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DALI on LPC Microcontrollers

NXP_Support's picture

 

DALI Software Development Kit

 

The DALI Software Development Kit (SDK) for the LPC11xx/LPC13xx contains an updated DALI Library for compliancy with the IEC 62386-102 and IEC 62386-201 standard. Parts of the IEC 62386-207 specification are also included.

The DALI slave (AN11174 with OM13026 board) and the USB to DALI master (AN11175 with OM13046 board) can be used in combination with the Windows 7 PC GUI to create a demonstration and evaluation setup as described in UM10553.

The SDK contains the example software, DALI library, a hardware description of both boards, documentation and is available for download: http://lpcware.com/content/nxpfile/an11174-and-an11175-lpc11xxlpc13xx-dali-release-20

The DALI slave OM13026 board and the USB to DALI master board OM13046 are available at NXP distributors.

 

DALI Slave OM13026                                                       DALI Master OM13046

 

 

System notes

 Controller side:

·         The LPC1100XL (up to 50 MHz - 45 DMIPS) offers enough performance to integrate DALI message coding/decoding and PWM generation in a single chip

·         Industry-leading low active power consumption of 110 uA/MHz for bus-powered devices

·         Storage of scene settings in non-volatile memory using EEPROM emulation in flash, or integrated EEPROM in LPC11E00 series

·         Up to four 16-bit and 32-bit timers, generating up to 11 PWM signals to control and dim the ballast

·         Reduced development complexity - software can be written in C

·         Reduced bill of materials - significant cost savings through Cortex-M0 architecture, plus many built-in peripherals to interface with lighting drivers and network in LPC1100XL

 Power stage:

·         LED dimming using the PWM input of the NXP UBA3070 DC-to-DC LED driver with up to 98% efficiency

·         SSL4101 provides mains isolation for both the RGB LED power stage and the DALI wires

·         Low component count and high efficiency through integrated PFC and flyback control functionality

·         GreenChip TEA1721 buck converter supplies LPC1100XL with high efficiency; no-load power consumption levels <10 mW

·         For more information please visit http://www.nxp.com/ssl

 

DALI Slave Implementation example (OM13026 board):

·        Contains isolated physical layer for the DALI bus with a Cortex M0 LPC111x microcontroller for the DALI protocol handling, and many I/O functions to steer external lighting drivers for solid state or compact fluorescent lighting applications

·         Schematics, gerbers and BOM also available to speed up development

·         Up to four PWM signals available to independently drive different lighting units

·         Frequency and resolution of the signals is software programmable

·         ON_OFF signal can be used independently from the PWM signals to switch a lighting driver into an OFF or ON state

·         I2C-bus pins can be used to externally connect other devices like EEPROM or a temperature sensor

·         Analog A/D input is available via pin 8

·         IO signal is left open for the end user

·         UART, I2C and A/D converter functionality not included in the software release

 

 


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