mavlink: set system clock from SYSTEM_TIME

[dakejahl]

Previously the system clock was only set if the "offboard" timestamp was valid and the "onboard" timestamp was invalid. This usually is not the desired behavior, since your onboard time could be valid but just hours/days/weeks behind the actual time. A system that sends the SYSTEM_TIME message (eg companion computer application) will update the PX4 time if PX4 is behind by more than a minute.

[github-actions]

🔎 FLASH Analysis

px4_fmu-v5x [Total VM Diff: 64 byte (0 %)]

    FILE SIZE        VM SIZE    
--------------  -------------- 
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  +0.0%     +61  +0.0%     +61    [section .text]
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  -0.2%      -4  [ = ]       0    ../../src/lib/version/version.c
  +0.0%     +73  [ = ]       0    src/modules/mavlink/modules__mavlink_unity.cpp
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  -1.3%     -25  [ = ]       0    ../../src/lib/version/version.c
  +0.0%     +34  [ = ]       0    src/modules/mavlink/modules__mavlink_unity.cpp
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-0.1%     -64  [ = ]       0    [Unmapped]
+0.0%    +116  +0.0%     +64    TOTAL

px4_fmu-v6x [Total VM Diff: 56 byte (0 %)]

    FILE SIZE        VM SIZE    
--------------  -------------- 
+0.0%     +56  +0.0%     +56    .text
+0.0%     +56  [ = ]       0    .debug_abbrev
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  -0.2%      -4  [ = ]       0    ../../src/lib/version/version.c
  +0.0%     +73  [ = ]       0    src/modules/mavlink/modules__mavlink_unity.cpp
+0.0%     +11  [ = ]       0    .debug_line
  -1.3%     -25  [ = ]       0    ../../src/lib/version/version.c
  +0.0%     +34  [ = ]       0    src/modules/mavlink/modules__mavlink_unity.cpp
  +0.2%      +2  [ = ]       0    task/task_cancelpt.c
+0.0%      +6  [ = ]       0    .debug_loc
  +0.0%      +6  [ = ]       0    src/modules/mavlink/modules__mavlink_unity.cpp
-0.0%     -11  [ = ]       0    .debug_ranges
  -2.6%      -8  [ = ]       0    ../../src/lib/version/version.c
  -4.5%      -3  [ = ]       0    task/task_cancelpt.c
+0.0%      +5  [ = ]       0    .debug_str
  +0.0%      +5  [ = ]       0    src/modules/mavlink/modules__mavlink_unity.cpp
-0.1%     -56  [ = ]       0    [Unmapped]
+0.0%    +128  +0.0%     +56    TOTAL

Updated: 2025-05-12T04:18:18