JP2770383B2 - Selective paging radio receiver - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a selective call radio receiver.

[Prior art] In a conventional selective call radio receiver, the power switch is turned off.
Then, power was not supplied to the memory means, and all stored messages had disappeared. Or JP-A-56
A message deletion switch was provided as in -93440 to delete messages one by one.

[Problems to be Solved by the Invention] However, in the conventional selective paging wireless receiver, an important message to be stored is erased, and an erasing mode is set to forcibly erase an unnecessary message. After that, there was a problem that they had to be erased one by one. Therefore, the present invention provides a power switch
It is an object of the present invention to provide a selective calling radio receiver that is easy to handle by automatically deleting unnecessary messages instantly after being turned on or off.

[Means for Solving the Problems] A selective call radio receiver according to the present invention determines a plurality of message areas for storing received messages and whether or not the messages stored in the message areas are protected. A plurality of protect flag areas for storing a protect flag for each message, a plurality of unconfirmed flag areas for storing an unconfirmed flag for each message indicating whether the message has been confirmed by the user, and a message area. A memory means comprising a message flag area for storing a message flag indicating whether or not the stored information is valid for each of the message areas, so that data is not erased even when a power switch is turned off; The message received by the message flag is invalid. Message storage means for storing in the storage area; power switch determination means for determining whether the power switch has been operated; and protection when the power switch determination means determines that the power switch has been operated. Setting the flag and the unconfirmed flag to automatically invalidate all the validly set message flags corresponding to the messages other than the message indicated to be unconfirmed by all the messages and the unconfirmed flag. Message erasing means.

Here, the message flag area is, for example,
It corresponds to a memory area for storing a message number in an embodiment described later, and a message flag is, for example, invalid when the message number is 0 and valid when the message number corresponds to a number other than 0 in the embodiment described later. Is equivalent to the message No.

[Examples] Hereinafter, the present invention will be described with reference to examples.

FIG. 1 is a block diagram of a selective call radio receiver according to the present invention. A desired radio frequency is demodulated by a radio unit 2 including a discriminator via a built-in antenna 1 and converted into a rectangular wave by a waveform shaping circuit 3. And bit synchronization, frame synchronization, memory control, battery saving control,
When the call is confirmed by the decoder 5 which performs the call drive control and compares the data with the data from the P-ROM 4 in which the call number of the receiver is written with error control and judges whether the call has been made, an alarm is issued. A warning device 7 such as a buzzer, LED, or vibrator informs the user of the call via the drive circuit 6. The message data is stored in the memory 9 from the decoder 5 via the control unit 8. The stored message is sent to the LCD drive circuit 10 via the control unit 8 by the external operation member 12 composed of switches, and displayed on the 7-segment LCD display 13. A clock signal is sent from the crystal oscillation circuit 11 to the control unit 8 and the LCD drive circuit 10. The message processing unit 14 including the control unit 8, the memory 9, the LCD drive circuit 10, and the oscillation circuit 11 is configured by a one-chip microcomputer.

FIG. 2 is a detailed block diagram of the message processing unit 14. By connecting a crystal to the oscillation circuit (OSC) 20,
Generate system clock. A frequency dividing circuit (DIV) 21 frequency-divides the pulse from the oscillation circuit 20 to generate an LCD driving circuit (LCD).
D) Generating a reference signal for a frame frequency of 22 and a signal to a system clock generation circuit (SCG) 23 and the like. The system clock generation circuit 23 generates a system clock for controlling internal logic. The control circuit (CTC) 24 controls the internal logic based on the data in the program memory (ROM) 26 specified by the program counter (PC) 25. It also controls logic related to interrupt processing. The program counter 25 is a counter that specifies an address of the program memory 26. The program memory 26 stores a program to be executed, and outputs an instruction to be executed according to the address specified by the program counter 25. The stack register (STACK) 27 sequentially saves the contents of the program counter 25 every time a subroutine or an interrupt occurs. A data pointer (DP) 28 addresses a data memory (RAM) 29 at the time of a specific instruction. Data memory 29 used for storing data is 512
It is composed of a static RAM of an address (4-bit configuration). The accumulator (AC) 30 performs operations and transfers with other registers and data memories in combination with the logical operation unit (ALU) 31. The logical operation unit 31 performs a logical operation determined for each instruction. I / O port 32
The output port 33 exchanges data with the decoder. The input port 34 is connected to an external operation member such as a power switch. The data decoder (DD) 35 decodes data on the data bus according to a designated decoding function. The segment PLA circuit (SPLA) 36 is a circuit for appropriately combining display data according to the layout of the LCD panel. The LCD power supply circuit 37 creates a bias power supply necessary for the LCD drive circuit 22.

