CN217060963U - Intelligent instrument firmware upgrading device and intelligent instrument - Google Patents
Intelligent instrument firmware upgrading device and intelligent instrument Download PDFInfo
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- CN217060963U CN217060963U CN202220674035.3U CN202220674035U CN217060963U CN 217060963 U CN217060963 U CN 217060963U CN 202220674035 U CN202220674035 U CN 202220674035U CN 217060963 U CN217060963 U CN 217060963U
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Abstract
The utility model discloses an intelligent instrument firmware upgrading device, include: the intelligent instrument firmware upgrading circuit at least comprises a power supply interface, a power supply circuit and a first analog switch, wherein the power supply interface is connected with a direct-current power supply, the power supply circuit is connected with the intelligent instrument singlechip through the first analog switch, and the first analog switch is controlled through the intelligent instrument singlechip so as to control the working state of the intelligent instrument; the intelligent instrument firmware upgrading tool circuit at least comprises an upgrading interface and two analog switches, and the two analog switches are connected with the firmware upgrading tool singlechip; when the firmware of the intelligent instrument needs to be upgraded, the firmware upgrading tool circuit of the intelligent instrument is connected with the firmware upgrading circuit of the intelligent instrument, and the two analog switches are controlled by the single chip microcomputer of the firmware upgrading tool so as to control the working state of the firmware upgrading tool circuit of the intelligent instrument. The utility model discloses need not to increase extra communication interface, utilize power supply interface to realize the firmware upgrade of intelligent instrument.
Description
Technical Field
The utility model relates to an intelligent instrument circuit technical field, concretely relates to intelligent instrument firmware upgrading device and intelligent instrument.
Background
Along with the wide application of intelligent instruments such as intelligent water meters, intelligent gas meters, the function of intelligent instrument is more and more, and the demand is constantly changing, and this type of intelligent instrument's service life is longer again, and life is as long as 6 ~ 10 years usually. In practical applications, the intelligent meters installed for many years often have insufficient functions or do not conform to the existing policies, and the service life of the intelligent meters is not reached, so that if the intelligent meters are replaced by new meters, the cost is increased greatly, and if the intelligent meters are not replaced, great inconvenience is brought to the use.
If the intelligent instrument has the firmware upgrading function, the modification and the function expansion of the functions of the intelligent instrument can be conveniently realized, the latest function requirement or function change can be met on the premise that the intelligent instrument in application is not replaced, the cost input is reduced to the maximum extent, and the maximum value of the product is exerted. The normal firmware upgrading needs to be realized by adopting a special programming interface, needs to be dismounted and uses a special upgrading tool, and has higher realization difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome the not enough of above technique, provide an intelligent instrument firmware upgrading device and intelligent instrument.
The utility model discloses need not increase extra communication interface, utilize power supply interface (battery or external power source) to realize intelligent instrument's firmware upgrading function.
The utility model redesigns the firmware upgrading circuit of the intelligent instrument, so that the upgrading circuit has the dual functions of power supply and communication, when the power supply interface of the firmware upgrading circuit of the intelligent instrument is connected with a power supply (a battery or an external power supply) for use, the circuit has a normal power supply function and provides power supply for the internal circuit of the intelligent instrument; when the firmware of the intelligent instrument needs to be upgraded, the power supply interface of the instrument is disconnected with a power supply (a battery or an external power supply) and is connected with the firmware upgrading tool circuit of the intelligent instrument, and at the moment, the power supply interface of the firmware upgrading circuit of the intelligent instrument provides power supply for the internal circuit and simultaneously provides a communication function for upgrading the firmware, so that the firmware upgrading of the intelligent instrument is realized.
