JPH0230636B2 - WAIYAADO * RIMOOTOKONTOROORUSOCHI - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a wired remote control device using a digital circuit or a microcomputer, and particularly relates to a wired remote control device that simplifies the hardware of the digital circuit or microcomputer itself compared to the number of modes to be identified, and This makes it possible to simplify the attached interface circuit and the software of the microcomputer. Examples of conventional wired remote control devices using microcomputers are shown in FIGS. 1a, b, and c. Here, 1 is an input circuit of the operation unit which is equipped with a plurality of switches for specifying operation modes and a decoder that converts the contents of the operated switches into digital data, and 2 is an input circuit for inputting data output from the input circuit 1. 3 is an electrical signal decomposition circuit that converts the transferred electrical signal into digital data;
4 converts the parallel digital data output from the input circuit 1 into serial digital data, and connects the serial/parallel interface circuit 5.
This is a parallel/serial interface circuit that outputs serial data in synchronization with the input clock. The serial/parallel interface circuit 5 is a circuit that converts serial data inputted from the parallel/serial interface circuit 4 back into parallel digital data;
is a microcomputer (or equivalent logic circuit). Next, the operation of the above conventional wired remote control device will be explained. Figure 1a shows a system that converts the contents of a switch on the operation panel into digital data of "1" and "0" and transfers the data in parallel through n data lines, 4 lines (n=4). When using data lines, only a maximum of 2 ⁴ = 16 modes can be transferred. That is, when trying to execute many modes, the number of connection codes increases. b converts the contents of the operating section into an electrical signal frequency or DC voltage, and then
The electrical signal is transferred to the control section, and the electrical signal conversion circuit 2 includes an FM modulation circuit or
A DA converter is used. This method has the disadvantage that it requires an electrical signal decomposition circuit (frequency detector or AD converter) 3 hardware on the signal receiving side (control section) to decompose the transferred electrical signal, and also requires a large number of In order to implement this mode, the hardware must become more complex. c converts the data from the operation section into serial data synchronized with the serial clock output from the control section and transfers it.The operation section requires a parallel/serial interface circuit 4, and the control section has the disadvantage that it requires a serial-parallel interface circuit 5 or equivalent microcomputer hardware and software. It also has the disadvantage that it requires an extra operation and a connection line to send a serial clock from the control section to the operation section, rather than unilaterally transferring data from the operation section to the control section. In addition, the above-mentioned Figure 1 a, b, c
In all three methods, unless the serial data is directly input to the microcomputer in method c above, the final input to the microcomputer in the control section is parallel digital data of "1" or "0". However, if a large number of modes are to be executed, the number of input ports (mode designation data) g must be increased. Note that in FIG. 1, h indicates an output port (control command). An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional example when executing a large number of modes, and to provide a wired remote control device that can be realized using a simple interface circuit and a conventional control microcomputer or equivalent logic circuit. It is about providing. Examples thereof will be described below with reference to the drawings. For convenience of explanation, an example using a 4-bit microcomputer will be shown here. In FIG. 2, 7 is an input circuit equivalent to input circuit 1 in FIG. 1, 8a, 8b, 8c, and 8d are frequency division switching circuits, and 9
is a reference oscillation circuit, and these constitute the operation section 21. 22 is a connection cord, 10 is a microcomputer that constitutes the control section 23, 1
1 is a controlled device. FIG. 3 shows possible signal forms of the reference clock output to line e of FIG. 2 and the rectangular wave data output to data lines a, b, c, . . .
The data lines a, b, c, and d in FIG. 2 are supplied with the reference clock or a rectangular wave obtained by dividing the frequency thereof, or logic voltages of "1" and "0" are used to determine the state of the switch of the operating section 21 in FIG. is output by The control section 23 shown in FIG. 2 consists of only the microcomputer 10 and does not require an interface circuit.
The microcomputer 10 performs sampling of input data, memory storage, mode determination, and output of control commands. FIG. 4 shows a flowchart of the software of the microcomputer 10. The memory is a RAM (random access memory) with a number of bits equivalent to the number of input ports of the microcomputer 10.
is used and is built into the microcomputer 10. Although a 4-bit RAM will be explained here, an example of the contents of the RAM at the end of the store is shown in the table below. The following table shows an example when data line a in FIG. 2 is not frequency-divided, b is frequency-divided by 2, C is frequency-divided by 1/3, and d is output with a logic "0" signal. At this time, input ports a to d of the microcomputer 10 are set to logic "1" as shown in FIG.
A signal of “0” is supplied. The microcomputer 10 has an internal clock generation source whose frequency and phase relationship are asynchronous with the signals supplied to the input ports. The following table shows the waveform in Figure 3 at addresses 1 to 1 in the figure above.
This is the content when the contents of the input ports are sequentially stored in the memory in the microcomputer at the time indicated by 3. In this example, the frequency is almost twice that of the fundamental wave a, but since it is asynchronous, addresses 8 and 8 in the above diagram
There are cases where the same state of the input port can be taken twice as shown in 9, and also, by sampling the change point of the data of the fundamental wave a and the 1/2 frequency b, as at the time of address 12, the data "1" ”, “0” become unstable, and a, b, c, d become “1”, “1”, as shown in the table.
It may be “0” or “0”. However, the microcomputer does not recognize data based on the values of "1" and "0" of the signals a to d at the time of address 12, but rather
Addresses 8, 9 and 1 in the table are used to judge the data based on the number of inversions of “1” and “0” for each data a to d.
Even if there is a situation where the signal entering the input port 2 and the data sampling clock of the microcomputer are asynchronous, there is no problem in determining the data. Therefore, the microcomputer does not need to synchronize the control clock with the supplied data, and is particularly effective in determining and processing data output from equipment that does not have a clock line for synchronous coupling. .

