Obvious business potential in a $200 IP-PBX with multiple ports.
This information is sufficient for you to clone the hardware.ġ2 Motivation Various motivations across the people and companies involved in the project. Schematics, PCB layouts, HDL code, unit tests You can download the hardware design information from my web site. Full design and manufacture information available for download.
Several individuals and companies (e.g Digium) working on Blackfin Telephony products Expect to see many Blackfin based Telephony products in the near future This presentation focuses on the activities of the Free Telephony Projectīuild a completely open embedded telephony platform. Fortunately there is some support from the tool chain – for example you can tell the linker to place your DSP code in fast internal memory, while using external memory for less demanding code and data. This is a limited resource and needs to be managed to get maximum performance out of the chip. Between these two clock domains is a cache and some internal memory that can operate at full speed. Lower cost Smaller size Lower power Enhanced reliability Don’t need “hardware” DSP – Blackfin CPU is a DSPĩ Challenges Complex development environment Learning CurveĬross compiler & tool-chain Customized kernel and apps Learning Curve Low memory ~64MB uClinux (offset by partial MMU) Care and feeding of the cache No virtual memory, no paging Cache: External RAM operates at around 100MHz, internally around 500 MHz. Low power < 10W (battery, solar)! No moving parts (fans or disks) Quiet Reliability (parts count, connectors) Low cost (a few hundred $ street) Just plain cool!ĥ Blackfin Processor A powerful DSP (1 GMAC) AND runs uClinuxīreaks the two processor (host/DSP) paradigm Low cost ($5 - $15 each) Well supported by vendor and community Open hardware and softwareĦ IP-PBX Hardware 101 Host PC PCI Card Asterisk Device Driver PCI BridgeįXO Port x86 CPU Ethernet Card DSP hardware FXS Portħ IP-PBX Hardware 101 Embedded PBX Asterisk Blackfin CPU FXO PortĨ IP-PBX Hardware 101 Many redundant parts removed Until now, running Asterisk on an embedded processor has meant switching IP calls only (no line interface hardware such as T1 or analog ports). 1 Embedded Asterisk and the Blackfin ProcessorĢ Topics Introduction Why Embedded? IP PBX Hardware 101įree Telephony Project and Open Hardware Status The Future Opportunitiesģ Introduction Paradigm shift away from x86/PCI cardsĮmbedded = IP-only and no DSP Echo cancellation and codecs not possible Analog Devices Blackfin Processor has the potential to change this situation Most people today are building Asterisk boxes using x86 processors and line interface hardware on PCI cards.
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