KR100928257B1 - How to determine boot mode of mobile terminal - Google Patents

Abstract

The present invention detects the voltage level of the UART receiving signal pin of the mobile communication terminal to determine the boot mode primarily, and after determining the primary boot mode, the mobile mode to secondly determine the boot mode according to the ready state of the PC. It provides a method of determining a boot mode of a terminal.

Description

Method for deciding booting mode of mobile terminal {Method for deciding booting mode of mobile phone}

1 is a block diagram showing a connection of a receiving connector for serial data communication between a conventional mobile communication terminal and a PC.

Figure 2 is a block diagram showing a detailed configuration of a receiving connector to which the present invention is applied.

3 is a partial configuration diagram of a hardware device required to implement the boot mode determination method of the present invention.

4 is a flowchart showing the overall operation flow according to the boot mode determination method of the present invention.

The present invention relates to a method for determining a boot mode of a mobile communication terminal.

In general, a receiving connector is formed at the bottom of a mobile communication terminal, and a serial communication interface and a vehicle-free hands-free device for a development environment, a wireless modem function using a personal computer (PC), and a personal information management function using a PC, etc. It is used to provide a power source to a charger device using an interface function and an external power source for transmitting a digital audio signal to and will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a connection of a receiving connector for serial data communication between a conventional mobile communication terminal and a PC. As shown in FIG. 1, a main control unit located in the terminal 10 and controlling a serial data communication function ( 20, and a receiving connector portion 30 and a power supply portion 40 for interfacing signal lines necessary for serial data communication with the main control portion 20.

The main controller 20 may be a central processing unit (for example, a CPU) that collectively controls the WCDMA terminal in the asynchronous WCDMA terminal, and a central processing unit that collectively controls the CDMA terminal in the synchronous CDMA terminal. (For example, MSM: Mobile System Modem).

In addition, for serial communication with a PC, the data kit cable includes a plug connector 50 for connection with the receiving connector unit 30 and RS-232C serial communication for a PC and an RS-232C serial communication protocol interface. RS-232C line driver 60 to support the electrical compatibility of the protocol, and 9-pin connector 70 for connecting to the serial port of the PC.

Here, the configuration of the receiving connector unit 30 of the mobile communication terminal 10 is composed of a connector of about 18 pins to 24 pins according to the required function, but as the number of pins increases, the size of the connector increases, so that the overall Because it is limited in size or design, it mainly uses a receiving connector portion 30 made of 18 pins.

In the connection of the receiving connector for serial data communication between the mobile communication terminal and the PC, the conventional debugging mode selection technique checks whether data is stored in the receiving buffer of the UART during the booting time of the terminal and checks the data in the receiving buffer. Is detected, the terminal is booted in debugging mode and if no data is detected in the receiving buffer, the device operates in normal operation mode. In the PC stage, the data is periodically sent to the terminal at intervals shorter than the boot time of the terminal before booting. There is a drawback to sending.

In this way, data is stored in the reception buffer of the terminal and can be detected in the boot time to operate in the debugging mode. Otherwise, there is a problem that the terminal cannot be operated in the debugging mode.

Accordingly, the present invention has been proposed to solve the above-described problems, and the mobile communication terminal of the mobile communication terminal to detect the received signal of the UART used as the debugging port of the terminal to boot in the debugging mode according to the ready state of the PC terminal The purpose is to provide a boot mode determination method.

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In order to achieve the above object, a booting mode determining method of a mobile communication terminal according to the present invention includes detecting a voltage level of a UART receiving signal pin of a mobile communication terminal to determine a booting mode of the mobile communication terminal; And determining the boot mode of the mobile communication terminal secondly according to the ready state of the PC after determining the primary boot mode.
In the first step of determining the booting mode, the booting mode may be determined according to the voltage level of the UART receiving signal pin after initializing the memory and the UART during the initial booting of the mobile communication terminal.
In the primary determining of the boot mode, the boot mode is determined as a normal operation mode when the voltage level of the UART receiving signal pin is low level, and the boot mode is determined when the voltage level of the UART receiving signal pin is high level. This can be determined by the readiness of the PC.
In the second step of determining the booting mode, the booting mode may be determined according to whether the mobile communication terminal transmits a ready signal to the PC and then receives an acknowledgment signal from the PC.
In the second step of determining the booting mode, if there is no acknowledgment signal from the PC, the booting mode is determined as a normal operation mode, and if the acknowledgment signal from the PC is received, the booting mode is debugged. You can decide in mode.
The mobile communication terminal may connect a pull-down resistor to the UART receiving signal pin of the mobile communication terminal to stabilize the voltage level of the UART receiving signal pin.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
2 is a block diagram showing a detailed configuration of a receiving connector to which the present invention is applied, and as shown therein, a power supply voltage terminal (BATT_VCC) for connecting a power terminal of a battery to the main control unit 20 and the connector unit 30. And ground terminal (BATT_GND), power connection detecting terminal (VEXT_DC_SENS) for detecting the operation of the terminal by the external power source other than battery, and whether or not the external power connection for charging, and universal asynchronous transmission / reception terminal (UART) Serial communication terminal (RS-233C) for providing a serial data communication interface with, digital audio output terminal (AUX_PCM) for transmitting and receiving digital audio signals, ground terminal (GND) for system ground connection of the terminal, and external direct current. It is composed of DC connection terminal (VEXT_DC) for power connection.

