Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 274 / 352

uDMA Controller
void ROM_uDMADisable (void)
void ROM_uDMAEnable (void)
void ROM_uDMAErrorStatusClear (void)
uint32_t ROM_uDMAErrorStatusGet (void)
void ROM_uDMAIntClear (uint32_t ui32ChanMask)
uint32_t ROM_uDMAIntStatus (void)
23.2.1 Function Documentation
23.2.1.1 ROM_uDMAChannelAssign
Assigns a peripheral mapping for a uDMA channel.
Prototype:
void
ROM_uDMAChannelAssign(uint32_t ui32Mapping)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_UDMATABLE
is an array of pointers located at
ROM_APITABLE[17]
.
ROM_uDMAChannelAssign
is a function pointer located at
ROM_UDMATABLE[23]
.
Parameters:
ui32Mapping is a macro specifying the peripheral assignment for a channel
Description:
This function assigns a peripheral mapping to a uDMA channel. It is used to select which pe-
ripheral is used for a uDMA channel. The parameter
ui32Mapping should be one of the macros
named
UDMA_CHn_tttt
from the header file udma.h . For example, to assign uDMA channel
0 to the UART2 RX channel, the parameter should be the macro
UDMA_CH0_UART2RX
.
Returns:
None.
23.2.1.2 ROM_uDMAChannelAttributeDisable
Disables attributes of a uDMA channel.
Prototype:
void
ROM_uDMAChannelAttributeDisable(uint32_t ui32ChannelNum,
uint32_t ui32Attr)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_UDMATABLE
is an array of pointers located at
ROM_APITABLE[17]
.
ROM_uDMAChannelAttributeDisable
is a function pointer located at
ROM_UDMATABLE[12]
.
274 April 8, 2013