CN1026526C - Chinese character or graph generating device at interface of printer - Google Patents

Abstract

The present invention relates to a Chinese character or graph generating device at a printer port. The present invention adopt module design, can be arranged on the computer printer port in flexibly selected external connection modes without changing an original personal computer or a printer, and than can be connected with a parallel interface of the printer. The personal computer can uses a control and state signal and a data bus which is arranged on the printer port for transferring character font data, character font desired data is generated through the processing of the present invention, various corresponding character font or pattern descriptive data is read through the printer port, and then, application treatment is carried out. The personal computer can also select that the data transferred by the control signal and the data bus arranged on the printer port can be directly printed by the printer without the influence on the original functions of the personal computer and the printer.

Description

Chinese character or graph generating device at interface of printer

The present invention relates to a kind of Chinese font or graph generating device, particularly a kind ofly utilize outer add mode to place Chinese font or graph generating device on the printer port between PC and the printer.

PC is universal day by day, has become indispensable instrument in the daily life, because its superior processing capacity and arithmetic speed, and very popular, and the wide model of quilt is used for various professional domains; The corresponding quality requirements strictness day by day that also makes people to PC, wherein the quality requirements to Chinese type also is like this, again since in the past the Chinese font data of people's computer all be stored in the hard disc of host computer, be subjected to the restriction of capacity, it is fixed size that single font (as phaneroplasm or regular script) and its font only can be provided usually, if palpus amplifies a little or dwindles the then obvious variation of its quality, so existence can't be satisfied requirement and the processing speed very slow shortcoming of people to multiple font and quality.

Though, propose a kind of font generation card and remedied above-mentioned shortcoming, but this kind font card must directly be installed on computer inside, usually can only be applicable to the PC of some label, and can't be applicable to that the computer of other labels and its installation and maintenance job all need the professional just can carry out, very inconvenient, so can't generally be accepted by the people always, especially portable or on knee or notebook type PC, because of its complex structure, the inner space is limited, can't use the font card at all, therefore, for becoming the on knee of rising star or notebook type computer, the demand of high-quality and multiple font is difficult to be satisfied.

The present invention aims to provide a kind of PC or workstation applicable to various labels, and be easy to install, maintenance, and can supply multiple font and raising speed, the generation device of quality, Chinese font or graph generating device on a kind of printer port promptly are provided, this device adopts modular design, do not need to change former PC or printer, can select outer add mode neatly, be installed on the printer port of PC and be connected with the printer parallel interface again, PC can be utilized the data bus on the printer port, control signal and status signal, transmitting each font data installs to this, handle via this device, PC reads corresponding various font or pattern description data via printer port again, do other again and use processing, PC also can be selected data bus on its printer port and data that control signal transmitted directly to be gone out by printer prints and not influence PC and the original function of printer, make this device and bring into play the greatest benefit, more make this device become unique scheme that on knee or notebook type PC solves above-mentioned shortcoming except overcoming above-mentioned shortcoming.

For further understanding the object of the invention and technology contents thereof, the spy describes a preferred embodiment conjunction with figs. in detail, in the accompanying drawing:

Fig. 1 is Chinese font or graph generating device connection diagram between between PC and printer on the printer port of the present invention; And

Fig. 2 is the system architecture calcspar of this device.

Consult the Chinese font or the connection diagram of graph generating device between PC and printer of printer port of the present invention shown in Figure 1, wherein the front end of this device 2 is established a D type breakout box 21, can directly be connected on the printer port 11 on PC 1 main frame, and can utilize the screw 23 on its both sides, 23 ' fixed, a D type breakout box 22 is also established in its rear end, can be connected with the extended line 31 of printer 3, when requiring various fonts or figure, can send instruction input this device 2 by PC 1, this device 2 is promptly according to the font in the received instruction, data such as font size and variation, produce raster font or describe the required data of its housing word, promptly deliver to PC 1 after having produced, PC 1 remakes other and uses processing, and need not need not take off when this device is handled data this device 2 in PC, PC 1 can directly be used printer 3 by device 2; So this device 2 adopts modular design, need not change any equipment of former PC 1 or printer 3, and can select outer add mode neatly, its volume space is at any time extendible and unrestricted, except solving above-mentioned drawbacks common, on economic benefit, more can bring into play greatest benefit.

