Design Of Smart Real-Time Monitoring System Based On ARM And UC/Os-?

Traditional monitoring is through the camera on the analog signal collection,again by a special cable,optical fiber transmission to the display device.This way the primary disadvantage is that the video signal resolution is poor.Later,the use of a more professional image acquisition chip,higher compression transmission efficiency requirements costs have risen sharply.To solve these problems,on the basis of a large number of experiments,this paper adopted in recent years popular ARM micro controller and multitasking real-time operating system uC/OS-?,made a high reliability and good real-time intelligent monitoring system.In this paper,I designed a small intelligent real-time monitoring system,suitable for residential,office and other places of illicit is close.This system to select the samsung product S3C2440 as control core,the image sensor OV9650 used to collect data,LCD screen is TQ043TSCM-V,alarm information sending device selection is huawei GTM900-B module(GSM),choose SDHC memory CARDS as long-term data storage medium.Work has been done in software mainly uC/OS-? transplantation and each module of the application of the operating system to write.Based on uC/OS-? during the program design,use of task oriented programming method,the underlying program related to hardware packaging into API function,implements the system of modularization and hardware independence.System debugging,running well and respond to emergencies quickly,task switching between flowing smoothly.In this paper,the main innovations include:1.According to the traditional monitoring systems require a lot of physical storage space,and the scene image when looking for unusual and view the complicated problem of data storage,this paper proposes a first by the infrared sensor to detect anomalies,then wake up the system of the field data collection and preservation,the new approach not only can greatly save storage space,also can to a large extent,alleviate the scene of people looking for unusual image of work.2.Make full use of GSM network.When the exception occurs,GSM alarm module is activated,and in a timely manner to transmit the emergency to the user's mobile phone,even if the user in the thousands of miles away,can also knew all about the safety status of private places.3.The optimized S3C2440 startup code.Because this system program is designed to have been running a 32-bit ARM instruction set,so don't select the instruction set judgment in the bootstrap;Will not involve in the design of this interruption blocking(directly in the interrupt lookup table not assigns physical address),the CPU will reduce the computational complexity in query interrupt type.These two aspects of optimization,shorten the start-up time of the system,and make it has better real-time performance.4.Make full use of the DMA architecture of S3C2440 chip,image sensor OV9650 in the transmission of data to the memory and the data represented by the image displayed on the LCD when don't need a CPU,thus the CPU is free at this time,just can be used to write data to the SDHC.That is,the LCD display OV9650 Transported to the collected images and the images in the SDHC was conducted at the same time,reduced the demand for memory resources program.