JP2556082B2 - Car phone equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mobile telephone device including a mobile telephone mobile device (hereinafter referred to as a mobile device) and a telephone terminal (hereinafter referred to as a telephone).

[Conventional technology]

A telephone connected to a mobile device operates normally under adverse conditions such as fluctuations and drops in power supply voltage, pulse noise generated by the electric system of automobiles, static electricity, EMI, etc. that are not comparable to indoor use. Required to do so. For this reason, it is important not only that the telephone itself operates normally but also that the control interfaces of the mobile device and the telephone are reliably synchronized. For this reason, conventionally, a reset line was provided on the interface between the mobile unit and the telephone, and the reset line was pulled out from the I / O port of the mobile unit control unit by resetting the mobile unit control unit and the telephone unit control unit at the same time. The method in which the control unit in the mobile device resets the control unit in the telephone with the master slave has been adopted.

[Problems to be Solved by the Invention]

In the former one of the above-mentioned conventional methods, if noise is mixed in the reset line and it malfunctions, not only the telephone but also the mobile unit is reset, so the sequence operation of the mobile unit is interrupted and the connection is temporarily made. There is a drawback that it becomes inoperable. In the latter case, if there are multiple telephones connected to the interface, there is no means to identify which telephone has failed, so if even one is defective, reset all telephones. However, there is a drawback that it is not efficient. In addition, the number of signal lines in the interface is decreasing as much as possible in combination with the downsizing and cost reduction of the device. In the current situation where signals are being multiplexed, it is necessary to prepare a reset line for the interface. It is impossible.

[Means for solving the problem]

The car telephone device of the present invention transmits a status signal indicating the operating state of the telephone terminal to the car phone mobile unit at regular time intervals, and then a return signal of the status signal is input from the car phone mobile unit within a predetermined time. Then, the first reset signal is output, and when the second reset signal is input, the in-telephone control unit that initializes the telephone terminal, the clock generation unit, and the clock generated from the clock generation unit are counted. , The telephone terminal has an automatic normal mass counter which is reset when the first reset signal is input, and outputs the second reset signal when the first reset signal is not input and counting continues for a certain period of time. , When receiving the status signal output by the control unit in each telephone, the return signal of the status signal is sent to the control unit in each telephone within a fixed time. Automobile telephone mobile station moving flight control section for having.

[Action]

Therefore, when the signal interface between the mobile telephone and the telephone terminal is out of synchronization, the telephone terminal can be reset to return it to its previous state.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a car telephone device of the present invention, and FIGS. 2 (a) and 2 (b) are an initialization signal and a status signal sent to a transmission data line 3 in FIG. , FIG. 3 and FIG. 4 are time charts showing the operation of this embodiment.

The telephone 1 and the mobile device 2 are connected by a transmission data line 3 and a reception data line 4.

The telephone set 1 sends a status signal indicating the state of the telephone set 1 to the transmission data line 3 at regular time intervals T ₀ , and then a return signal of the status signal sent from the mobile device 2 is sent to the transmission data line 3 for a fixed time period T _{0. When} it is received within _R , an automatic normal reset pulse is output to the automatic normal reset signal line 8, and when a reset pulse is input from the reset signal line 9, the internal control unit 5 for the telephone is set to the initial state.
Then, the clock generator 7 and the clock 10 generated by the clock generator 7 are counted from the timing when the status signal is sent out, and reset to the reset signal line 9 after counting up for a certain time T ₁ (where T ₁ > T _R ). An automatic mass counter 6 for outputting a pulse is included. On the other hand, the in-mobile unit control unit 11 of the mobile device 2 has a function of transmitting the return signal to the reception data line 4 when receiving the status signal via the transmission data line 3.

