CN110501093A - Active 1-wire temperature sensor system, method and medium - Google Patents
Active 1-wire temperature sensor system, method and medium Download PDFInfo
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- CN110501093A CN110501093A CN201910668340.4A CN201910668340A CN110501093A CN 110501093 A CN110501093 A CN 110501093A CN 201910668340 A CN201910668340 A CN 201910668340A CN 110501093 A CN110501093 A CN 110501093A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2219/00—Thermometers with dedicated analog to digital converters
Abstract
The present invention provides a kind of active 1-wire temperature sensor system, method and media, it include: temperature conversion module: by analog voltage signal caused by temperature change, by amplifier and comparator transition at digital signal streams, digital circuit filters out high-frequency signal noise using filter circuit, then obtains the digital value of temperature；Single bus interface module: ROM order and command function on identification monobus；Register and control module: controlling the frequency of the automatic conversion of temperature conversion module, enables Busy, register to be used to indicate whether chip temperature is in temperature transition state.Monobus temperature system reads temperature and needs to wait before solving the problems, such as.Waiting temperature converts after i.e. system sends temperature transition order, then could send read register order and read temperature.Meanwhile the temperature transition of dispersion, it reduces chip on monobus and the concentration of charge is consumed.
Description
Technical field
The present invention relates to electronic technology fields, and in particular, to active 1-wire temperature sensor system, method and Jie
Matter.
Background technique
In the system composed by common unibus equipment, all equipment is in Passive Mode, and system does not have
The order of host is received, the temperature in environment would not be monitored automatically, thus the limitation applied with certain system: no
The purpose of energy intellectual monitoring environment, needs the intervention of superior system.Compare in the unibus equipment quantity of unibus system access
When more, while when sending temperature transition, while temperature transition occurs, concentrates the charge in consumption system.Not only it will affect
The influence of the precision of temperature in system, and be possible to will cause end chip and cause temperature transition because lacking charge supply due to
The case where omission.
Active 1-wire temperature sensor of the invention power on after technique manufacture due to, there are one for oscillator
Determine distribution character, after system brings into operation, temperature transition will occur in an orderly manner, specific sequence view Power On Reset electricity
Threshold value is pressed to determine, to solve the problems in the time collection that temperature transition occurs for each sensor.Overall charge consumption also becomes
In uniform, the temperature accuracy of system is improved.
Summary of the invention
For consumption of the temperature Centralized conversion to charge in unibus system in the prior art big disadvantage and temperature
Acquisition needs the waiting time, and the object of the present invention is to provide a kind of active 1-wire temperature sensor system, method and media.
A kind of active 1-wire temperature sensor system provided according to the present invention characterized by comprising
Temperature conversion module: by analog voltage signal caused by temperature change, by amplifier and comparator transition at
Digital signal streams, digital circuit filter out high-frequency signal noise using filter circuit, then obtain the digital value of temperature；
Single bus interface module: ROM order and command function on identification monobus；
Register and control module: controlling the frequency of the automatic conversion of temperature conversion module, enables Busy, register to be used for
Whether instruction chip temperature is in temperature transition state.
Temperature latch module: the digital value of the temperature currently calculated exported temperature conversion module according to function life into
Row latches, and the digital value of output temperature.
Preferably, the single bus interface module:
The ROM order include: ReadROMID order, MatchROMID order, SearchROMID order,
SearchAlarmROMID order and Skip order；
The command function includes: to write register command, read register command, copy register command, readback memory
Order and reading power supply powering mode order.
Preferably, the single bus interface module:
If recognizing reading register command, generates latching action signal TLock and give temperature latch module；
If recognizing ReadROMID order, 64 internal ROMID are replied；
If recognizing MatchROMID order, the ROMID of the received ROMID and therein on monobus are compared:
If it is inconsistent, chip will enter unselected state；Otherwise, then enter and choose state of activation, prepare to receive subsequent function
It can order；
If recognizing Search Alarm ROMID order, if the temperature of chip interior is greater than represented by TH register
Temperature or less than temperature represented by TL register then replys internal ROMID；
If recognizing Skip order, it is directly entered and receives the command function stage；
If recognizing Search ROMID order, the value of all chips transmission bit0 on monobus, followed by bit0
Converse value, then host is sent in the bit0 value read on monobus, if the value for the bit0 that the chip on single line receives and
Oneself send bit0 value be it is identical, then enter bit1 comparison procedure, if 64 bit be all it is matched, enter choosing
Middle state of activation prepares to receive subsequent command function；If being matched to different values, enter unselected state.
