مركز المدينة المنورة للعلم والهندسة
البحوث
سعادة المهندس/ عارف سمان حفظه الله
السلام عليكم ورحمة الله وبركاته أشكركم على رسالتكم الرقيقة، وقد سررت بموقعكم الرائع والطموح، وفيما يلي ملخص رسالة الماجستير التي تخصني في الهندسة الكهربائية والحاسبات، آمل إدراجه ضمن باب البحوث في موقعكم، واسأل الله لكم التوفيق والسداد أخوكم/ عصام عبدالقادر كوشك
A Microcontroller-Based Video Switcherxml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" />
Essam Abdulkader H. Koshak
ABSTRACT
A new tool is needed in the classroom that provides the sharing of screens from the teacher’s computer to the students’ screens and vice versa. The objective of this project is to design and implement a microcontroller-based video switcher. The desired video switcher is to be applied in a computer classroom video system that satisfies the need for a system to control several video switches. These video switches control the computer monitor’s video signals in a computer classroom to provide screen sharing between the instructor’s computer (station) and students’ computers.
The concerned screen sharing can be categorized in three different operating modes controlled by the teacher’s station. First, Individual Teaching (Stand-alone Mode): Every student sees his own screen. Second, Group Teaching (Learning Mode): Every student sees the teacher’s screen. Third, Evaluation and Testing Mode: The teacher sees selected student’s screen. The VGA PC video standard is the most widely used video standard and therefore it is considered in this project.
A better way to ensure flexibility of switching an array of inputs and outputs from the computer screens in the classroom is by using crosspoint switches. The VGA lines coming from a PC video adapter basically consists of five lines: red, green, blue and horizontal and vertical synchronizing signals. Since the VGA line consists of two groups, analog and digital, therefore two different types of crosspoint switches are utilized in this project. One being an analog (video) crosspoint switch for the RGB lines and the other is a digital crosspoint switch for the synchronizing lines. This thesis expounds on the methodical optimization of the design of the two crosspoint switches. These switches are implemented and controlled by a pre-defined program using a microcontroller for connecting and disconnecting these VGA lines.
The microcontroller sends programmed control signals to change the status of each switch in the switcher to achieve the desired operating mode based on commands issued from the keypad. The system is designed, implemented and tested to work with 5 PCs. It provides the three operating modes and can be upgraded for more PCs.
لمزيد من المعلومات : الرجاء الاتصال ب:
المهندس : عصام كوشك
بريد : e@koshak.net
موقع : http://koshak.net