GPIO
Returns:
None.
10.2.1.5 ROM_GPIODMATriggerDisable
Disables a GPIO pin as a trigger to start a DMA transaction.
Prototype:
void
ROM_GPIODMATriggerDisable(uint32_t ui32Port,
uint8_t ui8Pins)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_GPIOTABLE is an array of pointers located at ROM_APITABLE[4].
ROM_GPIODMATriggerDisable is a function pointer located at ROM_GPIOTABLE[32].
Parameters:
ui32Port is the base address of the GPIO port.
ui8Pins is the bit-packed representation of the pin(s).
Description:
This function disables a GPIO pin to be used as a trigger to start a uDMA transaction. This
function can be used to disable this feature if it was enabled via a call to GPIODMATriggerEn-
able().
Returns:
None.
10.2.1.6 ROM_GPIODMATriggerEnable
Enables a GPIO pin as a trigger to start a DMA transaction.
Prototype:
void
ROM_GPIODMATriggerEnable(uint32_t ui32Port,
uint8_t ui8Pins)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_GPIOTABLE is an array of pointers located at ROM_APITABLE[4].
ROM_GPIODMATriggerEnable is a function pointer located at ROM_GPIOTABLE[31].
Parameters:
ui32Port is the base address of the GPIO port.
ui8Pins is the bit-packed representation of the pin(s).
Description:
This function enables a GPIO pin to be used as a trigger to start a uDMA transaction. Any
GPIO pin can be configured to be an external trigger for the uDMA. The GPIO pin will still
generate interrupts if the interrupt is enabled for the selected pin.
April 8, 2013 91
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