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RTS or DTR on UART1

Michele Vaccaro

Dear All,

How do I use RST and DTR signal with UART1?

Thanks a lot

Michele

Parents
  • 0 in reply to ImPer Westermark

    Thanks.....

    This my problem.... I have a device that uses the RTS o DTR for 12V power and TX, RX e GRN for data communication. I think that I can have two solution

    1) I can use the RTS or DTR to pass the 12v to the device
    2) I can build a circuit with MAXIM so I can transform the 3.3V of the MCB2300 to 12V

    But I will want not used the second solution.... However if I must use the second solution... Which GPIO can I use?

    Sorry for my english

    Michele

Reply
  • 0 in reply to ImPer Westermark

    Thanks.....

    This my problem.... I have a device that uses the RTS o DTR for 12V power and TX, RX e GRN for data communication. I think that I can have two solution

    1) I can use the RTS or DTR to pass the 12v to the device
    2) I can build a circuit with MAXIM so I can transform the 3.3V of the MCB2300 to 12V

    But I will want not used the second solution.... However if I must use the second solution... Which GPIO can I use?

    Sorry for my english

    Michele

Children
  • 0 in reply to Michele Vaccaro

    1) There are no RTS or DTR on the MCB2300 board. The connectors only have RX and TX. The two extra signals on COM0 have the wrong direction - they are there to allow a PC so reset the LPC23xx and to have it enter ISP mode.

    2) Does your solution requires power from two signals to operate? If not, and if you don't need both serial ports on the board, then you could take the TX signal from the other serial port (on the outside of the MAX5763) to drive one of these "power" lines. You can switch the signal on or off by configuring the TX signal on the processor as a GPIO output pin.

    However, you may need need more power than a single signal can supply to feed your external equipment, in which case you either need to add another MAX232 or similar or build your own charge pump.

    Is this a school assignment, or are you using the MCB2300 for prototyping of a real product?

  • 0 in reply to ImPer Westermark

    I use MCB2300 for study but I hope in future for the job :-)
    I have bought this board for understand the world of the microcontroller and
    I will want to build an easy application for prototipe device of my friend

    I study Compuert Science

    Thanks a lot