FIG. 3 is a configuration diagram of the memory contents of the data memory 29. In the data memory 29, one page is composed of 16 registers,
One bank consists of 16 pages. The number of banks is composed of two banks. That is, it is composed of 512 (2 × 16 × 16) addresses. The addresses (000H to 01FH) of pages 0 and 1 in bank 0 are temporary storage memories for message data. The first digit (head) of the message is at address 000H, the second digit of the message is at address 001H, the 16th digit of the message is at address 00FH, and the 17th of the message is at address 010H. Digit data,
--- At the address 013H, the 20th digit data of the message is stored. That is, messages can be stored up to 20 digits. The address 014H has a message number (No), the address 015H has protection (memory protection) that is not automatically erased, the address 016H has no reception confirmation after receiving, and the message has not been confirmed. Page 2 of Bank 1 from 2 (02
0H to 196H) are twelve message data memories, in which data storage similar to addresses 000H to 016H is repeated. Also, up to four of the twelve messages can be protected, and the message numbers are set in the order of 12, 11, 10, and 9.

The address (1AOH to 1ABH) of page A of bank 1 stores the state of twelve message memories. That is, there are three states: a state without a message, a state with a message, and a protected state (protect). Message 1 status at address 1A0H, message N at address 1A1H
The state of message No. 12 is stored in the state of o2, ---, address 1ABH. If there is at least one message, the address 1ACH (message presence flag) is set. Addresses 1B0H to 1BBH store unconfirmed states of 12 messages. Set to “1” when not confirmed.
Message 1 status at address 1B0H, address 1B1H
, The status of message No. 2 is stored, and the address 1BBH stores the status of message No. 12. If there is at least one unconfirmed message, the address 1BCH (unconfirmed flag) is set.

FIG. 4 is a flowchart from the reception of a message to the storage of message data in a data memory. When the message is received (step 40), the message data from the decoder is temporarily stored in addresses 000H to 013H of the data memory (step 41). Next, the message No. of the address 014H is set to 1 (step 42). The received message is registered as message No1. Next, the unconfirmed presence / absence data at address 016H is set to "1" (unconfirmed message) (step 43). Next, a duplicate message check for comparing and comparing the received message with the message in the memory is performed (step 44). If it is confirmed that the message data matches, the message No. of the address where the old message is stored is set to "0" (step 45).
That is, the old message is deleted. Next, the message number excluding the protected message before the duplicate message number is incremented by 1 (step 46). For example, if the duplicate message number is 3, the protected message number is 9 or more, the message No. 3 is set to No. 0, and the message Nos. 1 and 2 in the addresses 020H to 196H are No.
Changed to 2,3. If no coincidence of the message data is confirmed, all the message Nos except the protected message are incremented by 1 (step 47). For example, if two unprotected messages are stored before reception, message Nos. 1 and 2 in addresses 020H to 19FH are changed to Nos. 2 and 3. Then address 020H ~ 19
Check the empty space in FH (step 48). To check for empty space, search for "0" in the message No. MA of message No that is not protected if there is no empty space
The X value is searched, and this message No is set to "0" (step 49). That is, the oldest unprotected message is automatically deleted. Next message
The data at addresses 000H to 016H is stored in the No. "0" memory (step 50). Next, addresses 000H to 016H are initialized (step 51). Then, the statuses of up to 12 message memories at addresses 020H to 196H are stored at addresses 1A0H to 1A.
The process proceeds to the index set stored in CH and 1B0H to 1BCH (step 52).

FIG. 5 is a flow chart of the message deletion according to the present invention. Periodically sample the power switch. And when the power switch is ON or OFF, END
Proceed to (Step 74). When it is detected that the power switch has changed from ON to OFF (step 61), the message is erased and the bank is set to 0 and the page is set to 3 (step 61). Next, set the address to R4 (Step 6
2). Then, it is checked whether the message No. is "0" (step 63). And when the message No = 0, step
Go to 70. If the message number is not 0, the address is incremented by 1 (step 65). Then, it is checked whether the message is a protected message (step 65). When protected, go to step 70 to check for the next message. If it is not protected, the address is incremented by one (step 66), and it is checked whether it is an unconfirmed message (step 67). If it is an unconfirmed message, go to step 70 to check the next message. When not an unconfirmed message,
The address is set to R4 again (step 68). Then, the message No. is set to "0" (step 69). message
By setting No to “0”, one message is deleted. Next, check for the following message:
The page is incremented by 2 (step 70). Next, bank = 1,
It is checked whether page = B (steps 71 and 72). This is to confirm whether all the memories storing the messages have been checked. If bank = 1 and page = B are not satisfied, the process proceeds to step 62 again to perform the same processing. When the erasure of the message is completed, the process proceeds to the organization of the message Nos (step 73) in which the message Nos which have been omitted due to the message erasure are arranged in order from “1”.

FIG. 6 is a flow chart for canceling the unconfirmed message by stopping the sound. The alarm means sounds for 8 seconds after receiving the message. During this time, if there is a switch input from the user to stop the alarm (step 81),
It is checked that a sound is being produced (step 82). If it is sounding, set the address to R6 (step 8
3). Then, this address is set to "0" (step 84). That is, the unconfirmed state is released. Then, the process proceeds to END (step 85). When there is no switch input during the sounding, the process also proceeds to END (step 84).

FIG. 7 is a flowchart of unconfirmed release by reading a message. When the message is read from the memory stored by the switch (step 91),
First, the stored bank and page are set (step 92). Next, it is set to address R6 (step 9
3). Then, this address is set to "0" (step 94). That is, the unconfirmed state is released. Then, the process proceeds to a message display for displaying a message (step 95). If there is no message read operation, the process proceeds to END (step 96).

FIG. 8 is a flowchart of a message No. arrangement in which message Nos. Which are missing due to message deletion are arranged in order from “1”. First, it is checked whether there is a message in the memory of addresses 020H to 196H (step 10).
0). The checking method checks whether a value other than “0” is stored in the address where the message number is stored. If there is no message, the process proceeds to END (step 113). If there is a message, it is checked whether the message is further protected (step 101). If all messages are protected, proceed to END (step 11).
3). If there is an unprotected message, it is checked whether there is a message No1 (step 102). If there is no message No1, exclude protect and No0
No is decremented by one (step 103). Then check again whether there is No1. If No1 exists, it is next checked whether No2 exists (step 104). If there is no No2, the value of No except for the protect and No2 other than No2 is decremented by one (step 105). The same applies to No. 8 below (steps 106, 107,
−−−). When the processing up to No. 8 is completed, it is checked whether No. 9 is present (step 108). If there is no No9,
The value of “No” except for the protection and No. 9 or less is decremented by 1 (step 109). If No. 9 exists, it is checked whether it is protected (step 110). E for protect
Proceed to ND (step 113). If it is not protected, it is checked whether there is No10 (step 111). The following processing is the same as that of No9. Then, it is checked whether No12 exists (step 112). And regardless of this result E
Proceed to ND (step 113). That is, when the process of No. 11 ends, END is set. The maximum number of messages that can be protected is 4, and the number of the first protected message is
Becomes 12, and is set in the order of 11, 10, and 9 in the following. Therefore, if No. 9 is protected, it is natural that No. No. 10 or more is protected.

When it is desired to delete a protected message, the protection can be canceled and the message can be similarly deleted.

In the embodiment, the message is deleted when the power switch is turned off. However, the present invention is not limited to this. For example, the message may be deleted when the power switch is turned on. The embodiment described here is only one embodiment.

[Effect of the Invention] As described above, according to the present invention, the power switch is turned on.
Alternatively, the unnecessary messages are automatically erased when turned off, so that there is no need to provide a message erasing switch, and it is possible to eliminate the trouble of erasing each message one by one.

[Brief description of the drawings]

FIG. 1 is a block diagram of a selective call radio receiver according to the present invention. FIG. 2 is a detailed block diagram of a message processing unit. FIG. 3 is a configuration diagram of memory contents of a data memory. FIG. 4 is a flowchart of a program for storing message data. FIG. 5 is a flowchart of a message erasing program. FIG. 6 is a flow chart of a program for canceling unconfirmed message confirmation by stopping sound. FIG. 7 is a flowchart of a program for unconfirmed release of a message by reading a message. FIG. 8 is a flowchart of organizing message numbers in which message numbers that are missing due to message deletion are arranged in order from “1”. 8 Control unit 9 Data memory 10 LCD drive circuit 13 Display unit 14 Message processing unit

Claims (1)

(57) [Claims] A plurality of message areas for storing a received message; and a plurality of protect flags for storing, for each message, a protect flag indicating whether or not the message stored in the message area is protected. An area, a plurality of unconfirmed flag areas for storing, for each message, an unconfirmed flag indicating whether the message has been confirmed by the user, and a message flag indicating whether the information stored in the message area is valid A message flag area for storing the message for each of the message areas, wherein the memory means is configured so that data is not erased even when a power switch is turned off, and the message flag is invalidated for a newly received message. Message storage means for storing in the message area; Power switch determining means for determining whether a power switch has been operated; and when the power switch determining means determines that the power switch has been operated, the protect flag and the unconfirmed flag are included in all the messages. And automatically confirming all the validly set message flags corresponding to the message other than the message protected by the protect flag and the message indicated to be unconfirmed by the unconfirmed flag. A selective call radio receiver, comprising: a message erasing means for setting the message to invalid.