The utility model discloses overcome the technical scheme that its technical problem adopted and be:
a smart meter firmware upgrade device, comprising:
the intelligent instrument firmware upgrading circuit is configured for power supply and communication, and at least comprises a power supply interface, a power supply circuit and a first analog switch, wherein the power supply interface is connected with a direct-current power supply, the power supply circuit is connected with an intelligent instrument single chip microcomputer through the first analog switch, and the first analog switch is controlled through the intelligent instrument single chip microcomputer so as to control the working state of an intelligent instrument;
the intelligent instrument firmware upgrading tool circuit is configured to be used for upgrading the firmware of the intelligent instrument, and at least comprises an upgrading interface and two analog switches, wherein the two analog switches are connected with the firmware upgrading tool singlechip; when the firmware of the intelligent instrument needs to be upgraded, the intelligent instrument firmware upgrading tool circuit is connected with the power supply interface of the intelligent instrument firmware upgrading circuit through the upgrading interface, and the firmware upgrading tool singlechip controls the two analog switches so as to control the working state of the intelligent instrument firmware upgrading tool circuit.
Further, the power supply interface is J1 for accessing an external power supply, the power supply circuit includes a low-voltage drop diode D1 and a capacitor C1, the first analog switch is U1, the first analog switch U1 includes 6 pins including pin 1, pin 2, pin 3, pin 4, pin 5 and pin 6, and the smart meter firmware upgrade circuit further includes a current-limiting resistor R2; the anode of the low-voltage-drop diode D1, the anode of the power supply interface J1 and one end of a current-limiting resistor R2 are connected with an external power supply, the cathode of the low-voltage-drop diode D1 is connected with the anode of a capacitor C1, the cathode of the low-voltage-drop diode D1 and the anode of a capacitor C1 are both connected with a direct-current power supply VCC, the other end of the current-limiting resistor R2 is connected with a pin 4 of a first analog switch U1, a pin 6 of the first analog switch U1 is connected with a transmission/reception control IO port of the intelligent instrument singlechip, a pin 1 of the first analog switch U1 is connected with a transmission interface of the intelligent instrument singlechip, a pin 3 of a first analog switch U1 is connected with a reception interface of the intelligent instrument singlechip, a pin 5 of the first analog switch U1 is connected with the direct-current power supply VCC, and the cathode of the power supply interface J1, the cathode of the capacitor C1 and a pin 2 of the first analog switch U1 are all grounded.
Furthermore, the intelligent meter firmware upgrading circuit further comprises a pull-up resistor R1 and a pull-up resistor R3, wherein the pull-up resistor R1 is connected between the direct current power supply VCC and the current-limiting resistor R2, and the pull-up resistor R3 is connected between the pin 3 of the first analog switch U1 and the pin 5 of the first analog switch U1.
Further, the upgrade interface is J11, the two analog switches are respectively a second analog switch U11 and a third analog switch U12, the second analog switch U11 and the third analog switch U12 respectively include 6 pins including pin 1, pin 2, pin 3, pin 4, pin 5 and pin 6, pin 4 of the second analog switch U11 and pin 4 of the third analog switch U12 are both connected to the positive electrode of the upgrade interface J11, pin 6 of the second analog switch U11 and pin 6 of the third analog switch U12 are both connected to the IO port of the firmware upgrade tool single-chip microcomputer, pin 1 of the second analog switch U11 is connected to the transmission interface of the firmware upgrade tool single-chip microcomputer, pin 3 of the second analog switch U11 is connected to the reception interface of the firmware upgrade tool single-chip microcomputer, pin 5 of the second analog switch U11 and pin 3 and pin 5 of the third analog switch U12 are both connected to the dc power supply VCC, the cathode of the upgrade interface J11, pin 2 of the second analog switch U11, and pin 2 of the third analog switch U12 are all grounded.
Furthermore, the intelligent meter firmware upgrading tool circuit further comprises a pull-up resistor R42, wherein the pull-up resistor R42 is connected between the pin 3 of the second analog switch U11 and the direct current power supply VCC.
The utility model also discloses an intelligent instrument, including the intelligent instrument body, still include as above-mentioned intelligent instrument firmware upgrading device, intelligent instrument firmware upgrading device sets up in the intelligent instrument body.
