newbie project for normaly open pushbutton.
Hardware:
STK500
Compiler: AVR Studio 4
Device: ATTiny15
Input: Port B -> pin 2 & 3 (From pushbutton)
Output: Port B -> pin 0 & 1 (To Led)
Description:
The ATTiny15 has active low at its Port B. STK500 supplied normaly open pushbutton. The project is to maintaint user input by manifesting it to the led display. If the user push the same button again, the led will goes off.
Hardware:
STK500
Compiler: AVR Studio 4
Device: ATTiny15
Input: Port B -> pin 2 & 3 (From pushbutton)
Output: Port B -> pin 0 & 1 (To Led)
Description:
The ATTiny15 has active low at its Port B. STK500 supplied normaly open pushbutton. The project is to maintaint user input by manifesting it to the led display. If the user push the same button again, the led will goes off.
| CODE |
;My Very First AVR Project .include "tn15def.inc" ;Includes the 8515 definitions file ;.include "tn2313def.inc" ;Includes the 8515 definitions file .def Input = R16 ;Gives "Defines" Register R16 the name Temp .def Displayer = R17 .def Const1 = R18 .def Delay1 = R19 .def Delay2 = R20 .org 0x0000 ;Places the following code from address 0x0000 rjmp RESET ;Take a Relative Jump to the RESET Label RESET: ;Reset Label ldi Input, 0x03 ;Store 255 in R16 (Since we have defined R16 = Temp) out DDRB, Input ;Setting the value of DDRD to WRITE. clr Displayer ;Initialized to zeros ser Const1 ;Set to high ser Delay1 ldi Delay2, 0xcf out PORTB,Delay1 ;Turn the led off Loop: ;Loop Label in Input,PINB ;Normally open push-button. eor Input,Const1 lsr Input lsr Input andi Input,0x03 ;Took Input bit as high bit cpi Input,0x00 breq Loop eor Displayer,Input Loop1: ;Delay so you had time to get ur finger off dec Delay1 brne Loop1 dec Delay2 brne Loop1 com Displayer out PORTB,Displayer com Displayer ;return the value again ldi Delay1,0xFF ldi Delay2,0xcf rjmp Loop ;Take a relative jump to the Loop label |