ARM®Cortex®-M4 Timer and USB Programming

This chapter provides general information about the ARM ® Cortex ® -M4 Microcontroller General-Purpose Timer programming, including the Watchdog Times programming. It also includes the GPIO Ports related to General-Purpose Timers and USB modules used in TM4C123GH6PM MCU system. The chapter concentrates on the architectures and programming interfaces applied on General-Purpose Timers, Watchdog Timers as well as Universal Serial Bus (USB) modules specially designed for the TM4C123GH6PM MCU system. It also discusses special or alternative control functions for different GPIO pins related to different peripherals, including timers and USB modules with example projects. Each GPIO Port can be mapped to an I/O block, and each block contains 8 bits or 8 pins. Each bit or each pin can be configured as either input or output pin. Most of peripherals, including system, on-chip and interfaces to the external peripherals, are connected and controlled to the GPIO Ports with related GPIO pins.