Single bit oprations in avr microcontroller
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The document explains bit manipulation in programming using macros like setbit and clearbit. It demonstrates how to set or clear a specific bit in a binary representation of an address using shift operations. Examples are provided along with the expected outcomes of these operations.
Single bit oprations in avr microcontroller
- 2. If you have forgotten AND – Multiply OR – ADD
- 3. #define SETBIT(ADDRESS,BIT) (ADDRESS |= (1<<BIT)) • Understanding (1<<BIT) • 1 = 00000001 • BIT = any = 4(Ex) • 1<<4 = 00000001<<4 (1 is left shifted 4 times) • (1<<BIT) = 00010000
- 4. #define SETBIT(ADDRESS,BIT) (ADDRESS |= (1<<BIT)) • ADDRESS = PORTX = 00100100 (suppose) • ADDRESS |= (1<<BIT)) ⇒ ADDRESS = ADDRESS | (1<<BIT) • ADDRESS | (1<<BIT) ⇒ 00100100 | 00010000 • Updated ADDRESS = 00110100 Click here to visit -ROBO INDIA
- 5. #define CLEARBIT(ADDRESS,BIT) (ADDRESS &=~ (1<<BIT)) • ADDRESS = PORTX = 00110100 (suppose) • ADDRESS &= ~(1<<BIT)) ⇒ ADDRESS = ADDRESS & INVERTED(1<<BIT) • ADDRESS & ~ (1<<BIT) ⇒ 00110100 & 11101111 • Updated ADDRESS = 00100100 Click here to visit -ROBO INDIA
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