Consult the system architecture calcspar of this device shown in Figure 2, wherein this device 2 comprises an input buffer U1, and this impact damper U1 waits for that in order to store the data of being delivered to this device 2 by personal computer printer port one 1 CPU (central processing unit) U11 reads; One data register U2, this register U2 temporarily stores the input data, to treat further processing; One comparer U3, this comparer U3 converts sixteen bit to eight; One interrupts and flag generator U4, this generator U4 produces interruption and flag is given CPU (central processing unit) U11, state with expression input buffer U1, one output data push-up storage U5, this storer U5 is used to store the data that this device 2 is produced, to treat that PC 1 reads, owing to be push-up storage, so PC 1 can read in regular turn, one printer port status signal arbitration device U6, the status signal of this moderator U6 control printer port, and determine these signals to provide or provide by printer parallel interface CN2 by CPU (central processing unit) U11, one external memory address generator U7, this generator U7 provides external memory storage required address, and can external mass storage, one printer port control signal moderator U8, the control signal of this moderator U8 control printer port 1, make it to turn to this device 2 or directly output to printer parallel interface CN2, one external memory storage U9, the font data of description of this storer U9 storage area Chinese font or figure, and need not to deliver to this device 2 by PC 1, improve function and speed with the number of times that reduces the data contact, this storer can be random access device (RAM) or ROM (read-only memory) (ROM), one logic controller U10, this controller U10 controls various circuit sequences, make an entire circuit normal operation and a CPU (central processing unit) U11(CPU) constitute, this unit U11 is the control center of this device 2, may command, read, produce and export various data and signal, and main pulse (Time Base clock) is supplied with its generation work when being produced by crystal oscillator T1, and interconnect the transmission data by the printer port interface of PC 1 and parallel interface CN2 and this device 2 of printer 3, its motion flow is as follows:

This device 2 is after the power supply starting, after carrying out self-test, promptly constantly detect the control signal of printer interface interface CN1, transmit 2 of data, this device with printer 3 data bus and control signal that CN1 sent here are sent to CN2 if the state of this control signal is a desire, become the control signal of printer 3 and data and the status signal of printer 3 CN2 that delivers to is sent to CN1, make that the data transmission between PC 1 and the printer 3 is had no effect; When if the control signal that this device 2 detects the printing interface CN1 of PC does not really want to transmit data with printer 3,2 in this device cuts off each signal wire between CN1 and CN2, this device 2 then can receive data at any time for ready state, PC 1 is passed through the data of corresponding Chinese sign indicating number and font requirement D0-D7 input buffer U1 and the data register U2 of printer port CN1 then, and start comparer U3 simultaneously and change into sixteen bit by eight with specified data, it is ready with notice CPU (central processing unit) U11 input data promptly to start interruption and flag generator U4 after converting, this moment, CPU (central processing unit) U11 promptly carried out the storer that the data input subroutine is put into the data that have input buffer U1 CPU (central processing unit) U11, and allow PC 1 to send second batch data, when CPU (central processing unit) U11 is obtained relevant Chinese sign indicating number and font related data by input buffer U1 after, judge earlier that font produces required data and whether has been stored among the external memory storage U9 of this device 2, if there has been the address of promptly sending external memory storage among the external memory storage U9 according to data, (by external memory address generator U7), produce required data and obtain corresponding font, if producing the required data of font is not stored among the external memory storage U9, then the font that must obtain by CN1 again produces required data and is calculated by algorithm and formula in CPU (central processing unit) U11 inside, to obtain the font that people are wished to get, this word may amplify, dwindle, italic ... font such as phaneroplasm, regular script, be subordinate to, circle, black matrix ... or the like, and can do suitable blacking (also can carry out) then by PC 1, CPU (central processing unit) U11 promptly delivers to data push-up storage U5 to these data, data are read away (reading away the status signal of action) to wait for PC 1 by computer printer end interface CN1, after PC 1 is read data, can do further desk-top publishing, the computer brief report system ... Deng further processing.

