CN202573320U - Driving module of parallel port printer - Google Patents
Driving module of parallel port printer Download PDFInfo
- Publication number
- CN202573320U CN202573320U CN 201220193981 CN201220193981U CN202573320U CN 202573320 U CN202573320 U CN 202573320U CN 201220193981 CN201220193981 CN 201220193981 CN 201220193981 U CN201220193981 U CN 201220193981U CN 202573320 U CN202573320 U CN 202573320U
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- CN
- China
- Prior art keywords
- parallel port
- printer
- pld
- port printer
- driver module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a driving module of a parallel port printer. The driving module of the parallel port printer comprises a processor and a programmable logic device. The programmable logic device is connected with processor. The programmable logic device is connected with the parallel port printer. Compared with the prior art, the driving module of the parallel port printer not only saves the cost and solves the problem of difficulty in purchasing, but also effectively releases the IO resource of a CPU, and has good flexibility.
Description
Technical field
The utility model relates to printer patient monitor field, exactly is meant the driver module of a kind of parallel port printer.
Background technology
At present, the implementation method of embedded main board machine printer driver module mainly contains following two kinds: 1, realize the control to the parallel port printer through the parallel port conversion chip; 2, the IO port simulation through CPU realizes the control to the parallel port printer.More than two kinds of methods all have certain shortcoming.Shortcoming in the said method one mainly shows: this parallel port conversion chip price is high at present, and is difficult for buying; Shortcoming in the said method two mainly shows: it has taken the IO resource of CPU largely, and this loses more than gain for complicated embedded system, influences the application of printer.
The utility model content
To above-mentioned defective, the technical problem that the utility model solves is to provide the driver module of a kind of parallel port printer, has not only provided cost savings, solved the difficult problem of buying, and has effectively discharged the IO resource of CPU, has good flexibility.
In order to solve above technical problem, the driver module of the parallel port printer that the utility model provides comprises processor and PLD, and said PLD is connected with said processor, and said PLD is connected with the parallel port printer.
Preferably, said PLD is connected with said processor through bus.
Preferably, said PLD is connected with said parallel port printer through the IO control line.
Preferably, said PLD is a CPLD.
Preferably, said PLD is a field programmable gate array.
Preferably, it is arranged in the embedded main board machine of parallel port printer.
The driver module of the parallel port printer that the utility model provides comprises processor and PLD, and said PLD is connected with said processor, and said PLD is connected with the parallel port printer.The flow process of driver module when work is following: 1, begin to start driver module; 2, earlier by the PLD program initialization; 3, parallel port printer initialization then; 4, read the state of parallel port printer again by processor; 5, accomplish initialization.Compared with prior art, the driver module of the parallel port printer that the utility model provides has not only provided cost savings, has solved the difficult problem of buying, and has effectively discharged the IO resource of CPU, has good flexibility.
Description of drawings
Fig. 1 is the modular structure figure of the driver module of parallel port printer among the utility model embodiment;
Fig. 2 is the workflow diagram of the driver module of parallel port printer among the utility model embodiment.
The specific embodiment
For the technical scheme that those skilled in the art can understand the utility model better and provided, set forth below in conjunction with specific embodiment.
See also Fig. 1 and Fig. 2, Fig. 1 is the modular structure figure of the driver module of parallel port printer among the utility model embodiment; Fig. 2 is the workflow diagram of the driver module of parallel port printer among the utility model embodiment.
The driver module of the parallel port printer that the utility model embodiment provides; Comprise processor 1 and PLD 2; PLD 2 is connected with processor 1, and PLD 2 is connected with parallel port printer 3, and PLD 2 is CPLD (CPLD).The drive module setting of parallel port printer is in the embedded main board machine of parallel port printer 3.
PLD 2 is connected with processor 1 through bus, and processor 1 can be programmed to PLD 2, and promptly PLD 2 can carry out information interaction with processor 1.
PLD 2 is connected with parallel port printer 3 through the IO control line, thereby can effectively control the duty of parallel port printer 3.
PLD 2 produces as a kind of universal integrated circuit, and its logic function is confirmed device programming according to the user.The integrated level of general PLD 2 is very high, is enough to satisfy the needs of the general digital display circuit of design.So just can by the designer programme voluntarily and a digital display circuit " integrated " on a slice PLD 2, and needn't go for chip maker design and make special-purpose IC chip.
The flow process of driver module when work is following: 1, begin to start driver module; 2, earlier by the PLD program initialization; 3, parallel port printer initialization then; 4, read the state of parallel port printer again by processor; 5, accomplish initialization.
Compared with prior art, the driver module of the parallel port printer that the utility model provides has not only provided cost savings, has solved the difficult problem of buying, and has effectively discharged the IO resource of CPU, has good flexibility.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (6)
1. the driver module of a parallel port printer is characterized in that, comprises processor and PLD, and said PLD is connected with said processor, and said PLD is connected with the parallel port printer.
2. the driver module of parallel port according to claim 1 printer is characterized in that, said PLD is connected with said processor through bus.
3. the driver module of parallel port according to claim 2 printer is characterized in that, said PLD is connected with said parallel port printer through the IO control line.
4. the driver module of parallel port according to claim 1 printer is characterized in that, said PLD is a CPLD.
5. the driver module of parallel port according to claim 1 printer is characterized in that, said PLD is a field programmable gate array.
6. the driver module of parallel port according to claim 1 printer is characterized in that, it is arranged in the embedded main board machine of parallel port printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220193981 CN202573320U (en) | 2012-04-28 | 2012-04-28 | Driving module of parallel port printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220193981 CN202573320U (en) | 2012-04-28 | 2012-04-28 | Driving module of parallel port printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202573320U true CN202573320U (en) | 2012-12-05 |
Family
ID=47242766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220193981 Expired - Lifetime CN202573320U (en) | 2012-04-28 | 2012-04-28 | Driving module of parallel port printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202573320U (en) |
-
2012
- 2012-04-28 CN CN 201220193981 patent/CN202573320U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
|
| CX01 | Expiry of patent term |