Preferably, the command function:
The function of writing register command is that value is write into TH register and TL register, and the TH register is temperature high limit
The register of value, TL register are the register of temperature lower limit value, TH register and TL register for Alarm function to be arranged；
The function of copying register command is to write the value of TH and TL register in nonvolatile memory；
The function of readback memory command is by value corresponding with TH and TL in non-volatile internal memory, readback to TH and TL register
In；
It is power supply power supply or parasitic power supply that the function of reading power supply powering mode order, which is reading chip,.
Preferably, the temperature latch module:
The latching action signal TLock for receiving single bus interface module, by currently calculating for temperature conversion module output
The digital value of temperature be latched into temperature latch module, the digital value of output temperature.
A kind of active 1-wire temperature sensor method provided according to the present invention, comprising:
Temperature transition step: by analog voltage signal caused by temperature change, by amplifier and comparator transition at
Digital signal streams, digital circuit filter out high-frequency signal noise using filter circuit, then obtain the digital value of temperature；
Single bus interface step: ROM order and command function on identification monobus；
Register and rate-determining steps: the frequency of the automatic conversion of control temperature transition step enables Busy, register to be used for
Whether instruction chip temperature is in temperature transition state.
Temperature latching step: the digital value of the temperature currently calculated exported temperature transition step according to function life into
Row latches, and the digital value of output temperature.
Preferably, the single bus interface step:
The ROM order include: ReadROMID order, MatchROMID order, SearchROMID order,
SearchAlarmROMID order and Skip order；
The command function includes: to write register command, read register command, copy register command, readback memory
Order and reading power supply powering mode order；
If recognizing reading register command, generates and export latching action signal TLock；
If recognizing ReadROMID order, 64 internal ROMID are replied；
If recognizing MatchROMID order, the ROMID of the received ROMID and therein on monobus are compared:
If it is inconsistent, chip will enter unselected state；Otherwise, then enter and choose state of activation, prepare to receive subsequent function
It can order；
If recognizing Search Alarm ROMID order, if the temperature of chip interior is greater than represented by TH register
Temperature or less than temperature represented by TL register then replys internal ROMID；
If recognizing Skip order, it is directly entered and receives the command function stage；
If recognizing Search ROMID order, the value of all chips transmission bit0 on monobus, followed by bit0
Converse value, then host is sent in the bit0 value read on monobus, if the value for the bit0 that the chip on single line receives and
Oneself send bit0 value be it is identical, then enter bit1 comparison procedure, if 64 bit be all it is matched, enter choosing
Middle state of activation prepares to receive subsequent command function；If being matched to different values, enter unselected state.
Preferably, the command function:
The function of writing register command is that value is write into TH register and TL register, and the TH register is temperature high limit
The register of value, TL register are the register of temperature lower limit value, TH register and TL register for Alarm function to be arranged；
The function of copying register command is to write the value of TH and TL register in nonvolatile memory；
The function of readback memory command is by value corresponding with TH and TL in non-volatile internal memory, readback to TH and TL register
In；
It is power supply power supply or parasitic power supply that the function of reading power supply powering mode order, which is reading chip,.
Preferably, the temperature latching step:
Latching action signal TLock based on the received, the number for the temperature currently calculated that temperature transition step is exported
Word value latches, the digital value of output temperature.
A kind of computer readable storage medium for being stored with computer program provided according to the present invention, which is characterized in that
Described in any item active 1-wire temperature sensor methods among the above are realized when the computer program is executed by processor
The step of.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention real-time and accurately provides temperature, without waiting for the order of temperature transition order, automatically updates temperature value.
2, the present invention has dispersed consumption of the temperature transition to charge.
3, the present invention also simplifies the difficulty of software programming simultaneously, reduces consumption of the software to resource.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is active 1-wire temperature sensor structural schematic diagram provided by the invention.
Fig. 2 is that unibus system provided by the invention reads temperature information flow diagram.
Fig. 3 is the schematic network structure that active unibus system provided by the invention is constituted.
Fig. 4 is the ROM order flow diagram of active monobus chip temperature provided by the invention.
