Controller Area Network (CAN)
Prototype:
void
ROM_CANIntEnable(uint32_t ui32Base,
uint32_t ui32IntFlags)
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_CANIntEnable is a function pointer located at ROM_CANTABLE[10].
Parameters:
ui32Base is the base address of the CAN controller.
ui32IntFlags is the bit mask of the interrupt sources to be enabled.
Description:
Enables specific interrupt sources of the CAN controller. Only enabled sources will cause a
processor interrupt.
The ui32IntFlags parameter is the logical OR of any of the following:
CAN_INT_ERROR - a controller error condition has occurred
CAN_INT_STATUS - a message transfer has completed, or a bus error has been detected
CAN_INT_MASTER - allow CAN controller to generate interrupts
In order to generate any interrupts, CAN_INT_MASTER must be enabled. Further, for any
particular transaction from a message object to generate an interrupt, that message object
must have interrupts enabled (see ROM_CANMessageSet()). CAN_INT_ERROR will generate
an interrupt if the controller enters the “bus off” condition, or if the error counters reach a limit.
CAN_INT_STATUS will generate an interrupt under quite a few status conditions and may
provide more interrupts than the application needs to handle. When an interrupt occurs, use
ROM_CANIntStatus() to determine the cause.
Returns:
None.
6.2.1.11 ROM_CANIntStatus
Returns the current CAN controller interrupt status.
Prototype:
uint32_t
ROM_CANIntStatus(uint32_t ui32Base,
tCANIntStsReg eIntStsReg)
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_CANIntStatus is a function pointer located at ROM_CANTABLE[12].
Parameters:
ui32Base is the base address of the CAN controller.
eIntStsReg indicates which interrupt status register to read
April 8, 2013 61
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