JPH0557780B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wireless selective calling receiver with display function.

In recent years, advances in wireless selective calling receivers have been remarkable, and in addition to providing a service that notifies reception by simply using a selective calling signal (a specific number assigned to each subscriber), there are also services that add message information signals to the selective calling signal. A service that displays simple messages by doing so is being considered. For this reason, receivers are designed to have multiple functions such as storing, displaying, and erasing message information. To display this message information, after receiving the selective call signal and the message information signal, a notification sound is sent out to notify that the signal has been received, and at the same time, the display device is driven to display the message information.

Note that, because there are cases where the subscriber is called frequently, or where the subscriber does not immediately take action in response to the message information after receiving it, the subscriber is usually configured to be able to store a plurality of pieces of message information. Currently, the message information content is mainly numerical information, and at most 20 pieces of numerical information are sent as a message information signal. However, in the case of text information, which is expected to become more widespread in the future, it is expected that it will be essential to convey information several to several tens of times as much as numeric information. Therefore, a function of receiving and storing variable length message information is essential as a receiver function.

An object of the present invention is to provide a wireless selective calling receiver with a display function that is equipped with such a function, and is used in a message file stored in a storage area corresponding to individual message information. The object of the present invention is to enable the designation of storage units (hereinafter referred to as sectors) and the setting of file configurations for storing order information, as well as to enable effective use of storage areas.

According to the present invention, in a wireless selective calling receiver with a display function that receives a selective calling signal and a message signal following the selective calling signal, and stores and displays message information obtained by decoding the message signal, a predetermined number of a first storage means for storing the message information; a second storage means for storing information representing a storage area of the first storage means; and for the first and second storage means. and a control means having a function of performing a predetermined control operation based on the message information, and the control means stores information representing a storage area of the first storage means corresponding to the message information in the second storage means. a step of storing the message information in the first storage means; and a step of storing the message information in the first storage means corresponding to the message information when the message information exceeds the storage area of the first storage means. There is obtained a wireless selective calling receiver with a display function, characterized in that the step of storing another information representing a storage area in the second storage means is performed.

According to the present invention, a first storage means for storing a predetermined number of the message information, a second storage means for storing information representing a storage area of the first storage means, and a second storage means for storing information representing a storage area of the first storage means; A third storage means for storing information for determining the usage status of each area of the first storage means.
a storage means, a fourth storage means for storing information for determining the usage state of each area of the second storage means, and a predetermined control operation for the first to fourth storage means. and a control means having a function of performing the following steps: storing information representing a storage area of the first storage means corresponding to the message information in the second storage means; a step of storing information in the first storage means, and a step of erasing information stored in the second storage means corresponding to another message information when there is no storage area in the first storage means. , resetting the information stored in the third storage means corresponding to the other message information, and resetting the information stored in the fourth storage means corresponding to the other message information. A wireless selective calling receiver with a display function is obtained.

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 shows an example of the structure of a received signal of a selective call receiver. In FIG. 1a, P is a prefix signal, F is a frame synchronization signal, N is a selective call signal, and I is a message signal.

A plurality of message signals I are arranged as necessary depending on the message length. Figures 1 b and c are, respectively,
As an example of the selective call signal N and the message signal I, a signal obtained by adding one parity bit to BCHs 31 and 21 is shown. These signals include a 21-bit information bit area INF and a 10-bit check bit area.
It consists of CK and 1-bit even parity EP, and each word consists of 32 bits. The most significant bit MSB of the information bit area INF is used to distinguish between a selective call signal (logic "0") and a message signal (logic "1"), and the remaining 20 bits are used as a subscriber number information area or a message information area.

The message information uses binary coded decimal (BCD) code (4-bit configuration) or ISO-7 bit code. The transmission order is such that messages are transmitted in order starting from the least significant bit LSB of the first message code, and a plurality of message signals are transmitted according to the message length. BCD code or ISO used in messages
A possible method for specifying the code is to use the selective call signal. In other words, it is a method of changing the selective calling signal that sends a message signal using BCD code and the selective calling signal that sends a message signal using ISO code.If the receiver can detect at least these two signals, it can send each message. Can decode signals.

