[PR] testing/crctest: Cover SMBus PEC and CRC8 compatibility. [nuttx-apps]

["jsanchez-2g (via GitHub)" <gi...@apache.org>]

jsanchez-2g opened a new pull request, #3824:
URL: https://github.com/apache/nuttx-apps/pull/3824

   ## Summary
   
   Extend testing/libc/crctest with regression coverage for the companion NuttX crc8smbus()/crc8smbuspart() API and preservation of the existing complemented crc8ccitt API. Test known vectors, all split points, empty buffers and all 256 seeds against an independent bitwise implementation. Existing CRC tests remain.
   
   ## Impact
   
   Tests only, no production application behavior or configuration additions. Uses existing TESTING_CRC_TEST / TESTING_CMOCKA infrastructure. Depends on [Apache NuttX PR #20566](https://github.com/apache/nuttx/pull/20566), which supplies the SMBus helpers. Merge that API before this test change. Build against NuttX containing that API.
   
   ## Testing
   
   Ubuntu 24.04 / WSL2 x86_64, native cc with -Wall -Wextra -Werror (unused test-state parameters suppressed), real CMocka 1.1.7. Compiled the actual crctest_main.c and NuttX CRC source files with host types and minimal FAR/config definitions. All nine cases pass. Full-file style, encoding and spelling checks pass. This is host execution, not a full NuttX target test build.
   
   ## PR verification Self-Check
   
   - [x] One functional change: regression test coverage.
   - [x] Impact and validation described.
   - [x] Human Signed-off-by and post-commit message checks complete.
   - [x] Ready for review; companion dependency noted.
   


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Re: [PR] testing/crctest: Cover SMBus PEC and CRC8 compatibility. [nuttx-apps]

["xiaoxiang781216 (via GitHub)" <gi...@apache.org>]

xiaoxiang781216 merged PR #3824:
URL: https://github.com/apache/nuttx-apps/pull/3824


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