The initial signal 21 sent to the transmission data line 3 is the second
As shown in FIG. 7A, it is made up of 7 bits, 4 bits from the LSB are allocated "1111", and the upper 3 bits are allocated a signal string "000" indicating the initial signal. As shown in FIG. 2 (b), the status signal 22 is assigned “111” indicating the status signal to the upper 3 bits, the 5th bit is the hook state, the 6th bit is the display part, the illumination of the push button, etc. The lit state and the 7th and 8th bits indicate which audio output unit (the speaker provided in the handset and the telephone body) is used.

Next, the operation of this embodiment will be described with reference to the time charts of FIGS.

(1) When the signal interfaces of the telephone 1 and the mobile device 2 are synchronized (Fig. 3). In this case, the return signal 32 for the status signal 31 transmitted from the in-telephone control unit 5 to the mobile device 2 via the transmission data line 3 is received by the in-telephone control unit 5 via the reception data line 4 after time T _R. ,
In response to this, the in-telephone control unit 5 outputs an automatic normal mass reset pulse 33 to the automatic normal mass reset line 8,
The automatic mass counter 6 is reset. As a result, the automatic mass counter 6 does not count up,
The in-telephone control unit 5 continues to operate and outputs the status signal 34 again. Then, the return signal 35 is received, and the automatic mass reset pulse 36 is output.

(2) When the signal interfaces of the telephone 1 and the mobile device 2 are out of synchronization (Fig. 4). In this case, the telephone control unit 5
Although the status signal 41 is transmitted from the transmission data line 3 to the transmission data line 3, since the return signal of the status signal 41 cannot be received within the time T _R , the in-telephone control unit 5 does not generate the automatic normal reset pulse 42. . As a result, the reset pulse 43 is sent from the automatic mass counter 6 to the reset signal line 9 after a time T ₁ from the transmission of the status signal 41.
Is output and the control unit 5 in the telephone is reset. Therefore, after this reset pulse, the transmission data line 3
Initialization signal 44 is sent to, T _R as the response
The status signal immediately before from the mobile unit control unit 11 within the time
A return signal 45 is sent out according to the content received at 41, and the in-telephone control unit 5 receives this signal and outputs an automatic normal mass reset pulse 46 to the automatic normal mass reset line 8 to restore the synchronization of the signal interface.

〔The invention's effect〕

As described above, according to the present invention, the initialization signal and the status signal are assigned to the signal format between the telephone and the mobile device, the status signal is periodically transmitted from the telephone to the mobile device, and the return signal is received within a fixed time. If not, reset the phone and then restore the phone to the previous state by the initialization signal so that there is no malfunction like when using the reset line, and only the phone whose signal interface is out of sync can be used. There is an effect that it is efficient because it is reset.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a car telephone device of the present invention, and FIGS. 2 (a) and 2 (b) are sent to a transmission data line 3 and a reception data line 4 in FIG. The signal format, FIG. 3, and FIG. 4 are time charts showing the operation of this embodiment. 1 ... phone, 2 ... mobile unit, 3 ... transmission data line, 4 ... reception data line, 5 ... internal control unit of phone, 6 ... automatic mass counter, 7 ... clock generation unit, 8 ... … Autonomous reset line, 9… Reset signal line, 10… Clock, 11… Mobile unit control section.

Claims (1)

(57) [Claims] 1. A car telephone apparatus comprising a car phone mobile unit and a telephone terminal transmits a status signal indicating an operating state of the phone terminal to the car telephone mobile unit at regular intervals, and thereafter, the status is sent from the car telephone unit. When a signal return signal is input within a predetermined time, a first reset signal is output, and when a second reset signal is input, the telephone terminal control unit that initializes the telephone terminal, a clock generation unit, When the clock generated from the clock generation unit is counted and reset when the first reset signal is input and the first reset signal is not input and counting is continued for a certain period of time,
When the telephone terminal has an automatic mass counter that outputs a second reset signal and receives a status signal output by each telephone control unit, a return signal of the status signal is sent to each telephone control unit within a certain time. A mobile phone device, wherein the mobile phone mobile device has a control unit in the mobile device for transmitting.