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AT86RF232
7.2.3.3 Configuration of non IEEE 802.15.4 Compliant Scenarios
Sniffer
Table 7-9 shows an Atmel AT86RF232 RX_AACK configuration to setup a sniffer
device. Other RX_AACK configuration bits, refer to Table 7-5 , should be set to their
reset values.
All frames received are indicated by an IRQ_2 (RX_START) and IRQ_3 (TRX_END).
After frame reception register bit RX_CRC_VALID (register 0x06, PHY_RSSI) is
updated with the result of the FCS check (see Section 8.2 ). The RX_CRC_VALID bit
needs to be checked in order to dismiss corrupted frames.
Table 7-9. Configuration of a Sniffer Device.
Register
Address
0x17
0x2E
Register
Bits
1
4
Register Name
AACK_PROM_MODE
AACK_DIS_ACK
Description
1 : Enable promiscuous mode.
1 : Disable generation of acknowledgment.
This operating mode is similar to the promiscuous mode.
Reception of Reserved Frames
In RX_AACK mode, frames with reserved frame types, refer to Section 8.1.2.2 , can also
be handled. This might be required when implementing proprietary, non-standard
compliant, protocols. It is an extension of the address filtering in RX_AACK mode.
Received frames are either handled similar to data frames, or may be allowed to
completely bypass the address filter.
Table 7-10 shows the required configuration for a node to receive reserved frames,
Figure 7-11 shows the corresponding flow chart.
Table 7-10. RX_AACK Configuration to Receiv e Reserved Frame Types.
Register
Address
0x20,0x21
0x22,0x23
0x24
…
0x2B
0x0C
Register
Bits
7
Register Name
SHORT_ADDR_0/1
PAN_ADDR_0/1
IEEE_ADDR_0
…
IEEE_ADDR_7
RX_SAFE_MODE
Description
Set node addresses.
0 : Disable frame protection.
1 : Enable frame protection.
0x17
0x17
4
5
AACK_UPLD_RES_FT
AACK_FLTR_RES_FT
1 : Enable reserved frame type reception.
Filter reserved frame types like data frame
type, see note below.
0 : Disable reserved frame types filtering.
1 : Enable reserved frame types filtering.
0x2C
0
SLOTTED_OPERATION
0 : Slotted acknowledgment transmissions
are not to be used.
1 : Slotted acknowledgment transmissions
are to be used.
53
8321A – MCU Wireless – 10/11
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