FIG. 2 is a block diagram showing an example of a radio selective calling receiver according to the present invention.

A radio signal received by antenna 1 is amplified and demodulated by radio section 2. The demodulated signal is converted by the waveform shaping circuit 3 into a waveform (digital signal) that can be read by a subsequent decoder 4.
The decoder 4 is a writable read-only memory (P
- It compares its own calling number written in advance in the ROM 5 with the digital signal from the waveform shaping circuit 3, and when they match, it sends a signal to the message processing section 6 to notify the calling. The message processing section 6 uses this signal to decode the message signal, and when the message signal ends, it notifies the decoder 4 to that effect, and also sends a message to the decoder 4.
A sound signal is output to the amplifier 7 via the amplifier 7 to drive the speaker 8. The message processing unit 6 also stores the decoded signal of the message signal in an internal RAM (Ramdom
The information is stored in a file format in an access memory (Access Memory), and visual information is provided via the light-emitting display unit LCD9.

The RT (reset) switch 10 sends its change information and status signal to the message processing section 6 via the decoder 4, and performs operations such as stopping the sound, stopping and starting the LCD display, and so on. Switch SW1~SW3
are connected to the message processing unit 6, and these switches protect each message file.
Set the operation mode for erasing, displaying empty areas, etc. A detailed explanation of these operation modes will be given later. The output terminal 14 is a terminal for outputting data in the message file to the outside, and this operation is also executed in the operation mode. Crystal oscillator 1
Reference numeral 5 denotes a clock generating oscillator for operating the decoder 4.

FIG. 3 shows the message processing section 6 described in FIG.
This is an example of a block configuration.

The 1-chip CPU 21 connected to the decoder 4 is
Input/output terminals, interrupt input terminals, program memory,
It has a built-in data memory, serial input/output terminal, and timer, and receives and decodes the message signals mentioned above, and sends the decoded message information in message file format as SI/SO/SCK and CE2 signals.
Store in RAM22. Also, CPU21 is SI/
The decoded message information is transferred to the LCD driver 23 using SO/SCK and CEI signals, and visible information is provided to the LCD 9. On the other hand, switch SW1~SW
3 is also connected to the CPU 21.

Next, each signal connected between the decoder 4 and the CPU 21 will be explained.

The signal DATA is for transmitting a message signal sent following the selective calling signal, and upon receiving the selective calling signal, the internal gate of the decoder 4 opens and the subsequent reception signal is sent out. This signal is
It stops when the gate from the inside is closed in response to the message end signal MEND from the CPU 21.

The signal CLK is a synchronous clock signal for receiving the message signal sent by the signal DATA, and data is taken in at the rising edge of this signal CLK. This signal CLK is normally at a high level and is sent out when a message signal is sent out, so it can also be used as a start signal.

The signal REC is a reception control signal that reports the received selective call signal when multiple selective call signals are received, and this signal is used to decode the message signal.
Determine whether to use BCD code or ISO code.

The 2kHz signal TCL is the timer's original clock signal. CPU21 uses the built-in timer to output the signal TCL.
By counting the number of pulses, LCD9
Realizes timer functions such as automatic stop of visual display.

The signal RTS is a positive pulse signal sent when the state of the RT switch 10 changes. This signal RTS can also be used as a start signal like the signal CLK.

The signal RT is a state signal of the RT switch 10,
Normally it is at high level, and when RT switch 10 is pressed, it outputs a low level signal.

The signal ALTC is an alert control signal that outputs the aforementioned sound signal, and multiple types of sound signals can be specified by the alert signal ALT.

The signal MEND is a message end communication signal that informs the decoder 4 that reception of the message signal is completed.

Serial signal SI/
SO/SCK and signal CE3 are sent out, and it is also possible to print message information using these signals.

