CN216486423U

CN216486423U - TCU takes external memory ware communication circuit of accuse unit and uses its electric pile that fills

Info

Publication number: CN216486423U
Application number: CN202122781754.3U
Authority: CN
Inventors: 邓永辉; 高科济; 朱明�
Original assignee: Shenzhen Jinqihui Electric Co ltd
Current assignee: Shenzhen Jinqihui Electric Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-05-10
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses an external memory communication circuit of a TCU (train control unit) and a charging pile applying the same, wherein the external memory communication circuit comprises a control module, a man-machine interaction module, a signal processing module, a communication module and an external memory; the control module comprises a first USB bus and a second USB bus, the control module is in communication connection with the human-computer interaction module through the first USB bus, and the control module is in communication connection with the signal processing module through the second USB bus; the signal processing module is connected with the communication module through a third USB bus, and is connected with the external memory through a fourth USB bus; the control module is used for sending a selection signal, and the signal processing module receives the selection signal and switches to a communication channel corresponding to the third USB bus or the fourth USB bus. The communication module is connected when the USB flash disk is not inserted, and the USB flash disk is switched to a USB flash disk communication channel after being inserted, so that intelligent switching is realized; the cost is lower than that of using GL852-MN to expand the USB bus.

Description

TCU takes external memory ware communication circuit of accuse unit and uses its electric pile that fills

Technical Field

The utility model relates to a charging pile, in particular to an external memory communication circuit of a TCU (communication control unit) and a charging pile applying the same.

Background

USB (universal serial bus) is a type of universal serial external bus. First, USB is a "bus" which, unlike a bus internal to a computer (e.g., a PCI bus), a CPU cannot directly access devices connected to USB by accessing memory commands or I/O commands, but indirectly interfaces with devices connected to USB via a "USB controller", and the USB bus exists outside the computer and is therefore referred to as an external bus. Secondly, the USB signal lines are only two in total, and signals on the lines are serial, so that the USB signal lines are 'serial external buses'.

Because the microprocessor mostly adopted by the 'TCU cost control unit' of the direct-current charging pile only supports 2 paths of USB buses, 1 path is used for 4G module communication, and 1 path is used for touch screen communication, no redundant USB bus is used for USB disk download logs, and software upgrading is carried out, so that more USB buses are required for the 'TCU cost control unit' of the direct-current charging pile to be used for the USB disk download logs and software upgrading.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide an external memory communication circuit of a TCU (train control unit) and a charging pile applying the external memory communication circuit.

The utility model is realized by the following technical measures, comprising a control module, a man-machine interaction module, a signal processing module, a communication module and an external memory; the control module comprises a first USB bus and a second USB bus, the control module is in communication connection with the human-computer interaction module through the first USB bus, and the control module is in communication connection with the signal processing module through the second USB bus; the signal processing module is connected with the communication module through a third USB bus, and the signal processing module is connected with the external memory through a fourth USB bus; the control module is used for sending a selection signal, and the signal processing module receives the selection signal and switches to a communication channel corresponding to the third USB bus or the fourth USB bus.

Preferably, the signal processing module comprises a low-power high-speed USB switch with the model of FSUSB30 MUX.

As a preferable mode, the 2 pin and the 8 pin of the high-speed USB switch are connected with the communication module or the external memory; and 3 pins and 7 pins of the high-speed USB switch are connected with the external memory or the communication module.

As a preferable mode, a signal output end of the control module is connected with pin 1 of the high-speed USB switch through a resistor R194; the 9 pins of the high-speed USB switch are grounded; and the control module is connected with the 4 pins and the 6 pins of the high-speed USB switch through a second USB bus.

Preferably, pin 1 of the high-speed USB switch is grounded through a resistor R198; and the pin 1 of the high-speed USB switch is connected with a 3.3V power supply through a resistor R199.

As a preferred mode, the human-computer interaction module is a touch screen.

As a preferable mode, the communication module is a 4G communication module or a 5G communication module.

A charging pile applies an external memory communication circuit of a TCU charge control unit.

The utility model provides an external memory communication circuit of a TCU charge control unit and a charging pile applying the same.A USB bus of a control module is input by a D + pin and a D-pin of a USB switch, the control module outputs a high level or low level S pin and an OE pin to control the switching of a communication channel, when OE is low level and S is high level, D +, D-are conducted with HSD1+, HSD1-, and when OE is low level and S is low level, D +, D-are conducted with HSD2+ and HSD 2-; the USB flash disk can be connected with the communication module when the USB flash disk is not inserted, and the USB flash disk is switched to a USB flash disk communication channel after being inserted, so that intelligent switching is realized; and is less costly than using GL852-MN to extend the USB bus.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a circuit schematic of an embodiment of the present invention;

fig. 3 is a schematic diagram of an internal structure of a signal processing module according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings.

