Re: [ts-7000] RS486 and linux-2.6.21-ts

[Christian Gagneraud <>]

Matthew Harrell wrote:
> I have one of the 7260 boards and use my own build from the linux-2.6.21-ts
> source tree.  I have the RS-485 option on my board which, according to the
> docs, should put it on ttyAM1.  According to the manuals (ts-7260-manual
> section 5.5 and arm-linux-ts72xx section 6.3) it looks like I need to do
> something like
> 
>   #include <asm/ioctls.h>
>   #include <sys/ioctl.h>
> 
>   #define TIOC_SBCC485 _IOW('T',0x70,int) /*TS RTS/485 mode Clear*/
>   #define TIOC_SBCS485 _IOW('T',0x71, int) /*TS RTS/485 mode Set */

                                         ^^^
                            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
> 
> 
> 



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