Hyperterminal

Fmicrochip

I'm having trouble setting Hyperterminal to 230,400baud, 8-N-1
I can set it to any other baud less than 230,400 but it gives a message telling me to check my settings when I increase the baud to 230,400 and click on 'connect'.It must be possible to use the higher bauds otherwise they wouldn't be there.
Any ideas?

thanks..

Balfa

Most UARTs (chips that convert parallel data from PC to serial data for phoneline) in COM ports (including virtual COM ports inside internal and USB modems) are capable only of 115,200bps (different from "baud").

The reason you're getting the error message is probably because your hardware doesn't support it.

Of course I might be wrong... give us the exact error message and all other settings you're using, as well as some hardware spec, and maybe we'll come to a better diagnosis.

By the way, is there any reason you're using Hyper Terminal to dial up? It's rather antiquated these days...

stevenmu

Most serial ports will support a max of 115.2k (or maybe it's 128k). Not sure why the higher ones are there, maybe theres some specialised IO cards you can get that support higher or something. In general though the best you'll get is 115.2k/128k. Have a look at whatever COM port you're using under device manager, that'll show what it's max speed is (it could turn out to be set to lower than it's max).

Fmicrochip

Thanks for the replies.

I checked device manager as you suggested and this only gives up to 128k so it looks like a hardware limitation.

By the way, is there any reason you're using Hyper Terminal to dial up? It's rather antiquated these days...

Not doing any modem/dial-up stuff. I only use Hyperterminal for debugging projects, sending debug info from the microcontroller to the PC, usually at low baud rates. This time i needed to test streaming data at a higher speed but its ok, i can use 2 micros instead.

Balfa

Sounds interesting. What kinda of projects are they and what kind of chips are you using?

If I may ask!

Fmicrochip

Sounds interesting. What kinda of projects are they and what kind of chips are you using?

Yea it is interesting:)
I won't go into detail but I have to do pretty much every kind of project in my job(seriously!).
I use 8 and 16-bit micros from a nice Arizona-based company called Microchip Technology.

Capt'n Midnight

Check your chipset to see what it supports.
Don't forget that windows used to need special drivers to get USB 2.0 speeds.

google for serial speed rs232 921 or 921kbps though I'm not sure if this is the buffer or the actual I/O speed.

Balfa

by the way, fmicrochip, you have a PM.