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MSP430FR2355: SPI MOSI Active Low

Vlad Revici9
Prodigy 195 points
Part Number: MSP430FR2355


Hi,

Is there a way to set the SPI line on this MSP430FR2355 to be idle high and low when transmitting?

Many Thanks,

Vlad

  • 0
    Guru 100845 points
    Are you trying to have the SPI transmit high for 0 and low for 1? I haven't seen a feature like that (anywhere).

    You can always bitwise-invert the bytes before you send them.
  • 0
    TI__Genius 13215 points
    Hi Vlad,

    What is the mean of your "SPI line"? MISO/MOSI, STE or CLK?

    The MISO/MOSI data line idle level should be the last bit of the previous transmitting.
    The STE idle and transmitting level could be configured by UCMODEx. Please refer to the Table 23-1 of the User's Guide(www.ti.com/.../slau445h.pdf)
    The CLK idle and transmitting level(Clock Polarity) could be configured by UCAxCTLW0.UCCKPL. Please refer to the Section 23.3.6.1 of the User's Guide.

    As mentioned, you could bitwise-invert the bytes before you send them if you want SPI transmit high for 0 and low for 1.

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