Re: Timing in Synch Comm.

Jon Slaughter wrote:

"Vladimir Vassilevsky" <antispam_bogus@xxxxxxxxxxx> wrote in message news:TMCIi.28025$eY.691@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx


Jon Slaughter wrote:



I'm writing a windows app which sends data to the parallel port but because its pre-emptive there can be extreme latency in the timing.

Actually I'm trying to do it any synch communications. SPI, I2C, and ICSP will be some of the protocols I'll try and implement.

There is no point in developing anything for the parallel port now.
This is what you need:

http://www.ftdichip.com/Products/FT2232C.htm



Well, I wanted to hook directly up to some devices with minimum external circuitry. Eventually I might add support for usb and some other devices but at this point all I have is the parallel port.

I'm essentially just making something that is similar to WinPic. So if I wanted to program so some pics or play with some controllers that use some some communications method I could do it quite easily by just typing in the commands and have the program do the rest(its more work than that but it would only need to be done once).


But keep in mind that when your PC croaks the new one might no longer have a parallel port. Adapters might be available for a while but aren't 100% the same. Then all your work could be flushed down the drain. Personally I'd go RS232 since USB-RS232 should be available for a long time.

--
Regards, Joerg

http://www.analogconsultants.com
.

Relevant Pages

  • Re: Timing in Synch Comm.
    ... Joerg wrote: ... because its pre-emptive there can be extreme latency in the timing. ... What else is the PC parallel port can be used for if not for the simulation of the SPI or I2C by bit banging? ...
    (sci.electronics.design)
  • Re: Timing in Synch Comm.
    ... because its pre-emptive there can be extreme latency in the timing. ... will be some of the protocols I'll try and implement. ... There is no point in developing anything for the parallel port now. ...
    (sci.electronics.design)
  • Re: Timing in Synch Comm.
    ... because its pre-emptive there can be extreme latency in the timing. ... ICSP will be some of the protocols I'll try and implement. ...
    (sci.electronics.design)
  • Re: Timing in Synch Comm.
    ... because its pre-emptive there can be extreme latency in the timing. ... What else is the PC parallel port can be used for if not for the simulation of the SPI or I2C by bit banging? ... It's quicker to print and I don't have to get off my keester :-) ...
    (sci.electronics.design)
  • Re: Timing in Synch Comm.
    ... Jon Slaughter wrote: ... because its pre-emptive there can be extreme latency in the timing. ... will be some of the protocols I'll try and implement. ...
    (sci.electronics.design)