CN1299205C - Method for monitoring device by SMBus chip on PCI plate and its device - Google Patents
Method for monitoring device by SMBus chip on PCI plate and its device Download PDFInfo
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- CN1299205C CN1299205C CNB2004100608371A CN200410060837A CN1299205C CN 1299205 C CN1299205 C CN 1299205C CN B2004100608371 A CNB2004100608371 A CN B2004100608371A CN 200410060837 A CN200410060837 A CN 200410060837A CN 1299205 C CN1299205 C CN 1299205C
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- pci
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Abstract
The present invention discloses a method for monitoring elements by an SMBus chip on a PCI board and a device thereof, which relates to bus extension in a computer and the application of a chip of the computer. In the method, nodes of an SMBus are extended; an SMBus bus chip is used on a PCI board for measuring parameters, such as, voltage, rotation speed and temperature, of the devices; the temperature is used as a feedback signal for being input into the chip, the internal arithmetic of the chip is monitored, the output is controlled, and the rotation speed of a fan is controlled by an amplifying and driving circuit; thereby, a closed loop is formed. The device is composed of a monitoring chip on the PCI board, a temperature sensor, the amplifying and driving circuit, the fan, a power supply, a rotation speed measurement matching circuit, a partial voltage circuit and the SMBus. The present invention has the advantages that the PCI board which can be monitored is formed, the rotation of the fan on the board is measured and controlled, noise is reduced, the environment is protected, energy is saved, and communication with a host computer is realized through the SMBus, which contributes to the management of computer equipment.
Description
Technical field
The present invention relates to the expansion and the application of universal serial bus in the computer and device thereof, specifically, relate to a kind of on the PCI plate method and the device thereof with System Management Bus (also claiming the SMBus bus) integrated circuit (IC) chip monitoring device.
Background technology
Pci bus PCI (peripheral assembly interconnect) bus is the Computerized local bus that is independent of CPU, adopted unique intermediate buffer design, can directly hang over the peripherals of high speeds such as display card, sound card, network interface card, hard disk controller on the cpu bus, many cooling fans that have in these integrated circuit boards, cooling fan is a constant rotational speed, allows 5 pci expansion slots on the computer usually.Intel in 1992 has proposed the pci bus of 32-bit simultaneously in issue 486 processors.The pci bus of Ti Chuing is operated under the 33MHz frequency the earliest, transmission bandwidth has reached 133MB/s, along with to more high performance requirement, the pci bus that proposed 64-bit in 1993, proposed again afterwards the frequency upgrading of pci bus to 66MHz, what extensively adopt at present is the pci bus of 32-bit, 66MHz.Difference according to the PCI specification has versions such as PCI1.0, PCI2.2.The PCI-SIG of PCI standardization body has increased the support to the SMBus bus in the engineering change notice (ECN) of issue on October 5th, 2000, application person has manufacturers such as Intel, uses the condition that provides for the SMBus bus chip on PCI like this.Also occurred successively on the market PCI is gone up the mainboard that the SMBus bus is supported.PCI-SIG has announced up-to-date 3.0 standards of PCI specification at 2004-4-27, new standard on speed without any lifting, the operating voltage of pci bus has been reduced to 3.3V by present 2.3 editions 5.0V, but for general pci card, still can compatible 3.3V of while and 5V voltage.New PCI3.0 standard will be supported PCI66, PCI-X, Mini PCI and LowProfile PCI etc.All in all, the PCI3.0 standard only is to the replenishing of 2.3 versions, and belongs to conventional upgrading behavior.
