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Added 9N1 serial definitions to support 9-bit UART #238

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Added 9N1 serial definitions to support 9-bit UART #238

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Commits on Oct 5, 2024

  1. Update HardwareSerial.h Adding 9N1 support 

    I added two define statements to allow boards like the UNO R4 WIFI to use their 9-bit UART via the 16-bit register. This is to support a pull request coming to the renesas_uno core to activate and facilitate the processor's 9-bit functionality.
    @vashadow
    vashadow authored Oct 5, 2024
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Commits on Oct 13, 2024

  1. Update HardwareSerial.h with 9-bit definitions 

    I added all the combinations of 9-bit serial.
9N1, 9N2, 9E1, 9E2, 9O1, 9O2, 9M1, 9M2, 9S1, 9S2
This allows newer processors like the RA4M1 to use its built-in 9-bit support. 9Bit is widely used on many industrial and embedded machines, and having a true 9-bit UART brings a high value add to these boards.
    @vashadow
    vashadow authored Oct 13, 2024
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  2. Merge pull request #1 from vashadow/9-bit-api-patch 

    Update HardwareSerial.h with 9-bit definitions
    @vashadow
    vashadow authored Oct 13, 2024
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