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Camera control interface slave device to slave device communication

  • US 9,892,077 B2
  • Filed: 10/06/2014
  • Issued: 02/13/2018
  • Est. Priority Date: 10/07/2013
  • Status: Active Grant
First Claim
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1. A master device, comprising:

  • a bus interface circuit to couple to a control data bus shared with a plurality of slave devices; and

    a processing circuit coupled to the bus interface circuit and configured to;

    control access to the control data bus by the plurality of slave devices;

    receive a slave device to slave device communication request from a slave device requesting access to the control data bus, wherein the slave device to slave device communication request is for a direct data transfer between the slave device and another slave device of the plurality of slave devices while bypassing the master device, and wherein the slave device to slave device communication request includes a requested maximum number of words to be transferred from the requesting slave device to another slave device over the control data bus; and

    send, to the requesting slave device, a response granting the request, wherein the response grants the request by including a word limit number in the response that is equal to or greater than a maximum number of words specified in the request.

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