| 基于I^2C的OSD显示驱动设计与实现 |
| |
| 引用本文： | 朱键,张哲. 基于I^2C的OSD显示驱动设计与实现[J]. 现代电子技术, 2008, 31(21) |
| |
| 作者姓名： | 朱键 张哲 |
| |
| 作者单位： | 东南大学,国家专用集成电路系统工程中心,江苏南京,210096 |
| |
| 摘 要： | OSD在车载导航设备中有广泛的应用。设计基于Windows CE 5.0操作系统,PXA270处理器系统平台,采用TerawinsT128芯片处理OSD,处理器通过I2C总线与T128通信,完成对OSD写和擦除的操作。这种处理方案针对多源视频信号,所有视频信号由T128处理,再由T128产生OSD,方便对所有视频源信号的OSD叠加。把一部分原先需要CPU处理的视频任务由T128完成,有效降低CPU的负荷。实验结果表明该方案有效、迅速、可行。
|
| 关 键 词： | 嵌入式系统 I2C T128 OSD 驱动 |
Design and Realization of OSD Driver Based on I2C BUS |
| |
| ZHU Jian,ZHANG Zhe. Design and Realization of OSD Driver Based on I2C BUS[J]. Modern Electronic Technique, 2008, 31(21) |
| |
| Authors: | ZHU Jian ZHANG Zhe |
| |
| Abstract: | OSD(On Screen Display) is widely used in vehicle navigation.This designation on the basis of PXA270 processor and WinCE operating system selects TerawinsT128 to communicate with CPU through I2C bus.The T128 driver which writes and erases OSD by communication with CPU controls the operation of the T128 as a peripheral of I2C.This kind of solution aims at multi-source video signal.All video signals are handled by T128 to produce OSD which could be overlapped conveniently.T128 takes over the videos handling,which are finished by CPU originally,and it can reduce the CPU overload effectively.Experimental results prove that this solution is effective,rapid and doable. |
| |
| Keywords: | embedded system I2C T128 OSD driver |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
