802.15.4: Add raw userspace driver #4016
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This avoids all of the MAC layers, framing, etc. and works with the radio directly.
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Ok I pushed a commit that fixed the bug I was having. I've now tested this with the libtock-c radio_raw_tx and radio_rx apps and I'm getting packets from one device to the other. |
| //! ``` | ||
| //! | ||
| //! `user_frame` denotes the 15.4 frame in addition to the relevant 3 bytes of | ||
| //! metadata (offset to data payload, length of data payload, and the MIC len). |
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where in user_frame are these 3 relevant bytes?
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The answer is on line 354, but that won't be exported to documentation. Worth just repeating that comment here IMO.
| //! be passed to the process. The ring buffer is designed to overwrite old | ||
| //! packets if the buffer becomes full. If the process notices a high number of | ||
| //! "dropped" packets, this may be the cause. The process can mitigate this | ||
| //! issue by increasing the size of the ring buffer provided to the capsule. |
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This paragraph mixes description with justification in a way that's a bit confusing. Would probably be better to split them up. Sometimes I want to just know what the interface is and I only separately care about why this is the interface.
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This text was already merged before, we use the same logic for the other syscall driver. I didn't create or write this.
Pull Request Overview
This pull request adds a new 802.15.4 syscall driver that does not handle and framing or packet processing in the kernel. It uses the radio HIL directly. This is useful for running networking stacks like OpenThread in userspace.
Testing Strategy
Testing as part of the full series of 15.4 changes.
TODO or Help Wanted
Need to update the other 15.4 driver with the new commands.Need to figure out what to name this.
Documentation Updated
/docs, or no updates are required.Formatting
make prepush.