JP4153655B2 - Data processing apparatus and digital key telephone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a data processing block configured to receive and accumulate commands or data, perform data processing using the accumulated commands or data, and to erase the accumulated commands or data when reset. The present invention relates to a data processing device and a digital button telephone.
[0002]
[Prior art]
Conventionally, a digital key telephone is connected to a main device of a key telephone device, and is configured as shown in FIG. The digital key telephone is composed of a ping-pong transmission IC 1, a multi-function codec 2, an MPU (microcomputer) 3, an input / output controller 4, a dial key, an LED, a hook switch, etc. An output unit 5 is provided.
[0003]
The ping-pong transmission IC 1 transmits and receives audio signals and control signals by digital signals. The B1out terminal of the ping-pong transmission IC 1 is a terminal for outputting a digital audio signal sent from the main device, and the B1in terminal is an input terminal for a digital audio signal coming from the multi-function codec 2.
[0004]
The BCLK terminal of the ping-pong transmission IC 1 is an output terminal for the basic clock of the two digital audio signals, and one clock of the basic clock corresponds to one bit of the audio signal. The Fsync terminal is an output terminal of the frame clock, and one frame clock appears for every predetermined number of basic clocks to indicate a break of audio data.
[0005]
The multi-function codec (CODEC) 2 decodes and converts the digital signal received from the main apparatus, and encodes and digitizes the analog signal sent to the main apparatus. Encoding and decoding are performed by the coder / decoder 21, analogization is performed by the DA converters 23 and 25, and digitization is performed by the AD converters 24 and 26.
[0006]
The speech network 22 includes a voice switch, an echo canceller, a multiplexer for switching a signal path, and the like that perform conversion to a signal level according to a difference in a call form such as a handset or a speakerphone in a digital signal state. The DA converters 23 and 25 and the AD converters 24 and 26 are connected to the handset 61, the speaker 62, and the microphone 63 via an analog amplifier.
[0007]
Further, the MPU interface 27 provided in the multi-function codec 2 is provided with a register 27R for storing commands and data given by the MPU 3, and information (command, In response to the data, the MPU interface 27 performs call circuit gain control, voice signal path control, and the like.
[0008]
The MPU 3 receives information related to the movement of the hook switch and the key operation in the input / output unit 5 via the input / output controller 4 and controls the turning on and off of the LEDs. The MPU 3 transmits and receives control signals to and from the main apparatus via the ping-pong transmission IC 1 and controls the multi-function codec 2 by giving commands and data to be written to the register 27R of the MPU interface 27.
[0009]
In the above digital button telephone, the multi-function codec 2 has a multi-function and complicated configuration. For example, the multi-function codec is caused by disturbance factors such as static electricity from the handset 61, the speaker 62, the microphone 63, and the like. 2 may be reset and the contents of the register 27R may be lost. If the contents of the register 27R are lost, the current state cannot be maintained, and the next processing cannot be performed, so that there is a problem that the call state cannot be maintained.
[0010]
Therefore, conventionally, the MPU 3 repeatedly overwrites the command and data having the same contents in the register 27R at an appropriate time interval. However, this operation is not only a wasteful operation as long as no reset occurs, but also faster than the control process of receiving information on hook switch movements and key operations in the input / output unit 5 performed by the MPU 3 and turning on / off the LEDs. Therefore, it was necessary to increase the functionality of digital key telephones, resulting in high costs. In addition, the multi-function codec side writes the same data again and again, and a part of the original signal processing capability is deprived of the write time, and the multi-function codec's capability is impaired.
[0011]
As a countermeasure against this, for example, a configuration as shown in FIG. 5 can be adopted. The digital button telephone of FIG. 5 shown with the same reference numerals as those of the digital button telephone of FIG. 4 has an IO port 28 connected to the MPU interface 27 of the multi-function codec 2A, and the MPU interface 27 is instructed by the MPU 3. Is configured to write a signal different from the initial state to the IO port 28, and the MPU 3 periodically detects the output signal of the IO port 28.