The utility model has the advantages that:
1. the utility model discloses in, the intelligent instrument realizes the firmware upgrading function under the condition that does not increase external circuit interface, can newly increase and modify the function of intelligent instrument, or restores procedure BUG, improves the practicality and the maintainability of intelligent instrument.
2. The power supply interface of the intelligent instrument firmware upgrading circuit realizes the power supply function and the communication function of an internal circuit, the two-way communication function with the intelligent instrument firmware upgrading tool circuit can be realized while power is supplied, mutual data interaction is realized, and the intelligent instrument can load the latest firmware file through the power supply interface and upgrade the firmware.
3. The function of upgrading the firmware through the power supply interface of the intelligent instrument firmware upgrading circuit can be realized only by adding a small number of circuits to the internal circuit of the intelligent instrument, and the intelligent instrument firmware upgrading circuit is low in cost, stable and reliable.
4. When a power supply (a battery or an external power supply) is used for supplying power, the added circuit does not influence the normal work of the intelligent instrument, and when the intelligent instrument firmware upgrading tool circuit is used, the new version firmware can be downloaded to the intelligent instrument while the power is supplied to the intelligent instrument, so that the firmware upgrading function is realized.
5. The power line is used for realizing the single-wire half-duplex data communication function, and the stability and the reliability of communication are ensured.
Drawings
Fig. 1 is a circuit diagram of an intelligent meter firmware upgrade circuit according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a circuit of the firmware upgrading tool for an intelligent instrument according to an embodiment of the present invention.
Detailed Description
In order to facilitate better understanding of the present invention for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, which are given by way of illustration only and thus do not limit the scope of the present invention.
An intelligent instrument firmware upgrading device described in this embodiment is shown in fig. 1 and fig. 2, and includes an intelligent instrument firmware upgrading circuit and an intelligent instrument firmware upgrading tool circuit for assisting the intelligent instrument firmware upgrading circuit.
The intelligent instrument firmware upgrading circuit is configured to be used for power supply and communication, and at least comprises a power supply interface, a power supply circuit and a first analog switch, wherein the power supply interface is connected with a direct-current power supply, the power supply circuit is connected with the intelligent instrument single chip microcomputer through the first analog switch, and the intelligent instrument single chip microcomputer is used for controlling the working state of the intelligent instrument through the first analog switch.
Specifically, the power supply interface is J1 and is used for supplying the external power source to insert, power supply circuit includes low dropout diode D1 and electric capacity C1, first analog switch is U1, and first analog switch U1 includes pin 1, pin 2, pin 3, pin 4, pin 5 and 6 total 6 pins of pin, smart meter firmware upgrading circuit still includes current-limiting resistance R2. The positive pole of the low-dropout diode D1, the positive pole of the power supply interface J1 and one end of a current-limiting resistor R2 are connected with an external power supply, the negative pole of the low-dropout diode D1 is connected with the positive pole of a capacitor C1, the negative pole of the low-dropout diode D1 and the positive pole of a capacitor C1 are connected with a direct-current power supply VCC, the other end of the current-limiting resistor R2 is connected with a pin 4 of a first analog switch U1, a pin 6 of the first analog switch U1 is connected with a transmitting/receiving control IO port of an intelligent instrument singlechip, a pin 1 of the first analog switch U1 is connected with a transmitting interface of the intelligent instrument singlechip, a pin 3 of a first analog switch U1 is connected with a receiving interface of the intelligent instrument singlechip, a pin 5 of the first analog switch U1 is connected with the direct-current power supply VCC, and the negative pole of the power supply interface J1, the negative pole of the capacitor C1 and a pin 2 of the first analog switch U1 are all grounded. Preferably, the intelligent meter firmware upgrading circuit further comprises a pull-up resistor R1 and a pull-up resistor R3, the pull-up resistor R1 is connected between the dc power source VCC and the current-limiting resistor R2, the pull-up resistor R3 is connected between the pin 3 of the first analog switch U1 and the pin 5 of the first analog switch U1, and the pull-up resistor R1 and the pull-up resistor R3 are used for stabilizing the initial state of the port for the communication port.
