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EM2420/AVR

Video: Ember Platform Overview & Support Resources

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Introductory module for Ember training curriculum.

Explains and contrasts the Ember chip platforms that are offered, then explains what support resources are available for developers/designers seeking product information/support.

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Manufacturing Test Guide

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This document describes the different options for integrating RF testing and characterization into standard test flows. This application note is intended for Ember customers who are moving from the early prototype development stage to the manufacturing production environment and need assistance with manufacturing test. The specific target audience is test engineers developing test processes for their Ember-enabled products. Revision F.

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120-5016-000_AppNote_MfgTestGuidelines.pdf

Video: MAC and PHY concepts for ZigBee design

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Ember training curriculum video about IEEE 802.15.4 MAC and 2.4GHz DSSS PHY.

Explains the basics of the MAC and PHY used at the lowest levels of the ZigBee stack architecture and how this relates to ZigBee product design.

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Application Note 5000 - Using JTAG for AVR platform

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Application Note 5000 (document number 120-5000-000).

This document describes how to set up the IAR EWAVR toolchain for building HEX files for the AVR ATmega MCU and how to perform JTAG debugging with an AVR JTAG ICE.

While this document was originally written in reference to Ember’s legacy EM2420/AVR platform, most of the content is also applicable to AVR host MCUs used with the EM260 platform.

What output power can I expect / should I use if I am using a power amplifier [PA] on my device?

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Concerning the radio transmission power value (radioTxPower member of EmberNetworkParameters struct), many of Ember's sample applications use a default value if -1 (which is -1 dBm).  This value comes from a desire to keep the code compatible across Ember platforms, since the EM2420 legacy solution supported only a maximum output power setting of -1 dBm.  The EM2xx chips, however, are capable of being set as high as 3 (for a nominal effective radiated power [ERP] of about +3 dBm, give or take about 1.5 dBm variance across chips), so you can feel free to adjust this as needed.

Adding external SRAM to the Atmega128L+EM2420

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Applications requiring additional SRAM on the EM2420 platform can use the memory bus available on the Atmega128L to easily access this RAM from the embedded software. This HOWTO explains how to connect everything and configure the IAR compiler and HAL software to do this.

Adding external RAM can be done with very little software modification because the extra memory is treated like a continued portion of the existing internal memory.

What does the etrim.exe utility do?

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Etrim is an Ember utility used to post-process the binaries for AVR MCUs, including the ATmega128L (used with the EM2420) and the ATmega32L (used with the EM260). It does two things related to the Ember bootloaders for AVR: For the V1 standalone bootloader (BIN files), it trims off leading and trailing zeros that would interfere with the bootloader (hence, its name). It also adds some header info and some tags to create EBL files for use with the V2 Standalone bootloader.

Where can I find information on using the Ember Standalone Bootloader with my application?

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I want to integrate the Ember Standalone Bootloader into my application so that I no longer require InSight Desktop or em2xx_load.exe to upload firmware to my devices. Is there an example somewhere of how to do this?

For examples of using the standalone bootloader in your application, please refer to the Standalone Bootloader Demo application, which can be found in /app/standalone-bootloader-demo in EmberZNet installations ofr EM250 and AVR+EM2420. (Also note that all sample application are described in detail in /app/sampleApps.htm.)

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