[0012]
According to the method shown in FIG. 5, the MPU 3 only needs to periodically detect the value of its own input port, and it is not necessary to write a command or the like, so the load can be reduced.
[0013]
[Problems to be solved by the invention]
However, according to the configuration of the digital button telephone shown in FIG. 5 described above, it is necessary to provide one terminal of the IO port 28 in the multi-function codec 2A. Since the multi-function codec is standardized, it is impossible to increase one terminal. is there.
[0014]
The present invention has been made as a solution to the problems of the conventional digital key telephones as described above, and its purpose is to perform high-speed processing in order to cope with the loss of commands or data accumulated by resetting. It is another object of the present invention to provide a data processing device and a digital key telephone that perform appropriate processing without changing the configuration of the standardized port number.
[0015]
[Means for Solving the Problems]
The data processing apparatus according to claim 1 of the present invention receives and accumulates commands or data, performs data processing using the accumulated commands or data, and loses the accumulated commands or data when reset. A data processing apparatus comprising: a data processing block configured as described above; and a control block that gives a command or data to the data processing block and that gives a command or data again when the data processing block is reset An input / output port provided in the block and capable of switching between an output state and an input state, signal sending means for sending a signal whose signal level changes as appropriate to the input / output port, and the input / output port when reset In the output state, depending on the control from the control block Port control means for changing the state of the input / output port, and the control block monitors a signal sent to the input / output port by the signal sending means and gives a command or data again based on the monitoring result A process is executed. As a result, the input / output port is in the output state when reset, and the signal sent to the input / output port by the signal sending means cannot be detected, so that the reset can be detected and the command or data can be given again. .
[0016]
The data processing device according to claim 2 of the present invention is characterized in that when the control block executes a process of giving a command or data again, the state of the input / output port is changed to an input state. . As a result, when a process for giving a command or data is executed again, a signal whose signal level changes appropriately as the state of the input / output port changes to the input state is input.
[0017]
The digital key telephone set according to claim 3 of the present invention receives and accumulates commands or data, performs processing related to the telephone using the accumulated commands or data, and the accumulated commands or data are lost when reset. In a digital button telephone comprising: a codec configured to provide a microcomputer or a command or data that gives a command or data to the codec, and that gives a command or data again when the codec is reset. An input / output port that can be switched between the input state, a transmission processing block that performs transmission processing between the main device and the codec, and that transmits a signal whose signal level appropriately changes to the input / output port; When reset, the input / output port And a port control means for changing the state of the input / output port in accordance with control from the microcomputer, the microcomputer sending a signal to the input / output port by the transmission processing block And a process of giving a command or data again based on the monitoring result. As a result, when reset, the input / output port is in the output state, the signal sent to the input / output port by the signal sending means cannot be detected, the reset can be detected, and the command or data can be given again.
[0018]
According to a fourth aspect of the present invention, when the microcomputer executes a process of giving a command or data again, the state of the input / output port is changed to an input state. . As a result, when a process for giving a command or data is executed again, a signal whose signal level changes appropriately as the state of the input / output port changes to the input state is input.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
A digital button telephone and a data processing apparatus according to the present invention will be described below with reference to the accompanying drawings. The digital button telephone according to the embodiment of the present invention shown in FIG. 1 with the same reference numerals assigned to the same components as those of the digital button telephone of FIG. 4 includes a ping-pong transmission IC 1 that transmits and receives information to and from the main unit, A function codec 2B, an MPU (microcomputer) 3, an input / output controller 4, an input / output unit 5 including dial keys, LEDs, hook switches, and the like are provided.
[0020]
The ping-pong transmission IC 1 transmits and receives audio signals and control signals by digital signals. The B1out terminal of the ping-pong transmission IC 1 is a terminal that outputs a digital audio signal sent from the main device, and the B1in terminal is an input terminal for a digital audio signal that arrives from the multi-function codec 2B.
[0021]
The BCLK terminal of the ping-pong transmission IC 1 is an output terminal for the basic clock of the two digital audio signals, and one clock of the basic clock corresponds to one bit of the audio signal. The Fsync terminal is an output terminal of the frame clock, and one frame clock appears for every predetermined number of basic clocks to indicate a break of audio data.
