examples/ecos_lpc2138_sja1000/src/elevation/encoder/ReadMe.txt
author etisserant
Mon, 22 May 2006 09:46:29 +0200
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NVRAM is not related ro CAN !!
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               ____     ____     ______    __  ___    ______   ____
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              / __ \   / __ \   / ____/   /  |/  /   / ____/  / __ \
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             / / / /  / /_/ /  / __/     / /|_/ /   / __/    / / / /
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            / /_/ /  / _, _/  / /___    / /  / /   / /___   / /_/ /
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            \____/  /_/ |_|  /_____/   /_/  /_/   /_____/   \___\_\
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					http://www.oremeq.qc.ca/
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This is an absolute rotary encoder gateway to CANopen.
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We used for this demo an absolute rotary encoder from Siemens Automation
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model: 6FX2001-5SS12  ,  see the 6FX2001-5SS12.jpg for an idea of the look. 
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This Encoder work with the SSI31 protocol. The 31 mean 31 bits. And SSI
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is a special version of the SPI protocol.
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The pinout for this encoder is:
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	 1=Clock -
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	 2=Clock +
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	 3=Data +
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	 4=Data -
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	 5=n.c.
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	 6=n.c.
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	 7=n.c.
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	 8= ????
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	 9=n.c.
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	10=n.c.
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	11=+10 to 30 VDC @ 250mA
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	12=GND
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Our LPC2138 implement the SSI31 protocol to pool the encoder
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and fill the DS-406 specification for CANopen.
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You can find this specification at: http://www.can-cia.org/
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Ask for the document: CiA DS 406 V3.1: CANopen device profile for encoder
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To build this project, see $CANFESTIVAL_HOME/drivers/ecos_lpc2138_sja1000/ReadMe.txt
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to prepare your environment.
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See the schematic.jpg in this directory.
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		Enjoye!