Xmega A1 Media Player development board

Features of this development board:

1. Main controller ATxmega64A1/ATxmega128A1/ATxmega64A1u/ATxmega128A1u.
2. On-board External 512KB SRAM memory ( AS6C4008 ).
3. One or two onboard 24c EEPROM ICS up to 2Mb, or 23K serial RAM memory, or combined.
4. One or two onboard uSD memory card sockets, with led to indicate activity of each uSD memory card.
5. On-board usart to USB converter ( FT232RQ), with RX/TX activity led.
6. On-board dedicated battery charger controller via USB connector ( MCP73871 ).
7. On-board dedicated resistive touch screen controller ( AR1020 ).
8. On-board dedicated RTC/64Bytes SRAM/128Bytes EEPROM circuit with backup high capacity capacitor ( MCP79410 ).
9. On-board Ogg Vorbis/MP3/AAC/WMA/MIDI codec ( VS1053b ) with jack 3.5mm audio output ,3 pin connector audio input and connector for button style Microphone, with led activity monitor on xDCS, xCS and and DREQ pins.
10. 320x240 TFT high quality display 8Bit bus mode ( MI0283QT-2 ) connected to external SRAM bus to increase speed of transaction using DMA working with him like a external SRAM.
11. One 30 pin extension peripheral connector with bidirectional 8bit data bus, unidirectional 8Bit A0-A7 address bus,7 chip select signals, RW and RD signals and one IRQ line.
12. On-board bus extension decoder to allow up to seven external peripherals directly accessed via external RAM bus ( 74LV138 ) and up to 256*7 external peripherals with external addresses decoders.
13. One lateral push button user defined(like PWR/Back).
14. One lateral push button reset function.
15. PDI programing connector.
16. JTAG debugging connector.
17. 3V VLDO power regulator for all circuits, to power this board from LI-IO battery on entire range of voltage ( 3.2 to 4.2V and 5V from USB connector).
18. 1.8V VLDO power regulator to power digital section on VS1053b circuit.
19. On-board NOKIA or HUAVEI battery connector.
20. Three pin connector to connect an external battery.
21. 29 IO pins accessed via two lateral 26 pin connectors ( entire B and C port, pin port A2-A7 and D1-D7 ).
22. Resistive divider to monitor the battery voltage.

 Down I posted several photos of board generated by a 3D software:

 In future for this board will be developed extra peripherals like:

• ATA high capacity hard disk shield.
• Secondary displays shield.
• Ethernet interface shield.
• Nand flash memory shield.
• Video sensor shield.
• Magnetometer shield.
• Gyroscope shield.
• Dedicated ADC shield to make oscilloscope.
• Video out encoder shield.
• Wireless communication shield.
• GSM communication shield.
• IR communication shield.
• Bluetooth communication shield.
• GPS shield.
• Motor stepper shield.
• Xbee shield.

And others.

This board will be delivered with a demo MP3 player project source code and a framework with library's and drivers special developed for this board.

Mp3 player with ATmega64, Vs1011 & Samsung E700 display

This MP3 player is an upgrade to this player . New in this player is a new nice interface with bitmaps from media player windows 7 and windows 7 battery icons.





I preferred to use bitmaps for interface because in future i want to be possible to change the skin interface from SD card, in this case is more simple to create skins for this player.

V1.0.1A

A little correction for used times for back light, keyboard and battery showing.

Download MP3 PlayerV1.0.1A

V1.0.1

This version player is made to use ASM_SDK V1.0.4 and prepared to work with multiple opened files.

Download MP3_PlayerV1.0.1

From here you can download ASM_SDK.
With ASM_SDK 1.0.5 or newest version you can play from SDHC high capacity > 4GB, at the frequency of only 6 MHz you can play 320Kb/s bit rate melody's.

V1.0.0From here you can download the first source code for this player.To compile this player is necessarily to download and include ASM SDK from here, this version is made to use ASM_SDK V1.0.3.

Multifunctional 20 Band Audio Spectrum Analyzer V3.0.x

This project is a version 3 firmware and hardware upgrade spectrum analyzer with 20 audio band of 20 levels each and includes other functions and utilities improvements.

From Digital electronics and programing

From Digital electronics and programing

On future:

1. Option to put five, ten or more of this boards, each board filtering one frequency, rotated by ninety degrees to obtain large size of panel for disco or other purposes.
2. Ability to display a text message received on the serial unit.
3. Ability to display time during sleep.
4. Function to adjust the signal level manually.
5. Ability to wake up from standby function if signal input is detected.
6. Ability to enter standby mode in the absence of input signal.
7. Ability to export using the serial unit, the levels displayed on the local display.

And many many other functions...........

V3.2
On this update has been added AGC function(Automatic Gain Control), this function allow the spectrum analyzer to work with signals between 80 and 1000mV without external signal conditioner or external signal regulator.
This function can not be turned off from menu settings.

With this update you can download an update for PC client of the up-loader for  this spectrum analyzer, please go here to download this software.


V3.1
Is renamed because is one big step from filters combined (digital & analog) to completely digital filtering.
Added functions:

1. Ability to enter in standby from menu.
2. Change from help of analog circuits to filter audio bands to completely digital filtering bands, without the help of analog filtering circuits ( this improve the stability of the displayed bands ) .

V3.0.3

Added functions:

1. Improve speed of way to display levels of frequencies 0,1 & 2.
2. Ability to set the start-up light when is connected to power supply.
3. Ability to set-up the horizontal way to display the levels of frequencies, normal or mirrored for stereo use, the way is memorized for start-up config.

V3.0.2

Functions:

1. Eleven different ways of displaying the levels of frequencies.
2. Five modes(ways) of display luminance.
3. Ability to set the star-up mode when is connected the power supply.

V3.0.0 & V3.0.1 generic versions( discarded ).

4x25W amplifier with internal usb control

This is a 4x22W amplifier 4Ohm which is young for a PCI Desktop slot and can be diagnosed and controlled by an internal USB connector.
This project is still in development stage
This card is made with a specialized circuit in Class D with I2C control interface produced by TexasInstruments TAS5414 QFP64 and a ATmega8 controller