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Switch the STM32H5 SPI master to software NSS and chunked TSIZE - #2

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maschull106 wants to merge 1 commit into
feat/stm32h5-platformfrom
feat/stm32h5-spi-nss
Open

maschull106 wants to merge 1 commit into
feat/stm32h5-platformfrom
feat/stm32h5-spi-nss

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@maschull106

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Summary

  • Program TSIZE per chunk, use software NSS (SSM/SSI), flush the RX FIFO, and clear sticky status flags before each transfer.
  • Stacked on feat/stm32h5-platform because the SPI driver lands there. Retarget this pull request to develop after that one merges.

Test plan

  • Generate and build an STM32H5 SPI master project from this branch.
  • After feat/stm32h5-platform merges, retarget the base to develop and confirm the diff is only these three SPI files.

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