I'm trying to communicate with an Arduino micro-controller. This is very easy to do in C#, but I can't figure it out in c++. Here is my arduino code...
void loop()
{
if (Serial.available() > 0)
{
byte input = Serial.read();
Serial.write(input);
}
}
So anything you send to the arduino will just get sent back to you.
I am able to read an write to it using the fstream library. The problem is when I try to read from the buffer and nothing is there.
int main(int argc, char** argv)
{
fstream filestr;
filestr.open ("COM4", fstream::in | fstream::out | fstream::trunc);
if (!filestr.is_open())
{
cout << "error opening port";
}
else
{
cout << "port opened";
}
char* input = new char();
cin >> input;
filestr.write(input, 1);
filestr.flush();
char * buffer = new char [1];
buffer[0] = -1;
filestr.read (buffer,1);
while ((int)buffer[0] == -1)
{
filestr.read (buffer,1);
}
cout << buffer[0];
cin >> input;
filestr.close();
return 0;
}
So I send it some data and start reading in a loop until the arduino responds back. The very first read wont get anything back because the arduino hasn't had time to respond, so I keep reading until it does get data. But I seem to never get a response. It does work if I put a small delay before the first read and give the arduino time to respond. Does the position of the reader move forward when I read something? When I read something from the buffer does it automatically get deleted from the buffer? Anyone know how to do this?