Fig. 5 is the Function order flow diagram of active monobus chip temperature provided by the invention.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
A kind of active 1-wire temperature sensor system provided according to the present invention characterized by comprising
Temperature conversion module: by analog voltage signal caused by temperature change, by amplifier and comparator transition at
Digital signal streams, digital circuit filter out high-frequency signal noise using filter circuit, then obtain the digital value of temperature；
Single bus interface module: ROM order and command function on identification monobus；
It further, further include the ROMID marker of 64 bits: for guaranteeing the uniqueness of product, mainly by 3 part groups
At, 8 product numbers, 48 unique encodings and 8 cyclic redundancy checks；
Register and control module: controlling the frequency of the automatic conversion of temperature conversion module, enables Busy, register to be used for
Whether instruction chip temperature is in temperature transition state.
Temperature latch module: the digital value of the temperature currently calculated exported temperature conversion module according to function life into
Row latches, and the digital value of output temperature.
Specifically, the single bus interface module:
The ROM order include: ReadROMID order, MatchROMID order, SearchROMID order,
SearchAlarmROMID order and Skip order；
The command function includes: to write register command, read register command, copy register command, readback memory
Order and reading power supply powering mode order.
Specifically, the single bus interface module:
If recognizing reading register command, generates latching action signal TLock and give temperature latch module；
If recognizing ReadROMID order, 64 internal ROMID are replied；
If recognizing MatchROMID order, the ROMID of the received ROMID and therein on monobus are compared:
If it is inconsistent, chip will enter unselected state；Otherwise, then enter and choose state of activation, prepare to receive subsequent function
It can order；
If recognizing Search Alarm ROMID order, if the temperature of chip interior is greater than represented by TH register
Temperature or less than temperature represented by TL register then replys internal ROMID；
If recognizing Skip order, it is directly entered and receives the command function stage；
If recognizing Search ROMID order, the value of all chips transmission bit0 on monobus, followed by bit0
Converse value, then host is sent in the bit0 value read on monobus, if the value for the bit0 that the chip on monobus receives
With oneself send bit0 value be it is identical, then enter bit1 comparison procedure, if 64 bit be all it is matched, enter
State of activation is chosen, prepares to receive subsequent command function；If being matched to different values, enter unselected state.
Specifically, the command function:
The function of writing register command is that value is write into TH register and TL register, and the TH register is temperature high limit
The register of value, TL register are the register of temperature lower limit value, TH register and TL register for Alarm function to be arranged；
The function of copying register command is to write the value of TH and TL register in nonvolatile memory；
The function of readback memory command is by value corresponding with TH and TL in non-volatile internal memory, readback to TH and TL register
In；
It is power supply power supply or parasitic power supply that the function of reading power supply powering mode order, which is reading chip,.
Specifically, the temperature latch module:
The latching action signal TLock for receiving single bus interface module, by currently calculating for temperature conversion module output
The digital value of temperature be latched into temperature latch module, the digital value of output temperature.
A kind of active 1-wire temperature sensor system provided by the invention, a kind of active that can be given through the invention
The step process of formula 1-wire temperature sensor method is realized.Those skilled in the art can be by a kind of active monobus
Temperature sensor method is interpreted as an a kind of preference of active 1-wire temperature sensor system.
A kind of active 1-wire temperature sensor method provided according to the present invention, comprising:
Temperature transition step: by analog voltage signal caused by temperature change, by amplifier and comparator transition at
Digital signal streams, digital circuit filter out high-frequency signal noise using filter circuit, then obtain the digital value of temperature；
Single bus interface step: ROM order and command function on identification monobus；
Register and rate-determining steps: the frequency of the automatic conversion of control temperature transition step enables Busy, register to be used for
Whether instruction chip temperature is in temperature transition state.
Temperature latching step: the digital value of the temperature currently calculated exported temperature transition step according to function life into
Row latches, and the digital value of output temperature.
