Post by thread:[SX] SX/B I2C slave mode

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Rsadeika wrote:

Has anybody come up with any ideas as to how to use I2C slave mode, using SX/B? I thought I remember some discussion about this, but do not recall if anybody made any progress. I checked the SX/B commands, but that only deals with master mode, would be nice if it had a slave mode. Thanks Ray ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=286276 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Chet wrote:

Have you tried "Use I2C slave Virtual Peripheral" on the Paralllax page http://www.parallax.com/tabid/460/Default.aspx Chet ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=286276#m286284 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Rsadeika wrote:What you are refering to is the asm code, correct? I do not have the knowledge to incorporate that code into an SX/B format program, that would be something that JonnyMac, the expert, may want to take on. I was thinking that since I am talking about slave mode, a VP may not be necessary, just a sub may suffice.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Chet wrote:These are the files I have, They came with the UART/I2C board. I have tried it on the board as it came, but I have not experimented with it. If the slave processor can look for it's information on the bus via some handshaking, then the I2C commands should be doable in SX/B. There are some examples scattered around with handshaking like !ABC .... where the !ABC is the slave device address. Good luck.

Chet ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=286276#m286289 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:I looked into creating subroutines/functions -- not a good idea; if the I2C master blows up in the middle of a command you'll get hung up. The ISR version is really the only safe way to go. At the moment, I have no pressing need to use the SX as an I2C slave, but if I find a need I'll take Guenther's code and package it in an SX/B demo.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bernoulli wrote:In my opinion, it really is not that hard for the I2C Slave to deal with the I2C Master blowing up in the middle of the communication. One just simply needs to put a time limit for the Slave to see a change in the SCLK signal. If the time limit is exceeded the Slave shall deem the transmission to be faulty and thus go about its prior business.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Good point; and probably easier to manage in an interrupt.

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