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[spinel] add spinel definition guideline (#3663)

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Abtin Keshavarzian
2019-03-11 21:28:04 -07:00
committed by Jonathan Hui
parent 9c2b8815ba
commit 906fe0dffc
1 changed files with 11 additions and 0 deletions
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src/ncp/spinel.h
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@@ -33,6 +33,17 @@
#ifndef SPINEL_HEADER_INCLUDED
#define SPINEL_HEADER_INCLUDED 1
/*
* Spinel definition guideline:
*
* New NCP firmware should work with an older host driver, i.e., NCP implementation should remain backward compatible.
*
* - Existing fields in the format of an already implemented spinel property or command cannot change.
* - New fields may be appended at the end of the format (or the end of a struct) as long as the NCP implementation
* treats the new fields as optional (i.e., a driver not aware of and therefore not using the new fields should
* continue to function as before).
*/
#ifdef SPINEL_PLATFORM_HEADER
#include SPINEL_PLATFORM_HEADER
#else // ifdef SPINEL_PLATFORM_HEADER