Texas Instruments Tiva TM4C123GH6PM User Manual

Floating-Point Unit (FPU)
9.2 API Functions
Functions
void ROM_FPUDisable (void)
void ROM_FPUEnable (void)
void ROM_FPUFlushToZeroModeSet (uint32_t ui32Mode)
void ROM_FPUHalfPrecisionModeSet (uint32_t ui32Mode)
void ROM_FPULazyStackingEnable (void)
void ROM_FPUNaNModeSet (uint32_t ui32Mode)
void ROM_FPURoundingModeSet (uint32_t ui32Mode)
void ROM_FPUStackingDisable (void)
void ROM_FPUStackingEnable (void)
9.2.1 Function Documentation
9.2.1.1 ROM_FPUDisable
Disables the floating-point unit.
Prototype:
void
ROM_FPUDisable(void)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_FPUTABLE is an array of pointers located at ROM_APITABLE[26].
ROM_FPUDisable is a function pointer located at ROM_FPUTABLE[1].
Description:
This function disables the floating-point unit, preventing floating-point instructions from execut-
ing (generating a NOCP usage fault instead).
Returns:
None.
9.2.1.2 ROM_FPUEnable
Enables the floating-point unit.
Prototype:
void
ROM_FPUEnable(void)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_FPUTABLE is an array of pointers located at ROM_APITABLE[26].
ROM_FPUEnable is a function pointer located at ROM_FPUTABLE[0].
82 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.