公开(公告)号：US20160205066A1

公开(公告)日：2016-07-14

申请号：US14984321

申请日：2015-12-30

Applicant: Texas Instruments Incorporated

Inventor： Hussain K. Attarwala ,  Ankit Khanna ,  Dimitar T. Trifonov ,  Vasco D. Polyzoev ,  Biraja P. Dash

IPC: H04L29/12 ,  H04L12/40 ,  H04L12/24

Abstract: Devices, systems and methods are disclosed for assigning unique addresses to slave devices in a system comprising a host controller and multiple slave devices connected in a daisy chain configuration. The host controller initiates the address programming protocol, resulting in address assignment commands propagating along the daisy chain to each of the slave devices. Upon receiving an address assignment, each slave device issues an updated address assignment for the neighboring downstream slave device in the daisy chain. In this manner, slave devices are uniquely addressed using a single command, such that slave devices do not require factory-programmed device addresses. Also disclosed are communication protocols that allow the host controller to communicate with each of the daisy-chained slave devices or with certain subsets of the slave devices. Via the protocol, the host controller can communicate with any slave device in the daisy chain, while utilizing only the daisy chain connections that link the individual slave devices.

Abstract translation: 公开的设备，系统和方法用于在包括主控制器和以菊花链配置连接的多个从设备的系统中为从设备分配唯一地址。 主机控制器启动地址编程协议，导致地址分配命令沿着菊花链传播到每个从设备。 在接收到地址分配时，每个从设备向菊花链中的相邻下游从设备发布更新的地址分配。 以这种方式，使用单个命令来唯一地寻址从设备，使得从设备不需要工厂编程的设备地址。 还公开了允许主机控制器与菊花链连接的从设备中的每一个或从设备的某些子集进行通信的通信协议。 通过该协议，主机控制器可以与菊花链中的任何从设备进行通信，同时仅使用连接各个从设备的菊花链连接。