Re: Set/reset DTR

[Linux Lists]

On Fri, 29 Oct 1999, Thomas Thissen wrote:
>
> I have a simple Problem:
> 
> how do I set the DTR pin to High or Low in a C program?

You'll need to make this code safe, but:

int fd;
unsigned long i;

(...)
/* Device already open */
(...)

i = TIOCM_DTR;
/* Set DTR */
ioctl(fd, TIOCMBIS, &i);
/* Reset DTR */
ioctl(fd, TIOCMBIC, &i);

HTH.

Regards,
Ivan


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