User's Manual

Waveport CF user manuel Coronis Systems
5.5 Multi-frame mode
From the user's perspective, multi-frame mode is used only for reception. That is, Waveport CF they can
receive data in multi-frame mode but they cannot transmit.
Restrictions for using multi-frame mode:
• Waveport CF does not currently offer multi-frame mode between two
Waveport CF/Waveport modules.
• Current firmware version does not allow multi-frame mode operation
via repeaters.
5.5.1 Overview
Waveport CF equipment can manage reception of successive frames sent by a remote module. Data is first
stored in internal memory, then transferred to the host module via serial link when RF reception is complete.
Depending on the quantity of data to transmit, multi-frame operation is initiated by remote modules following a
point-to-point request from a Waveport CF module.
5.5.2 Received frame format
• Multi-frame reception – 0x36
RECEIVED_MULTIFRAME
HEADER CMD DATA CRC ETX
3 bytes 1 byte 1 byte 1 byte 1 byte 6 bytes variable 2 bytes 1 byte
0xFF ; 0x02 ;
0xXX
0x36 Status
Total number
of frames
received
Frames
index
Radio address of
the response
transmitter
Received data
152 bytes
max.
0x03
Status = 0: reception OK
= 1: indicates that the number of received responses is higher than 255. In
this case, only the first 255 responses are forwarded to the host.
Frame index This index is used by the Waveport CF to know how many responses are to
be forwarded to the host. This index is decremented on low-level
acknowledgement when the Waveport CF send a response to its host.
The host knows that all responses have been sent when the frame index is
1. By ensuring that this value is properly decremented with each received
frame, this index is also used to confirm that no frames were lost.
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