The 1-chip CPU shown here is
μPD7508G is used as an LCD driver, but μPD7228G is used as an LCD driver.
can be used respectively.

4 to 8 show examples of data structures used in the message storage method implemented in the present invention. In the following description, not only the structure of the storage means for receiving and storing variable length message information, which is a feature of the present invention, but also the protection function for preventing deletion and erasure of arbitrary message information accompanying the present invention will be explained. We will also explain.

First, the memory area required for storing, erasing, and protecting message information will be explained. In FIG. 4, M1 to Mi are message file number storage areas for storing the old and new received message information and the corresponding message file number Fi.
The initial value is that all data from M1 to Mi is “0”,
Indicates that no message file number is stored. Next, when a message signal is received and the message file is assigned number F3, F3 information is set in M1. Furthermore, when the message file number Fi is assigned,
Mi←Mi←1, Mi←1←Mi←2, …M2←N1,
It is shifted and stored as M1←Fi, and in this way M1 always stores the number of the latest message file. The message file number stored in Mi will be automatically deleted by the above shift.

In FIG. 5, MP1 to MPj are message file number storage areas for storing the numbers of message files that are not to be deleted among the received message files. To register in this area,
This is performed in the message file protection mode of the operation modes to be described later. For example, when protecting the message file with number F1 stored in M1 in FIG. 4, from area M1 to area MP1
When you perform the transfer operation of number F1 to MP1←F1,
It is updated as MP2←MP1,..., MPj←MPj−1. Also, M1←M2, Mi−1←Mi, Mi
=0.

In FIG. 6a, FSTATUS is a message file status determination area that stores the message file usage status, and is "0" when not in use.
When used, "1" is stored for each message file. Therefore, when a new message file is to be allocated, empty files can be known from this register.

In Figure 6b, SSTATUS is a sector status determination area that stores the usage status of sectors that store message information.Similar to the FSTATUS area, SSTATUS is a sector status determination area that stores the usage status of sectors that store message information. “1” (used) or “0” (unused) is stored in the bit. In other words,
If you want to store message information, this
An empty sector is selected based on the SSTATUS information, and message information is stored in the storage area of that sector.

In FIG. 7, F1 to Fn are message file information areas assigned corresponding to the numbers of each message file, and sector numbers constituting one message file are stored in order for each message file. ing.
In this example, message file F1 is S1, S2,
It is composed of three sectors of S5, and one message information is stored in these sectors.

In FIG. 8, S1 to Sk indicate memory areas allocated corresponding to each sector number, and message information is stored in these areas. In this example,
This shows the case where the number of characters that can be stored in one sector is 10. Within this sector, message information is stored sequentially. i.e. no.
The F1 message file consists of sectors S1, S2, and S5, and the message information is “PLEASE GO TO THE HOTEL.MR A*”
It can be seen that it is. Here, the "*" code is an example of a message end code, and in the case of a visible display, it is known from this code that the message has ended.

According to the message storage method of the present invention explained above, protection of the message file is performed in the message file number storage areas M1 to Mi in FIG.
Transferring the file number from inside to MP1 in the message file number storage area in Figure 5,
It is executed only by updating each M1 to Mi and MP1 to MPj.

Also, erasing the message file can be done using the area
Deletion of a file number from M1-Mi or areas MP1-MPj can be executed by resetting the corresponding bit in the FSTATUS area and the bit corresponding to the sector number being used in the SSTATUS area.

Figure 9 shows the 1-chip CPU 2 used in the present invention.
1 is a schematic program configuration diagram in 1. The main flow is executed after the power is turned on, and in step 101 initial settings of control registers, etc. are performed, and in step 102
Then, check the operation of the RAM 22 (see FIG. 3) and internal program data to confirm that there are no abnormalities. In step 103, it is checked whether there is a processing request from each interrupt, and if there is no processing request, the process waits in a standby state. On the other hand, if there is a request, steps 104 to 108 are executed according to the request, and then the process returns to step 103.

