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BS1 USB to Serial Communications — Parallax Forums

BS1 USB to Serial Communications

carlinecarline Posts: 13
edited 2008-11-03 16:54 in BASIC Stamp
I purchased a 'Prolific USB to Serial Cable' for use on a laptop w/o serial
port and installed a driver for it. Unable to sucessfully ID the BS1.·
Windows device manager sees the cable in COM4.

Works OK if using standard DB9 - DB9· Serial but with USB to serial
always get 'ignoring' regardless of how I have it set. Using 8N1 @2400.

It is included in the scan and have it set 1st to scan.·Ideas?

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Chuck Arline

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Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2008-11-01 17:38
    Many USB serial adapters do not properly implement the handshaking lines and cannot be used with any of the Parallax microprocessors for programming. The ones I know work include pretty much any that use the FTDI chip including the ones sold by FTDI and Parallax and the Keyspan High Speed Serial Adapter. The particular handshaking line involved is DTR which Parallax uses to reset the microprocessor for programming.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-11-03 16:54
    Ignoring usually means that you have either specified a port to use for downloading in the BASIC Stamp Editor (You should use AUTO) or there is a PORT directive in your code specifying the port to use. Whenever a port is specified, all other ports are ignored.

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    Chris Savage
    Parallax Engineering
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