tcp/ip receive simulink with tof camera mesa sr4500

Question

i got a problem with receiving a raw data stream from the lan connection of a time of flight camera (mesa sr4500) to my pc via simulink. the ip adress and the port of the simulink block tcp/ip receive seems to be chosen correctly (it is the ip adress and port of my network card). here's a picture of the further settings of the simulink block:

remote address: 192.168.1.1
port : 139
data size: [25344 1] -> should receive an array of this size due to the image resolution
data type uint16 -> each pixel of the camera is encoded with 16 bits
bye order: BigEndian
enable blocking mode is turned on
timeout: 10 (seconds)
block sample time: 0.1 (seconds) -> camera fps = 10

and this is the error msg, that i'm receiving.

Block error -> Error evaluating registered method 'outputs' of MATLAB S-Function 'stciprb' in 'decoding/TCP/IP Receive'

Caused by: The specified amount of data was not returned within the Timeout period. Please ensure that data is being sent to the specified port of specify a greater timeout value.

i think a greater timeout wouldnt help, because the camera is already streaming with 10 fps. so the timeout should be long enough.

have i misunderstood any of the setting options? has someone worked with a similar camera?

Answer 1

Since you're getting Timeout error, it's probably, because Simulink doesn't see your camera, so either you have assigned the wrong IP address or port in the TCP/IP Receive block. The IP address and port of your network card (by that I presume you meant network card of your PC?) won't work, you need to assign IP of the camera.

Open TCP/IP Receive block and click Verify address and port connectivity, with that you'll get the output message whether Simulink sees your camera's IP and port. By the way I see you have set your port to 139 (that's port for NetBIOS session services). I don't know if your camera uses some special dedicated port (for example some cameras with very low fps send pictures through FTP on port 20, but with 10 fps I doubt that's the case with your camera?). Try to assign a free port (i.e. number between 1024 and 65536).