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Universal dot matrix liquid crystal display controller and its application software developing system

A liquid crystal display and control device technology, applied in program control devices, special data processing applications, digital output to display devices, etc., can solve problems such as limited degree of efficiency improvement, difficult parallel interfaces for microprocessors, and unsuitable mass use. , to achieve the effect of low cost, reduce data traffic, and facilitate mass use

Inactive Publication Date: 2007-09-05
杭州芯翼科技有限公司
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AI Technical Summary

Problems solved by technology

However, this solution increases the cost, so it is not suitable for large-scale use. In addition, because it is difficult to implement parallel interfaces between existing microprocessors, this solution is not suitable for occasions that require a large amount of data communication.
In short, this solution can solve the software interface uniformity problem of some dot-matrix liquid crystal display modules, but it cannot achieve true unity and increases the cost
[0007] In addition, there is no comprehensive consideration of design and simulation in the existing various schemes. Usually, the design results must be downloaded to the dot-matrix liquid crystal display module to view its effect in the real system, which has more display content. , When the relationship between the display pages is complex, the degree of efficiency improvement is very limited

Method used

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  • Universal dot matrix liquid crystal display controller and its application software developing system
  • Universal dot matrix liquid crystal display controller and its application software developing system
  • Universal dot matrix liquid crystal display controller and its application software developing system

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Embodiment Construction

[0026] Figure 2 shows a typical application of the universal dot-matrix liquid crystal display control device. The dot matrix liquid crystal display module 21 with data preset function is composed of a dot matrix liquid crystal display 211, a display data RAM 212, a general dot matrix liquid crystal display control device 31, a row and column drive device 33, a programmable read-only memory 35 and Chinese and English The whole character library consists of 36 characters. The hardware interface between the microprocessor 32 and the dot-matrix liquid crystal display module 21 is parallel or serial. Various information of the liquid crystal display page is pre-written in the programmable read-only memory 35 through the display control device 31, and the microprocessor 32 only needs to send few parameters to the general dot-matrix liquid crystal display control device 31 to make a large amount of display data Stored in the display data RAM 34. The data stored in the display data...

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Abstract

The universal dot matrix LCD controller is used various standard dot matrix LCD modules from 128x32 and 64x64 to 320x240 and supports the data presetting function and the complete Chinese and English character library, and its application software is convenient to computer aided design. The LCD controller consists of microprocessor kernel, interface part, drive control part and mask program. The interface part has separated data channel and command channel, and the data channel in stack structure has each unit mapped to the RAM address space inside the microprocessor kernel for fast parallel operation. The drive control part and the microprocessor kernel time-sharing complex the outer bus for continuous display.

Description

technical field [0001] The invention relates to a display control device, in particular to a general dot-matrix liquid crystal display control device, and to an application software development system of the display control device. Background technique [0002] The internal structure and external interface of the traditional dot-matrix liquid crystal display module are shown in Figure 1. The dot matrix liquid crystal display module 11 is composed of a dot matrix liquid crystal display screen 111 , a display data RAM 112 , a dot matrix liquid crystal display control device 113 and a row and column driving device 114 . Most of the display data of the dot-matrix liquid crystal display module 11 is operated and processed by the microprocessor 12 , and is directly or indirectly stored in the display data RAM 112 through the dot-matrix liquid crystal display control device 113 . The data stored in the display data random access memory 112 is sequentially sent by the dot-matrix li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06F9/455G06F3/14G06F13/00
Inventor 郑尊标张和平
Owner 杭州芯翼科技有限公司
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