ACM interface on TI Launchpad

[Warren Block]

On Sun, 30 Jan 2011, Hans Petter Selasky wrote:

> On Sunday 30 January 2011 01:32:01 Peter Jeremy wrote:
>> I recently acquired a TI LaunchPad[1] and want to use FreeBSD as my
>> development enviroment (for anyone else who is interested in this, at
>> some stage I intend to post my experiences with the various ports to
>> -ports or feel free to contact me off-list).  It provides a FET430UIF
>> USB interface to the host computer and some googling shows that this
>> is a Communication Device Class (CDC), Abstract Control Model (ACM)
>> sub-class which is supported in Linux via the cdc_acm driver.
>>
>> On FreeBSD 8.1, umodem(4) reports:
>>  ugen0.2: <Texas Instruments> at usbus0
>>  umodem0: <MSP430 Application UART> on usbus0
>>  umodem0: data interface 0, has no CM over data, has no break
>> and creates /dev/ttyU0 (and friends) but mspdebug reports that it
>> cannot access the UIF (so it is presumably talking to the device
>> UART, rather than the control interface).
>
> There is a patch pending for allowing a CDC modem interface not having the
> correct descriptors to work. It is not yet committed. You could try adding the
> VID+PID to u3g.c. Basically, your modem should have worked, given that the
> manufacturer had followed the specs. Another alternative is to use LibUSB.

The prerelease MacOSX driver might be useful as an example:
http://processors.wiki.ti.com/index.php/MSP430_LaunchPad_Mac_OS_X