1. Neatly work out the following bitwise operations. Show the work step by step. Give the answers in binary, hexadecimal and decimal. a. unsigned char Question1A = (0×DB & 0x69) | 17; b. unsigned char Question1B = (~0x89 & 109) >> 1; c. signed char Question1C = ~ (0x37 ^ -84); d. signed char Question1D = ('?' | 'p') « 2; 2. The standard delay function, void delay (unsigned long cycle), will pause the program by a designated number of instruction cycles, Tey. There are two auxiliary functions, void_delay_us (float time_us), void _delay_ms (float time_ms), that will allow the user to delay by a bit 3-0 FRQ<3:0>: HFINTOSC Frequency Selection bits(1) designated time, in us or ms, by calculating the equivalent number of instruction cycles and calling the delay function. FRQ<3:0> Nominal Freq (MHz) 1001 1010 1111 Write two new library functions, 1110 Reserved my_delay_us, and my_delay_ms, that will simulate the behaviour of_delay_us and _delay_ms. 1101 1100 1011 1000 64 Notes: 0111 48 i. The oscillator frequency, Fosc, can 32 0110 0101 16 be accessed by reading the least significant 4-bits (bits 3-0) of the OSCFRQ register. 0100 12 0011 8 0010 4. 0001 2 0000 1
1. Neatly work out the following bitwise operations. Show the work step by step. Give the answers in binary, hexadecimal and decimal. a. unsigned char Question1A = (0×DB & 0x69) | 17; b. unsigned char Question1B = (~0x89 & 109) >> 1; c. signed char Question1C = ~ (0x37 ^ -84); d. signed char Question1D = ('?' | 'p') « 2; 2. The standard delay function, void delay (unsigned long cycle), will pause the program by a designated number of instruction cycles, Tey. There are two auxiliary functions, void_delay_us (float time_us), void _delay_ms (float time_ms), that will allow the user to delay by a bit 3-0 FRQ<3:0>: HFINTOSC Frequency Selection bits(1) designated time, in us or ms, by calculating the equivalent number of instruction cycles and calling the delay function. FRQ<3:0> Nominal Freq (MHz) 1001 1010 1111 Write two new library functions, 1110 Reserved my_delay_us, and my_delay_ms, that will simulate the behaviour of_delay_us and _delay_ms. 1101 1100 1011 1000 64 Notes: 0111 48 i. The oscillator frequency, Fosc, can 32 0110 0101 16 be accessed by reading the least significant 4-bits (bits 3-0) of the OSCFRQ register. 0100 12 0011 8 0010 4. 0001 2 0000 1
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
Transcribed Image Text:1.
Neatly work out the following bitwise operations. Show the work step by step. Give the
answers in binary, hexadecimal and decimal.
a. unsigned char Question1A = (0×DB & 0x69) | 17;
b. unsigned char Question1B =
(~0x89 & 109) >> 1;
c. signed char Question1C = ~ (0x37 ^ -84);
d. signed char Question1D
('?' | 'p') « 2;
2.
The standard delay function,
void
delay (unsigned long cycle),
will pause the program by a designated number of instruction cycles, Tey. There are two auxiliary
functions,
void_delay_us (float time_us),
void delay ms (float time ms),
that will allow the user to delay by a
FRQ<3:0>: HFINTOSC Frequency Selection bits(1)
bit 3-0
designated time, in us or ms, by calculating
the equivalent number of instruction
FRQ<3:0>
Nominal Freq (MHz)
1001
cycles and calling the delay function.
1010
1111
Write
two
new
library functions,
1110
Reserved
my_delay_us, and my_delay_ms, that
will simulate the behaviour of_delay_us
and_delay_ms.
1101
1100
1011
1000
64
Notes:
0111
48
i.
The oscillator frequency, Fosc, can
0110
32
be accessed by reading the least
0101
16
0100
12
significant 4-bits (bits 3-0) of the
OSCFRQ register.
0011
8
0010
4
0001
2
0000
1
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