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-rw-r--r--src/drivers/drv_pwm_output.h3
-rw-r--r--src/drivers/px4io/px4io.cpp11
2 files changed, 14 insertions, 0 deletions
diff --git a/src/drivers/drv_pwm_output.h b/src/drivers/drv_pwm_output.h
index 972573f9f..84815fdfb 100644
--- a/src/drivers/drv_pwm_output.h
+++ b/src/drivers/drv_pwm_output.h
@@ -202,6 +202,9 @@ ORB_DECLARE(output_pwm);
/** force safety switch off (to disable use of safety switch) */
#define PWM_SERVO_SET_FORCE_SAFETY_OFF _IOC(_PWM_SERVO_BASE, 23)
+/** force failsafe mode (failsafe values are set immediately even if failsafe condition not met) */
+#define PWM_SERVO_SET_FORCE_FAILSAFE _IOC(_PWM_SERVO_BASE, 24)
+
/*
*
*
diff --git a/src/drivers/px4io/px4io.cpp b/src/drivers/px4io/px4io.cpp
index 711674886..f5ff6e55e 100644
--- a/src/drivers/px4io/px4io.cpp
+++ b/src/drivers/px4io/px4io.cpp
@@ -2222,6 +2222,17 @@ PX4IO::ioctl(file * filep, int cmd, unsigned long arg)
ret = io_reg_set(PX4IO_PAGE_SETUP, PX4IO_P_SETUP_FORCE_SAFETY_OFF, PX4IO_FORCE_SAFETY_MAGIC);
break;
+ case PWM_SERVO_SET_FORCE_FAILSAFE:
+ /* force failsafe mode instantly */
+ if (arg == 0) {
+ /* clear force failsafe flag */
+ ret = io_reg_modify(PX4IO_PAGE_SETUP, PX4IO_P_SETUP_ARMING, PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE, 0);
+ } else {
+ /* set force failsafe flag */
+ ret = io_reg_modify(PX4IO_PAGE_SETUP, PX4IO_P_SETUP_ARMING, 0, PX4IO_P_SETUP_ARMING_FORCE_FAILSAFE);
+ }
+ break;
+
case DSM_BIND_START:
/* only allow DSM2, DSM-X and DSM-X with more than 7 channels */