Kontron KTAM3874-pITX - Manual (Page 89)

KTD-S0057-I Page 85 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
int rts_transmit_control (int tx_enable)
{
char dev [64];
char str [16];
sprintf (dev, dev_val, GP2_3);
sprintf (str, "%d", tx_enable);
if (update_device (dev, str, TRUE))
return -1;
return 0;
}
int init_uart_interface (int baudrate)
{
struct
termios new_values;
fd = open (device, O_RDWR | O_NOCTTY);
if (fd < 0 )
return -1;
if (tcflush (fd, TCIOFLUSH))
return -1;
switch (baudrate)
{
case 300 : baudrate = B300; break;
case 600 : baudrate = B600; break;
case 1200 : baudrate = B1200; break;
case 2400 : baudrate = B2400; break;
case 4800 : baudrate = B4800; break;
case 9600 : baudrate = B9600; break;
case 19200 : baudrate = B19200; break;
case 38400 : baudrate = B38400; break;
case 57600 : baudrate = B57600; break;
case 115200 : baudrate = B115200; break;
default : return -1;
}
memset (&new_values, 0, sizeof (new_values));
new_values.c_cflag = CS8 | CLOCAL | CREAD;
new_values.c_iflag = IGNBRK | ICRNL;
new_values.c_lflag = ICANON;
new_values.c_cc[VMIN] = 1;
if (cfsetispeed (&new_values, baudrate))
return -1;
if (cfsetospeed (&new_values, baudrate))
return -1;
return tcsetattr (fd, TCSANOW, &new_values);
}