An external memory communication circuit of a TCU cost control unit, referring to fig. 1 to 3, comprises a control module, a man-machine interaction module, a signal processing module, a communication module and an external memory; the control module comprises a first USB bus and a second USB bus, the control module is in communication connection with the man-machine interaction module through the first USB bus, and the control module is in communication connection with the signal processing module through the second USB bus; the signal processing module is connected with the communication module through a third USB bus, and the signal processing module is connected with the external memory through a fourth USB bus; the control module is used for sending a selection signal, and the signal processing module receives the selection signal and switches to a communication channel corresponding to the third USB bus or the fourth USB bus.

The control module is a single chip microcomputer or a microcontroller used by the charging pile; the human-computer interaction module is a touch screen arranged on the charging pile; the communication module is a 4G or 5G communication module; in the present embodiment, the external memory is preferably a usb disk.

Furthermore, the signal processing module comprises a low-power-consumption high-speed USB switch U24 with the model of FSUSB30MUX, and the communication speed reaches 480 Mbps;

in this embodiment, HSD1+ pin (pin 2) and HSD 1-pin (pin 8) of U24 are connected to the communication module; HSD2+ (pin 3) and HSD2- (pin 7) of U24 are connected with a DP line of the external memory, and pin 7 is connected with a DM line of the external memory;

a signal output end of the control module is connected with an S pin (pin 1) of the high-speed USB switch through a resistor R194, and the S pin is selected for input; an OE pin (9 pins) of the high-speed USB switch is an output enabling end and is grounded; the control module is connected with a D + pin (4 pins) and a D-pin (6 pins) of the high-speed USB switch through a USB port of the second USB bus;

the pin 1 of the high-speed USB switch is grounded through a resistor R198 and is connected with a 3.3V power supply through a resistor R199;

the GND pin (pin 5) of the high-speed USB switch is grounded, and the VCC pin (pin 10) is connected with a 3.3V power supply and is grounded and decoupled through a capacitor C237.

The working principle of the communication circuit of the external memory is as follows: the USB bus of the control module is input by a D + pin and a D-pin of the USB switch, the control module outputs a high level or a low level S pin and an OE pin to control the switching of the communication channels, when OE is low level and S is high level, D +, D-and HSD1+, HSD 1-are conducted, when OE is low level and S is low level, D +, D-and HSD2+, HSD 2-are conducted; the USB flash disk can be connected with the communication module when the USB flash disk is not inserted, and the USB flash disk is switched to a USB flash disk communication channel after being inserted, so that intelligent switching is realized; and is less costly than using GL852-MN to extend the USB bus.

The external memory communication circuit of a TCU fee control unit and the charging post using the same are described above for facilitating understanding of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, and simplifications that do not depart from the principle of the present invention shall be equivalent substitutions, and all fall within the protection scope of the present invention.

Claims

1. The communication circuit of the external memory of the TCU fee control unit is characterized by comprising a control module, a man-machine interaction module, a signal processing module, a communication module and an external memory; the control module comprises a first USB bus and a second USB bus, the control module is in communication connection with the human-computer interaction module through the first USB bus, and the control module is in communication connection with the signal processing module through the second USB bus; the signal processing module is connected with the communication module through a third USB bus, and the signal processing module is connected with the external memory through a fourth USB bus; the control module is used for sending a selection signal, and the signal processing module receives the selection signal and switches to a communication channel corresponding to the third USB bus or the fourth USB bus.

2. The external memory communication circuit of a TCU fee control unit of claim 1, wherein the signal processing module comprises a low power high speed USB switch model FSUSB30 MUX.

3. The TCU fee control unit external memory communication circuit of claim 2, wherein pins 2 and 8 of the high speed USB switch are connected to the communication module or the external memory; and 3 pins and 7 pins of the high-speed USB switch are connected with the external memory or the communication module.

4. The TCU fee control unit external memory communication circuit as recited in claim 3, wherein a signal output terminal of the control module is connected to pin 1 of the high speed USB switch via a resistor R194; the 9 pins of the high-speed USB switch are grounded; and the control module is connected with the 4 pins and the 6 pins of the high-speed USB switch through a second USB bus.

5. The TCU fee control unit external memory communication circuit as recited in claim 4, wherein pin 1 of the high speed USB switch is connected to ground via resistor R198; and the pin 1 of the high-speed USB switch is connected with a 3.3V power supply through a resistor R199.

6. The TCU fee control unit external memory communication circuit of any one of claims 1-5, wherein the human-computer interaction module is a touch screen.

7. The TCU fee control unit external memory communication circuit of any one of claims 1-5, wherein the communication module is a 4G communication module or a 5G communication module.

8. A charging post, characterized in that, an external memory communication circuit of a TCU fee control unit according to any one of claims 1-7 is applied.