ACC-72EX User Manual
DPRAM Data Processing
66
Time-Related View
The following figure shows the procedure in a time-related view.
Output Data Exchange
1.
The protocol stack constantly transmits data from the buffer to the network.
2.
The application has control over the dual-port memory and can copy data to the output data
image.
3.
The application then toggles the handshake bits, giving control over the dual-port memory to the
protocol stack.
4.
The protocol stack copies the content of the output data image into the internal OUT buffer.
5.
The protocol stack toggles the handshake bits, giving control back to the application.
6.
Once updated, the protocol stack uses the new data from the internal buffer and sends it to the
network. The cycle repeats with step 1.
Input Data Exchange
1.
The protocol stack constantly receives data from the network into the buffer.
2.
The application has control over the dual-port memory input data image and exchanges data with
the input data image in the dual-port memory.
3.
The application then toggles the handshake bits, giving control over the dual-port memory to the
netX protocol stack.
4.
The protocol stack copies the latest content of the internal IN buffer to the input data image of the
dual-port memory.
5.
The protocol stack then toggles the handshake bits, giving control back to the application.
1.
The protocol stack receives data from the network into the buffer (i.e. the cycle starts over with
the first step).