In sum, Chinese font or graph generating device on a kind of printer port, this device adopts modular design, do not need to change former PC or printer, can select outer add mode neatly, be installed on the printer interface of PC and be connected with the parallel interface of printer again, PC can be utilized the data bus on the printer port, control signal and status signal, transmit of the processing of each font data via this device, read back corresponding various font or pattern description data again, remaking various application handles, make this device except overcoming common shortcoming, performance greatest benefit place more makes this device become unique scheme that on knee or notebook type PC overcomes its shortcoming, has very big using value.The above description of drawings only is preferred embodiment of the present invention, is not in order to restriction the present invention, this area professional person, in the described shape of claims, structure, feature and spiritual scope, the enforcement of remodeling, the variation etc. done all should be included in the claim scope of the present invention.

Claims (6)

1, Chinese font or the graph generating device on a kind of printer port is characterized in that:

Adopt modular design, but elasticity is selected outer add mode, be connected between the parallel interface of the printer port of PC and printer, this device includes:

One CPU (central processing unit), this unit be as the control center of this device, may command, reads, produces and export various data and signal;

One impact damper, the data that this buffer stores PC is sent here, and wait for that CPU (central processing unit) reads;

One data register, this register is temporarily stored the data that PC is sent here, and products for further is handled;

One comparer, the eight bit data that this comparer is sent data register here converts the sixteen bit data to;

One interrupts and the flag generator, the data that this generator is sent here according to comparer, and generation is interrupted and flag is given CPU (central processing unit), state in order to the expression input buffer, CPU (central processing unit) promptly was interrupted and carried out the data input subroutine this moment, and the data that have impact damper are put into the storer of CPU (central processing unit) and allowed PC to send second batch data;

One printer port status signal arbitration device, the status signal of this moderator control print.er port, and determine these signals to provide by CPU (central processing unit) or provide by the parallel interface of printer;

One printer port control signal moderator, the control signal of this moderator control printer port makes it to turn to this device or directly exports the parallel interface of printer to;

One external memory address generator, this generator provide external memory storage required address;

One external memory storage, this external memory storage is after the central processing unit unit is read by impact damper relevant Chinese code word type related data, promptly according to these data and by the external memory address generator, export the address of external memory storage and obtain the required data of the corresponding font of generation, and utilize the algorithm of CPU (central processing unit) inherence and formula to calculate the font of being wished to get;

One data push-up storage, this memory stores by CPU (central processing unit) and is sent the font data of desiring to be defeated by PC, and the wait PC is read away data successively; And

One logic controller, this controller is controlled the sequential of each circuit, makes the entire circuit operate as normal.

2, Chinese font or the graph generating device on the printer port as claimed in claim 1, it is characterized in that: this CPU (central processing unit) internal storage burning stores the algorithm and the formula of various fonts, and algorithm and formula calculate and produce desired font in view of the above.

3, Chinese font or the graph generating device on the printer port as claimed in claim 1, it is characterized in that: this external memory storage internal memory contains corresponding font data of description, reduce data transmission number of times between individual circuit and this device, thereby improve function and speed.

4, Chinese font or the graph generating device on the printer port as claimed in claim 3, it is characterized in that: this external memory storage can be in random access memory, the ROM (read-only memory) any, and can expand according to need and in addition.

5, Chinese font or the graph generating device on the printer port as claimed in claim 1, it is characterized in that: this device is utilized data bus, control signal and the status signal of printer port by PC, transmit of the processing of each font data via this device, read back corresponding various font data of description again, remake other and use processing.

6, Chinese font or the graph generating device on the printer port as claimed in claim 1, it is characterized in that: the connecting interface between this device and PC and printer can be any interface.