JPH03181249A - Data transmitting device - Google Patents

Abstract

PURPOSE:To secure a remote resetting operation despite the software runaway of a processing part by inputting a single output of a decoding part included in a reception part which detects the signals contained in a reception frame to a pulse generating part and detecting the signal of a control part to connect it to the reset input of the processing part. CONSTITUTION:A single output of a C decoding part 16 which detects a control part code, i.e., a remote reset command code contained in the reception frame data to be inputted is inputted to a pulse generating part 1. Then the output of the part 1 is connected to the reset input R of a processing part 8. Thus a control signal is outputted to control and reset a processing part 11 when the part 1 receives the reset command of the reception frame which is defined at a control part for signal format. Thus the reception frame is reset regardless of the soft processing of the part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data transmission device, and more particularly to a data transmission device with an improved reset method using received frame data input to the device.

[Conventional technology]

Conventionally, this type of data transmission device has a reception interface section 11, a reception buffer 12, a synchronization detection section 13, an FC8 verification section 14, an address detection section 15, and a C-lever 1 section, as shown in the block diagram of FIG. 16, a reception section 9 consisting of a reception control section 17, a transmission section 10, and a processing section 8A.

Now, when received frame data as shown in the data format of FIG. 2 is input to the receiving section 9, the synchronization flag F,
Each data of the address A, control section C, data section D, and frame check section FC8 is transmitted to the synchronization detection section 1.
3. Detected by address detection section 15, C lever 1 section 16, and FC3 detection section 15. Here, the reception detection section 17 generates and controls timing signals for data within each frame based on the detection signal of the synchronization detection section 13. Further, the data signal is sent to the processing section 8A via the reception buffer 12.

When remotely resetting the received frame data input here, use the data format control section C.
A reset command defined by .

[Problem to be solved by the invention]

In the conventional data transmission device described above, when the data transmission device is remotely reset, a reset command defined by the data format control section C is notified to the processing section 8A via the reception buffer 12, and the software of the processing section 8A is sent to the processing section 8A. Since this data transmission device is reset by processing, there is a drawback that remote reset is not possible if the software of the processing section 8A goes out of control.

[Means to solve the problem]

The data transmission device of the present invention includes a C decoding unit that detects a control unit C code that is a remote reset command code included in input received frame data;
In a data transmission device having a processing section which inputs a control signal of a decoding section and performs a reset operation by software processing, another control signal of the C decoding section is inputted and a reset control signal is sent to the processing section. It has a pulse generation section that sends out a pulse to a reset input terminal, and the processing section performs a reset operation independently of software processing based on the reset control signal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. The embodiment shown in FIG. 1 has a reception interface section 11, similar to the conventional example.
Reception buffer 12, synchronization detection section 13, FCS verification section 14
, an address detection section 15, a C-lever 1 section 16, and a reception control section 17, and a pulse generation section 1 is added in this embodiment to constitute the reception section 9. Further, the transmitting section 10 and the processing section 8 are located at the bottom of the tank. For example, a received frame consisting of a synchronization flag F, an address field A, a control field C, a data field, and a frame check sequence field FC3 shown in the data format of FIG.
A reception buffer 12 via a reception interface section 11,
Synchronization detection section 13, FC3 verification section 14, address detection section 1
5. FCS verification, address detection, and C decoding are performed under the control of the reception control section 17, which generates various timings based on the synchronization detection signal input to the C lever 1 section 16 and output from the synchronization detection section 13. Then, the selected received frame is transmitted to the processing unit 8 via the reception buffer 12. Also, one output of the C lever 1 section 16 is the pulse generator 1.
By connecting the output of this pulse generation section 1 to the reset manual R of the processing section 8, when the pulse generation section 1 receives a reset command for the received frame defined in the control section C of the signal format, a control signal is generated. It is output to control and reset the processing section 11. Therefore, it is reset regardless of the software processing of the processing section 8.

〔Effect of the invention〕

As explained above, the present invention inputs one output of the C decoding section in the receiving section that detects the signal in the received frame to the pulse generating section, detects the signal from the control section C, and resets the processing section manually R. This has the effect of allowing remote reset independent of the software processing of the processing unit. In particular, it is possible to perform a remote reset even when the software in the processing section is out of control.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a general data format diagram including this embodiment, and FIG. 3 is a block diagram of a conventional data transmission device. 1... Pulse generation section, 8, 8A... Processing section, 9...
- Receiving unit, 10... Transmitting unit, 11... Receiving interface unit, 12... Receiving buffer, 13... Synchronization detection unit, 14... FC3 verification unit, 15... Address detection unit, 16...Decoding section.

Claims (1)

[Claims] It has a C decoding section that detects a control section C code that is a remote reset command code included in the input received frame data, and a processing section that inputs the control signal of the C decoding section and performs a reset operation by software processing. The data transmission device includes a pulse generation unit that inputs another control signal of the C decoding unit and sends a reset control signal to a reset input terminal of the processing unit, and the processing unit controls the reset control signal. A data transmission device characterized in that a reset operation is performed by a signal independently of software processing.