Here, the universal asynchronous transmission and reception terminal (UART) of the main control note 20 to provide a RS232C serial communication interface, to communicate with or send data to a modem or PC and other serial devices, that is, The bytes received from the control unit 20 are converted into a single serial bit stream to be transferred to the outside, or the serial bit stream is converted into bytes for processing by the main control host 20.

That is, the serial communication function between the mobile communication terminal and the PC can download a program from the PC in the development stage of the terminal, or share the personal information (phonebook, schedule management, etc.) data of the mobile communication terminal with the information management function program of the PC. In order to transmit and receive data by connecting to a PC, the receiving connector 30 of the mobile communication terminal is connected to the outlet connector of the data kit cable, and the connector is connected to the serial port of the PC to use a program for serial communication of the PC. To transmit the data.

3 is a partial configuration diagram of a hardware device required to implement the boot mode determination method of the present invention, when the UART port is not connected by grounding by connecting a pull-down resistor (R) to the UART receiving signal pin of the terminal. Ensure that the voltage level remains stable at the low level.

In FIG. 3, the terminal checks whether the boot code is connected to the debugging port, and detects whether the terminal is ready for debugging on the PC side when connected.

Then, the received signal of the UART is used to determine whether to operate the terminal in the normal mode or the debugging mode.

In most cases where a terminal is used, the debugging port is not connected. In this case, the voltage level on the receive signal pin of the UART will remain low.

If the voltage level of the received signal pin of the UART is maintained at a low level, the terminal immediately boots into normal operation mode. When the UART port is connected for software upgrade or terminal status check, the voltage level of the UART received signal pin is high. To maintain the level.

If the voltage level of the UART receiving signal pin is maintained at a high level, it is determined whether to boot into debugging mode or normal operation mode according to the reaction of the PC side.

As described above, the boot mode of the mobile communication terminal is primarily determined by detecting the voltage level of the UART receiving signal pin, and then the boot mode of the mobile communication terminal is secondarily selected according to the ready state of the PC (computer test apparatus). .                     

4 is a flowchart showing the overall operation flow according to the boot mode determination method of the present invention. When the operation of the terminal is started, the memory is initialized at the time of terminal booting and the UART port is initialized at the same time (401).

After initializing the UART port (401) and determining whether the voltage level of the UART receiving signal pin is high level (402), if the voltage level of the UART receiving signal pin is low level rather than high level, the terminal enters the normal operation mode. (403)

As a result of determining whether the voltage level of the UART receiving signal pin is high level (402), if the voltage level of the UART receiving signal pin is high level, the terminal transmits a ready signal to the PC side (404), and then receives an acknowledgment from the PC. It is determined whether the signal has been received (405).

The acknowledgment character (Ack) signal is a character used to transmit data using an error detection signal, and to check whether an error occurs in the data at the receiving end and notify the transmitting end at a predetermined period. Used to know that no error occurred in the received data.

If the Ack signal is not received from the PC (405), and if the Ack signal is not received from the PC, the terminal enters (403) to operate in the normal operation mode.

If the Ack signal is received from the PC as a result of determining (405) whether the Ack signal is received from the PC, the terminal enters 406 to operate in the debugging mode.
The method of determining the boot mode of the mobile terminal described above may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be all or part of each of the embodiments so that various modifications may be made. It may be configured in combination.

As described in detail above, the present invention detects the voltage level of the UART used as the debugging port of the terminal and enables booting in the debugging mode according to the ready state of the PC terminal, so that data is stored in the receiving buffer of the terminal and booting time is performed. It detects inside and provides the effect to operate the terminal in debugging mode.

Claims (8)

Determining a boot mode of the mobile communication terminal by detecting a voltage level of a UART receiving signal pin of the mobile communication terminal; And  And determining a boot mode of the mobile communication terminal secondly according to the ready state of the PC after determining the first booting mode. The method of claim 1, wherein the first step of determining the boot mode, And initializing a memory and a UART upon initial booting of the mobile communication terminal and determining the booting mode according to the voltage level of the UART receiving signal pin. The method of claim 2, wherein the first step of determining the boot mode, And determining a boot mode as a normal operation mode when the voltage level of the UART receiving signal pin is at a low level. The method of claim 2, wherein the first step of determining the boot mode, And determining the boot mode according to the ready state of the PC when the voltage level of the UART receiving signal pin is high level. The method of claim 1, wherein the secondary determination of the boot mode, And determining the booting mode according to whether the mobile communication terminal transmits a ready signal to the PC and then receives an acknowledgment signal from the PC. The method of claim 5, wherein the secondary determination of the boot mode, And determining the booting mode as a normal operation mode if there is no acknowledgment signal from the PC. The method of claim 5, wherein the secondary determination of the boot mode, And determining a booting mode as a debugging mode when receiving an acknowledgment signal from the PC. The method according to claim 1, And a pull-down resistor is connected to the UART receiving signal pin of the mobile communication terminal to stabilize the voltage level of the UART receiving signal pin.

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