Data Acceptance Filter - Analog Devices ADSP-BF506F Hardware Reference Manual

CAN Operation
results in the receive message lost interrupt being raised in the global CAN
interrupt status register (
boxes are checked for another matching identifier. If no match is found,
the message is discarded and the next message is checked.

If a receive mailbox is disabled, an ongoing receive message for that
mailbox is lost even if a second mailbox is configured to receive the
same identifier.

Data Acceptance Filter

If DeviceNet mode is enabled (
set up for filtering on data field, the filtering is done on the standard ID of
the message and data fields. The data field filtering can be programmed
for either the first byte only or the first two bytes, as shown in
Table 17-2. Data Field Filtering
FDF
Filter On Data Field
0
0
1
1
If the bit is set in the corresponding
FDF
register holds the data field mask (
the corresponding
extended identifier mask (
17-18
= in
RMLIS 1
=
DNM
FMD
Full Mask Data Field
0
1
0
1
DFM[15:0]
register, the
CAN_AMxxH
EXTID_HI[15:0]
ADSP-BF50x Blackfin Processor Hardware Reference
). If
CAN_GIS OPSSn
in ) and the mailbox is
1 CAN_CONTROL
Description
Do not allow filtering on the data
field
Not allowed. FMD must be 0 if FDF
is 0.
Filter on first data byte only
Filter on first two data bytes
register, the
CAN_AMxxH
). If the
FDF
register holds the
CAN_AMxxL
).
= , the next mail-
1
Table 17-2.
CAN_AMxxL
bit is cleared in