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Within the Microelectronics centre we support the following microcontrollers 68HC11, 80C51 and the PIC16C5xx series; we have a set of software tools and emulators to help debug high and low level software /hardware designs. Within the demonstration we shall see a elementary program to chase lights on a parallel port (The knight rider car). The code is available in machine code and C as shown later. You will see the use of the compiler and assembler (IAR program) on a 68HC11 target machine. C code Program void main() { /* Author Mr James Mc Carren Date : 1 st March 1996 Fuctions used : delay Purpose : To Chase lights on port A Target : 68HC11 microcontroller Version : 1.0 Modifications : None */ unsigned char *Paddr,*Padr; unsigned char data; int x,i,del; /* Declare the port a pointers */ Padr = (unsigned char *)0x0; Paddr = (unsigned char *)0x1; /* Port A all outputs */ *Paddr =0xff; for(;;) { data = 0x1; for (i=0;i<=7;i++) /* Shift 8 times */ { for (del = 0;del<=0x3fff;del++); /* Very long delay */ *Padr = data< } } }
Explain Lexical substitution during macro expansion ? Lexical substitution is used to produce an assembly statement from a model statement. Model statements have 3 kinds of str
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The scheduling in which CPU is allocated to the process with least CPU-burst time is called? Ans. Shortest job first Scheduling wherein CPU is allocated to the process with lea
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A digital signature is encrypting information
explain the construction and working of calomel electrode
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How aliases are used in DNS? Explain. CNAME entries are analogous to a symbolic link in a file system- the entry gives an alias for other DNS entry. Corporation of expertsmind
Find the hex sum of (93) 16 + (DE) 16 ? Ans. Hex Sum of (93) 16 + (DE) 16 Convert Hexadecimal numbers 93 and DE to there binary equivalent demonstrated below:- Hence (9
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