altos: Don't compute filtered average of height error when HAS_ACCEL

[fw/altos] / src / kernel / ao_kalman.c

diff --git a/src/kernel/ao_kalman.c b/src/kernel/ao_kalman.c
index 82315c485de086b7f3b0cb64a462a878ac620119..ac41085df8166db526d26c0d5a95f5f750360056 100644 (file)
--- a/src/kernel/ao_kalman.c
+++ b/src/kernel/ao_kalman.c
@@ -45,7 +45,9 @@ static __pdata ao_k_t         ao_avg_height_scaled;
 __xdata ao_v_t                 ao_avg_height;
 
 __pdata ao_v_t                 ao_error_h;
+#if !HAS_ACCEL
 __pdata ao_v_t                 ao_error_h_sq_avg;
+#endif
 
 #if HAS_ACCEL
 __pdata ao_v_t                 ao_error_a;
@@ -83,7 +85,9 @@ ao_kalman_predict(void)
 static void
 ao_kalman_err_height(void)
 {
+#if !HAS_ACCEL
        ao_v_t  e;
+#endif
        ao_v_t height_distrust;
 #if HAS_ACCEL
        ao_v_t  speed_distrust;
@@ -91,6 +95,7 @@ ao_kalman_err_height(void)
 
        ao_error_h = ao_sample_height - (ao_v_t) (ao_k_height >> 16);
 
+#if !HAS_ACCEL
        e = ao_error_h;
        if (e < 0)
                e = -e;
@@ -98,6 +103,7 @@ ao_kalman_err_height(void)
                e = 127;
        ao_error_h_sq_avg -= ao_error_h_sq_avg >> 4;
        ao_error_h_sq_avg += (e * e) >> 4;
+#endif
 
        if (ao_flight_state >= ao_flight_drogue)
                return;