F2838x-M4 TCP Receive
Receive data over TCP/IP network from remote host
Embedded Coder Support Package for Texas Instruments C2000 Processors / F2838x / M4
The TCP Receive block receives data from a remote host or other target hardware over a network. The server(client mode) must be up and running before deploying the model that contains the TCP Receive block to the target.
The block outputs data either in blocking mode or in non-blocking mode. In blocking mode, the model blocks the execution while it waits for the requested data to be available. In non-blocking mode, the model runs continuously. To set the block in blocking mode, select the Wait until data received option.
At each time step, the Data port outputs data as a vector of the size specified in the Data size (N) parameter. The Status port outputs 0 or a nonzero value indicating whether new data is received. 0 at the Status port indicates that a valid data is received.
Your antivirus software or firewall might block TCP traffic. Configure the software to allow traffic from a specific IP port number.
Due to RAM memory limitations on the F2838x(ARM Cortex-M4), loading application to RAM is not supported for this block.
CPU Timer 2 of F2838x Arm Cortex-M core (Connectivity Manager) provides time base to lwIP stack. It is configured to trigger an interrupt every 1 ms. This timer should not be re-configured if Ethernet blocks are being used in the model. If the corresponding interrupt is armed through Hardware Interrupt block, it will run the interrupt handler every 1 ms.
Data — Output data
At each time step, the port outputs data as a vector of the size specified in the Data size (N) parameter.
Status — Requested data received at given time step
The port outputs
0 if the data is received at a given time
step. Otherwise, it outputs a nonzero value, indicating that no new data is
Connection mode — Set the block as server or client
Server (default) |
Set the block as TCP/IP server or client.
When you set connection mode parameter to
Server, provide a
Local IP Port. The local port acts as the listening port on the
When you set connection mode parameter to
Client, provide the
Server IP Address and the Server IP Port
of the TCP/IP server from which you want to receive the data.
Local IP Port — IP port on receiving host from which data is received
25000 (default) | positive integer in the range [1,65535]
This local port number acts as a listening port on the TCP/IP server. Match the local port number with the remote port number of the sending host.
Server IP Address — Remote IP address of server from which data is received
192.168.1.10 (default) | any valid IP address
Specify the IP address of the sending server from which the data is received.
This parameter appears only when Connection mode parameter
is set to
Server IP Port — Remote IP port on server from which data is received
25002 (default) | positive integer in the range [1,65535]
Specify port number on the sending server from which data is received.
This parameter appears only when Connection mode is set to
Data type — Data type of received data
uint8 (default) |
Select the data type of the elements in the TCP data received by the block. The size of each element depends on its data type.
Data size (N) — Number of data bytes in received data
1 (default) | positive integer
Specify number of data bytes to receive at each time step.
Wait until data received — Wait until requested data is available
on (default) |
on— When you select this parameter, the read operation runs in the blocking mode. The read operation is blocked when the block is waiting for the requested data. If data is available, the block outputs the data. If data is not available, the block waits for the data.
A task overrun occurs if the target hardware is still waiting for the data when the next read operation begins.
To fix overruns, increase the time step by using the Sample time parameter.
off— When you clear this parameter, the read operation runs in the nonblocking mode. When reading data, if data is not available, the block contains the packet received in the previous time step (the block outputs 0). In this mode, the block does not wait for the requested data to be available.
Sample time — Interval at which block reads data from sending host
0.1 (default) | nonnegative value
Specify how often the block should read the port buffer. Enter a value greater
-1 (for inherited sample time).
This value defaults to a sample time of
0.1 seconds. Smaller
values require the processor to complete the same number of instructions in less time,
and this can cause task overruns.