Re: USB for D60A?

Started by Killingsworth, Steve July 16, 2003

On the WindoZ side, is installation of the Plug-and-Pray USB driver
automatic for the RS-232 COMM port (i.e. built into the OS) or will a
special driver/install disk have to be obtained/written?

I have used numerous USB to Serial type adapters (RS232 and RS422/485) and
all of them came with an required install disk with drivers.

How does FTDI handle this? -----Original Message-----
From: Andrei Chichak [mailto:]
Sent: Wednesday, July 16, 2003 12:56 PM
To:
Subject: Re: [68HC12] USB for D60A? At 11:28 AM 7/16/2003 -0500, you wrote:

>A customer wants us to replace the serial port on our D60A-based product
>with USB. It looks to me like maybe the simplest solution will be to add
>the Motorola RD68HC908USB chip to the board, and just have the D60A and the
>908 talk over the SPI or some such.
>
>Has anyone used this method, or have a better suggestion?
>
> tnx, jmk

How about something like the FTDI FT8U232AM chip? It has USB on one side
and RS232 (RX/TX/RTS/CTS/DTR/DSR/DCD/RI) on the other side.

See www.ftdichip.com for more info.

Andrei >-----------
>James M. Knox
>TriSoft ph 512-385-0316
>1109-A Shady Lane fax 512-366-4331
>Austin, Tx 78721
>----------- >
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At 11:02 PM 7/16/03 +0200, you wrote:
>I have used numerous USB to Serial type adapters (RS232 and RS422/485) and
>all of them came with an required install disk with drivers.

See http://www.ftdichip.com/FTDriver.htm. My reading is that Windows and
MacOS support requires shipping a disk with the product. Linux, FreeBSD,
and OpenBSD already have the drivers in the kernel.

Stephen

--
Stephen Trier
Technical Development Lab
Cleveland FES Center / CWRU
/ KG8IH


In a message dated 7/16/03 4:58:56 PM Eastern Daylight Time,
writes:
hi bob:

i've never been able to get a usb to rs-232 adaptor to work properly. can
you recommend one that actually works? i've tried about 4 different ones
with little (if any) luck.

regards,
ed
I have used the ftdi chips and saelig told me the sealevel usb-232 converters
also use the ftdi chips. We build simulated aircraft instruments for
simulator companies... one of em wanted usb instruments, so we just bolted the
adapters inside the can... instrument was already rs232... hard part was cleaning out
three or four messed up driver installs out of the registry... using the
ftdi 'virtual com port' driver they provide, if I sent a char at a time I could
only get about 1800 chars a sec. I discovered if I sent the whole 'packet' of
about a dozen chars with one write() the chip handled 38400 easily... I should
think so! You can set the baud rate in the driver to something astronomical.
Wishful thinking......


hi bob:

"the hard part was cleaning out three or four messed up driver installs out
of the registry."

indeed this was the legacy left from my attempts as well.

i'll look into the ftdi chips when i get back from vacation.

regards,

ed