A single report is fine. Thanks.
Yes, it appears the USB section of RAM was not incorporated in the device
list I got from TI, so you should be safe from potential assignment
collisions. I'll look at the linker scripts in Code Composer when I deal
with the bug, but if that's the model they use those chips will always have
a USB memory section defined, and if you want to use it as normal RAM you'll
have to assign variables to it explicitly using the section attribute.
You could probably avoid the assembler file with a simple:
uint8_t USBMEM[2048] asm("0x1c00");
in your C source somewhere.
Peter
On Sat, Nov 20, 2010 at 3:25 PM, Mark J. Blair <n...@nf6x.net> wrote:
>
> On Nov 20, 2010, at 1:15 PM, Peter Bigot wrote:
> > Would you mind filing a bug report asking for this (prevent use of
> USB-reserved memory on relevant devices), so I don't forget it? Thanks.
>
> No problem, I'll do that. Shall I file two separate reports, with one
> asking to prevent mis-use of the USB RAM when the USB interface shall be
> used, and another asking for a way to return the USB RAM to the general pool
> if the USB interface won't be used? Or shall I combine both of those into a
> single report?
>
> I'm beginning to study the msp430f5529 linker scripts now, and they don't
> appear to define the existence of the USB RAM (0x1C00-0x23FF) at all. If I
> understand this correctly, does this mean that the linker won't try to place
> any general variables into the USB memory, and my current technique (hack?)
> of not allocating the USB endpoint buffers in C code and simply defining
> their symbol addresses in an assembler file is likely to work (even if it's
> not the ideal way to do this)?
>
> --
> Mark J. Blair, NF6X <n...@nf6x.net>
> Web page: http://www.nf6x.net/
> GnuPG public key available from my web page.
>
>
>
>
>
>
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