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79 lines
2.4 KiB
Markdown
79 lines
2.4 KiB
Markdown
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avr_radio_power
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===============
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Motivation
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-----------
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Spins over different radio seting for the Atmel radio. The motivation is to
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get understanding and also to get correct data for avrora and Contiki
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simulations. Program loops over different TX-power setting and measures
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RX consumption also radio off and idle power use in SLEEP_MODE_PWR_SAVE is
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measured. Program disables radio duty cycling (RDC) and sets MCU in deep
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sleep mode to only get radio consumption.
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Usage
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-----
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The different setting is printed on the terminal. You need a way to measure
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the current consumption and relate to the tests.
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Example
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-------
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Program printout with added measurements. The used board was RSS2 mote
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with a AtMega256RFR2 CPU. Max is when 0xFF is written to the RPC register.
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Run/setup Current use
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------------------------------------------------
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TX with PWR=0 RPC=0x00 17.80 mA (MAX TX-pwr)
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TX with PWR=1 RPC=0x00 17.74
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TX with PWR=2 RPC=0x00
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TX with PWR=3 RPC=0x00
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TX with PWR=4 RPC=0x00
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TX with PWR=5 RPC=0x00 17.43
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TX with PWR=6 RPC=0x00
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TX with PWR=7 RPC=0x00
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TX with PWR=8 RPC=0x00
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TX with PWR=9 RPC=0x00 17.68
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TX with PWR=10 RPC=0x00
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TX with PWR=11 RPC=0x00
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TX with PWR=12 RPC=0x00
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TX with PWR=13 RPC=0x00
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TX with PWR=14 RPC=0x00
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TX with PWR=15 RPC=0x00
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RX with RPC=0x00 -------------------- 13.43 (RX)
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-------------------------------------------------
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TX with PWR=0 RPC=0xff 14.63 mA (MAX TX-pwr)
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TX with PWR=1 RPC=0xff
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TX with PWR=2 RPC=0xff
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TX with PWR=3 RPC=0xff
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TX with PWR=4 RPC=0xff
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TX with PWR=5 RPC=0xff
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TX with PWR=6 RPC=0xff 14.45
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TX with PWR=7 RPC=0xff
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TX with PWR=8 RPC=0xff
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TX with PWR=9 RPC=0xff
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TX with PWR=10 RPC=0xff
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TX with PWR=11 RPC=0xff
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TX with PWR=12 RPC=0xff
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TX with PWR=13 RPC=0xff
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TX with PWR=14 RPC=0xff
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TX with PWR=15 RPC=0xff
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RX with RPC=0xFF -------------------- 7.11 (RX)
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RX radio off 0.001 mA
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Comments
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--------
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We see TX consumption decreases from 17.80 to 14.63 mA using Max RPC (0xFF).
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NOTE! For RX 13.43 to 7.11 mA. Nice. This actual measurements.
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The avr-rss2 port adds support for the AtMegaXXXRFR2 including the new RPC
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function.
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References
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----------
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Atmel application note. AT02594: Smart Reduced Power Consumption Techniques
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[Here] (http://www.atmel.com/images/atmel-42356-smart-reduced-power-consumption-techniques_applicationnote_at02594.pdf)
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Multimeter UNI-T UT61E with USB-logging.
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