Eurotech BoltGATE 20-25, Руководство пользователя

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10 How to Access the Interfaces Under Linux BoltGATE 20-25 User Manual Rev. 1-1
Example: Configuring a serial port in RS-485 mode
ser_port_name
can be either
/dev/APP0
or
/dev/APP1
.
struct serial_rs485 rs485conf;
rs485conf.flags=ETH_SER_MODE_RS485
//INSERT THE TERMINATION
rs485conf.flags|=ETH_SER_PORT_TERM
//INSERT CHARACTERS DELAY AFTER SEND
rs485conf.flags|=ETH_SET_RS485_DELAY
rs485conf.delay_rts_after_send=10
int fd;
fd=open(ser_port_name,O_RDWR);
if (fd==-1)
{
/* process the error */
…
}
/* apply changes */
if (ioctl (fd, TIOCSRS485, & rs485conf) < 0)
{
/* process the error */
…
}
close(fd);
10.7.2 How to Test a Serial Port
To test the serial port, use the microcom utility:
#connect ttyCOM1 with a baud rate of 9600
microcom /dev/ttyCOM1 –s 9600
The microcom utility:
l
Allows you to transmit/receive data to/from the serial port
l
Does not include a local echo (you cannot see the sent data).
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