PDA even parity serial bug?

[rsthj]

Greetings All,

I've run into a problem doing serial communications w/the Palm. I'm using the .vi found here:
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=DDE270C6816F61BDE034080020E74861

I've installed the Palm_serial.vi both on the Palm and on my PC and attempted to get them to talk. When the port settings are left at their default values everything works fine. However, when the parity is changed to even, communication is no longer possible.

Would somebody be willing to confirm that a) this should work, b) that it doesn't, and c) a work around?

Any help will be very much appreciated,

Tom

[Philip_Courtois]

Hi tundra,

As far as I know the example SHOULD work, even when using parity bit.

When running the example on the PDA, are you then building your own *.prc-file from the VI using LabVIEW PDA, or are you just using the *.prc-file attached with the example? The *.prc-files in the example do not use parity bit, so you have to build your own *.prc-file from the changed VI.

In case it still doesn't work, try to use the HyperTerminal from "Start » All Programs » Accesories » Communications" and test the connection there. Make sure to configure the serial connection appropriately within the HyperTerminal. Test it first without parity and when that works test it with parity enabled.

Please keep me updated on your progress, thanks.

Have fun!

[rsthj]

Hi Philip,

Thanks for your reply. I've investigated further and there are definitely issues when the parity bit is set to even, mark or space. However, if you lower the baud rate on the Palm by about 5-6%, flakey communication becomes possible. e.g. computer set to 9600 bps w/even parity, Palm set to ~9000 bps w/even parity. I've confirmed this behavior both on a Tungsten T3 and on a Palm m125. Communication works as expected when set to no parity or odd parity. Any insight?

Thanks much,

Tom