DALI

• wikipedia
• DALI explained
• DALI at ledlightbulb

• picture at the end of page

• A DALI Checklist: Things to Keep in Mind

TI

• Files for slaa422a

• Including:

CCS project

IAR project

Source code seems to be common!

• TI Digital Addressable Lighting Interface (DALI) Implementation Using MSP430 Value Line Microcontrollers slaa422a

Freescale

• Digital Addressable Lighting Interface (DALI) for Lighting Networks Reference Design Freescale

AVR

• DALI (Digitally Addressable Lighting Interface) with Atmel AVR

The DALI-Bus is a "voltage-bus". A voltage between 9.5V and 22.5V is called high level and is the non-active/idle-state. 
A voltage between -6,5V and 6.5V is called low level. The master or slaves pulse the bus to low level when transferring data. 
A master could also "push/pull" the bus. Isolation of ballasts is mandatory (typically done with opto-couplers). 
The current on the bus is limited to 250mA. Since there is a rather high signal-noise-ratio. 
The two bus-wires can in the same cable as the mains-power. The bus does not have to be "daisy-chained".

• NXP Brings ARM Cortex-M0 to DALI and DMX512 Lighting Control Systems