Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 293 / 352

uDMA Controller
Description:
This function sets the base address of the channel control table. This table resides in system
memory and holds control information for each uDMA channel. The table must be aligned on
a 1024 byte boundary. The base address must be set before any of the channel functions can
be used.
The size of the channel control table depends on the number of uDMA channels, and which
transfer modes are used. Refer to the introductory text and the microcontroller data sheet for
more information about the channel control table.
Returns:
None.
23.2.1.19 ROM_uDMADisable
Disables the uDMA controller for use.
Prototype:
void
ROM_uDMADisable(void)
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_uDMADisable
is a function pointer located at
ROM_UDMATABLE[2]
.
Description:
This function disables the uDMA controller. Once disabled, the uDMA controller will not operate
until re-enabled with
ROM_uDMAEnable() .
Returns:
None.
23.2.1.20 ROM_uDMAEnable
Enables the uDMA controller for use.
Prototype:
void
ROM_uDMAEnable(void)
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_uDMAEnable
is a function pointer located at
ROM_UDMATABLE[1]
.
Description:
This function enables the uDMA controller. The uDMA controller must be enabled before it can
be configured and used.
Returns:
None.
April 8, 2013 293