mikromedia for Stellaris M3: LM3S9B95, TFT LCD, Accelerometer

Description

mikromedia for Stellaris M3: LM3S9B95, TFT LCD, Accelerometer
MIKROE-974
Develop your multimedia-rich application on the high-performance LM3S9B95 Stellaris ARM Cortex-M3 device with this board. The mikromedia for Stellaris M3 has rich multimedia peripherals: 320×240 TFT display with Touch Screen, and a stereo MP3 codec (VS1053) which is capable of decoding MP3/WMA/AAC/eAAC+/Ogg Vorbis/WAV files from your MMC card. A microSD card slot is also available. A 3-axis serial accelerometer, USB connector and 8-Mbit Serial Flash memory are on the board, too. The board features a front-facing reset button, battery charger circuit for Li-Polymer batteries, crystal oscillator and connection pads for all other available pins. It is compatible with all mikromedia shields (see options below).
A color user manual and code examples are included. The board comes preprogrammed with a fast USB HID Bootloader, so you won't have to spend a penny more on external programmers. If you do want to, pins are available for using an external programmer/debugger.
All unused microcontroller pins are available via pads along the sides of the board. The board measures 81.15 × 60.45 mm (3.195 × 2.38 inches).
Stellaris M3 Multimedia Board Features
LM3S9B95 ARM Cortex-M3 microcontroller
This high-performance 32-bit microcontroller with its integrated modules in combination with the on-board modules is ideal for multimedia applications.
Up to 100 DMIPS Operation
32-bit architecture
256KB of Flash memory
96KB of SRAM memory
65 I/O pins
32kHz RTC circuit
IEEE 1588
Ethernet, UART, SPI, I2C, CAN, ADC, etc.
USB power supply
You can apply power to the board using the Mini-B USB cable provided with the board. On-board voltage regulators will make sure to regulate the appropriate voltage levels to each part of the board. The Power LED will indicate the presence of power supply.
Battery power supply
You can also power the board using a Li-Polymer battery via the on-board battery connector. An MCP73832 battery charger circuit enables you to charge the battery over USB connection. Charging current is ~250mA and charging voltage is 4.2V DC.
Programming with bootloader
For programming the microcontroller, you can use a bootloader program which is pre-installed in the MCU memory. To transfer a .hex file from a PC to the MCU, you can use the free Stellaris M3 USB Bootloader application. The board has a mini-USB connector and ships with a cable to connect to your PC.
Programming with external programmer/debugger
In case you want to remove the USB bootloader, need to re-install it, or want to perform in-circuit debugging, the microcontroller can be programmed with an external in-circuit programmer/debugger such as the
mikroProg-Tiva
(not included). The board has pads for installing programming headers.
Reset Button
The board has a reset button on the LCD side, so it can be pressed by the end user in an encased device. There also are pads on the back side of the board where you can install a second reset button if desired. A reset signal also can be provided through the extension header.
Crystal Oscillator
The board is equipped with an 8MHz crystal oscillator circuit that provides stable clock signal to the microcontroller OSC pins. This base frequency is suitable for further clock multipliers and ideal for generation of the necessary USB clock, which ensures proper operation of the bootloader and your custom USB-based applications.
microSD Card Slot
The board contains a microSD card slot for using microSD cards in your projects. It enables you to store large amounts of data externally, thus saving microcontroller memory. microSD cards use Serial Peripheral Interface (SPI) for communication with the microcontroller.
Touch Screen
The development system features a TFT 320×240 display covered with a resistive touch panel. Together they form a functional unit called a touch screen. It enables data to be entered and displayed at the same time. The TFT display is capable of showing data in 262,144 different colors.
Audio Module
mikromedia for Stellaris M3 features a VS1053 audio controller. This module enables audio reproduction by using stereo headphones connected to the system via the 3.5mm connector CN2. All functions of this module are controlled by the microcontroller over Serial Peripheral Interface (SPI).
USB Connection
The LM3S9B95 microcontroller has an integrated USB module, which enables you to implement USB communication functionality of your mikromedia board. Connection with a target USB host is done over Mini-B USB connector which is positioned next to the battery connector.
Accelerometer
The on-board ADXL345 accelerometer, among other features, can be used to measure acceleration in three axes: x, y, and z. The accelerometer's function is defined by the program loaded into the microcontroller. Communication between the accelerometer and the microcontroller is performed via the I2C interface. You can set the accelerometer address to 0 or 1 by re-soldering the SMD jumper (zero-ohm resistor) to the appropriate position. This jumper is placed in address 1 position by default.
Flash Memory
The M25P80 Flash memory module enables the microcontroller to use an additional 8Mbits of Flash memory. It is connected to the microcontroller via the Serial Peripheral Interface (SPI).
Software Examples
The ZIP file you can download below contains the following example software, both as ready-to-load compiled code and as source code written in
mikroC
,
mikroBASIC
and
mikroPascal
. The source codes provide detailed explanatory comments.
Demonstration of ADXL345 three-axis accelerometer. Values from accelerometer are shown on the TFT display.
Simple calculator demo for touchscreen.
Simple demonstration of display elements created in
Visual TFT
.
Map application demo. Displays a world map. Touching continents opens up an information display.
Demonstration of MMC/SD functions for reading/writing files and observing results through USART terminal.
Demonstration of communicating with VS1053B codec. Reads MP3 file from MMC and sends it to VS1053B for decoding and playback.
Simple progress bar demo.
Demonstration of SerialFlash usage (chip erase, read Flash ID, read/write a byte, read/write an array).
Demonstration of game graphic interfaces. Use a touch-joypad to move a ball through a maze with obstacles.
Demonstration of displaying a JPG image on the TFT display.