The 8051 Microcontroller and Embedded Systems, Volume 1
Prentice Hall, 2000 - Digital control systems - 435 pages
For courses teaching the 8051 Microcontoller.
This book uses a step-by-step approach to teach the fundamentals of assembly language programming and interfacing of the 8051 microcontroller. It uses many examples to clarify concepts. Simple, concise examples are utilized to show what action each instruction performs, then a sample is provided to show its application. This text provides a comprehensive understanding of the internal organization of the 8051 registers and resources in a way that sheds the student's fear of assembly language. Whether students become designers of stand-alone systems or complex embedded systems, they will find this text a useful resource.
From inside the book
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READY : SETB P1.7 CLR P2.0 SETB P2.1 BACK : CLR SETB JB P2.2 P2.2 P1.7 , BACK ; make P1.7 input port ; RS = 0 access command reg ; R / W = 1 read command reg ; read command reg and check busy flag ; E = 1 for H - to - L pulse ; E = 0 H ...
Writing commands and data to LCD without checking busy flag ; Assume PA of 8255 connected to DO - D7 of LCD and ... 5X7 matrix ; write command to LCD ; wait before next issue ( 2 ms ) ; LCD command for cursor on ; write command to LCD ...
writing commands to the LCD with checking busy flag ; PA of 8255 connected to DO - D7 of LCD and ; PB0 = RS ... 5X7 matrix ; write command to LCD ; LCD command for cursor on ; write command to LCD ; clear LCD ; write command to LCD ...
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The 8051 Microcontrollers
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors
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