Next, an outline of each process in steps 104 to 108 will be explained.

In step 104, first, the presence or absence of empty files and empty sectors is checked, and if there are none, "Memory Full" is displayed and notified. On the other hand, if there is, the received message information is displayed, a sound signal is sent out, and a timer is activated.

At step 105, the results of the self-diagnosis performed at step 102 are displayed. After this, all dots are displayed and a display for crosstalk confirmation is performed, making it possible to confirm whether the LCD 9 is mounted in the correct position.

Step 106 includes stopping the sound signal in response to changes in the RT switch 10, updating the diagnostic display, starting the operation mode, and various processes within the operation mode, such as erasing and protecting the message file, and outputting the message information to the outside. and executes memory backup processing, etc. Also, the switch performed in step 108
It also starts the monitoring processing of SW1 to SW3.

In step 107, various displays are automatically stopped and updated, and the reception time of switches SW1 to SW3 is monitored.

In step 108, inputs to the switches SW1 to SW3 are monitored, and the display is updated, the operation mode is updated, and the display is stopped depending on the internal state and each switch input.

Next, the CLO (clockout) interrupt flow will be explained. This interrupt flow is activated at the rising edge of the CLO signal, and in step 201 it is determined whether the message signal starts or continues, and at the start, various control flags necessary for receiving the message signal are
Perform initial settings for FLG, counter, etc. In step 202, the message signal is received bit by bit, the counter is updated, and one message signal is received. After that, error correction is performed, and the presence or absence of a message signal is determined using the most significant bit MSB.
If it is a message signal, the message information is stored in a message file in a message storage flow described later. On the other hand, if it is not a message signal, it is determined that the message signal has ended, and a message end signal MEND is used to notify the decoder 4 and a request to start step 104 is made.

The RTS interrupt process is activated at the rising edge of the RTS signal, and since a change has occurred in the RT switch 10, a request for activation of step 106 is made in step 301.

Finally, the timer interrupt processing is performed using the 2kHz signal TCL.
is used as the source clock, and starts when the count number set by the internal timer is reached. In step 401,
In order to notify this fact, a processing request is made in step 107.

FIG. 10 shows a state transition diagram of various displays in this embodiment. Further, the general functions of various operation modes will be explained below.

1 Message file protection mode (PF) activation condition...In message file access mode (AM), by detecting that switch SW1 is pressed.

General function: Changes the attributes of the specified message file and moves it from the current file to the permanent file.

2 Message file deletion mode (DL) Activation condition: Detection of depression of switch SW2 in message file access mode (AM).

General function: Delete the registration of the file specified in the current permanent file.

3 Message file erasure mode (CM)
Activation condition: Detection of depression of switch SW3 in message file access mode (AM).

General function: Delete files all at once using various combinations of current and permanent files.

4 Readout display mode (RO) Activation condition: Based on detection of pressing of RT switch 10 in mode selection mode. Or press switch SW in message display mode (DM)
1 is pressed down.

General function: Reads and displays stored message files.

5 Empty area display mode (FA) Activation condition: Detection of depression of switch SW2 in message display mode (DM).

General function: Displays the number of unused files in the current permanent file and the number of remaining characters in memory.

6 Message number display mode (NF) Activation condition: Based on detection of switch SW3 being pressed in message display mode (DM).

General function: Displays the number of files registered and stored in the current permanent file.

7 Scroll operation setting mode (SM) Activation condition: Based on detection of depression of switch SW1 in operation setting mode (CT).

General function: Switches the scrolling operation in the readout display between automatic and manual, and when automatic, sets the scrolling time.

8 Message output mode (OP) Activation condition: Based on detection of switch SW2 being pressed in operation setting mode (CT).

General function: Transfers specified message file data via serial port.

9 Message backup mode (BM) Switch SW in startup setting mode (CT)
Based on the push-down detection of 3.

General function: Performs memory backup requests and initializes file management information after recovery.

