Texas Instruments Tiva TM4C123GH6PM User Manual

uDMA Controller
23.2.1.14 ROM_uDMAChannelSizeGet
Gets the current transfer size for a uDMA channel control structure.
Prototype:
uint32_t
ROM_uDMAChannelSizeGet(uint32_t ui32ChannelStructIndex)
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_uDMAChannelSizeGet is a function pointer located at ROM_UDMATABLE[15].
Parameters:
ui32ChannelStructIndex is the logical OR of the uDMA channel number with either
UDMA_PRI_SELECT or UDMA_ALT_SELECT.
Description:
This function is used to get the uDMA transfer size for a channel. The transfer size is the
number of items to transfer, where the size of an item might be 8, 16, or 32 bits. If a partial
transfer has already occurred, then the number of remaining items is returned. If the transfer
is complete, then 0 is returned.
Returns:
Returns the number of items remaining to transfer.
23.2.1.15 ROM_uDMAChannelTransferSet
Sets the transfer parameters for a uDMA channel control structure.
Prototype:
void
ROM_uDMAChannelTransferSet(uint32_t ui32ChannelStructIndex,
uint32_t ui32Mode,
void
*
pvSrcAddr,
void
*
pvDstAddr,
uint32_t ui32TransferSize)
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_uDMAChannelTransferSet is a function pointer located at ROM_UDMATABLE[0].
Parameters:
ui32ChannelStructIndex is the logical OR of the uDMA channel number with either
UDMA_PRI_SELECT or UDMA_ALT_SELECT.
ui32Mode is the type of uDMA transfer.
pvSrcAddr is the source address for the transfer.
pvDstAddr is the destination address for the transfer.
ui32TransferSize is the number of data items to transfer.
290 April 8, 2013

Texas Instruments Tiva TM4C123GH6PM Specifications

General

Core	ARM Cortex-M4F
Clock Speed	80 MHz
Flash Memory	256 KB
SRAM	32 KB
GPIO Pins	43
UART	8
I2C	2
SPI/SSI	4
USB	USB 2.0
Timers	6
Communication Interfaces	UART, I2C, SPI, USB
Operating Temperature	-40°C to 85°C
Package	LQFP64

Summary

Boot Loader

Introduction

Explains the ROM-based boot loader and its interfaces for flash updates.

Serial Interfaces

Details the UART, SSI, and I2C interfaces used by the boot loader.

USB Interface

Describes the USB boot loader functionality using the DFU protocol.

Controller Area Network (CAN)

Flash

GPIO

Hibernation Module

Inter-Integrated Circuit (I2C)

Interrupt Controller (NVIC)

Memory Protection Unit (MPU)

Pulse Width Modulator (PWM)

Synchronous Serial Interface (SSI)

System Control

Timer

UART

uDMA Controller

USB Controller

Using USB with the uDMA Controller

Watchdog Timer

Introduction

Functions

Lists and describes API functions for watchdog timer configuration, interrupts, and lock mechanism.