Coronis Wavenis Wavecard - Page 45

Wavecard-Waveport User Manual Coronis Systems
The formats of frame types received by the host are:
• Message mode request
REQ_SEND_MESSAGE
HEADER CMD DATA CRC ETX
3 bytes 1 byte 6 bytes variable 2 bytes 1 byte
0xFF ; 0x02 ;
0xXX
0x22
Radio address of
target module
n bytes of data to transmit
Maximum size ( N bytes) is defined below
0x03
Defining maximum size
• Point to Point mode Max = 152 bytes of data
• Relay mode: Max = 152 – (2 + 6 x Number of repeaters)
=> 1 repeater: 144 bytes of data
=> 2 repeaters: 138 bytes of data
=> 3 repeaters: 132 bytes of data
• Request acknowledgement
RES_SEND_FRAME
HEADER CMD DATA CRC ETX
3 bytes 1 byte 1 byte 2 bytes 1 byte
0xFF ; 0x02 ;
0x05
0x21
Status
0x00: Transmission OK
0x01: Transmission error
0x03
• Status frame – 0x37 (END_MESSAGE_EXCHANGE)
END_MESSAGE_EXCHANGE
HEADER CMD DATA CRC ETX
3 bytes 1 byte 1 byte 2 bytes 1 byte
0xFF ; 0x02 ;
0xXX
0x37 0x00 0x03
Reception of this command by the host depends on whether or not status
frames are activated using the parameter EXCHANGE_STATUS (0x0E).
This command is useful for exchanging data using 0x22
(REQ_SEND_MESSAGE), 0x24 (REQ_SEND_BROADCAST_RESPONSE),
and 0x2A (REQ_SEND_BCST_MESSAGE) since it leaves the Wavecard radio
board available for subsequent RS232 serial link exchanges (see diagram on
page 48).
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