Texas Instruments Tiva TM4C123GH6PM User Manual

Interrupt Controller (NVIC)
Description:
The specified interrupt is enabled in the interrupt controller. Other enables for the interrupt
(such as at the peripheral level) are unaffected by this function.
Returns:
None.
13.2.1.3 ROM_IntIsEnabled
Returns if a peripheral interrupt is enabled.
Prototype:
uint32_t
ROM_IntIsEnabled(uint32_t ui32Interrupt)
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_IntIsEnabled is a function pointer located at ROM_INTERRUPTTABLE[12].
Parameters:
ui32Interrupt specifies the interrupt to check.
Description:
This function checks if the specified interrupt is enabled in the interrupt controller.
Returns:
A non-zero value if the interrupt is enabled.
13.2.1.4 ROM_IntMasterDisable
Disables the processor interrupt.
Prototype:
bool
ROM_IntMasterDisable(void)
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_IntMasterDisable is a function pointer located at ROM_INTERRUPTTABLE[2].
Description:
Prevents the processor from receiving interrupts. This does not affect the set of interrupts
enabled in the interrupt controller; it just gates the single interrupt from the controller to the
processor.
Returns:
Returns true if interrupts were already disabled when the function was called or false if they
were initially enabled.
April 8, 2013 139

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.