SYSTEM AND METHOD FOR DYNAMICALLY ALLOCATING ADDRESSES TO DEVICES COUPLED TO AN INTEGRATED CIRCUIT BUS

• US 20060123168A1
• Filed: 11/17/2005
• Published: 06/08/2006
• Est. Priority Date: 12/03/2004
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lang, Yu-Ming
• Application Number:
  US11/164,280
• Publication Number:
  US 20060123168A1
• Time in Patent Office: Days
• US Class Current: 710/110
• CPC Class Codes: G06F 13/4256 using a clocked protocol
• CPC Class Codes: G06F 2213/0016 Inter-integrated circuit (I2C)
• CPC Class Codes: G06F 2213/0052 Assignment of addresses or identifiers to the modules of a bus system

Abstract

The present invention provides a system for dynamically allocating addresses to devices (110, 120, 130) coupled to an integrated circuit bus (102). The system includes a master processor (101) and a plurality of slave processors (111, 121, 131) corresponding to the devices. The master processor is used for generating a plurality of addresses one by one which are different from each other, and sending an instruction to the integrated circuit bus in order to assign one of the plurality of addresses to one of the devices whose address is a default address at that time. Each of the plurality of slave processors includes a plurality of functions of: presetting an address of a corresponding device of the devices to the default address, retrieving the instruction and resetting the address of the corresponding device of the devices according to the instruction.

Claims

1. A system for dynamically allocating addresses to devices coupled to an integrated circuit bus, the system comprising:

a first slave processor that presets an address of a first device of the devices coupled to the integrated circuit bus to a default address;

a master processor that assigns a first address to the first device whose address is the default address at that time; and

a second slave processor that presets an address of a second device connected to the integrated circuit bus downstream of the first device to the default address after the first address is assigned to the first device, the master processor assigning a second address to the second device whose address is the default address at that time, wherein the second address is different from the first address.

2. The system according to claim 1, wherein the integrated circuit bus is an inter integrated circuit bus.

3. The system according to claim 1, further comprising:

the master processor assigning different addresses to others of the devices in sequence.

4. The system according to claim 1, wherein the default address is a predetermined constant address, and is different from any of the addresses assigned by the master processor to all of the devices.

5. The system according to claim 1, further comprising:

an electrical bus for connecting the devices in series, each of the devices including an in port and an out port for the electrical bus, and a Vcc power supply which controls voltages of the in port and out port;

wherein,

the in port of the first device is initialized with a high voltage, in ports of others of the devices are initialized with a low voltage; and

the out port of the first device is downstream the electrical bus of the in port of the second device.

6. The system according to claim 5, wherein the first slave processor presets an address of the first device to the default address after the Vcc power supply of the first device sets an voltage of the in port of the first device to a high voltage.

7. The system according to claim 5, further comprising:

the Vcc power supply of the first device setting an voltage of the out port of the first device to a high voltage, after the first address is assigned to the first device.

8. A system for dynamically allocating addresses to devices coupled to an integrated circuit bus, the system comprising:

a master processor for;

generating a plurality of addresses one by one which are different from each other; and

sending an instruction to the integrated circuit bus in order to assign one of the plurality of addresses to one of the devices whose address is a default address at that time; and

a plurality of slave processors corresponding to the devices, each of the plurality of slave processors including a plurality of functions of;

presetting an address of a corresponding device of the devices to the default address;

retrieving the instruction; and

resetting the address of the corresponding device of the devices according to the instruction.

9. The system according to claim 8, wherein the integrated circuit bus is an inter integrated circuit bus.

10. The system according to claim 8, further comprising a plurality of power supplies corresponding to the devices, each of the plurality of power supplies controlling a voltage of a corresponding device of the devices, in order that an address can be set to the corresponding device.

11. A method for dynamically allocating addresses to devices coupled to an integrated circuit bus, the method comprising the steps of:

controlling, by a first power supply, a voltage of a first device of the devices coupled to the integrated circuit bus, in order that an address can be set to the first device;

presetting the address of the first device to a default address;

assigning a first address to the first device;

controlling, by a second power supply, a voltage of a second device of the devices coupled to the integrated circuit bus downstream of the first device, in order that an address can be set to the second device;

presetting the address of the second device to the default address; and

assigning a second address to the second device, the second address being different from the first address.

12. The method according to claim 11, wherein the integrated circuit bus is an inter integrated circuit bus.

13. The method according to claim 11, wherein each of the first power supply and the second power supply is a Vcc power supply.

14. The method according to claim 11, further comprising the step of assigning different addresses to others of the devices in sequence.

15. The method according to claim 14, wherein the default address is a predetermined constant address, and is different from any of the addresses assigned to all of the devices.