Lantronix DSTni-EX - Manual (Page 90)

82
Error Capture Register
The Error Capture register captures the most recent error event with the frame reference
pointer, rx- and tx-mode and the associated error code.
Table 5-62. Error Capture Register
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OFFSET 78h
FIELD
ERR2 ERR1 ERR0 FR4 FR3 FR2 FR1 FR0 TX_MOD RX_MOD FRB5 FRB4 FRB3 FRB2 FRB1 FRB0
RESET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Table 5-63. Error Capture Register Definitions
Bits Field Name Description
15:13 Err[2:0] Error_code
000 = no error (default)
001 = crc_err
010 = form_err
011 = ack_err
100 = stuff_err
101 = bit_err
12:8 FR[4:0] frame_ref_Field
This is the frame reference a incoming or outgoing CAN message.
Values are:
00000 = stopped
00001 = synchronize
00101 = interframe
00110 = bus_idle
00111 = start_of_frame
01000 = arbitration
01001 = control
01010= data
01011 = crc
01100 = ack
01101 = end_of_frame
10000 = error_flag
10001 = error_echo
10010 = error_del:
11000 = overload_flag
11001 = overload_echo
11010 = overload_del
Other codes are not used.
7 TX_MOD TX Mode
1 = transmitting data.
0 = not in TX mode (receiving or idle).
6 RX_MOD RX Mode
1 = receiving data.
0 = not in RX mode (transmitting or idle).
5:0 FRB[5:0] frame_ref_bit_nr
A 6-bit vector that counts the bit numbers in one field.
Example: if field = “data” = “01010”, “bit_nr” = “000000”, and
“tx_mode” = ‘1’, it indicates that the first data bit is being
transmitted.