Manual Texas Instruments eZ430-Chronos (page 57 of 113) (English)

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eZ430-Chronos Software Projects

3.6.6.1.2 Control Center DLL

The sources for the DLL are available in the eZ430-Chronos Windows package and can be found in

C:\Program Files\Texas Instruments\eZ430-Chronos\Control Center\GUI Sources\DLL.

The eZ430-Chronos Windows DLL has been developed using Microsoft Visual C++ 2008 Express Edition.

In order to rebuild the DLL file the Microsoft Visual Studio must be installed, since the registry enumeration

code uses MFC functions. If Microsoft Visual Studio is not present, it is still possible to rebuild the DLL, but

the "enumser" source code part needs to be removed from the project. Therefore, the BM_GetCOM()

function won’t work anymore.

The DLL has two interface sections, one that exports standard C functions, and a second one exporting

TCL-compliant functions. These TCL-compliant functions are used by the graphical user interface. Hence,

when compiling the DLL, TCL needs to be present in the default directory (C:\Tcl); otherwise, the

reference to the TCL libraries (tcl85.lib, tclstub85.lib) is invalid. If the DLL is compiled without the TCL

interface, the respective source code file and the references to the TCL libraries must be deleted.

COM Port Management

1. Opening the COM port

Prior to any communication, the COM port where the RF access point is connected must be opened.

The hardware is powered up immediately after the unit is connected. Some parts of the hardware

require a startup time of several hundred milliseconds. As a result, any access to the hardware should

not be done within one second after connecting the device.

NOTE: To address COM ports higher than COM9 in Windows, precede the "COMxx" string with the

sequence "\\.\".

The COM port is opened with the following function:

bool BM_OpenCOM( char * strPortName,

DWORD dwBaudrate = 115200,

WORD wTimeout = 30,

bool bRTS = false,

bool bDTR = false);

Parameters

strPortName

Name of the COM port (for example, "\\.\COM11").

wTimeout

Time in milliseconds a reply to a command is expected; default value is 30 ms, should not be

changed

dwBaudrate

Baudrate for the serial interface; default is 115200 Baud, should not be changed

bRTS

State of RTS line during normal operation; default is false (=GND), should not be changed

bDTR

State of DTR line during normal operation; default is false (=GND), should not be changed

Return Value

Returns true if COM port could be opened, otherwise returns false.

2. Closing the COM port

A successfully opened COM port must be closed when quitting the application to release all allocated

memory and the port itself.

The COM port is closed with the following function:

void BM_CloseCOM(void);

SLAU292D–November 2009–Revised March 2011 eZ430-Chronos Software

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Texas Instruments eZ430-Chronos Manual

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