參數(shù)資料
型號(hào)： MCP2200-I/MQ
廠商： Microchip Technology
文件頁(yè)數(shù)： 9/44頁(yè)
文件大?。?/td> 0K
描述： IC USB TO UART 20QFN
特色產(chǎn)品： MCP2200 USB-to-UART Serial Converter
標(biāo)準(zhǔn)包裝： 73
特點(diǎn)： USB 至 UART
通道數(shù)： 8
FIFO's： 256 字節(jié)
規(guī)程： USB 2.0
電源電壓： 3 V ~ 5.5 V
帶自動(dòng)流量控制功能： 是
安裝類型： 表面貼裝
封裝/外殼： 20-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-VQFN
包裝： 管件
產(chǎn)品目錄頁(yè)面： 684 (CN2011-ZH PDF)
2011 Microchip Technology Inc.
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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