[0022]
The multi-function codec (CODEC) 2B decodes and converts a digital signal received from the main apparatus, and encodes and digitizes an analog signal sent to the main apparatus. Encoding and decoding are performed by the coder / decoder 21, analogization is performed by the DA converters 23 and 25, and digitization is performed by the AD converters 24 and 26.
[0023]
The speech network 22 includes a voice switch, an echo canceller, a multiplexer for switching a signal path, and the like that perform conversion to a signal level according to a difference in a call form such as a handset or a speakerphone in a digital signal state. The DA converters 23 and 25 and the AD converters 24 and 26 are connected to the handset 61, the speaker 62, and the microphone 63 via an analog amplifier.
[0024]
Further, the MPU interface 27 provided in the multi-function codec 2B is provided with a register 27R for storing commands and data given by the MPU 3, and information (command, In response to the data, the MPU interface 27 performs call circuit gain control, voice signal path control, and the like.
[0025]
The MPU 3 receives information related to the movement of the hook switch and the key operation in the input / output unit 5 via the input / output controller 4 and controls the turning on and off of the LEDs. In addition, the MPU 3 transmits and receives control signals to and from the main apparatus via the ping-pong transmission IC 1, and controls the multi-function codec 2B by giving commands and data to be written to the register 27R to the MPU interface 27.
[0026]
The digital button telephone according to the present embodiment has an input / output port 10 as shown in FIG. 2 capable of switching between an output state and an input state as a port for the coder / decoder 21 of the multi-function codec 2B to receive the frame clock SYNC. Provide.
[0027]
The input / output port 10 is connected by a terminal 11 to a resistor R provided on a signal line on the ping-pong transmission IC 1 side. In order to obtain the output state (output port mode) of the input / output port 10, an H level is given to the enable terminal of the logic circuit 13. As a result, an output appears at the output terminal of the logic circuit 13 corresponding to the input level of the data terminal of the logic circuit 13. By applying the H level to the data terminal of the logic circuit 13, the L level is output to the output terminal 13-1, the PMOS-FET (hereinafter referred to as PMOS) 14 is turned on, and the voltage VDD appears at the connection point P1 and the frame. The output state (output port mode) is realized by blocking the acceptance of the clock SYNC.
[0028]
In the output state (output port mode) in which the data terminal and enable terminal of the logic circuit 13 are given an H level, the L level is outputted to the output terminal 13-2 of the logic circuit 13 and the NMOS-FET (hereinafter referred to as NMOS). ) 18 is off, the signal level of the output terminal 13-1 of the logic circuit 13 is L level, the PMOS 17 is turned on, the voltage VDD appears at the point P3, and the voltage VDD is output to the terminal 11.
[0029]
In order to obtain the input state (input port mode) of the input / output port 10, L level is input to the enable of the logic circuit 13. As a result, the L level is outputted to the H level 13-2 terminal to the output terminal 13-1 of the logic circuit 13, and PM0S17 and NM0S18 are turned off. Further, when the L level is output to the terminal 13-2, the PMOS 4 operates so as to function as a pull-up resistor, thereby realizing an input state (input port mode) in which the frame clock SYNC is received at the connection point P1.
[0030]
In the above input state (input port mode), PM0S15 and NM0S16 are set so that terminal 12 becomes L level when L level arrives at terminal 11, and terminal 12 becomes H level when H level arrives at terminal 11. The on / off buffer is configured, and the same signal as the frame clock SYNC appears at the terminal 12 in the input state (input port mode).
[0031]
The output from the terminal 12 is supplied to the coder / decoder 21, and the MPU interface 27 under the control of the MPU 3 controls the input data and input enable of the logic circuit 13.
[0032]
The MPU 3 takes in the signal of the terminal 11 through the signal line 31 and monitors whether the signal level changes appropriately (whether the frame clock SYNC has arrived).
[0033]
In the digital button telephone configured as described above, the input / output port 10 is in the output state (output port mode) immediately after the power is turned on, but the command and data are written to the register 27R under the control of the MPU 3, and the input state is established. The operation is changed to (input port mode).
