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Input Output programming in AVR microcontroller
The document provides an overview of the ATmega16 microcontroller, detailing its 40 pins and 32 I/O pins distributed across four ports (A, B, C, D). It explains the configuration of these ports for input/output operations using specific commands and includes examples of setting directions and values. Additionally, it covers basic programming structures like 'if', 'for', and 'while' loops, along with methods to detect input states.
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Input Output programming in AVR microcontroller
- 2. • Atmega16 havetotal of 40 pins 32 I/O pins.. PORT “A” = 8 Pins PORT “B” = 8 Pins PORT “C” = 8 Pins PORT “D” = 8 Pins
- 3. Port “X” DDRX PORTXPINX NOTE:- X is the name of port and it can be A, B, C or D .
- 4. • DDRX –For setting the direction i.e. Input or output. • PORTX – For setting output value of port. • PINX – For reading data available in port. NOTE:- X is the name of port and it can be A, B, C or D . Click here to visit -ROBO INDIA
- 5. DDRX= 0xFF; (O/P-Port) DDRX=0x00; (I/P-Port) or DDRX = 0b 1 1 1 1 1 1 1 1 ; (O/P-Port) DDRX = 0b 0 0 0 0 0 0 0 0 ; (I/P-Port) NOTE:- X is the name of port and it can be A, B, C or D . Click here to visit -ROBO INDIA
- 6. 1. PORTX= 0xF0; PORTX = 0b 1 1 1 1 0 0 0 0 ; 2. PORTX= 0xFF ; PORTX = 0b 1 1 1 1 1 1 1 1; 3. PORTX= 0x00 ; PORTX = 0b 0 0 0 0 0 0 0 0; Click here to visit -ROBO INDIA
- 7. 1.If if ( conditions) { code to be executed } 2.For loop for(start ; condition ; step) {code to be executed} 3.While loop while( Condition) { code to be executed } Click here to visit -ROBO INDIA
- 8. bit_is_clear(PINX,0)) //No input bit_is_set(PINX,0))//Detecting input Click here to visit -ROBO INDIA
- 9. if (bit_is_set(PINX,0))) { codeto be executed } if (bit_is_clear(PINX,0))) { code to be executed } Click here to visit -ROBO INDIA
- 10. while(bit_is_set(PINX,0))) { code tobe executed } while(bit_is_clear(PINX,0))) { code to be executed } Click here to visit -ROBO INDIA
- 11. • #include <avr/io.h> •#include <util/delay.h> Click here to visit -ROBO INDIA
- 12. In case ofqueries please write us- [email protected] www.roboindia.com Click here to visit -ROBO INDIA