Specifically, the single bus interface step:
The ROM order include: ReadROMID order, MatchROMID order, SearchROMID order,
SearchAlarmROMID order and Skip order；
The command function includes: to write register command, read register command, copy register command, readback memory
Order and reading power supply powering mode order；
If recognizing reading register command, generates and export latching action signal TLock；
If recognizing ReadROMID order, 64 internal ROMID are replied；
If recognizing MatchROMID order, the ROMID of the received ROMID and therein on monobus are compared:
If it is inconsistent, chip will enter unselected state；Otherwise, then enter and choose state of activation, prepare to receive subsequent function
It can order；
If recognizing Search Alarm ROMID order, if the temperature of chip interior is greater than represented by TH register
Temperature or less than temperature represented by TL register then replys internal ROMID；
If recognizing Skip order, it is directly entered and receives the command function stage；
If recognizing Search ROMID order, the value of all chips transmission bit0 on monobus, followed by bit0
Converse value, then host is sent in the bit0 value read on monobus, if the value for the bit0 that the chip on monobus receives
With oneself send bit0 value be it is identical, then enter bit1 comparison procedure, if 64 bit be all it is matched, enter
State of activation is chosen, prepares to receive subsequent command function；If being matched to different values, enter unselected state.
Specifically, the command function:
The function of writing register command is that value is write into TH register and TL register, and the TH register is temperature high limit
The register of value, TL register are the register of temperature lower limit value, TH register and TL register for Alarm function to be arranged；
The function of copying register command is to write the value of TH and TL register in nonvolatile memory；
The function of readback memory command is by value corresponding with TH and TL in non-volatile internal memory, readback to TH and TL register
In；
It is power supply power supply or parasitic power supply that the function of reading power supply powering mode order, which is reading chip,.
Specifically, the temperature latching step:
Latching action signal TLock based on the received, the number for the temperature currently calculated that temperature transition step is exported
Word value latches, the digital value of output temperature.
A kind of computer readable storage medium for being stored with computer program provided according to the present invention, which is characterized in that
Described in any item active 1-wire temperature sensor methods among the above are realized when the computer program is executed by processor
The step of.
Below by preference, the present invention is more specifically illustrated.
Preference 1:
A kind of active 1-wire temperature sensor, feature include temperature conversion module, single bus interface module and 64
The ROMID marker of bit, register and control module, temperature latch module are constituted.As shown in Figure 1, master provided by the invention
Dynamic formula 1-wire temperature sensor structural schematic diagram.
Temperature conversion module, for being turned by amplifier and comparator by analog voltage signal caused by temperature change
Become digital signal streams, digital circuit filters out high-frequency signal noise using filter circuit, then obtains the digital value of temperature.
Single bus interface module, for identification the ROM order and Function order on monobus.ROM order includes
ReadROMID order, Match ROMID order, Search ROMID order, Search Alarm ROMID order and Skip life
It enables；Function order includes writing register command, reads the order of register (ReadScratchpad), copy register life
It enables, readback memory command, reads power supply powering mode order.Once recognizing the movement for reading register command, lock will be generated
It deposits action signal TLock and gives temperature latch module.If it is ReadROM order, module is by 64 ROMID inside replying；
If it is MatchROM order, module will compare the ROMID of the received ROMID on monobus and therein, if different
It causes, then chip will enter dormant state, otherwise enters state of activation.
The ROMID marker of 64 bits is mainly made of 3 parts for guaranteeing the uniqueness of product, and 8 products are compiled
Number, 48 unique encodings and 8 cyclic redundancy checks.
Register and control module, comprising CR [2:0] be used for control temperature conversion module automatic conversion frequency and
Busy register is used to indicate whether chip temperature is in temperature transition state.
Temperature latch module, for receiving the latching action signal TLock of single bus interface module, by temperature conversion module
The temperature of output currently calculated is latched into temperature latch module, so that current ReadScratchpad command function exports temperature
Angle value.It may insure that user's temperature value that gap is read at any time is all with primary temperature value.
The active 1-wire temperature sensor register and control module, it is characterized in that configuration (Config) deposit
Contain bit in device:
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Busy_Status | CR[2] | CR[1] | CR[0] | RSV | RSV | RSV | RSV |
Busy_Status is to describe whether this sensor is in temperature transition state, and 1 indicates just in temperature transition；0 indicates
Not in temperature transition.
The time interval of the adjacent temperature transition twice of description of CR register, is not simple multiple proportion.
| CR[2:0] | Time interval (ms) |
| 3’b000 | 302400 |
| 3’b001 | 43200 |
| 3’b010 | 7200 |
| 3’b011 | 1440 |
| 3’b100 | 360 |
| 3’b101 | 120 |
| 3’b110 | 60 |
| 3’b111 | 30 |
The single bus interface module can identify communication command format: reset command (communication
Reset command), then ROM order (ROM command), followed by command function (Function command).
