howto use BS2 in I2C slave ??

Comments

• allanlane5 Posts: 3,815

  2007-02-26 15:38 edited 2007-02-26 15:38

  Is very difficult -- the BS2 wants to be 'master' in everything. I suppose you COULD use RCTIME or PULSIN to look for some other I2C 'master' device's clock -- but the BS2 could only recieve bits VERY slowly -- probably not keeping up with the 'remote' I2C master.
  
  On the other hand, the BS2 works GREAT as a SERIN 'slave' device, using RS232 signaling.
• Luc Posts: 8

  2007-02-27 10:32 edited 2007-02-27 10:32

  Yes i cant use RS232 for comunicat with my BS2, but if i want use two device BS2 in slave mode ??
  
  I want use one BS2 in master I2C mode et multi BS2 in I2C slave mode
  
  
  
  thank for your reply
  
  
  
  Luc
• Luc Posts: 8

  2007-02-27 11:12 edited 2007-02-27 11:12

  and it's possible to connect the PCF8584 at BS2 for use the BS2 in I2C slave mode ??
• allanlane5 Posts: 3,815

  2007-02-27 14:27 edited 2007-02-27 14:27

  The 'master' BS2 can easily talk to the 'slave' BS2 using SEROUT/SERIN communications. This takes fewer wires than I2C, also. And at 9600 baud, will be faster than any BS2 'pseudo-slave' I2C communications.
• Bruce Bates Posts: 3,045

  2007-02-27 15:25 edited 2007-02-27 15:25

  Gents -
  
  The PCF8584 is a PARALLEL to I2C chip which requires either a microcontroller with interrupt capability, or with polling capability, to recognize when there is traffic. The PCF8584 can operate in HOST or SLAVE mode.
  
  Regards,
  
  Bruce Bates
  
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• Luc Posts: 8

  2007-03-02 17:12 edited 2007-03-02 17:12

  yes if i use SEROUT/SERIN, isn't possbible to have multi slave BS2 whith only 2 wires
• allanlane5 Posts: 3,815

  2007-03-02 17:20 edited 2007-03-02 17:20

  Yes, if you use SEROUT/SERIN, it IS possible to have a multi-Slave BS2 network with only two wires (and a pull-up resistor. That's what those "Open" baud modes are about).
  
  Three wires (TX, RX, GND) would be more general.