8f14c68660
ST ZIO connector is Arduino Uno compatible. Arduino SPI pins are placed on D10-D13 pins, where D10 is SPI nCS pin. This pin is connected with PD14 of STM32U5A. According to schematics of this Nucleo board [1]: Due to muxing constrainte, the SPI_NSS is not available as an alternate on this IO, so this pin is affected with an I/O function to do the Chip Select This means that software control of GPIO is needed to make use of this SPI interface on regular SPI signals on Arduino connector. Reconfigure SPI1 (used as Arduino SPI) interface to account for that. Note that previously configured PE12 is only available on ST ZIO and ST Morpho connectors, not on Arduino connector. Update documentation as well, which was referencing PA4 as nCS signal (used on some other Nucleo boards). [1] https://www.st.com/resource/en/schematic_pack/mb1549-u5a5ziq-c04-schematic.pdf Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev> |
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