FIG. 11 shows display examples of mode selection for specifying each operation mode, operation setting mode (CT), message file access mode (AM), and message display mode (DM). The switch RT also displays a mode selection display, and the switches SW1 to SW3 then display the accessible operation modes, thereby making the switch operation easier.

To explain an example of the operation, the mode selection display is performed by the switch RT as shown in item 11b, and if the switch SW1 is operated here, the message display mode DM is entered. Next, for example, in FIG. 11e, when the switch SW3 is operated, the message number display mode NF is set and the number of messages is displayed. It goes without saying that each of the above names is given to the receiver itself in the list.

FIG. 12 shows an example of the flow of storing message data into a message file during message data reception in step 202 explained in FIG.

In step 501, the signal DATA is fetched in bits, sequentially stored in the received data RDATA area of the internal memory, and counted to receive a 32-bit signal, before proceeding to step 502.

In step 502, the most significant bit is used to determine whether the signal received in step 501 is a message signal or a selective call signal, as explained in the code structure of FIG.
Determine based on MSB logic. That is, if the signal is a message signal, the process advances to step 503; otherwise, the process advances to step 513.

In step 503, it is determined whether the message is new or continued, and it is determined whether or not to store the message file. In the case of continuation, the storage procedure is not executed and the process advances to step 507. On the other hand, if it is new, step 504
go to

In step 504, it is checked whether the message file number assignment number IFN and the sector number assignment number IFN for storing the message information are not "0". If it is "0", it indicates that there is no empty file or empty sector, and in this case, the message data reception operation ends. On the other hand, if it is not "0", in step 505 the assigned number of the FSTATUS area (Figure 6a) that stores the file usage status is entered.
Set the bit corresponding to IFN to ``1'', set the bit corresponding to the allocation number ISN in the SSTATUS area (Figure 6b) that stores the sector usage status to ``1'', and set the bit corresponding to the allocation number ISN to ``1'' in the sector SC that stores the number of sectors used.
The area is set to "1", and the message file information area FI (Fig. 7), which shows the sector configuration of the message file, contains the sector SC.
Store the sector number ISN in the position corresponding to the number of
Proceed to step 506.

In step 506, a store address area is created to hold the address number for storing message information.
An address proportional to the sector number ISN is set in STAD. Here, α is proportional to the number of characters that can be stored within one sector. After this, proceed to step 507.

In step 507, one character is extracted from the received data RDATA area storing the received message signal, and in step 508 it is determined whether it is a character code. If the code is other than the character code, the process proceeds to step 514 and subsequent steps to end the message data reception. On the other hand, in the case of a character code, it is stored in the message file storage area specified by area STAD in step 509, and updated by adding +1 to the address number of area STAD in step 510, and the process proceeds to step 511. .

In step 511, the address in area STAD is used to monitor whether the data has moved to another sector, and if the border has not been crossed, the process advances to step 512.
It is determined whether storage of the word message signal is completed. If the process has not been completed, the process returns to step 507 and the character extraction and storage process is repeated. on the other hand,
If completed, the process returns to step 501 to receive the next message signal. If it is determined in step 511 that the sector has moved to another sector, 1 is added to the sector SC area that stores the number of used sectors in step 518, and the designated number β is added in step 519.
Determine if it exceeds That is, β
is the number of sectors that can be stored in the message file information area shown in FIG. Here, if the specified number β is exceeded, the process advances to step 515 and the termination procedure is performed. On the other hand, if the specified number β or less, an empty sector is searched for in the SSTATUS area in step 520, and if it is found, the process goes to step 521.
At step 512, the sector number is set as the allocation number ISN, the SSTATUS area is updated, and the sector number is stored in the message file information area.At step 512, the area STAD is reset, and the process proceeds to step 512.
On the other hand, if there is no empty sector, the oldest file Fn stored in areas M1 to Mi is erased in step 523. Step 524 resets the bits in the FSTATUS area corresponding to the file Fn, step 525 resets all the bits in the SSTATUS area corresponding to the sector number used in file Fn, and returns to step 520 to allocate an empty sector. I do.

