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SMART ARM-Based Microcontroller
AT13519: ATSAMR21 LED Driver with ZigBee
Light Link – Firmware User Guide
USER GUIDE
Introduction
The Atmel® SAM R21 LED Driver is a reference platform for a Dimmable
Light with a LED Driver implemented in firmware, which can be controlled
wirelessly over ZigBee® using a ZigBee-based remote control device.
This user guide explains the firmware components of the system.
Features
•LED Driver module implemented in firmware (no external driver IC
needed)
•Dimmable Light application as per ZigBee Light Link Specification –
implementation uses the Atmel BitCloud® SDK
•0.5% to 100% dimming using combination of analog and PWM
dimming
•Up to 95% efficiency
•Light control from the AVR477 Touch Remote Control
Atmel-42483A-ATSAMR21-LED-Driver-with-ZigBee-Light-Link_AT13519_User Guide-08/2015
Table of Contents
Introduction......................................................................................................................1
Features.......................................................................................................................... 1
1. Overview....................................................................................................................3
1.1. System Overview..........................................................................................................................3
1.1.1. ATSAMR21-LED-Driver (Dimmable) Light.....................................................................3
1.1.2. Remote Control..............................................................................................................4
2. Dimmable Light – The ATSAMR21-LED-Driver Board.............................................. 5
2.1. Source Code Organization........................................................................................................... 5
2.2. Project Configuration....................................................................................................................7
2.3. Configuration of Parameters.........................................................................................................7
2.4. Memory Footprint......................................................................................................................... 8
2.5. Operating Principles of the LED Driver.........................................................................................8
2.6. ZigBee Functionalities of the Dimmable Light............................................................................ 10
2.6.1. Joining a ZigBee Light Link Network........................................................................... 10
2.6.2. Unique MAC Address Storage ....................................................................................10
2.6.3. Information Sets/Clusters Supported by the Dimmable Light...................................... 10
2.6.4. Application Code Flow................................................................................................. 11
2.6.5. Light Control from the Remote.....................................................................................11
3. Remote Control – The AVR477 Touch Remote Control Board................................13
3.1. Status LED Indications on the AVR477 Remote........................................................................ 14
3.2. Resetting the Light to Factory New State from the AVR477 Remote......................................... 15
3.3. Controlling Multiple Lights from a Single AVR477 Remote Control............................................15
4. Related Documents................................................................................................. 16
5. Revision History.......................................................................................................17
Atmel AT13519: ATSAMR21 LED Driver with ZigBee Light Link – Firmware User Guide
[USER GUIDE]
Atmel-42483A-ATSAMR21-LED-Driver-with-ZigBee-Light-Link_AT13519_User Guide-08/2015
2
1. Overview
This document is a firmware user guide for the ATSAMR21-LED-DRIVER reference platform.
The ATSAMR21-LED-DRIVER is a reference design for a wireless dimmable light that uses the SAM R21
MCU to implement a firmware LED driver controlled from a remote control using ZigBee.
1.1. System Overview
The ATSAMR21-LED-Driver is built on a SAM R21 Xplained Pro (ATSAMR21-XPRO) board with modified
connectors, an add-on power component board, and an LED load board with diffuser.
The Atmel AVR477 remote control is used to control the ATSAMR21-LED-Driver board (Dimmable Light)
over ZigBee Light Link.
Figure 1-1 ATSAMR21-LED-Driver Board (Light) with AVR477 Remote Control
1.1.1. ATSAMR21-LED-Driver (Dimmable) Light
The ATSAMR21-LED-Driver board uses the SAM R21 MCU which is an IEEE ® 802.15.4 compliant SiP
incorporating an ARM® Cortex® M0+ based 32-bit microcontroller and a 2.4GHz RF transceiver.
The LED driver is implemented in firmware without using any external DC-DC LED driver IC.
This driver is integrated in the – The Atmel ZigBee PRO stack that supports the ZigBeeBitCloud SDK
Light Link (ZLL) and ZigBee Home Automation (ZHA) Profiles. This solution uses the ZigBee Light Link
(ZLL) profile reference application from BitCloud and this can be easily updated to be part of ZigBee
Home Automation (ZHA) networks.
The LED driver firmware implements a DC-DC buck converter, operating in boundary conduction mode to
provide constant current to the connected LEDs.
Atmel AT13519: ATSAMR21 LED Driver with ZigBee Light Link – Firmware User Guide
[USER GUIDE]
Atmel-42483A-ATSAMR21-LED-Driver-with-ZigBee-Light-Link_AT13519_User Guide-08/2015
3

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Varumärke: Microchip
Kategori: Inte kategoriserad
Modell: ATmega2564RFR2

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