Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 56 / 352

Controller Area Network (CAN)
network length is short. If tighter timing requirements or longer network lengths are needed,
then the
ROM_CANBitTimingSet() function is available for full customization of all of the CAN
bit timing values. Since not all bit rates can be matched exactly, the bit rate is set to the value
closest to the desired bit rate without being higher than the
ui32BitRate value.
Returns:
This function returns the bit rate that the CAN controller was configured to use or it returns 0
to indicate that the bit rate was not changed because the requested bit rate was not valid.
6.2.1.2 ROM_CANBitTimingGet
Reads the current settings for the CAN controller bit timing.
Prototype:
void
ROM_CANBitTimingGet(uint32_t ui32Base,
tCANBitClkParms *psClkParms)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_CANTABLE
is an array of pointers located at
ROM_APITABLE[18]
.
ROM_CANBitTimingGet
is a function pointer located at
ROM_CANTABLE[5]
.
Parameters:
ui32Base is the base address of the CAN controller.
psClkParms is a pointer to a structure to hold the timing parameters.
Description:
This function reads the current configuration of the CAN controller bit clock timing,
and stores the resulting information in the structure supplied by the caller.
Refer to
ROM_CANBitTimingSet() for the meaning of the values that are returned in the structure
pointed to by psClkParms .
Returns:
None.
6.2.1.3 ROM_CANBitTimingSet
Configures the CAN controller bit timing.
Prototype:
void
ROM_CANBitTimingSet(uint32_t ui32Base,
tCANBitClkParms *psClkParms)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_CANTABLE
is an array of pointers located at
ROM_APITABLE[18]
.
ROM_CANBitTimingSet
is a function pointer located at
ROM_CANTABLE[4]
.
56 April 8, 2013