Moxa M-1401 Manual descargar pdf (Pagina 27)

ioLogik MXIO DLL API Reference System Commands Sets

4-2

RS-232/RS-485 I/O Connect Commands

MXSIO_OpenCommport

This function opens the local COM port of the host computer with

communication parameters.

C/C++

Arguments

Return Value

int MXSIO_OpenCommport ( char *szCommport,

DWORD dwBaudrate,

BYTE bytDataFormat,

DWORD dwTimeout,

int * hCommport);

szCommport: Name of the common port, e.g., “ttyM0”.

dwBaudrate: Baudrate, from 4,800 to 115,200 bps. Does not

support 1200 or 2400 bps.

bytDataFormat: Transmission data format.

bit_cnt

(bit

= 0x00

bit_5

0x01

bit_6

0x02

bit_7

0x03

bit_8

stop_cnt

(bit

0x00

stop_1

0x04

stop_2

parity

(bit

0x00

none

0x08

odd

0x18

even

0x28

mark

0x38

space

dwTimeout: Timeout in milliseconds for serial adapter

communication

hCommport: Handle of the opened COM port.

Succeed MXIO_OK.

Fail Refer to Return Codes.

MXSIO_CloseCommport

This closes the COM port; the COM port handle will be invalid.

C/C++

Arguments

Return Value

int MXSIO_CloseCommport ( int hCommport);

hCommport: Handle of the opened COM port.

Succeed MXIO_OK.

Fail Refer to Return Codes.

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