Question
Asked Mar 25, 2020
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3. Explain what happens when the following C code is executed (independent execution,
not combined with the previous line).
a.
PORTA |= 0X40
b.
PTP = PTP&OXbd
c.
if (!(ADCTL & OX80))
STATEMENT;
d.
if( i>0 && i<10)
STATEMENT;
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3. Explain what happens when the following C code is executed (independent execution, not combined with the previous line). a. PORTA |= 0X40 b. PTP = PTP&OXbd c. if (!(ADCTL & OX80)) STATEMENT; d. if( i>0 && i<10) STATEMENT;

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Expert Answer

Step 1

To be able to understand the working of the execution of the given codes, knowledge about bit-parallel logical operators and Boolean operators is important.

  • Bit-parallel logical operators:
  1. & (AND)
  2. | ( OR)

& (AND) : This operator performs bit-wise AND. It means the values will be manipulated with each bit of the value.

Example A and B are two values. A is a binary value 0 1 1 0 0 1 1 0, B is a binary value 1 0 1 1 0 0 1 1 and bit-wise & operation has to be performed.

Suppose C = A & B. Then every bit of A will be & with the corresponding bit of B.

The following representation shows the operation clearly:

                                A  0 1 1 0 0 1 1 0

                  (AND)    B  1 0 1 1 0 0 1 1

                                C  0 0 1 0 0 0 1 0

| (OR) :

This operator performs bit-wise OR. It means the values will be manipulated with each bit of the value.

Example:

A and B are two values. A is a binary value 0 1 1 0 0 1 1 0 and B is a binary value 1 0 1 1 0 0 1 1...

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