wang-borong / libtty

A library of tty

libtty

The library of tty which make uart programming simple.

---

simtty.py

The simtty.py is used to simulate two virtual ttys for testing the library.

usage

#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "tty.h"

int main(int argc, char const* argv[])
{
    int i;
    int len;
    char rcvbuf[128] = {0};
    char *sendbuf = "hello world, from orangepi!";
    tty_t *tty;
    tty_attrs_t attrs;

    if (argc < 3) {
            printf("%s [-r|-s] <tty path>\n", argv[0]);
            goto err;
    }

    attrs.speed     = B115200;
    attrs.flow_ctrl = 0;
    attrs.databits  = 8;
    attrs.stopbits  = 1;
    attrs.parity    = 'N';

    tty = tty_open(argv[2], attrs);
    if (!tty) {
            printf("tty_open failed\n");
            tty_close(tty);
            goto err;
    }

    if (!strcmp(argv[1], "-s")) {
            for(i = 0; i < 10; i++) {
                    len = tty_send(tty, sendbuf, strlen(sendbuf));
                    if (len > 0)
                            printf(" %d time send %d data successful\n", i, len);
                    else
                            printf("send data failed!\n");

                    sleep(1);
            }
    } else {
            for(i = 0; i < 1; i++) {
                    len = tty_recv(tty, rcvbuf, 127, 10);
                    if(len > 0) {
                            rcvbuf[len] = '\0';
                            printf("receive data is %s\n", rcvbuf);
                            printf("len = %d\n", len);
                    } else {
                            printf("cannot receive data\n");
                    }
            }
    }

    tty_close(tty);
    return 0;
err:
    return -1;
}