The structure and the operation conditions of the present computer of computer hardware monitoring circuit become increasingly complex, therefore most of computers all are equipped with the chip from observation circuit, can monitor the operation conditions of host computer such as various voltage, temperature, rotation speed of the fan etc. in real time, mainboard monitoring chip (for example W83L785, LM87, LM63) is generally programming device, have hardware A/D conversion and I/O interface, and chip has the SMBus bus.The dominant frequency of CPU and integrated circuit and integrated level are improving constantly, therefore can produce a large amount of heats, the temperature that makes computer and PCI go up device rises, usually use fan to come ventilation and heat, need the monitoring CPU temperature, in these supervisory circuits widespread use pulse-length modulation (PWM) and automatic control technology, supervisory circuit can be regulated rotation speed of the fan automatically according to the temperature signal of detected element in the computer operational process, the hardware monitoring circuit can be controlled fan according to design temperature and rotate, to the CPU heat radiation, when temperature descended, rotation speed of the fan reduced automatically, when temperature rises, the wind speed rotating speed rises automatically, has reduced fan noise like this, has saved the electric weight use, prolonged fan life, can guarantee that computer system effectively works.System Management Bus (SMBus bus) is the chip chamber serial communication bus that Intel proposes, and comprises a data lines SDA and a clock line SCL, and 2 lines must be connected on the power supply with pull-up resistor during work.Each bus device all has an address, and total line length can reach more than 8 meters, can constitute the expansion of multi-computer system and peripheral components easily, and can be with the speed full duplex synchronous data transmission of 100Kbps.The advantage of SMBus is, it supports many master controls, and wherein any equipment that can send and receive can become master controller, and bus interface all has been integrated in the device, do not need to add the bus interface circuit in addition, the characteristics of plug and play (Plug and play) are arranged.The peripheral components of all band SMBus interfaces all has answering, in computer, be widely used: the south bridge family chip ICH3 of Intel, ICH4, ICH5, ICH6 (I/O Controller HUB 6), or with the South Bridge chip VIA8233 of the product compatibility of Intel, AMD768 etc. all can communicate with mode and the miscellaneous equipment of serial SMBus.Above the chip of described computer hardware monitoring circuit promptly be external unit on the SMBus bus.All possess the SMBus bus functionality at almost every Intel computer and compatible computer, provide SMBus bus interface such as PCI slot on a lot of computer main boards, connect peripheral hardware for the user.
I
2The C bus is by the I of Philips exploitation
2C (I2C) bus has standard and numerous band I of standard
2The peripheral components of C interface has formed perfect serial expansion bus, I
2The characteristics of C are the independence of structure and the simplicity that the user uses.The I2C bus has strict standard, and as the electrical specification of interface, signal sequence, bus management rule etc., and the SMBus bus is I
2A subclass (subset) of C bus/protocol, a lot of I
2The compatible SMBus bus of C bus device can directly be used on the SMBus of computer system bus, specifically sees each device description.
Though prior art has had above-mentioned all development, but the monitoring of equipment only limits to the supervisory circuit on computer main board in to computer, do not solve the monitoring that PCI goes up device, as high euthermic chip cooling fan monitoring on the monitoring of important chip operating voltage, the PCI plate on the PCI plate, fan does not have rotational speed regulation on the PCI plate, also be unable to find out their state, the height of the last device temperature of PCI is irrelevant with rotation speed of the fan, can not regulate fan speed automatically according to the temperature height, fan is in the full speed running state all the time, and certain noise is arranged.
Summary of the invention
Purpose of the present invention is exactly the above-mentioned defective at prior art, and a kind of method with device on the SMBus bus chip monitoring computer PCI plate is provided; Specifically, be exactly the problems such as temperature, rotation speed of the fan and voltage measurement of device on the settlement computer PCI plate, and then regulate rotation speed of the fan on the PCI plate automatically, reduce noise according to its temperature height, save power, and by SMBus bus communication reading and writing data.
The object of the present invention is achieved like this:
1, method
As shown in Figure 1, this method has the following step:
1. on the SMBus bus that has ICH South Bridge chip main device node and interface I/O chip node, increase bus peripheral components node, SMBus interface by the PCI slot is connected to the chip that has the SMBus bus interface on the PCI plate, the SMBus interface of each PCI slot all can connect the chip with SMBus bus interface, this chip has the measurement temperature, voltage, the function of rotation speed of the fan and control rotation speed of the fan, the temperature of equipment and device on this chip measurement of use on PCI PCI plate, voltage, parameters such as rotation speed of the fan, control fan speed simultaneously, communicate by letter with the SMBus bus apparatus on the host computer by the SMBus bus;
2. use the built-in control function of SMBus bus chip, with the temperature of equipment and device on the temperature sensor measurement PCI plate, make feedback signal input chip with temperature, by chip computing output, through amplification driving circuit, the control rotation speed of the fan constitutes closed-loop control system;
The chip that on the SMBus bus, uses, can for a kind of can with the bus compatible band of SMBus I
2C or title I2C Bus Interface Chip.
But 2, press the step component devices of this method
As shown in Figure 2, this device is made up of the chip with SMBus bus interface (1), temperature sensor (2), amplification driving circuit (3), fan (4), power supply (5), tachometric survey match circuit (6), bleeder circuit (7) and SMBus bus (8);
Chip (1) is connected with temperature sensor (2), amplification driving circuit (3), tachometric survey match circuit (6), bleeder circuit (7) and SMBus (8) bus respectively;
Fan (4) is connected with amplification driving circuit (3), tachometric survey match circuit (6) respectively;
Power supply (5) is connected with chip (1), amplification driving circuit (3), fan (4) respectively;
The existing direct supply that the working power of device uses PCI to provide.