In the intelligent instrument firmware upgrading circuit, an external power supply is accessed from a power supply interface J1, the power supply adopts a direct-current power supply, and a pin 1 of a power supply interface J1 is a positive electrode and a pin 2 is a negative electrode. The low-voltage-drop diode D1 and the capacitor C1 form a power supply circuit of the intelligent instrument firmware upgrading circuit, and the anode of the power supply charges the capacitor C1 after passing through the low-voltage-drop diode D1 and simultaneously supplies power to the internal circuit of the intelligent instrument. The positive pole of the power supply is connected with a communication interface of the intelligent instrument singlechip after passing through a current-limiting resistor R2 and a first analog switch U1, when a pin 6(SEL _ MCU) of the first analog switch U1 is at a low level, a pin 4(SDIO) of the first analog switch U1 is connected with a pin 3 of the first analog switch U1, namely is connected with a receiving interface RXD _ MCU of the intelligent instrument singlechip, and the intelligent instrument is in a data receiving state; when a pin 6(SEL _ MCU) of the first analog switch U1 is in a high level, a pin 4(SDIO) of the first analog switch U1 is connected with a pin 1 of the first analog switch U1, namely is connected with a transmitting interface TXD _ MCU of the intelligent instrument singlechip, and at the moment, the intelligent instrument is in a data transmitting state, so that single-wire half-duplex communication is realized; and switching to a receiving state after the data transmission is finished.
The intelligent instrument firmware upgrading tool circuit is configured to be used for upgrading the firmware of the intelligent instrument and at least comprises an upgrading interface and two analog switches, and the two analog switches are connected with the firmware upgrading tool singlechip; when the firmware of the intelligent instrument needs to be upgraded, the intelligent instrument firmware upgrading tool circuit is connected with the power supply interface of the intelligent instrument firmware upgrading circuit through the upgrading interface, and the firmware upgrading tool singlechip controls the two analog switches so as to control the working state of the intelligent instrument firmware upgrading tool circuit.
Specifically, the upgrade interface is J11, the two analog switches are a second analog switch U11 and a third analog switch U12, and the second analog switch U11 and the third analog switch U12 respectively include 6 pins, that is, pin 1, pin 2, pin 3, pin 4, pin 5, and pin 6. Pin 4 of the second analog switch U11 and pin 4 of the third analog switch U12 are both connected with the anode of an upgrade interface J11, pin 6 of the second analog switch U11 and pin 6 of the third analog switch U12 are both connected with the IO port of a firmware upgrade tool single-chip microcomputer, pin 1 of the second analog switch U11 is connected with the transmission interface of the firmware upgrade tool single-chip microcomputer, pin 3 of the second analog switch U11 is connected with the reception interface of the firmware upgrade tool single-chip microcomputer, pin 5 of the second analog switch U11 and pin 3 and pin 5 of the third analog switch U12 are both connected with a direct current power supply VCC, pin 1 of the third analog switch U12 is vacant, and the cathode of the upgrade interface J11, pin 2 of the second analog switch U11 and pin 2 of the third analog switch U12 are all grounded. Preferably, the smart meter firmware upgrade tool circuit further includes a pull-up resistor R42, and the pull-up resistor R42 is connected between the pin 3 of the second analog switch U11 and the dc power source VCC.
