Head-End Audio Player Using Flash Card

Overview

An LPC2138 microcontroller is used by this project to implement a simple digital audio player where the music files stored on a removable flash memory are played.

Details

The main component of the device is the LPC2138 microcontroller which is a 16/32-bit ARM&TDMI-S MCU with embedded trace support and real-time emulation. It goes along with 64/512 kb of embedded high speed flash memory which signifies a 128-bit wide internal memory interface and allows 31-bit code execution at maximum clock rate by a unique accelerator. Since the LPC 2138 has low power consumption and small size, they are widely used and ideal for application where miniaturization is the main key. They are also suitable for voice recognition, protocol converters, communication gateways, and others, since it has a wide range of serial communication interfaces and on-chip SRAM option of 16/31 kilobytes.

The ever-present multimedia cards (MMC) is used by the project where lossless audio tracks are transported and played back from the head-end unit inside a car. The CD changer is emulated by the flash card player where the tracks are organized into subdirectories, making each directory in the head-end unit appear as a CD.