Wherein, described chip (1) can be a kind of I that can be compatible with SMBus bus (8)
2C (I2C) bus chip.
The principle of work of this device is:
On the heater members on the computer PCI plate or be attached with temperature sensor (2), the output terminal of temperature sensor (2) is connected to the temperature survey port of chip (1), and temperature sensor (2) uses semiconductor transducer or thermistor.
The input end of amplification driving circuit (3) is connected to the rotating speed control output end mouth of chip (1), the working power of the output control fan (4) of amplification driving circuit (3); This power supply uses the power supply (5) on computer PCI, and with computer host power supply altogether.
The pulse that fan (4) rotate to produce is connected to the fan speed measurement port of chip (1) by tachometric survey match circuit (6), finishes the rotating speed counting by chip (1).
The working power circuit of device has connecting line on the PCI plate, is connected to the voltage measurement port of chip (1) by bleeder circuit (7), finishes the A/D translation operation in chip (1).
The PCI slot that the SMBus bus (8) of computer is connected to is connected to chip (1) from the PCI plate, is used for sending and accepting data.
3, the present invention has the following advantages and good effect.
1. because be to go up device with SMBus bus chip monitoring computer PCI, its method and apparatus is simple.
2. after forming PCI plate monitoring system, can measure the operating voltage and the temperature of device on the plate, rotation speed of the fan on the adjusting plate reduces noise, environmental protection and energy saving, and communicate by letter with host computer by SMBus bus (8), help equipment on the administration PC I.
3. ratio of performance to price height has broad application prospects.
Description of drawings
Fig. 1-computer SMBus bus expansion synoptic diagram;
Fig. 2-this device circuit is formed block scheme;
The circuit theory diagrams of Fig. 3-embodiment 1;
The circuit theory diagrams of Fig. 4-embodiment 2;
Among Fig. 2:
SMBus bus chip on the 1-PCI plate;
The 2-temperature sensor;
The 3-amplification driving circuit;
The 4-fan;
The 5-power supply;
6-tachometric survey match circuit;
The 7-bleeder circuit;
The 8-SMBus bus.
Specific embodiments
The present invention is further described below in conjunction with drawings and Examples.
Intel series computer (PC, server, workstation) and on the mainboard of clone be integrated with South Bridge chip, South Bridge chip inside provides SMBus primary controller, with ICH5 (82801EB) is example, ICH5 inside provides a SMBus primary controller, it comprises a SMBus master control interface, for processor and SMBus bus external device (slave unit) communication provide condition, have only master controller to realize management and to detect to the SMBus bus, as initial, stop, tranmitting data register etc., as not with the interface device of CPU, in bus, can only do to use from device, all are read, write operation all can reduce the master mode of SMBus bus, write operation is main send mode, and read operation is main accepting method.The compatible most I of the SMBus mode of operation of above-mentioned ICH5
2The C bus device.The SMBus bus interface device has one 7 bit address, can expand a plurality of bus devices, and the present invention uses PCI to go up the SMBus bus chip as bus slave.
In the A of the PCI slot face former designs of 40,41 pin (before the PCI2.2) all is to keep (Reserved), is SMBCLK, SMBDAT after ECN change design, i.e. the clock line of SMBus bus and data line.Should note not being all to have laid the SMBub bus during use at the PCI of all computer main boards slot.
Following embodiment 1 and embodiment 2 circuit have all used the chip of band SMBus bus, these chips are usually used in computer motherboard hardware monitoring circuit, rotating speed control as cpu temperature monitoring and cpu fan, its using method and circuit develop in the chip instructions, here can be transplanted on the supervisory circuit of device on the computer PCI plate, main difference is to change the temperature monitoring object on the PCI plate heater members, controlled fan becomes the fan of device on the PCI plate (also miscellaneous equipment) cooling, and the monitoring of chip and communication role are constant.
