Texas Instruments Tiva TM4C123GH6PM, User Manual

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System Exception Module
SYSEXCP_INT_FP_UFC - Floating-point underflow exception interrupt
SYSEXCP_INT_FP_IOC - Floating-point invalid operation interrupt
SYSEXCP_INT_FP_DZC - Floating-point divide by zero exception interrupt
SYSEXCP_INT_FP_IDC - Floating-point input denormal exception interrupt
Note:
Because there is a write buffer in the Cortex-M processor, it may take several clock cycles
before the interrupt source is actually cleared. Therefore, it is recommended that the interrupt
source be cleared early in the interrupt handler (as opposed to the very last action) to avoid
returning from the interrupt handler before the interrupt source is actually cleared. Failure to
do so may result in the interrupt handler being immediately reentered (because the interrupt
controller still sees the interrupt source asserted).
Returns:
None.
19.2.1.2 ROM_SysExcIntDisable
Disables individual system exception interrupt sources.
Prototype:
void
ROM_SysExcIntDisable(uint32_t ui32IntFlags)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SYSEXCTABLE
is an array of pointers located at
ROM_APITABLE[30]
.
ROM_SysExcIntDisable
is a function pointer located at
ROM_SYSEXCTABLE[2]
.
Parameters:
ui32IntFlags is the bit mask of the interrupt sources to be disabled.
Description:
This function disables the indicated system exception interrupt sources. Only sources that are
enabled can be reflected to the processor interrupt; disabled sources have no effect on the
processor.
The ui32IntFlags parameter is the logical OR of any of the following:
SYSEXCP_INT_FP_IXC - Floating-point inexact exception interrupt
SYSEXCP_INT_FP_OFC - Floating-point overflow exception interrupt
SYSEXCP_INT_FP_UFC - Floating-point underflow exception interrupt
SYSEXCP_INT_FP_IOC - Floating-point invalid operation interrupt
SYSEXCP_INT_FP_DZC - Floating-point divide by zero exception interrupt
SYSEXCP_INT_FP_IDC - Floating-point input denormal exception interrupt
Returns:
None.
224 April 8, 2013