[0034]
In this state, the MPU 3 takes in the signal of the terminal 11 via the signal line 31 and monitors whether the signal level changes appropriately (whether the frame clock SYNC has arrived). Here, when the multi-function codec 2B is reset and the contents of the register 27R are lost, the data input to the logic circuit 13 and the enable signal level change, and the output terminal 13-2 of the logic circuit 13 has an L level. As a result, the signal level of the output terminal 13-1 becomes L level, the voltage VDD appears at the connection point P1, and the output state (output port mode) that prevents the reception of the frame clock SYNC is realized.
[0035]
That is, the MPU 3 takes in the signal of the terminal 11 through the signal line 31 and monitors whether or not the signal level changes appropriately. However, since the constant voltage VDD is input, the multi-function codec 2B is reset. Detect that. Therefore, the MPU 3 rewrites the command, data, etc. previously written in the register 27R. Thereby, the multi-function codec 2B recovers from the reset state.
[0036]
FIG. 3 shows a configuration diagram of a display processing apparatus to which the present invention is applied. The display processing apparatus includes a display processing unit 70 that constitutes a data processing block that performs data processing (here, display processing), and an MPU 80 that constitutes a control block that controls the display processing unit 70.
[0037]
The display processing unit 70 includes a controller 71 and a display (LCD) panel 72, and the controller 71 includes an MPU interface 73, an LCD controller / driver 74, and a display RAM 75.
[0038]
The MPU interface 73 receives the command or data and the information on the display position via the 8-bit bus lines P0 to P7 and sends them to the LCD controller / driver 74 while receiving the control signal of the chip select CE and command data CD. . In response to this, the LCD controller / driver 74 stores the display data and the display position information in the corresponding area of the display RAM 75 and uses them when displaying on the display panel 72. When receiving a command, the LCD controller / driver 74 performs corresponding control.
[0039]
When the display processing unit 70 is reset due to the influence of unnecessary noise or the like, the display is not appropriately performed due to destruction of data stored in the display RAM 75 or the like. Therefore, in this embodiment, the input / output port 10 shown in FIG. 2 is adopted as a port corresponding to the bus line P0 of the MPU interface 73.
[0040]
The bus line P0 is provided with a resistor R2, and the signal line 81 is folded back to the MPU 80 from the bus line P0 on the display processing unit 70 side than the resistor R2.
[0041]
In the above configuration, the MPU 80 and the display processing unit 70 operate as follows. Immediately after power-on and immediately after reset, control is performed with the upper 4 bits (P4 to P7) of the 8-bit bus, and a command for switching to 8-bit control is sent from the MPU 80 to the controller 71 in the 4-bit control. Switching to 8-bit control is performed.
[0042]
As in the case of the embodiment shown in FIG. 1, immediately after the power is turned on, the input / output port 10 corresponding to the bus line P0 in the MPU interface 73 is in an output port state. Then, by controlling the upper 4 bits (P4 to P7) and instructing the MPU 80, the input / output port 10 corresponding to the bus line P0 is switched to the input port.
[0043]
The MPU 80 monitors the level of the bus line P0 of the least significant bit and monitors whether it matches the signal level output from its own device. When the controller 71 is reset due to disturbance or the like, the input / output port 10 corresponding to the bus line P0 is switched to the output port. Since the level of the bus line P0 of the least significant bit is the least significant bit of the data, it changes accordingly. By monitoring this bit, the input / output port 10 corresponding to the bus line P0 is switched to the output port as described above. Reset can be detected appropriately.
[0044]
Upon detecting this, the MPU 80 controls the upper 4 bits (P4 to P7) again and switches the input / output port 10 corresponding to the bus line P0 to the input port according to the instruction of the MPU 80. In addition, the display RAM 75 is restored.
