Internet Radio (iRadio) Application Profile

Internet Radio (iRadio) is an R n D case from our partners, he used a low-end MCU to handle audio decoding, using W5100 to deal with network and network audio streaming data acceptance. The main chip is a ATMEL AVR32, the server uses the open DLNA server program. At last, the network audio are streaming playback.

The schematic and main configurations are as follows.

Main hardware configurations:

Hardware Specifications:

- AVR32 for MP3 and WMA decoding
- W5100 10/100Mbps Ethernet Controller with Network Protocols
- 1MByte SDRAM for audio buffering
- 2.4” color TFT (320x240)
- DC 5V input for core, DC12 input for Audio Amplifier

BOM List:
- W5100 + RJ45
- AVR32 or similar
- SDRAM 1MByte
- 2.4” TFT (2.2”)
- Power and Misc
- Audio Amplifier (about 20W)

Features:
- Local playback on SD Card (pending, waiting for Atmel)
- Internet Radio with MP3 (working now) and WMA format (debugging)
- Download Station lists from Portal in XML format
- DLNA Renderer to play audio streamed from DLNA server

Server format:

• HTTP: working now
• MMS: implementing
• RTSP: planned

Applications:
- Internet Radio, with DLNA Renderer
- Embedded with other AV system, (no need to count TFT), such as Boom box, Photo frame,

DVB, DVD…even we could share the SoC in the system, for example, in DVD; we just need to add W5100 + RJ45 to have same functions.

Translated from Johnny Yan on 20/09/2009
Direct link (Chinese version): http://blog.sina.com.cn/s/blog_61b952280100f4ox.html