TDT RZ2, Manual

Page: 86 / 736

1-80 System 3
RZ-UDP Communications Interface
Receiving Scalar Data Construct
When data is received, the NewPack signal will output a logic high (1) for one
sample denoting that a packet header has been found. As data is being received,
the Busy signal will output logic high (1). The Busy signal will then remain high
until the entire packet has been received. The duration of the busy signal is
dependent on the number of channels (packet size).
If reset goes high (1) at any time, receiving data is halted and the macro will wait
until a new header is found. Any data that was received will still be available on the
multi-channel output.
Note: Since the channels are received serially, all channels are not received at the same
time. Data received in later channels occurred several samples before it is available
on the Output.
In this example, whenever a packet header is detected the Block_Store_MC macro
saves the specified packet size as a single block. The Block_Store_MC macro is
configured for 16 channels of 32-bit floats.
Note: To modify the number of channels received, edit the Packet Size parameter found in
the RZ_UDP_Rec macro setup properties. Remember to also edit the number of
channels in the Block_Store_MC macro.
Serial Circuit Design
Access to the Serial interface is provided through two RPvdsEx macros:
RZ_Serial_Send and RZ_Serial_Rec. Both macros operate on multi-channel data and
can be configured to specify the number of channels. This channel count corresponds
to the size of the underlying serial stream.