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#Reading wmv on mac matlab serial
#Reading wmv on mac matlab code
#Reading wmv on mac matlab Pc

it sends a new value every single millisecond.

#Reading wmv on mac matlab serial

But my instrument at full whack sends a data point to the serial line at 1000Hz, i.e. If it only send a value every 5s as above, no problem, keep the above mode. My program want to receive these packets and display that on a curve or a digital display. I put it in a mode where it will constantly send measurements to the serial line. Now let's unleash the full power of my instrument. (opens new window) # Mode 3: Streaming ( Real time) Only when a message arrives, it activates a function which will then read and process this message.

#Reading wmv on mac matlab Pc

The PC does not wait permanently for a message to process. Summary: In this mode, the instrument may send message to the serial line at anytime (but not necessarily all the time).

#Reading wmv on mac matlab code

The rest of the time the GUI can execute any other code it has to run.

keep this function in a corner, it will only be called and executed when a message arrives on the serial line.

define a separate function which tells your program what to do when a message is received.

Fortunately, the asynchronous communication mode will let you: Unless you have a fancy way of controlling your GUI from the instrument, this is something to avoid. Essentially, it became the Slave and the instrument is the Master. If the main program is a GUI, it is highly frustrating to have a GUI seemingly "frozen" because it won't accept any input from the user. but it cannot do anything else in the meantime. If your main program (or GUI) is constantly "waiting" for message arriving on the serial line, it can do that well. As long as the inclination is above the threshold, it continues to send an inclination reading every 5s. If the device is tilted by more than 15 degrees and get close to horizontal, it sends an alarm message to the serial line, immediately followed by a reading of the inclination. It constantly monitor it's own inclination and as long as it is vertical (within a tolerance, let's say +/-15 degrees), it stays silent. Now suppose I started my instrument, but it is more than just a dumb sensor. (opens new window) # Mode 2: Asynchronous Summary: in this mode, the instrument (the Slave) only send data to the serial line immediately after having been asked by the PC (the Master) This is commonly called an ACK/NACK reply (for "Acknowledge(d)" / "NOT Acknowledged").

The instrument receive the command, execute it, then send a confirmation message back to the serial line: " Command executed" (or " Command NOT executed").

The PC sends a command: "Change from mode X to mode Y".

The instrument receive the command, take the measurement then send back the measurement value to the serial line: "The inclinometer value is XXX".

The PC sends a command: "Give me a measurement now".

The instrument does not send anything to the serial port on it's own, it only replies an answer after being asked a question/command by the Master (the PC, your program). It correspond to the case where the PC is the Master and the instrument is the slave.

For the 3 examples, the instrument I am connecting to is a circuit board with an inclinometer, which can work in the 3 modes I will be describing below. I'll define 3 different cases to illustrate, from the simplest to the most demanding. what other functions your main program (or GUI) will have to do aside from managing the serial port.how the instrument you are communicating with behave.It is important to chose the right communication mode. Matlab supports synchronous and asynchronous communication with a serial port. InputBufferSize = 1000000 % Open serial port fopen (s ) # Chosing your communication mode S = serial ( '/dev/ttyusb0', 'BaudRate' ,rate ) end % Set the input buffer size to 1,000,000 bytes (default: 512 bytes). S = serial ( '/dev/tty.usbserial-A104VFT7', 'BaudRate' ,rate ) elseif isunix You will % have to look at /dev/tty.* to discover the exact signature of your % serial device % Note that on OSX the serial device is uniquely enumerated. S = serial ( 'COM1', 'BaudRate' ,rate ) elseif ismac % Define serial port with a baud rate of 115200 Automatically processing data received from a serial port.

Closing a serial port even if lost, deleted or overwritten.Creating a serial port on Mac/Linux/Windows.Ordinary Differential Equations (ODE) Solvers.Fourier Transforms and Inverse Fourier Transforms.