【摘要】：在科技高度發(fā)達的今天，各式各樣的的現(xiàn)代化電子產(chǎn)品正在改變著我們的生活和工作方式，為了實現(xiàn)操控更加簡單方便，更更具有智能人性化，它們必須提供用戶豐富的操作界面，簡便的功能控鍵，清晰的運行狀態(tài)，以及友好的提示信息等，這些功能正是由OSD（On Screen Display）系統(tǒng)來控制完成。OSD控制系統(tǒng)是目前電子產(chǎn)品中非常常見的控制電路，，應(yīng)用非常廣泛，因此在電路的設(shè)計上提出了更高的要求：低成本，小體積，少功耗，多功能，易控制等。 本論文針對以上要求，提出了一種全新的設(shè)計架構(gòu)來提高OSD控制器的性能，進而更好地服務(wù)于高品質(zhì)的電子產(chǎn)品。主要采用以下幾方面的技術(shù)： 1.軟件和硬件協(xié)同運作，這樣既能利用軟件的操作方便、修改靈活等優(yōu)點，又能利用硬件的運行速度快等優(yōu)點，二者有機結(jié)合，從而提高OSD控制器的工作效率。 2.多區(qū)塊數(shù)據(jù)鏈表存儲和訪問，它能夠動態(tài)地分配存儲空間和存儲順序，用戶可以通過軟件對每個OSD塊進行修改，易于操作，控制方便。另外存儲器中只需要放置每個區(qū)塊的有效數(shù)據(jù)，無需整個顯示畫面的數(shù)據(jù)，因此極大地提高了存儲器空間的利用率，同時減少了系統(tǒng)帶寬需求。 3.使用彩色索引技術(shù)，OSD圖像數(shù)據(jù)是利用索引值通過查詢顏色查找表而取得，這樣在滿足系統(tǒng)畫質(zhì)的要求下，可以減少了系統(tǒng)的存儲空間和帶寬的需求，另外該技術(shù)容易調(diào)整圖像的顏色，軟件只需要更改數(shù)據(jù)量較小的顏色查找表，而無需對比較龐大的OSD數(shù)據(jù)塊做修改，控制方便簡單。 4.采用門控時鐘來降低動態(tài)功耗，使用了功能和非功能相結(jié)合的使能控制，采用了多級門控時鐘設(shè)計、運用了主動式和被動式相結(jié)合的設(shè)計理念，極大地降低了OSD控制器的功耗。 本文在研究設(shè)計過程中，首先將OSD功能從軟件和硬件實現(xiàn)上做了明確劃分，并對硬件部分提出了設(shè)計功能需求，制定實現(xiàn)架構(gòu)。然后利用高級語言進行軟件建模，完成性能評估后，進行硬件設(shè)計，使用VerilogHDL進行編寫RTL代碼。最后使用高級驗證方法學(xué)OVM進行功能仿真，同時將該模塊整合到系統(tǒng)中，通過FPGA進行驗證。經(jīng)過全面的測試和驗證，證實了OSD控制器符合預(yù)期目標(biāo)。
[Abstract]:In today's highly developed science and technology, a variety of modern electronic products are changing the way we live and work, in order to achieve more simple and convenient manipulation, more intelligent and humane. They must provide a rich user interface, simple function keys, clear running status, and friendly prompts, etc. These functions are controlled by OSD (On Screen Display) system. OSD control system is a very common control circuit in electronic products, and is widely used. Therefore, the design of the circuit has put forward higher requirements: low cost, small volume, Low power consumption, multi-function, easy to control, etc. In order to improve the performance of OSD controller, this paper proposes a new design framework to better serve the high quality electronic products. Mainly adopt the following aspects of technology: 1. The cooperation of software and hardware can not only make use of the advantages of convenient operation and flexible modification of software, but also make use of the advantages of fast speed of hardware, so that the efficiency of OSD controller can be improved. 2. Multi-block data linked list is stored and accessed, which can dynamically allocate storage space and storage order. Users can modify each OSD block through software, which is easy to operate and control. In addition, only the effective data of each block is placed in the memory, and the data of the entire display screen is not required. Therefore, the utilization of memory space is greatly improved and the system bandwidth requirement is reduced. 3. Using color index technology, OSD image data is obtained by querying the color lookup table, which can reduce the requirement of storage space and bandwidth of the system under the requirement of system picture quality. In addition, the technique is easy to adjust the color of the image. The software only needs to change the color lookup table with small amount of data, without modifying the relatively large OSD data block, so the control is convenient and simple. 4. The gating clock is used to reduce the dynamic power consumption, the functional and non-functional enabling control is used, the multi-stage gated clock is designed, and the design concept of the combination of active and passive is used, which greatly reduces the power consumption of the OSD controller. In the course of the research and design, the OSD function is divided clearly from the software and the hardware implementation, and the design function requirement of the hardware part is put forward, and the implementation framework is established. Then the software is modeled with high-level language. After performance evaluation, the hardware is designed and the RTL code is written with VerilogHDL. Finally, the advanced verification methodology (OVM) is used for functional simulation, and the module is integrated into the system and verified by FPGA. After a comprehensive test and verification, it is confirmed that the OSD controller meets the expected objectives.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TP332

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