The temperature latches interface module, it is characterised in that sensor has received read register (Read
Scratchpad after) ordering, the value of current temperature register can be latched into corresponding temperature latch, for list
The subsequent reading of bus.This avoid the mistakes of prolonged asynchronous communication bring temperature to read.
Preference 2:
It as shown in Fig. 3, is the unibus system network for thering are 8 active 1-wire temperature sensors to constitute.Each temperature
Degree sensor has the ROMID of a uniqueness and different 64 bit, such as 64 ' h2812_EF90_777A_0012,64
‘h2812_EF90_777A_449C,64‘h2812_EF90_777A_8456,64‘h2812_EF90_777A_33E7,64
‘h2812_EF90_777A_4241,64‘h2812_EF90_777A_5401,64‘h2812_EF90_777A_9AD4,64
‘h2812_EF90_777A_EED4.The end D of all temperature sensors is connected together by red line, is connected to host
Positive (+) port, the end G of all temperature sensors are connected together by the line of black, are connected to cathode (-) port of host.
The corresponding rule such as Fig. 4 and Fig. 5 of specific ROM order and Function order
After host powers on, with certain period temperature transition occurs for temperature sensor in an orderly manner.Host is to active
The order that Search ROMID is sent in the system of monobus, may search for 64 bit of temperature sensor of carry on monobus
ROMID and number.
Host directly reads the temperature of temperature sensor by the sequence of such as attached drawing 2, without sending temperature transition order
When with the regular hour is waited, temperature is read.
In the description of the present application, it is to be understood that term " on ", "front", "rear", "left", "right", " is erected at "lower"
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on the figure or position
Relationship is set, description the application is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
It, completely can be by the way that method and step be carried out programming in logic come so that provided by the invention other than system, device and its modules
System, device and its modules are declined with logic gate, switch, specific integrated circuit, programmable logic controller (PLC) and insertion
The form of controller etc. realizes identical program.So system provided by the invention, device and its modules may be considered that
It is a kind of hardware component, and the knot that the module for realizing various programs for including in it can also be considered as in hardware component
Structure；It can also will be considered as realizing the module of various functions either the software program of implementation method can be Hardware Subdivision again
Structure in part.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of active 1-wire temperature sensor system characterized by comprising
Temperature conversion module: by analog voltage signal caused by temperature change, by amplifier and comparator transition at number
Signal stream, digital circuit filter out high-frequency signal noise using filter circuit, then obtain the digital value of temperature；
Single bus interface module: ROM order and command function on identification monobus；
Register and control module: controlling the frequency of the automatic conversion of temperature conversion module, enables Busy, register to be used to indicate
Whether chip temperature is in temperature transition state.
Temperature latch module: it is ordered according to function and locks the digital value for the temperature currently calculated that temperature conversion module exports
It deposits, and the digital value of output temperature.
2. active 1-wire temperature sensor system according to claim 1, which is characterized in that the single bus interface
Module:
The ROM order include: ReadROMID order, MatchROMID order, SearchROMID order,
SearchAlarmROMID order and Skip order；
The command function includes: to write register command, read register command, copy register command, readback memory command
And read power supply powering mode order.
3. active 1-wire temperature sensor system according to claim 2, which is characterized in that the single bus interface
Module:
If recognizing reading register command, generates latching action signal TLock and give temperature latch module；
If recognizing ReadROMID order, 64 internal ROMID are replied；
If recognizing MatchROMID order, the ROMID of the received ROMID and therein on monobus are compared: if
Inconsistent, then chip will enter unselected state；Otherwise, then enter and choose state of activation, prepare to receive subsequent function life
It enables；
If recognizing Search Alarm ROMID order, if the temperature of chip interior is greater than temperature represented by TH register
Or less than temperature represented by TL register, then internal ROMID is replied；
If recognizing Skip order, it is directly entered and receives the command function stage；
If recognizing Search ROMID order, all chips send the value of bit0, followed by the converse value of bit0 on monobus,
Then host is sent in the bit0 value read on monobus, if the value for the bit0 that the chip on single line receives and oneself hair
The bit0 value sent be it is identical, then enter bit1 comparison procedure, if 64 bit be all it is matched, enter choose activation
State prepares to receive subsequent command function；If being matched to different values, enter unselected state.
