Tried that before and it didn't matter. Turns out the ioctls don't work
on 2.6.21 or at least I can't make them work. When I used mmap and
toggled the memory addresses in the manual I was able to get it to
work fine
> ^^^
> You have to pass an int, not a char
>>
>> // open socket above here
>>
>> char mcr = 5;
>
> int mcr = 5;
>
> Regards,
> Chris
>
>>
>> if ( -1 == ioctl ( _sock, TIOC_SBCS485, &mcr ) )
>> cerr << "ioctl: " << strerror ( errno ) << " (" << errno << ")" << endl;
>>
>> to get a half-duplex RS485 at 19200 baud. When I try this, though, I get
>> the error
>>
>> ioctl: Invalid argument (22)
>>
>> What am I doing wrong here?
>>
>>
>> ------------------------------------
>>
>> Yahoo! Groups Links
>>
>>
>>
>
>
> --tQNFdI7EwZjzC8XkwQTWP68hmqpSw6bUnW9rLll
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> <p>Matthew Harrell wrote:<br>
> > I have one of the 7260 boards and use my own build from the
> linux-2.6.21-<wbr>ts<br>
> > source tree. I have the RS-485 option on my board which, according to
> the<br>
> > docs, should put it on ttyAM1. According to the manuals
> (ts-7260-manual<br>
> > section 5.5 and arm-linux-ts72xx section 6.3) it looks like I need to
> do<br>
> > something like<br>
> > <br>
> > #include <asm/ioctls.<wbr>h><br>
> > #include <sys/ioctl.h><br>
> > <br>
> > #define TIOC_SBCC485 _IOW('T',0x70,<wbr>int) /*TS RTS/485 mode
> Clear*/<br>
> > #define TIOC_SBCS485 _IOW('T',0x71, int) /*TS RTS/485 mode Set */<br>
><br>
> ^^^<br>
> You have to pass an int, not a char<br>
> > <br>
> > // open socket above here<br>
> > <br>
> > char mcr = 5;<br>
><br>
> int mcr = 5;<br>
><br>
> Regards,<br>
> Chris<br>
><br>
> > <br>
> > if ( -1 == ioctl ( _sock, TIOC_SBCS485, &mcr ) )<br>
> > cerr << "ioctl: " << strerror ( errno )
> << " (" << errno << ")" <<
> endl;<br>
> > <br>
> > to get a half-duplex RS485 at 19200 baud. When I try this, though, I
> get<br>
> > the error<br>
> > <br>
> > ioctl: Invalid argument (22)<br>
> > <br>
> > What am I doing wrong here?<br>
> > <br>
> > <br>
> > ------------<wbr>---------<wbr>---------<wbr>------<br>
> > <br>
> > Yahoo! Groups Links<br>
> > <br>
> > <br>
> > <br>
><br>
></p>
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> --tQNFdI7EwZjzC8XkwQTWP68hmqpSw6bUnW9rLll--
>
--
Matthew Harrell Rome did not create a great empire
Bit Twiddlers, Inc. by having meetings - they did it by
killing all those who opposed them.
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