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2 Commits

Author SHA1 Message Date
Jiuzhu Dong
3a8f4b53fc apps/uorb: fix compile break 
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
 2022-07-23 16:57:58 -03:00
jihandong
3528b5515f apps/system/uorb: c interfaces. 
refer to: https://docs.px4.io/v1.12/en/middleware/uorb.html

- orb_open: do real work for advertise() and subscribe(), if thre is
            no user, register topic first, then save meta in driver;
            only first user can successfully set buffer number.
- orb_exists: check topic state, if topic only has subscribers,
	      return "not exists".

Signed-off-by: jihandong <jihandong@xiaomi.com>
 2022-07-23 16:57:58 -03:00