In the intelligent instrument firmware upgrading tool circuit, a pin 1 of an upgrading interface J11 is an anode/communication data line, a pin 2 is a cathode/ground line, and an upgrading interface J11 has two functions of power supply and data communication, so that single-wire half-duplex data communication is realized while power is supplied to an intelligent instrument. The third analog switch U12 controls whether the upgrade interface J11 supplies power to the outside or not through an IO port of the firmware upgrade tool singlechip, and when a pin 6(SEL1_ MCU) of the third analog switch U12 is at a low level, the upgrade interface J11 is connected with a direct current power supply VCC and directly supplies power to the intelligent instrument through the direct current power supply VCC; when the intelligent meter is communicated, a pin 6(SEL1_ MCU) of the third analog switch U12 is in a high level, and the connection between the anode of the upgrade interface J11 and the DC power supply VCC is cut off. When the pin 6(SEL0_ MCU) of the second analog switch U11 is at a low level, the anode of the upgrade interface J11 is connected with the pin 3 of the second analog switch U11 through the pin 4(SDIO) of the second analog switch U11, that is, connected with the receiving interface RXD _ M of the firmware upgrade tool singlechip, and at this time, the intelligent instrument firmware upgrade tool circuit is in a data receiving state or a power supply state; when the pin 6(SEL0_ MCU) of the second analog switch U11 is at a high level, the anode of the upgrade interface J11 is connected with the pin 1 of the second analog switch U11, that is, connected with the transmission interface TXD _ M of the firmware upgrade tool single chip microcomputer, and at this time, the intelligent instrument firmware upgrade tool circuit is in a data transmission state.
When the intelligent instrument firmware upgrading tool circuit is in data communication with the intelligent instrument, the firmware upgrading tool single chip microcomputer must set a pin 6(SEL1_ MCU) of the third analog switch U12 to be in a high level, and the connection between the communication interface of the third analog switch U12 and the power supply is disconnected. When the intelligent instrument firmware upgrading tool circuit performs data communication and data is transmitted to 0, the low-voltage-drop diode D1 of the intelligent instrument firmware upgrading circuit is cut off, and the intelligent instrument is maintained to be powered by the capacitor C1; when the data is sent to 1, the low dropout diode D1 is turned on to charge the capacitor C1.
The state of the positive electrode interface of the upgrading interface of the intelligent instrument firmware upgrading tool circuit is shown in table 1, and the state of the positive electrode interface of the power supply interface of the intelligent instrument firmware upgrading circuit is shown in table 2.
TABLE 1
| Working state | Electrical connection | SEL0_MCU | SEL1_MCU | |
| State of | VCC | 0 | 0 | |
| Transmitting | TXD_M | 1 | 1 | |
| Receiving | RXD_M | 0 | 1 |
TABLE 2
| Working state | Electrical connection | SEL_MCU | |
| State of | VCC | 0 | |
| Transmitting | TXD_MCU | 1 | |
| Receiving | RXD_MCU | 0 |
This embodiment still discloses an intelligent instrument, including intelligent instrument body, still include as above-mentioned intelligent instrument firmware upgrading device, intelligent instrument firmware upgrading device sets up in intelligent instrument body.
The foregoing has described only the basic principles and preferred embodiments of the present invention and numerous changes and modifications may be made by those skilled in the art in light of the above teachings and shall fall within the scope of the present invention.
Claims (6)
1. An intelligent meter firmware upgrade device, comprising:
the intelligent instrument firmware upgrading circuit is configured for power supply and communication, and at least comprises a power supply interface, a power supply circuit and a first analog switch, wherein the power supply interface is connected with a direct-current power supply, the power supply circuit is connected with an intelligent instrument single chip microcomputer through the first analog switch, and the intelligent instrument single chip microcomputer controls the first analog switch so as to control the working state of an intelligent instrument;
the intelligent instrument firmware upgrading tool circuit is configured to be used for upgrading the firmware of the intelligent instrument, and at least comprises an upgrading interface and two analog switches, wherein the two analog switches are connected with the firmware upgrading tool singlechip; when the firmware of the intelligent instrument needs to be upgraded, the intelligent instrument firmware upgrading tool circuit is connected with the power supply interface of the intelligent instrument firmware upgrading circuit through the upgrading interface, and the two analog switches are controlled by the firmware upgrading tool single chip microcomputer so as to control the working state of the intelligent instrument firmware upgrading tool circuit.
