MCP2200_13 datasheet(17/44 Pages) MICROCHIP

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DS22228B-page 17

MCP2200

2.3.1.11

GetDeviceInfo

Function:

String^ SimpleIOClass::GetDeviceInfo (unsigned int uiDeviceNo)

EXAMPLE 2-11:

2.3.1.12

GetNoOfDevices

Function:

unsigned int SimpleIOClass::GetNoOfDevices(void)

EXAMPLE 2-12:

2.3.1.13

GetSelectedDevice

Function:

int SimpleIOClass::GetSelectedDevice(void)

Summary:

Returns the path name for one of the connected devices.

Description:

The function will return the path name for the given device ID.

Precondition:

At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible

devices.

VID and PID must be previously set via a call to InitMCP2200(VID, PID).

Parameters:

uiDeviceNo:

The device ID for which the path information is needed. Can have a value between 0

and the number of devices minus 1.

Returns:

This function returns a string containing the path name of the given device id.

• In the case the given ID is out of range, the function will return the “Device Index Error” string.

• In the case the device for which the path name is required is not connected anymore, the return

string will be “Device Not Connected”.

Remarks:

None.

Summary:

The function returns the number of available devices present in the system.

Description:

The function returns the number of HID devices (with the given VID/PID) connected to the system.

Precondition:

At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible

devices. Also, in order to know the actual number of devices connected to the system, call the

SimpleIOClass::IsConnected()

function. VID and PID must be previously set via a call to

InitMCP2200(VID, PID)

Parameters:

None.

Returns:

This function returns the number of HID devices with the given VID/PID (as parameters of

SimpleIOClass::InitMCP2200()

function).

Remarks:

Call the SimpleIOClass::IsConnected() prior to the call of this function in order to have the most

recent number of devices that are present in the system.

Summary:

Returns the ID of the selected device

Description:

The function returns the ID of the current selected device.

Precondition:

At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible

devices. VID and PID must be previously set via a call to InitMCP2200(VID, PID).

Parameters:

None.

Returns:

This function returns the ID of the current selected device. Its value can range from 0 to the number of

devices minus 1.

Remarks:

None.

lblStatusBar->Text = SimpleIOClass::GetDeviceInfo(0);

SimpleIOClass::IsConnected(); //call this function to refresh the number of

//the devices present in the system

lblStatusBar->Text = SimpleIOClass::GetNoOfDevices();

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