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11 years, 3 months ago.
mbed callbacks and C#
Hi,
I have a small program in mbed running nice.
I would like to connect to the mbed device through a C# based application and register/hook to a function so I would be able to execute callbacks in C# when an event/function is called on the mbed application.
I'm sure there is a way to do this, I just couldn't find a decent example.
Anyone?
Gilad
3 Answers
11 years, 3 months ago.
Probably easiest is to just use the virtual COM-port of the mbed (so the USB connector), when something needs to happen in your C# application the mbed sends a serial message which your program receives and acts on. Never used C#, but I expect that to be fairly straightforward. Instead of the virtual COM-port you can also use the LPC's USB pins, either also as serial connection or as USB HID connection.
9 years, 2 months ago.
Yes in C# you can keep listening to the serial port with a loop (but be aware is resource consuming). Then you serial facade can easily fire events that you will subscribe to in C#.
Dummy serial class
class SerialReader{
event EventArgs<MyEventArg> MessageReceived;
public SerialReader(){
// init your com communication
SerialPort mySerialPort = new SerialPort("COM1");
// later an event callback
mySerialPort.DataReceived += (sender, args) => {
// if somebody subscribed
if(MessageReceived != null){
// read the serial output
SerialPort sp = (SerialPort)sender;
string indata = sp.ReadExisting();
// raise an event
MessageReceived( new MyEventArgs
{
Message = data
});
}
}
}
}
9 years, 2 months ago.
Just to add to what Erik and Raffaele have said already, you could use the HidLibrary which wraps around the Windows USB HID calls https://github.com/mikeobrien/HidLibrary or if you want to put yourself into a little more trouble, you could use LibUsbDotNet which is actually wrapping around the LibUSB library. http://libusbdotnet.sourceforge.net/V2/Index.html I have successfully used LibUsbDotNet in the past and all I had was to follow. Note that LibUsbDotNet can be used with the Mono Framework in Linux too (or Windows)