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Add failsafe to prevent arming without prior zero throttle

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This commit is contained in:
Oleg Kalachev
2025-01-24 16:23:59 +03:00
parent 7d2d54a94d
commit 15fbe34d19
2 changed files with 19 additions and 2 deletions
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19
flix/failsafe.ino
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@@ -1,7 +1,7 @@
// Copyright (c) 2024 Oleg Kalachev <okalachev@gmail.com>
// Repository: https://github.com/okalachev/flix
// Fail-safe for RC loss
// Fail-safe functions
#define RC_LOSS_TIMEOUT 0.2
#define DESCEND_TIME 3.0 // time to descend from full throttle to zero
@@ -10,13 +10,28 @@ extern double controlsTime;
extern int rollChannel, pitchChannel, throttleChannel, yawChannel;
void failsafe() {
armingFailsafe();
rcLossFailsafe();
}
// Prevent arming without zero throttle input
void armingFailsafe() {
static double zeroThrottleTime;
static double armingTime;
if (!armed) armingTime = t; // stores the last time when the drone was disarmed, therefore contains arming time
if (controlsTime > 0 && controls[throttleChannel] < 0.05) zeroThrottleTime = controlsTime;
if (armingTime - zeroThrottleTime > 0.1) armed = false; // prevent arming if there was no zero throttle for 0.1 sec
}
// RC loss failsafe
void rcLossFailsafe() {
if (t - controlsTime > RC_LOSS_TIMEOUT) {
descend();
}
}
// Smooth descend on RC lost
void descend() {
// Smooth descend on RC lost
mode = STAB;
controls[rollChannel] = 0;
controls[pitchChannel] = 0;