Embodiment 1
As Fig. 3, computer uses Intel desktop computer mainboard in this example, model is D865PES0, and mainboard has 3 PCI slots, has SMBus bus expansion interface on No. 2 PCI slots of this mainboard, connect SMBCLK and SMBDAT from it to the PCI equipment monitoring apparatus, 7 pin and 8 pin that promptly connect LM63 use the LM63 chip to make monitoring chip in the circuit, LM63 is a slave unit on the SMBus bus here, the address of devices of LM63 is 1001100, and the major function of LM63 is as follows:
Use 2N3904 transistor or PN junction thermometric, D+, D-hold input
Automatically revise self-heating effect
Support built-in 2 utmost point pipe thermometric modes of P4 or P4-m processor
Integrated PWM function of controlling fan rotating speed, PWM holds output
8 grades of speed changes able to programme are regulated, and reduce noise
Have the rotation speed of the fan counting, TACH holds input
Register compensation offset temperature
Multi-functional anti-ALERT/ rotating speed counting is selected input
10 bit digital counting, minimum 0.125 degree of differentiating of temperature
The SMBus2.0 specification is supported the overtime TIMEOUT that overflows
Compatible LM86 family device
The 8 pin design of simplifying
See list of references 4 for details
Here LM63 is a monitoring chip, working power is used 3.3V voltage, the existing power supply of power supply source computer, on the D+ of LM63 and D-terminal, insert 2N3904, be installed in 2N3904 on the device of PCI plate as sensor, the temperature of sensing device or device, in LM63, finish the A/D conversion, 4 pin output pwm signals from LM63, through R1, R2, Q1 forms amplifying circuit, drive fan, and the tachometric survey of fan is through R3, R4, the match circuit that R5 forms, 6 pin input speed count pulses from LM63, like this according to the temperature variation of the device heating parts on the PCI plate, the temperature varitrol that described device is formed can reduce or the rotating speed of rising fan, and relevant control algorithm is carried out in LM63, by 7 pin and 8 pin of LM63, the SMBus bus can transceive data.Fan uses+12 power supplys in the circuit.Device can be generate heat A/D chip, the D/A chip of bigger display chip, I/O collection plate.The circuit board of this device places on the PCI expansion board of host computer.
Embodiment 2.
Invention circuit theory such as Fig. 4, computer uses Intel desktop computer mainboard in this example, model is D865PERL, mainboard has 5 PCI slots, on No. 2 PCI slots of this mainboard, have SMBus bus expansion interface,, promptly draw SMBDATA and SMBCLK on the SMBus bus to computer PCI board device supervisory circuit from A face 40,41 pin of PCI slot, the SMBus bus that connects chip is to SCL and the SDA of circuit W83L785.The W83L785 that uses in PCI monitoring of tools circuit is usually used in the hardware monitoring circuit of notebook computer, the address of devices of W83L785 is 0101101, but its monitoring parameter comprises: voltage, temperature, rotation speed of the fan etc., built-in 8 ADC, 2 groups of PWM output control rotation speeds of the fan are provided, SMI#, OUT# signal and GPIO are provided, the compatible SMBus bus interface of band I2C/, by application software and BIOS, the user can monitor whole parameters at any time, and the information that when parameter is out-of-limit, gives a warning, the user can be provided with the high and low limit value of parameter voluntarily.
The major function of W83L785 is as follows:
2 temperature survey passages, TDX1, TDX2 support semiconductor and thermistor (temperature) sensor
4 voltage measurement passages, 3.3V, 2.5V, 1.5V, V
Core
2 groups of PWM rotation speed of the fan control outputs, PWM1, PWM2
The input of 2 groups of rotation speed of the fan countings, FAN1, FAN2
The out-of-limit interval of parameter that is provided with able to programme
The management of support application software
The 12C serial bus interface, SCL, SDA
Support Intel application program LMCD
The interruption guard signal is arranged
The encapsulation of 20 pin
Working power 2.7V～5.5V
See list of references 3 for details.
Monitor the working condition of device on the PCI plate among Fig. 4 with W83L785, the input end of measuring at 2.5V is connected to resistance R 6, R7 constitutes bleeder circuit, make it the input voltage range of matching chip, equally also can use other voltage measurement end monitoring voltage of this chip, undertake the task of hardware monitoring on the PCI plate.D1 and D2 are used for temperature survey among Fig. 5, from VTIN1 and VTIN2 input signal.Rotate with PWM control fan, the rotating speed of fan can be measured, and forms tach signal with R3, R4, R5 and measures match circuit, and R10, R11 are pull-up resistors.Obviously also transplant the fan automatic temperature control system of computer hardware monitoring circuit here easily, drive Q with D1 temperature sensor, PWM1 output, the control function of application chip constitutes closed-loop system, and relevant control algorithm is carried out in W83L785.On this circuit use computer PCI+the 5V power supply.Do not use in general I/O (GPIO#) on the chip and this example of look-at-me.The circuit board of this device places on the PCI expansion board of host computer.
