Advantech ADAM-4500 user manual Commexit, Commopen

Syntax:

int comm_init(int buf_size)

Function description:

Initializes the communication port and interrupt routine before other function calls use the communication port.

Parameter	Description
int buf_size	Sets the buffer size of every communication port for storage of
	received	data. The unit of size is bytes.

Return:

Returns a 1 if command succeeds. Returns a 0 if it fails.

comm_exit

Syntax:

int comm_exit()

Function Description:

If a user calls the comm_init function, the user must call this function to release the communication port before the user's program terminates.

Return:

Returns a 1 if command succeeds. Return a 0 if it fails.

comm_open

Syntax:

int comm_open(unsigned char port, unsigned long baud, int parity, int data, int stop, int cmd_type)

Function Description:

To open a communication port for user to send and receive data.

Parameter	Description
unsigned char port	Specifies communication port.
	1: COM1 port
	2: COM2 port
unsigned long baud	Baud rate setting. The eight allowable baud rates are: 1200,
	2400, 4800, 9600, 19200, 38400, 57600, and 115200. Sized in bps
	(bits per second).
int parity	Parity setting.
	0: no parity, 1: odd, 2: even
int data	Data bits setting. There are four allowable data lengths: 8, 7, 6,
	and 5.	Sized in bit units.