[ts-7000] Re: 485 half duplex communication error

["khouryelie" <>]

thank you Jim for your reply,

1. this is my actual code 


int main(void)
{

        int fd;
        int status,val,prev;

        fd = open("/dev/tts/5", O_RDWR | O_SYNC);
        if (fd == -1) 
        {
                perror("Error opening file for writing");
        }

        ioctl(fd, TIOCMGET, &status);
        
        prev = TIOCM_RTS;
        status &= ~TIOCM_RTS;

        val=(ioctl(fd, TIOCMSET, &status));
        if (val != 0)
                printf("Error ioctl");

2. i am actually always having negative 5 6 on rts 

can you guide me from here ?

why can i send if it was at start negative 5 at RTS 
it makes no sens



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