User's Manual
Table Of Contents
- 1. INTRODUCTION
- 2. RS232 SERIAL PROTOCOL PRESENTATION
- 3. setting the internal parameters of the wavecard
- 3.1- Configuration of the functional parameters
- 3.2- Configuration of the control parameters
- 3.2.1 - selection of the radio operating channel when FHSS is deselected
- 3.2.2 - Selection of the RF medium physical mode
- 3.2.3 - Selection of the radio board emission power
- 3.2.4 - Activation of the Wavenis RF Asic RSSI threshold autocorrection
- 3.2.5 - Selection of the serial baudrate.
- 3.2.6 - Reading the firmware version of the WaveCard
- 3.2.7 - Reading the RSSI level (Received Signal Strengh Indicator)
- 3.2.8 - TEST Mode
- 4. SERVICE COMMANDS
- 5. COMMUNICATION MODES
- 5.1- 'Frame Exchange’ Mode
- 5.2- 'Message’ Mode
- 5.3- ’Polling’ Mode
- 5.4- ’Broadcast’ mode
- 5.4.1 - Configuration of the parameters relating to the 'Broadcast' mode
- 5.4.2 - 'BroadCast' mode without waiting for a response
- 5.4.3 - 'BroadCast' mode with waiting for responses
- 5.4.4 - Format of the commands – from the request transmitter side
- 5.4.5 - Format of the commands – from the request receiver side
- 5.4.6 - Use of the selective, or not-selective broadcast mode
- 5.5- ’Multi frames' Mode
Document : WCAMODHEL.sxw
0x02
WAKEUP_LENGTH : duration of the Wake up
when long wake up is set up.
This value must be higher than the polling period of
RF medium radio.
Value in multiples of 1ms, defined LSB first
Default value : 1100 ms
min value = 20 ms (0x1400)
max value = 10 sec. (0x1027)
2
The receiver of the exchange, when it detect WakeUp preamble on the radio medium, carries out the
following operations:
It starts a timeout of waiting for the synchronization word (sync), which the duration is slightly
higher than its WakeUp period. This duration cannot be configured.
It begins a validation phase of the WakeUp preamble (detection of WakeUp). This phase
corresponds to the detection of several successive symbols composing the preamble. If the
detection fails, the equipment is repositioned in stand-by mode. The time of detection depends on
the speed transmission used.
The periodic wakeup having to occur when waiting of synchronization, are memorized (in order to
preserve the periodicity), but not carried out.
At the end of the phase of WakeUp, the transmitter equipment send a sequence of synchronization, followed
by data to be transmitted.
➢ Typical case (Long WakeUp = receiver WakeUp period + 100ms)
➢ Case of too short WakeUp (lower than the receiver WakeUp period)
WCAMODHEL Handbook page 18 of 74