Measurement Computing CB-NAP-7000P - Manual (Page 28)

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6 7000W31.DLL for Windows 3.1
6.1 Open_Com
Description:
This DLL will initialize the COM port. This DLL must be called once before the other DLLs are called to
send/receive command.
z Syntax:
WORD Open_Com(char cPort, DWORD dwBaudRate, char cData, char cParity, char cStop)
z Input Parameter:
cPort: 1=COM1, 2=COM2, 3=COM3, 4=COM4, others = invalidate
dwBaudRate: 1200/2400/4800/9600/19200/38400/57600/115200
cData: 5/6/7/8 data bit
cParity: 0=NonParity, 1=OddParity, 2=EvenParity
cStop: 0=1-stop, 1=1.5-stp, 2=2-stop
NOTE: cData=8, cParity=0, cStop=0 for CB-7000 modules
z Return Value:
NoError = OK
others = Error code, refer to 7000W31.H
6.2 Close_Com
Description:
This DLL will free all the resources used by Open_Com. This DLL must be called before the program exit. The
Open_Com will return error message if the program exit without calling Close_Com function.
z Syntax:
WORD Close_Com(char cPort)
z Input Parameter:
cPort : 1=COM1, 2=COM2, 3=COM3, 4=COM4, others = invalidate
z Return Value:
NoError = OK
others = Error code, refer to 7000W31.H
z Demo Program: