Embedded Systems: A Contemporary Design ToolEmbedded Systems: A Contemporary Design ToolEmbedded Systems: A Contemporary Design ToolDesigning Embedded HardwareEmbedded Systems: Architecture, Programming and Design, 2nd EditionEmbedded Systems: Architecture, Programming and Design, 2nd EditionEmbedded Systems: Architecture, Programming and Design, 2nd EditionEmbedded Systems: Architecture, Programming and Design, 2nd EditionEmbedded Systems: Architecture, Programming and Design, 2nd EditionEmbedded Systems Architecture: A Comprehensive Guide for Engineers and Programmers (Embedded Technology)
The system is implemented with ATMEL microcontroller based hardware unit. In current industry there exists lot of variants of 8 bit microcontrollers of MCS-51 family. We have chosen AT89S52microcontroller as the features include
- 8 Bit CPU for implementing the controller block
- It has got 8 Kbytes of flash memory, used for storing the instructions
- It has got on chip UART module for communicating with GSM module using RS232 protocol.
- It has got In system programming(ISP) feature
A 16X2 Liquid crystal character display(LCD) will be used for displaying the data from the desired memory locations. The LCD is connected to PORT2 of the microcontroller.
A L293D voltage driver is interfaced to the microcontroller to drive the motor.
GSM is a digital mobile telephone system that is widely used because of its low power consumption and low cost feature. It is serially connected to the microcontroller via a line driver MAX232. GSM modem communicates using RS-232 protocol with the microcontroller. The RS-232 protocol is asynchronous serial communication protocol and works at the baud rate of 9600.
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