This function opens a port for communication.

Syntax

int ComOpen(
  int port
);

Parameters

port

[in] Specifies which communications port is to be opened.
See the table below for details.

Value	Description
COM3	Bluetooth SPP (Master)
COM4	Bluetooth HID (Slave)
COM5	Bluetooth SPP (Slave)
COM9	USB VCP
COM10	USB HID

Other COM ports are reserved for the system for OS or extension.
The default communication settings are different for each communication / boat number.
Set by calling the SetConfig function.

Return value

The function ends normally (OK) or returns a port specification error (ERROR).

Remarks

You cannot open multiple COM ports at the same time.
When a comport is opened the power consumption may increase,
so use the ComClose function when communication is no longer needed.

Requirements

Header file:

lib.h

Library file:

libSTARTUPOPH5000.a

Sample

#include <stdio.h>
#include "lib.h"

void main(void)
{
    int ch;

    ComOpen(COM9); // Open the COM port
    for(;;)
    {
        if ((ch=GetCom(0)) != -1)
        {
            putchar(ch);
        }
        if ((ch=getchar())!=EOF)
        {
            PutCom(ch);
        }
        Idle(); // Very important to lower the power consumption
    }
}