AvaLAN Wireless AW900mSPI-10 - Manual (Page 19)

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AW900mSPI User’s Manual
part and ranges from 0 to 100. BER7..0 is the 2-digit fractional part and ranges from
0 to 99. The block error rate is calculated over the last 1000 data blocks.
Version Command
The getVersion command is used to determine the firmware version running in the
XC1220.
getVersion SPI Mode: 0x06 UART Mode: 0x05
b7 b6 b5 b4 b3 b2 b1 b0
Byte 1 RFV3 RFV2 RFV1 RFV0 PV3 PV2 PV1 PV0
Byte 2 RV7 RV6 RV5 RV4 RV3 RV2 RV1 RV0
Byte 3 RV15 RV14 RV13 RV12 RV11 RV10 RV9 RV8
PV0 to PV3 is the 4-bit product version number.
RFV0 to RFV3 is the 4-bit radio version number.
RV0 to RV15 is the 16-bit firmware release version number.
Connected SUs Command
The getNumberofConnectedSUs command is used on the AP only, if issued on the
SU it will return all zeros. It returns the current number of SUs that are connected
to the RF network (5-bit number, CC0 to CC4).
getNumberofConnectedSUs SPI Mode: 0x08 UART Mode: 0x07
b7 b6 b5 b4 b3 b2 b1 b0
Byte 1 x x x CC4 CC3 CC2 CC1 CC0
RSSI Command
The getRSSIReadings command is used to determine if possible interference ex-
ists in the RF environment. The AW900mSPI can perform a spectrum analysis scan,
stepping through the frequency band and measuring the peak and average power
received at each frequency. Note: When two or more radios are actively linked, the
AP will tell the SUs to cease transmitting when it goes into spectrum scan mode.
However, when an SU scans, it will likely see a peak transmission from another
radio.
The host microcontroller sends the resolution settings to the XC1220, then gets