The 8051 Microcontroller and Embedded Systems, Volume 1For 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. |
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Page 309
For the program in Example 15-3 , it is recommended that you use the EQU directive for port addresses as shown next . APORT BPORT CPORT CNT PORT EQU EQU EQU EQU 1000H 1001H 1002H 1003H MOV A , # 90H MOV DPTR , #CNT PORT MOVX ...
For the program in Example 15-3 , it is recommended that you use the EQU directive for port addresses as shown next . APORT BPORT CPORT CNT PORT EQU EQU EQU EQU 1000H 1001H 1002H 1003H MOV A , # 90H MOV DPTR , #CNT PORT MOVX ...
Page 314
... checking busy flag ; PA of 8255 connected to DO - D7 of LCD and ; PBOERS , PB1 = R / W , PB2 = E for 8255 to LCD's control pins connect . MOV A , # 80H ; all 8255 ports as output MOV RO , #CNT PORT ; load control reg address MOVX ...
... checking busy flag ; PA of 8255 connected to DO - D7 of LCD and ; PBOERS , PB1 = R / W , PB2 = E for 8255 to LCD's control pins connect . MOV A , # 80H ; all 8255 ports as output MOV RO , #CNT PORT ; load control reg address MOVX ...
Page 315
I . I 1 ; New data write subroutine with checking busy flag NDATAWRT : MOV R2 , A i save A value MOV A , # 90H ; PA = IN to read LCD status , PB = OUT MOV RO , #CNTPORT ; load control port address MOVX ...
I . I 1 ; New data write subroutine with checking busy flag NDATAWRT : MOV R2 , A i save A value MOV A , # 90H ; PA = IN to read LCD status , PB = OUT MOV RO , #CNTPORT ; load control port address MOVX ...
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Contents
CHAPTERS | 1 |
The 8051 Microcontrollers | 23 |
8051 ASSEMBLY LANGUAGE PROGRAMMING | 35 |
Copyright | |
18 other sections not shown
Other editions - View all
The 8051 Microcontroller and Embedded Systems: Using Assembly and C Mazidi Muhammad Ali No preview available - 2007 |
Common terms and phrases
ACALL accumulator activated addition addressing mode ASCII assembler assigned Assume BACK bank baud rate binary bit addresses byte called carry Chapter chip clear command communication connected contents convert counter cycle decimal delay devices direct discussed DJNZ DPTR enable Example execution external Figure Find flag frequency Function gates ground hardware indicate input instruction interfacing internal interrupt jump latch load logic loop machine memory microcontroller mode MOVX Note Notice on-chip operand operation output pointer port provides pulse RAM location receive referred result serial SETB Show shown signal SJMP Solution space stack steps stop subroutine Table timer transfer True or false Write a program XTAL
Bibliographic information
| Title | The 8051 Microcontroller and Embedded Systems, Volume 1 The 8051 Microcontroller and Embedded Systems, Muhammad Ali Mazidi |
| Authors | Muhammad Ali Mazidi, Janice Gillispie Mazidi |
| Edition | illustrated |
| Publisher | Prentice Hall, 2000 |
| Original from | the University of Michigan |
| Digitized | 5 Aug 2011 |
| ISBN | 0138610223, 9780138610227 |
| Length | 435 pages |
| Export Citation | BiBTeX EndNote RefMan |