List of references
1、
http://www.pcisig.com
2, He Limin, " design of I2C bus application system ", publishing house of BJ University of Aeronautics ﹠ Astronautics
3、W83L785.pdf.
http://www.winbond.com/
4、LM63.pdf，
http://www.national.com/
5、
http://www.intel.com/
6、
http://www.smbus.org/
Claims (2)
1, a kind of method of on the PCI plate, using SMBus bus chip monitoring device,
It is characterized in that the following step is arranged:
1. host computer PCI tank systems management bus SMBus is expanded, be connected on the PCI plate by the SMBus interface on the motherboard PCI, being provided with the SMBus bus chip on this PCI plate is the circuit that core is formed, the circuit that this chip is formed has the function of measuring temperature, voltage, rotation speed of the fan and control rotation speed of the fan, measure temperature, voltage, the rotation speed of the fan parameter that PCI goes up device with this chip, control fan speed simultaneously, communicate by letter with main equipment on the host computer SMBus bus by the SMBus bus;
2. use the built-in control function of expansion SMBus bus chip, use sensor measurement PCI to go up the temperature of device, make feedback signal input chip with temperature, by chip computing output, through amplification driving circuit, control rotation speed of the fan formation closed-loop system.
2, by the described a kind of method of on the computer PCI plate, using SMBus bus chip monitoring device of claim 1,
It is characterized in that: the chip that on the SMBus bus, uses, can for a kind of can with the bus compatible I of SMBus
2The C bus chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100608371A CN1299205C (en) | 2004-09-13 | 2004-09-13 | Method for monitoring device by SMBus chip on PCI plate and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100608371A CN1299205C (en) | 2004-09-13 | 2004-09-13 | Method for monitoring device by SMBus chip on PCI plate and its device |
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| CN1598782A CN1598782A (en) | 2005-03-23 |
| CN1299205C true CN1299205C (en) | 2007-02-07 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7604399B2 (en) * | 2007-05-31 | 2009-10-20 | Siemens Energy, Inc. | Temperature monitor for bus structure flex connector |
| CN101825938A (en) * | 2010-04-15 | 2010-09-08 | 山东高效能服务器和存储研究院 | Centralized control management method for large server radiator fan |
| CN102866941B (en) * | 2011-07-04 | 2018-03-30 | 技嘉科技股份有限公司 | The control method and its control system of computer apparatus |
| CN103138959A (en) * | 2011-11-24 | 2013-06-05 | 华为技术有限公司 | Energy saving method, device and system for network communication equipment |
| CN113254299A (en) * | 2020-02-10 | 2021-08-13 | 大讯科技股份有限公司 | Server with vibration sensing function |
| CN113607329B (en) * | 2021-07-13 | 2022-10-18 | 复旦大学 | Pressure sensor signal temperature compensation method and pressure sensor |
| CN114356057A (en) * | 2021-12-30 | 2022-04-15 | 浙江大华技术股份有限公司 | Method, device and equipment for controlling heat dissipation of PCIe card and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6446153B2 (en) * | 1997-03-14 | 2002-09-03 | Intel Corporation | Shared embedded microcontroller interface |
| US6545438B1 (en) * | 2000-03-31 | 2003-04-08 | Ljm Products, Inc. | Cooling module and related control circuits useful therefor incorporating a communication port for receiving digital command signals to control module |
| CN2569190Y (en) * | 2002-09-23 | 2003-08-27 | 华为技术有限公司 | Fan rotary speed intelligent controller for electronic circuit system |
| US6622250B1 (en) * | 1999-12-21 | 2003-09-16 | Intel Corporation | SMBUS over the PCI bus isolation scheme and circuit design |
| CN1477529A (en) * | 2002-08-22 | 2004-02-25 | 联想(北京)有限公司 | Device for obtaining computer hardware information and method |
-
2004
- 2004-09-13 CN CNB2004100608371A patent/CN1299205C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6446153B2 (en) * | 1997-03-14 | 2002-09-03 | Intel Corporation | Shared embedded microcontroller interface |
| US6622250B1 (en) * | 1999-12-21 | 2003-09-16 | Intel Corporation | SMBUS over the PCI bus isolation scheme and circuit design |
| US6545438B1 (en) * | 2000-03-31 | 2003-04-08 | Ljm Products, Inc. | Cooling module and related control circuits useful therefor incorporating a communication port for receiving digital command signals to control module |
| CN1477529A (en) * | 2002-08-22 | 2004-02-25 | 联想(北京)有限公司 | Device for obtaining computer hardware information and method |
| CN2569190Y (en) * | 2002-09-23 | 2003-08-27 | 华为技术有限公司 | Fan rotary speed intelligent controller for electronic circuit system |
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