4. active 1-wire temperature sensor system according to claim 3, which is characterized in that the command function:
The function of writing register command is that value is write into TH register and TL register, and the TH register is temperature ceiling value
Register, TL register are the register of temperature lower limit value, TH register and TL register for Alarm function to be arranged；
The function of copying register command is to write the value of TH and TL register in nonvolatile memory；
The function of readback memory command is by value corresponding with TH and TL in non-volatile internal memory, and readback is into TH and TL register；
It is power supply power supply or parasitic power supply that the function of reading power supply powering mode order, which is reading chip,.
5. active 1-wire temperature sensor system according to claim 4, which is characterized in that the temperature latches mould
Block:
The latching action signal TLock for receiving single bus interface module, the temperature currently calculated that temperature conversion module is exported
The digital value of degree is latched into temperature latch module, the digital value of output temperature.
6. a kind of active 1-wire temperature sensor method characterized by comprising
Temperature transition step: by analog voltage signal caused by temperature change, by amplifier and comparator transition at number
Signal stream, digital circuit filter out high-frequency signal noise using filter circuit, then obtain the digital value of temperature；
Single bus interface step: ROM order and command function on identification monobus；
Register and rate-determining steps: the frequency of the automatic conversion of control temperature transition step enables Busy, register to be used to indicate
Whether chip temperature is in temperature transition state.
Temperature latching step: it is ordered according to function and locks the digital value for the temperature currently calculated that temperature transition step exports
It deposits, and the digital value of output temperature.
7. active 1-wire temperature sensor method according to claim 6, which is characterized in that the single bus interface
Step:
The ROM order include: ReadROMID order, MatchROMID order, SearchROMID order,
SearchAlarmROMID order and Skip order；
The command function includes: to write register command, read register command, copy register command, readback memory command
And read power supply powering mode order；
If recognizing reading register command, generates and export latching action signal TLock；
If recognizing ReadROMID order, 64 internal ROMID are replied；
If recognizing MatchROMID order, the ROMID of the received ROMID and therein on monobus are compared: if
Inconsistent, then chip will enter unselected state；Otherwise, then enter and choose state of activation, prepare to receive subsequent function life
It enables；
If recognizing Search Alarm ROMID order, if the temperature of chip interior is greater than temperature represented by TH register
Or less than temperature represented by TL register, then internal ROMID is replied；
If recognizing Skip order, it is directly entered and receives the command function stage；
If recognizing Search ROMID order, all chips send the value of bit0, followed by the converse value of bit0 on monobus,
Then host is sent in the bit0 value read on monobus, if the value for the bit0 that the chip on single line receives and oneself hair
The bit0 value sent be it is identical, then enter bit1 comparison procedure, if 64 bit be all it is matched, enter choose activation
State prepares to receive subsequent command function；If being matched to different values, enter unselected state.
8. active 1-wire temperature sensor method according to claim 7, which is characterized in that the command function:
The function of writing register command is that value is write into TH register and TL register, and the TH register is temperature ceiling value
Register, TL register are the register of temperature lower limit value, TH register and TL register for Alarm function to be arranged；
The function of copying register command is to write the value of TH and TL register in nonvolatile memory；
The function of readback memory command is by value corresponding with TH and TL in non-volatile internal memory, and readback is into TH and TL register；
It is power supply power supply or parasitic power supply that the function of reading power supply powering mode order, which is reading chip,.
9. active 1-wire temperature sensor method according to claim 8, which is characterized in that the temperature latches step
It is rapid:
Latching action signal TLock based on the received, the digital value for the temperature currently calculated that temperature transition step is exported
It latches, the digital value of output temperature.
10. a kind of computer readable storage medium for being stored with computer program, which is characterized in that the computer program is located
Manage the step of active 1-wire temperature sensor method described in any one of claim 6 to 9 is realized when device executes.
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| CN201910668340.4A CN110501093A (en) | 2019-07-23 | 2019-07-23 | Active 1-wire temperature sensor system, method and medium |
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| CN201910668340.4A CN110501093A (en) | 2019-07-23 | 2019-07-23 | Active 1-wire temperature sensor system, method and medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111476991A (en) * | 2020-03-06 | 2020-07-31 | 上海申矽凌微电子科技有限公司 | Double-point temperature measurement system and method suitable for master-slave single bus communication protocol |
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