2. The intelligent instrument firmware upgrading device of claim 1, wherein the power supply interface is J1 for accessing an external power supply, the power supply circuit comprises a low dropout diode D1 and a capacitor C1, the first analog switch is U1, the first analog switch U1 comprises 6 pins including pin 1, pin 2, pin 3, pin 4, pin 5 and pin 6, and the intelligent instrument firmware upgrading circuit further comprises a current limiting resistor R2; the low-voltage-drop diode D1 positive pole, the power supply interface J1 positive pole and the current-limiting resistor R2 one end all are connected with external power supply, the low-voltage-drop diode D1 negative pole and the electric capacity C1 positive pole are connected and low-voltage-drop diode D1 negative pole and the electric capacity C1 positive pole all are connected with DC power supply VCC, the current-limiting resistor R2 other end is connected with first analog switch U1 pin 4, first analog switch U1 pin 6 is connected with the transmission/reception control IO mouth of intelligent instrument singlechip, first analog switch U1 pin 1 and intelligent instrument singlechip's transmission interface connection, first analog switch U1 pin 3 and intelligent instrument singlechip's receiving interface connection, first analog switch U1 pin 5 and DC power supply VCC connection, the power supply interface J1 negative pole, the electric capacity C1 negative pole and first analog switch U1 pin 2 all ground connection.
3. The intelligent meter firmware upgrading device according to claim 2, wherein the intelligent meter firmware upgrading circuit further comprises a pull-up resistor R1 and a pull-up resistor R3, the pull-up resistor R1 is connected between a direct current power supply VCC and a current limiting resistor R2, and the pull-up resistor R3 is connected between a pin 3 of the first analog switch U1 and a pin 5 of the first analog switch U1.
4. The firmware upgrading device for the intelligent instrument of claim 1, wherein the upgrading interface is J11, the two analog switches are a second analog switch U11 and a third analog switch U12, the second analog switch U11 and the third analog switch U12 respectively comprise 6 pins including pin 1, pin 2, pin 3, pin 4, pin 5 and pin 6, pin 4 of the second analog switch U11 and pin 4 of the third analog switch U12 are both connected with the anode of the upgrading interface J11, pin 6 of the second analog switch U11 and pin 6 of the third analog switch U12 are both connected with the IO port of the firmware upgrading tool singlechip, pin 1 of the second analog switch U11 is connected with the transmission interface of the firmware upgrading tool singlechip, pin 3 of the second analog switch U11 is connected with the reception interface of the firmware upgrading tool, pin 5 of the second analog switch U11 and pin 3 and pin 5 of the third analog switch U12 are both connected with VCC power supply, the cathode of the upgrade interface J11, pin 2 of the second analog switch U11, and pin 2 of the third analog switch U12 are all grounded.
5. The intelligent meter firmware upgrade device according to claim 4, wherein the intelligent meter firmware upgrade tool circuit further comprises a pull-up resistor R42, the pull-up resistor R42 is connected between pin 3 of the second analog switch U11 and the DC power supply VCC.
6. A smart meter comprising a smart meter body, further comprising a smart meter firmware upgrade device according to any one of claims 1 to 5, the smart meter firmware upgrade device being disposed in the smart meter body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220674035.3U CN217060963U (en) | 2022-03-25 | 2022-03-25 | Intelligent instrument firmware upgrading device and intelligent instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220674035.3U CN217060963U (en) | 2022-03-25 | 2022-03-25 | Intelligent instrument firmware upgrading device and intelligent instrument |
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| CN217060963U true CN217060963U (en) | 2022-07-26 |
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| CN202220674035.3U Active CN217060963U (en) | 2022-03-25 | 2022-03-25 | Intelligent instrument firmware upgrading device and intelligent instrument |
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