Texas Instruments Tiva TM4C123GH6PM User Manual

Interrupt Controller (NVIC)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_INTERRUPTTABLE is an array of pointers located at ROM_APITABLE[14].
ROM_IntPrioritySet is a function pointer located at ROM_INTERRUPTTABLE[6].
Parameters:
ui32Interrupt specifies the interrupt in question.
ui8Priority specifies the priority of the interrupt.
Description:
This function is used to set the priority of an interrupt. When multiple interrupts are asserted
simultaneously, the ones with the highest priority are processed before the lower priority in-
terrupts. Smaller numbers correspond to higher interrupt priorities; priority 0 is the highest
interrupt priority.
The hardware priority mechanism will only look at the upper 3 bits of the priority level, so
any prioritization must be performed in those bits. The remaining bits can be used to sub-
prioritize the interrupt sources, and may be used by the hardware priority mechanism on a
future part. This arrangement allows priorities to migrate to different NVIC implementations
without changing the gross prioritization of the interrupts.
Returns:
None.
144 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.