Re: elimination of intercharacter gap in RS232 stream?


"Bo" <bo@xxxxxxxxxx> wrote in message
news:50921$470d02cb$41a26d4d$30902@xxxxxxxxxxxxxxxxxx
Writing an Embbeded Linux app for a PC104/Versalogic board. Linux
2.6.14.17.

Using write() to transmit data packets to another PC104 board. If I
write()
30 bytes, sometimes there is a 2-5mS gap in the middle of the
transmission, usually at about byte 15-20, but sometimes at byte 29--as
seen on a scope. Tried using low latency setting when
opening the port--but this made no difference. This is causing
difficulties for the receiving end-- and we have yet to add two more
serial ports to the application.

Any ideas on how to force continous transmission of the data?


Thanks,

Bo

Try looking at the handshaking line from the receiver along with the data
stream.
The receiver may be requesting the pause. The receiver may need a larger
buffer.

Don


.

Relevant Pages

  • Re: Pioneer 10 test of light speed delay
    ... 2)The fact that Horizons positions of the spacecraft and earthsite ... motions at the time of transmission according to the conventional ... prediction that assumes the transmission time was a few seconds ... if the transmitter was off at the receiver site because the earthcraft ...
    (sci.astro)
  • Re: Pioneer 10 test of light speed
    ... No but I did look at your spreadsheet based on a program like mine ... the subsequent craft velocity and subsequent position. ... >> received receptions at any site unless there was transmission at ...
    (sci.astro)
  • Re: Pioneer 10 test of light speed
    ... > received receptions at any site unless there was transmission at the ... > same time from that reception site. ... > Look at good instances in your spreadsheets or mine of 87 receiver ... > Where is the spreadsheet. ...
    (sci.astro)
  • Re: GPS : Basic pseudo-distance computation
    ... synchronized with the code at the time of transmission. ... The PRN code is a spreading code that spreads the spectrum of the transmitted ... The receiver uses correlation to keep the locally generated code matched to ... the GPS time. ...
    (sci.geo.satellite-nav)
  • Re: Pioneer 10 test of light speed
    ... Look at good instances in your spreadsheets or mine of 87 receiver ... Where is the spreadsheet. ... >> transmission from the earth at the same time but would not show such ... > extrapolates beyond a second this would be a red flag to suggest that ...
    (sci.astro)