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TMS570LS20x MDK SCI problem

Thanh Bui1
Prodigy 10 points
Other Parts Discussed in Thread: TMS570LS3137

Hi, I got Keil MCBTMS570 and are working on SCI1 module. I did transmit and receive through XDS100V2 emulator successfully, but I notice that there is another mini USB-connector on IO board which name is "USB to UART0". From what I know, UART0 is SCI1 but there is no signal from that connector. I checked the schematic, its pin is UART0_RX and UART0_TX, not SCI1_TX and SCI1_RX. Could anyone explain it for me, and how to send data through this connector? Thank you so much.

  • 0
    TI__Guru 68820 points

    Thanh,

    On the CPU card, the TMS570 chip has LIN1 and LIN2 modules which can be used either as LIN or UART.

    LIN1 goes to the XDS100v2 on the CPU card.  LIN2 goes to the IO board where it can be routed either to
     an RS485 transceiver or to a LIN transceiver.

    The USB to UART that you're pointing to goes to one of the UARTs on the DSP device.  To use this you would need to write code that accesses the USB port through the HPI port of the DSP and then through the EMIF of the TMS570.  Probably more effort than you want to expend.  Probably you need to just access LIN2 at the RS485 transceiver.

    Should also note that this part is now dated and we'd recommend upgrading to the newer TMS570LS3137 if possible. There is a different board and more up to date software for this part.