| Target Support Package™ TC6 | |
C6000 DSP Communication Library in Target Support Package TC6 software
This block configures the Ethernet driver on the target to receive UDP messages. A UDP message comes into this block from the transport layer, usually TCP/IP. The block passes the message to the next downstream block out the Msg port. One block output (Msg) is the data vector from the message. A second output is a flag that indicates when a new UDP message is available. A third output specifies the length of the message for variable length messages.
To use this block with the C6416, or C6713 DSK targets, you must meet the following requirements.
Install the D.signT DSK-91C111 Ethernet adapter daughter card.
Configure the daughter card. Refer to Configuring the D.signT DSK-91C111 to Use TCP/IP and UDP for more information about configuring the card.
Install the Texas Instruments TMS320C6000 TCP/IP stack software.
This block reads a single UDP packet every sample hit. It does not attempt to receive multiple UDP packets to fill the output vector. If the UDP packet size is greater than the output port width parameter, UDP messages at the Msg port are truncated. The part for the UDP packet that does not fit into the Msg port is discarded as a result. The missing message content cannot be retrieved. Conversely, if the UDP packet size is smaller than the Msg port width specified, the portion of the output vector that does not fit into the specified size is invalid data.
In non blocking mode, the data in the Msg port is not valid unless the block issues a function call.
C6000 UDP Receive blocks operate only to generate code for the target Ethernet driver. They do not perform any function in simulation and their simulation outputs are zeros.
Note To use the C6000 UDP Send and C6000 UDP Receive blocks, you must include the C6000 IP Config block to configure the Ethernet parameters for the target network. This block sets up the IP drivers for use and must be in the model for network-related processing. |
Additional options let you decide whether the UDP messages work in blocking mode and set the sampling time for polling for new messages.
Specifies the IP address from which the block accepts messages. Setting the address 0.0.0.0 configures the block to accept messages from any IP address. Setting a specific address, not 0.0.0.0, directs the block to accept messages from the specified address only.
Selecting Enable blocking mode, disables the IP address to receive from parameter. As a result, the block accepts messages from any IP address. You must clear Enable blocking mode to be able to set IP address to receive from to any value other than 0.0.0.0. The block must be in non blocking mode to specify the address to receive messages from via UDP.
Specify the port on this machine from which the block accepts messages. The other end of the communication, usually a UDP Send block, sends messages to this port. The value defaults to 25000, but the values can range from 1 to 65535.
Specifies the width of messages that the block accepts. When you design the transmit end of the UDP communication channel, you decide the message width. Set this parameter to a value as large or larger than any message you expect to receive.
Specify the size of the buffer in which UDP messages are stored when received. 8192 bytes is the default size. You need a buffer large enough to store UDP messages that come in while your process reads a message from the buffer or performs other tasks. Specifying the buffer size prevents the receive buffer from overflowing.
Select this option to put the UDP receive process in blocking mode meaning the block outputs received messages before accepting input new messages. In blocking mode, program execution for receiving data stops until data in the buffer is sent. In non blocking mode, the block receives data or sends data at any time. Processes do not wait for data.
Use this option to specify when the block polls for new messages. The value entered here should always be greater than zero. Setting this to a specific value, often large, can reduce the chances of UDP messages getting dropped. The default sample time is 0.01 seconds.
C6000 TCP/IP Receive, C6000 TCP/IP Send, C6000 UDP Send
| C6000 TCP/IP Send | C6000 UDP Send | |
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