[0045]
【The invention's effect】
As described above, in the data processing apparatus according to the first aspect of the present invention, the data processing block is provided with the input / output port capable of switching between the output state and the input state. Is changed to an output state, the state of the input / output port is changed according to control from the control block, a signal sent to the input / output port is monitored in the control block, and a command or data is given again based on the monitoring result Since the process is executed, the input / output port is in the output state when reset, the signal sent to the input / output port cannot be detected by the signal transmission means, the reset can be detected, and the command or data is given again It is not necessary to perform high-speed processing in preparation for resetting, and it is appropriate without changing the standardized number of ports. Process it is possible to perform.
[0046]
Further, according to the data processing device of the present invention, the control block changes the state of the input / output port to the input state when executing the process of giving a command or data again. It is possible to properly restore the state before the reset.
[0047]
According to the digital button telephone of the present invention as set forth in claim 3, the command or data is received and stored, and the stored command or data is used to perform processing related to the telephone. A codec configured to lose a command or data; and a microcomputer that gives a command or data to the codec and gives a command or data again when the codec is reset. A transmission processing block for performing transmission processing between the input / output port capable of switching between a state and an input state, a main apparatus and the codec, and sending a signal whose signal level appropriately changes to the input / output port When reset, the I / O port is set to the output state. Port control means for changing the state of the input / output port in accordance with control from the microcomputer, the microcomputer monitors the signal sent to the input / output port by the transmission processing block, Since the process of giving the command or data again is executed based on the monitoring result, the input / output port is in the output state when reset, and the signal sent to the input / output port cannot be detected by the signal sending means, and the reset has occurred. It is possible to detect and give a command or data again, it is not necessary to perform high-speed processing in preparation for resetting, and appropriate processing can be performed without changing the standardized number of ports.
[0048]
According to the digital button telephone of the present invention as set forth in claim 4, when the microcomputer executes a process of giving a command or data again, the state of the input / output port is changed to an input state. So it can recover properly from reset.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a digital button telephone according to an embodiment of the present invention.
FIG. 2 is a detailed configuration diagram of a main part of the digital button telephone according to the embodiment of the present invention.
FIG. 3 is a configuration diagram of a data processing apparatus according to an embodiment of the present invention.
FIG. 4 is a configuration diagram of a conventional digital button telephone.
FIG. 5 is a block diagram of a digital key telephone improved from the conventional example.
[Explanation of symbols]
1 Ping-pong transmission IC 2B Multi-function codec 3 MPU (microcomputer) 4 Input / output controller 5 Input / output unit 10 Input / output port 27 MPU interface 27R Register

Claims (4)

A data processing block configured to receive and accumulate commands or data, perform data processing using the accumulated commands or data, and to erase the accumulated commands or data when reset,
In a data processing apparatus comprising a control block for giving a command or data to the data processing block and for giving a command or data again when the data processing block is reset,
An input / output port provided in the data processing block and capable of switching between an output state and an input state;
A signal sending means for sending a signal whose signal level appropriately changes to the input / output port;
Port control means for setting the input / output port to an output state when reset and changing the state of the input / output port in accordance with control from the control block;
The data processing apparatus, wherein the control block monitors a signal sent to the input / output port by the signal sending means and executes a process of giving a command or data again based on a monitoring result. The data processing apparatus according to claim 1, wherein the control block changes the state of the input / output port to an input state when executing a process of giving a command or data again. A codec configured to receive and accumulate commands or data, perform processing related to the telephone using the accumulated commands or data, and to erase the accumulated commands or data when reset;
In a digital button telephone provided with a microcomputer that gives a command or data to the codec and gives a command or data again when the codec is reset,
An input / output port provided in the codec and capable of switching between an output state and an input state;
A transmission processing block that performs transmission processing between the main device and the codec, and sends a signal whose signal level appropriately changes to the input / output port;
Port control means for setting the input / output port to an output state when resetting, and changing the state of the input / output port according to control from the microcomputer,
The digital button telephone is characterized in that the microcomputer monitors a signal sent to the input / output port by the transmission processing block and executes a process of giving a command or data again based on a monitoring result. 4. The digital button telephone according to claim 3, wherein the microcomputer changes the state of the input / output port to an input state when executing a process of giving a command or data again.

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