Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 164 / 352

Pulse Width Modulator (PWM)
Prototype:
void
ROM_PWMGenIntClear(uint32_t ui32Base,
uint32_t ui32Gen,
uint32_t ui32Ints)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_PWMTABLE
is an array of pointers located at
ROM_APITABLE[8]
.
ROM_PWMGenIntClear
is a function pointer located at
ROM_PWMTABLE[17]
.
Parameters:
ui32Base is the base address of the PWM module.
ui32Gen
is the PWM generator to query. Must be one of
PWM_GEN_0
,
PWM_GEN_1
,
PWM_GEN_2
, or
PWM_GEN_3
.
ui32Ints specifies the interrupts to be cleared.
Description:
Clears the specified interrupt(s) by writing a 1 to the specified bits of the interrupt sta-
tus register for the specified PWM generator. The
ui32Ints parameter is the logical OR of
PWM_INT_CNT_ZERO , PWM_INT_CNT_LOAD , PWM_INT_CNT_AU , PWM_INT_CNT_AD ,
PWM_INT_CNT_BU , or PWM_INT_CNT_BD .
Note:
Because there is a write buffer in the Cortex-M4 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.
15.2.1.14 ROM_PWMGenIntStatus
Gets interrupt status for the specified PWM generator block.
Prototype:
uint32_t
ROM_PWMGenIntStatus(uint32_t ui32Base,
uint32_t ui32Gen,
bool bMasked)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_PWMTABLE
is an array of pointers located at
ROM_APITABLE[8]
.
ROM_PWMGenIntStatus
is a function pointer located at
ROM_PWMTABLE[16]
.
Parameters:
ui32Base is the base address of the PWM module.
ui32Gen is the PWM generator to query. Must be one of PWM_GEN_0 , PWM_GEN_1 ,
PWM_GEN_2 , or PWM_GEN_3 .
164 April 8, 2013