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AT86RF231
7.2.3.3
Configuration of non IEEE 802.15.4 Compliant Scenarios
Sniffer
Table 7-9 on page 58 shows an RX_AACK configuration to setup a sniffer device. Other
RX_AACK configuration bits, refer to Table 7-5 on page 54 , 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 “Frame Check Sequence (FCS)” on page 85 ). 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 “Frame Control
Field (FCF)” on page 80 , can also be handled. This might be required when implementing propri-
etary, 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 com-
pletely bypass the address filter.
Table 7-10 on page 58 shows the required configuration for a node to receive reserved frames,
Figure 7-9 on page 53 shows the corresponding flow chart.
Table 7-10.
RX_AACK Configuration to Receive 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
1 : enable
0x2C
0
SLOTTED_OPERATION
0 : if transceiver works in unslotted mode
1 : if transceiver works in slotted mode
58
8111C–MCU Wireless–09/09
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