_t shakeTimeout = 0;
static int16_t prevShakeVal = 0;
static uint8_t peakCount = 0;
+static horizon shakeHorizon = HORIZON_NONE;
/* horizon position */
/* current */
@@ -100,7 +101,12 @@ void accelStart () {
static void accelProcessShake () {
if (shakeTimeout > 0) {
--shakeTimeout;
- if (sign (prevShakeVal) != sign (zvalnormal) &&
+ if (horizonSign != shakeHorizon) {
+ /* ignore if horizon changed */
+ shakeTimeout = 0;
+ prevShakeVal = 0;
+ peakCount = 0;
+ } else if (sign (prevShakeVal) != sign (zvalnormal) &&
abs (prevShakeVal - zvalnormal) >= ACCEL_SHAKE_REGISTER) {
++peakCount;
shakeTimeout = ACCEL_SHAKE_TIMEOUT;
@@ -124,6 +130,7 @@ static void accelProcessShake () {
shakeTimeout = ACCEL_SHAKE_TIMEOUT;
peakCount = 1;
prevShakeVal = zvalnormal;
+ shakeHorizon = horizonSign;
}
}