Step 513 is executed when the received signal is determined to be a selective call signal in step 520, and here it is determined whether the number of used sectors is one or more. In other words,
If there is no message signal, proceed directly to the end. On the other hand, if the number of used sectors stored in the sector SC area is 1 or more, in step 514 an end code "*" is written after the message information, and in step 515 the message file information is written to the message corresponding to the number IFN. Set the file information area to FI. step 516
Now, set the file number code to M1 and shift it sequentially from Mi←Mi+1.
In step 517, a request to start the notification display is issued, and a signal MEND is output to the decoder 4 to notify the end of message data reception, thereby completing the message data reception operation.

As described above, according to the present invention, a plurality of pieces of message information of variable length can be stored and displayed, and the memory is particularly suitable for realizing the function of erasing message information that is no longer needed and erasing protection function of message information that is not desired to be erased. It is possible to provide a wireless selective calling receiver with a display that can effectively use the message information storage area as a format.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the signal configuration used in the present invention, where FIG. 1A shows the overall signal configuration, FIG. 1B shows a selective call signal, and FIG. C shows a message signal. Second
The figure is a block diagram showing an embodiment of a wireless selective calling receiver with a display function according to the present invention. FIG. 3 is a block diagram of the message processing section 6 in FIG. 2.
FIGS. 4-8 are configurations of memory areas according to the invention used for storing message information. Figure 9 shows the chip CPU 2 used in the present invention.
1 is a program configuration diagram in 1. FIG. 10 is a state transition diagram showing changes in various displays of the receiver of the present invention. FIG. 11 shows an example of the display displayed on the display when selecting various operation modes realized by the receiver of the present invention. FIG. 12 is a flowchart illustrating a method for storing message information according to the present invention. DESCRIPTION OF SYMBOLS 1... Antenna, 2... Radio section, 3... Waveform shaping circuit, 4... Decoder, 6... Message processing section, 7... Amplifier, 8... Speaker, 14... External output terminal, 15... Oscillator, 21...1 chip
CPU.

[Claims]

1 A stereo decoding device responsive to an analog composite signal having a pilot signal component and including audio information, which responds to an analog first control signal and generates an oscillation signal whose frequency is controlled in accordance with the first control signal. a controllable oscillator that generates: a controllable oscillator that samples the composite signal in response to the analog composite signal so as to represent the composite signal in numerical bit-weighted form from the composite signal and to generate synchronization information of the pilot signal components; sampling means for generating a bit-weighted sample signal having a first plurality of bits; responsive to the sample signal and the oscillation signal;
means for generating a phase error indicating signal forming a digital word having a second plurality of bits having a bit-weighted value representing a phase difference between said pilot signal component and said oscillating signal; a source; a capacitance; and controllable means having a control terminal for coupling said first current to said capacitance for a predetermined period of time in response to a second control signal applied thereto;

Claims (1)

A wireless selective calling receiver with a display function that stores and displays message information, comprising: a first storage means for storing a predetermined number of the message information; and information representing a storage area of the first storage means. a second storage means for storing information for determining the usage status of each area of the first storage unit; and a third storage unit for storing information for determining the usage status of each area of the second storage unit. a fourth storage means for storing information; and a control means having a function of performing a predetermined control operation on the first to fourth storage means, the control means storing the message information. a step of storing information representing a storage area of the first storage means corresponding to the message information in the second storage means; a step of storing the message information in the first storage means; and a step of storing the message information in the first storage means. If there is no memorizable area, the second message information corresponding to another message information
a step of deleting the information stored in the storage means of the third storage means; a step of resetting the information stored in the third storage means corresponding to the other message information; and a step of resetting the information stored in the fourth storage means corresponding to the other message information. 1. A radio selective calling receiver with a display function, characterized in that the receiver performs a step of resetting stored information.