Texas Instruments TM4C1294NCPDT User Manual

Register 1: CAN Control (CANCTL), offset 0x000
This control register initializes the module and enables test mode and interrupts.
The bus-off recovery sequence (see CAN Specification Rev. 2.0) cannot be shortened by setting
or clearing INIT. If the device goes bus-off, it sets INIT, stopping all bus activities. Once INIT
has been cleared by the CPU, the device then waits for 129 occurrences of Bus Idle (129 * 11
consecutive High bits) before resuming normal operations. At the end of the bus-off recovery
sequence, the Error Management Counters are reset.
During the waiting time after INIT is cleared, each time a sequence of 11 High bits has been
monitored, a BITERROR0 code is written to the CANSTS register (the LEC field = 0x5), enabling
the CPU to readily check whether the CAN bus is stuck Low or continuously disturbed, and to monitor
the proceeding of the bus-off recovery sequence.
CAN Control (CANCTL)
CAN0 base: 0x4004.0000
CAN1 base: 0x4004.1000
Offset 0x000
Type RW, reset 0x0000.0001
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
INITIESIEEIEreservedDARCCETESTreserved
RWRWRWRWRORWRWRWROROROROROROROROType
1000000000000000Reset
DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0000.00ROreserved31:8
Test Mode Enable
DescriptionValue
The CAN controller is operating normally.0
The CAN controller is in test mode.1
0RWTEST7
Configuration Change Enable
DescriptionValue
Write accesses to the CANBIT register are not allowed.0
Write accesses to the CANBIT register are allowed if the
INIT bit is 1.
1
0RWCCE6
Disable Automatic-Retransmission
DescriptionValue
Auto-retransmission of disturbed messages is enabled.0
Auto-retransmission is disabled.1
0RWDAR5
June 18, 20141378
Texas Instruments-Production Data
Controller Area Network (CAN) Module

Texas Instruments TM4C1294NCPDT Specifications

General

Brand	Texas Instruments
Model	TM4C1294NCPDT
Category	Microcontrollers
Language	English