[Table] The operation of the microcomputer 10 shown in FIG. 2 will be described below based on the flowchart shown in FIG.
Loop 1 in the flowchart in Figure 4 is a series of loops that sequentially stores data input from input port i in RAM from address 0 to address N, and the time T ₁ to go around this loop is as shown in Figure 3. It must be less than 1/2 of the period t of the reference clock. The mode detection program shown in FIG. 4A scans the stored RAM contents bit by bit and counts how many times the bits are inverted. The time it takes to store from address 0 to address N in RAM is (N+1)T ₁ , so the number of inversions is 1/
In the case of a signal divided by m, it becomes (N+1)T ₁ × 2/mt, and if the number of N is set large enough, there will be a one-to-one correspondence between a certain range of inversions and m without overlapping.
By specifying the range on the program, it is possible to detect rectangular wave data without error. Logic "1" and logic "0" in FIG. 3 can be distinguished by whether the values of the same bit in the memory are all "1" or all "0". Loop 2 in the flowchart in Figure 4 is a mode confirmation loop, and in order to prevent malfunctions when the mode is switched in the middle of loop 1, it is confirmed that the same mode data has been input several times in a row. After confirmation, the second control command output in flowchart B in Figure 4 is activated.
A control command is output from output port j to the controlled device 11 shown in the figure. This control command is latched within the microcomputer 10, and the same control command continues to be output until the next control command output command arrives. If an n-bit microcomputer is used in the above operation, and the frequency dividing circuit is capable of frequency division up to 1/m, the number of modes that can be determined by the microcomputer is (m+2) ⁿ $4-bit microcomputer is used. Even if frequency division up to 1/3 (m=3) is possible, (3+2) ⁴ =625 types of modes can be selected. In other words, data is not determined based on the states of "1" and "0" at one time at input ports a to d of the microcomputer, but based on the number of inversions of "1" and "0" within a certain period of time. Therefore, the types of data that can be determined increases. For example, per port, logic "0", logic "1", fundamental wave, 1/2 frequency divided wave,
If 4 types of 1/3 frequency divided waves can be determined, 5 types of data can be obtained with 1 port, and if this is extended to n ports, 5 ⁿ types of distinguishable data can be obtained. are doing. As described above, according to the device of the present invention, the operating section is provided with the same number of frequency dividing circuits as the number of input bits of a microcomputer or an equivalent logic circuit, and one reference oscillation circuit, and the control section is equipped with Simply adding more memory to the number of RAM that makes it possible to determine the frequency division number of the circuit has the effect of greatly expanding the range of remote control, and is effective for systems that perform many operations remotely.

[Brief explanation of drawings]

FIGS. 1a, b, and c are block diagrams of essential parts for explaining a conventional wired remote control device, FIG. 2 is a block diagram of essential parts of an embodiment of the present invention, and FIG. Signal waveform diagram of each part,
FIG. 4 is a diagram showing an example of a flowchart of the microcomputer shown in FIG. 7... Input circuit, 8a to 8d... Frequency division switching circuit, 9
...Reference oscillation circuit, 10...Microcomputer,
11...Controlled device, 21...Operation unit, 22
...Connection cord, 23...Control section.

Claims (1)

[Claims] 1. A plurality of input circuits including a switch for specifying an operation mode and a decoder for converting the contents of the operated switch into digital data, a reference oscillation circuit, and outputs of the plurality of input circuits and After inputting the reference clock from the reference oscillation circuit and creating a plurality of frequency-divided waveforms, the plurality of frequency-divided waveforms and "1" and "0" signals of unchanging digital data are switched by the output of the decoder. An operating section is equipped with a plurality of bits of a frequency division switching circuit that outputs one bit of transmission data, and the plurality of bits of data transmitted from the plurality of frequency division switching circuits of the operating section is sampled, and the waveform data is kept constant. A wired wired wired device comprising: a memory for holding data for a period of time; and a control section comprising a microcomputer that determines the frequency of each divided waveform of a plurality of bits from the contents of the memory and creates a control command based on the frequency determination results.・Remote control device. 2. In the description of claim 1, the control section receives rectangular wave data whose frequency changes depending on the mode from a plurality of bus lines in parallel, and inputs the number of bits corresponding to the number of bus lines. The logic value "1" or "0" of data at each time is stored simultaneously in the memory with a fixed timing, and after a fixed number of stores are completed, the mode is identified by counting the number of times each bit is inverted. A wired remote control device comprising: