JPH0580178B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wireless device having a normal mode and an adjustment mode, and is particularly intended to prevent the wireless device from remaining in the adjustment mode due to forgetting to return the changeover switch. be.

[Conventional technology]

In a PLL (phase lock loop) wireless device, the transmission (or reception) frequency can be set simply by adjusting the frequency division ratio N of the PLL. This adjustment is normally done before shipping. For example, as shown in FIG. 4, in a PLL wireless device in which the transmitting/receiving section 10 and the control section 20 are separated and various control signals CTL are exchanged between the two, a changeover switch 21 is provided on the control section 20 side. When switched to the adjustment state side, it becomes possible to set the frequency described above, for example, to write the frequency division ratio in an electrically rewritable ROM.

[Problem that the invention seeks to solve]

However, if the switch 21 is shipped without switching to the normal state after adjustment, the user will not be able to make a normal call, and the switch 21 is built in so that it cannot be easily operated by a general user. cause confusion.

[Means for solving problems]

The present invention attempts to solve the above-mentioned problems by incorporating a program that starts from the normal mode when the power is turned on, regardless of the state of the changeover switch. For this reason, the present invention provides a wireless device that includes a transmitting/receiving section, a control section that controls the transmitting/receiving section, and a changeover switch that takes two states, a normal state and an adjustment state, in which the control section controls the switch when the power is turned on. When the transmitter/receiver is set to the normal mode in which communication is possible regardless of the state, and then the switch is switched to the adjustment state, or once switched to the normal state and then further switched to the adjustment state, the transmitter/receiver is set to the frequency setting. The feature is that it can be set to an adjustment mode for

[Effect]

The mode instruction by the hardware changeover switch temporarily loses its meaning when the power is turned off, and the program is set up so that when the power is turned on again, the system will forcibly start from the normal mode. In order to restore the mode instruction of the changeover switch after the power is turned on, a flag is used to store whether or not the switch has been switched to the normal state.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and 22 is a CPU (central processing unit or microcomputer) that forms the core of the control section 20. As shown in FIG. This CPU 22 receives signals H and L from a changeover switch (SW) 21 that takes two states, a normal state and an adjustment state, and has a program shown in the flowchart of FIG. FIG. 3 shows this flowchart divided into steps.

The operation will be explained with reference to these figures. When the wireless device shown in Figure 1 is turned on, the CPU
22 turns off the switch state memory flag
Make it. And the switch (SW) 2 at that time
It is determined whether 1 is H (high), that is, the normal state, or L (low), that is, the adjusted state. If it is H, the above flag is turned on according to the flow, and the transmitting/receiving section is placed in a normal mode in which communication is possible. At this time, if it is L, follow the flow and leave the flag off to enter the normal mode. In any case, when the power is turned on, the transmitting/receiving section is placed in the normal mode regardless of the state of the changeover switch 21. The reason for determining the state of the changeover switch is to turn on the flag when it is H. When this flag is not turned on, the changeover switch 21
Since the function of the transmitter/receiver is stopped, the following second procedure is required to put the transmitter/receiver in the adjustment mode for frequency setting.

The first procedure is when SW21 is already at H level when the power is turned on. At this time, the flag is on due to the flow, so simply turning SW21 to L will set the adjustment mode depending on the flow. The second procedure is when SW21 is at L when the power is turned on. At this time, it is in normal mode depending on the flow, so please wait for a while.
Set SW21 to H, go through the flow, turn on the flag, and then switch SW2 again to enter the flow.
It is necessary to set 1 to L.

〔Effect of the invention〕

As described above, according to the present invention, the control section
By simply incorporating a simple program into the CPU, the power will always be turned on during actual use, even if the switch is left in the adjustment side. This has the advantage that the user does not need to be aware of the existence of the switch.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIGS. 2 and 3 are flowcharts showing the control program, and FIG. 4 is a block diagram showing an example of a conventional wireless device. In the figure, 10 is a transmitting/receiving section, 20 is a control section, 21 is a changeover switch, and 22 is a CPU.

Claims (1)

[Claims] 1. In a radio device including a transmitting/receiving section, a control section that controls the transmitting/receiving section, and a changeover switch that takes two states, a normal state and an adjustment state, the control section is configured to switch the switch when the power is turned on. When the transmitting/receiving section is set to the normal mode in which communication is possible regardless of the state of A wireless device characterized by being set in an adjustment mode for setting.