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Using one SPI CS for two peripherals

Ekrem Bayraktar
Expert 1190 points
Other Parts Discussed in Thread: TMS320C5515

Hi all,

For my application with TMS320C5515 I need to use 2 SPI periherals but I also need to use UART, LCD, and GPIO. Therefore I selected PPMODE = 5, SP0 mode = 2 and SP1 mode = 2. However with this configuration I end up with only one SPI_CS, but I need two. Any idea about this problem?

Regards.

  • 0
    TI__Mastermind 23785 points

    Your setting will only gives you SPI on the parallel port. This is the result from your setting:

    PPMODE = 5 gives you

    101 = Mode 5 (8-bit LCD Controller,SPI, and UART). 8-bits of pixel data of the LCD Controller
    module, 4 signals of the SPI module, and 4 signals of the UART module are routed to the 21
    external signals of the parallel port

    SP0 = 2 gives you

    10 = Mode 2 (GP[5:0]). 6 GPIO signals (GP[5:0]) are routed to the 6 external signals of the serial port 0.

    SP1 = 2 gives you

    10 = Mode 2 (GP[11:6]). 6 GPIO signals (GP[11:6]) are routed to the 6 external signals of the serial port 1.

  • 0 in reply to Steve Tsang
    Expert 1190 points

    Hello Steve,

    Therefore I cannot use multiple SPI peripherals with the communication protocols the I mentioned above, correct? Any other configuration to use all of them.

    Regards.