# How can i use libuavcan **URL:** \ **Category:** LibCyphal\ **Created:** [August 12, 2020, 7:01am UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912 "2020-08-12T07:01:36Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![newcomer](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/n/e5b9ba/32.png) [@newcomer](https://forum.opencyphal.org/u/newcomer)\ **Post date:** [August 12, 2020, 7:01am UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/1 "2020-08-12T07:01:36Z")
- Can you provide me with a route or a simple example? I had read the uavcan guide,UAVCAN\_Specification\_v1.0-alpha,but i still do not how to use it . the pyuavcan seems difficult to me. ---
**Author:** ![pavel.kirienko](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/pavel.kirienko/32/9_2.png) [@pavel.kirienko](https://forum.opencyphal.org/u/pavel.kirienko)\ **Post date:** [August 12, 2020, 4:03pm UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/2 "2020-08-12T16:03:59Z")
Libuavcan is still not ready, sorry. You can do either: - Use PyUAVCAN, assuming that you’re not dealing with a deeply embedded system. You said that you find it difficult, but we’re willing to help on the forum if you have any questions. - Use Libcanard. This implementation supports only UAVCAN/CAN; if you’re interested in UDP or other transports, it will not work. ---
**Author:** ![newcomer](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/n/e5b9ba/32.png) [@newcomer](https://forum.opencyphal.org/u/newcomer)\ **Post date:** [August 17, 2020, 3:46pm UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/3 "2020-08-17T15:46:37Z")
Thanks your reply.But now i want to know how to port libcanard to a stm32 board as a bare metal driver .Could you tell me how to realize it? Looking forward your reply! ---
**Author:** ![pavel.kirienko](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/pavel.kirienko/32/9_2.png) [@pavel.kirienko](https://forum.opencyphal.org/u/pavel.kirienko)\ **Post date:** [August 17, 2020, 3:51pm UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/4 "2020-08-17T15:51:34Z")
We have the header file with the API specs in [Libcanard v1 STM32 driver design guidelines](https://forum.opencyphal.org/t/libcanard-v1-stm32-driver-design-guidelines/798). One just needs to write the implementation for it. Can you do that? ---
**Author:** ![newcomer](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/n/e5b9ba/32.png) [@newcomer](https://forum.opencyphal.org/u/newcomer)\ **Post date:** [August 20, 2020, 5:58am UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/5 "2020-08-20T05:58:19Z")
Thanks for you suggestion.I am working on it . Now i want to understand the canard.c，but i couldn’t find any useful reference on [https://uavcan.org/](https://uavcan.org/). Could you please tell me how to realize the canard.c? ---
**Author:** ![pavel.kirienko](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/pavel.kirienko/32/9_2.png) [@pavel.kirienko](https://forum.opencyphal.org/u/pavel.kirienko)\ **Post date:** [August 20, 2020, 8:31pm UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/7 "2020-08-20T20:31:32Z")
The documentation for libcanard is available at [https://github.com/UAVCAN/libcanard](https://github.com/UAVCAN/libcanard), if that’s what you’re asking. ---
**Author:** ![newcomer](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/n/e5b9ba/32.png) [@newcomer](https://forum.opencyphal.org/u/newcomer)\ **Post date:** [August 21, 2020, 12:32am UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/8 "2020-08-21T00:32:16Z")
Thanks! But I know where the file is ,what i need to know is how to write the API in the canard.c. I have no idea,hope you give me a suggestion.Thank you very much! 😃 ---
**Author:** ![pavel.kirienko](https://forum.opencyphal.org/user_avatar/forum.opencyphal.org/pavel.kirienko/32/9_2.png) [@pavel.kirienko](https://forum.opencyphal.org/u/pavel.kirienko)\ **Post date:** [August 21, 2020, 1:01am UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/9 "2020-08-21T01:01:52Z")
> [@newcomer](#): > > what i need to know is how to write the API in the canard.c You don’t need to modify `canard.c`, it’s finished. I think what you mean is how do you implement the STM32 driver whose header file I linked above; for that, you should just read the comments in the header file. They provide an exhaustive description of its behavioral contracts. ---
**Author:** ![newcomer](https://forum.opencyphal.org/letter_avatar_proxy/v4/letter/n/e5b9ba/32.png) [@newcomer](https://forum.opencyphal.org/u/newcomer)\ **Post date:** [August 21, 2020, 2:49am UTC](https://forum.opencyphal.org/t/how-can-i-use-libuavcan/912/10 "2020-08-21T02:49:29Z")
OK。 Thanks