Hi Kevin,
Last week I struggled with the same problems. Today, I finally could
download a program to the controller for the first time. Let's see if I can
help you. By the way I'm using the MSP430F2131.

>   Does anyone happen to know what to set the mmcu option to for a
> MSP430F21x1?


I choosed -mmcu=msp430x1232. I compared the data sheets. Memory organisation
seems to be the same.


>   The version of msp430-gdbproxy that I got about a week ago from
> http://www.soft-switch.org/downloads recognizes the device as:


That's the only version I got to run properly with this type of controller.


> msp430: Target device is a 'MSP430F21x1' (type 46)
>
>   but when I run `msp430-gcc --target-help `, I don't see any
> options for the
> msp2 family (other than "msp2").  Any ideas?

Nope. I never tried. But the connection is assigned correctly.
At this point I started msp430-gdb in order to program the device.

Best regards,
Ben


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