سلام دوستان. بعد از اینکه از 8051 نا امید شد اومدم سراغ avr.
کسی میتونه در ضمینه ساخت rgb با avr به من کمک کنه؟؟؟؟
کسی میتونه در ضمینه ساخت rgb با avr به من کمک کنه؟؟؟؟
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رهرو آن است که آهسته و پیوسته رود
رهرو آن نیست که گه تند و گهی خسته رود -
پاسخ : تولید RGB با avr
سلام با pwm ار کنید موفق باشید :job: -
پاسخ : تولید RGB با avr
اطلاعات بیشتر رو میتونی داخل پستی با موضوع تابلو های RGB داخل همین سایت پیدا کنی.
موفق باشیدیدگاه
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پاسخ : تولید RGB با avr
An RGB LED is a LED which has three LED's integrated in one packaging. These LED's have the colors red, green, and blue. Such a LED costs about 1 Euro. With these three colours you can mix to any colour. When using 8-bit PWM a number of 256 * 256 * 256 combinations can be made, thus the LED can show 16.777 million colours, and 256 different brightnesses. When all the three LED's are at full brightness the color will be white.When they are all off the color will be 'black' in the dark
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The RGB LED used here has four leads, one for each color an one for the common cathode(ground). The Red LED operates on a voltage of 2 V, Green needs 3.5 V, and the Blue LED needs also 3.5 V. Each LED draws 20mA current, so the maximum current consumption is 60mA.
The circuit is very simple.The RGB LED is hooked up to the PWM outputs on PORTB1, PORTB2 and PORTB3 of the ATMega8. There is also a resistor between theb LED and the ATM8 to limit the current to 20mA. There is also a link to the datasheet of the RGB LED that is used in this project.
;***** PWM demonstration with RGB LED ****
; Demonstrates how to set the PWM modes of the Timer/Counter1, 1a and 2 of the AT Mega8.
; A RGB LED @ the PWM output at PORTB.1.2.3 fades on and off.
; Author : www.avrprojects.net
; Target : ATMega8
; Hardware : RGB LED at PORTB1:2:3 G:B:R
;*****************************************
.include "M8def.inc"
.def Temp =r16 ; Temporary register
.def pw1 =r20 ;
.def pw2 =r21 ;
.def pw3 =r22 ;
;***** Initialization ********************
INIT_SP:
ldi r16,high(RAMEND) ;Intialize stackpointer
out SPH,r16
ldi r16,low(RAMEND)
out SPL,r16
ldi temp,0
out OCR1AL,temp
out OCR1BL,temp
out OCR2,temp
INIT_PORTB:
ser Temp
out DDRB,Temp ; Set PORTB to output
clr temp
out PORTB,temp ; Set PORTB to 0
INIT_TIMER_1AB:
ldi temp, 0b10100001 ; Set Timer/Counter1AB, set PWM mode to clear OC1AB at upcounting, set OC1AB at downcounting
out TCCR1A, temp ;
ldi temp, 0b00000001 ; Start Timer/Counter1AB
out TCCR1B, temp
INIT_TIMER_2:
ldi temp, 0b01100001 ; Start Timer/Counter2 , set PWM mode to clear OCR2 at upcounting
out TCCR2, temp
;******* this is the main loop
LOOP: rcall UP1 ; call UP1 subroutine
rcall DN1
rcall UP2
rcall DN2
rcall UP3
rcall DN3
rjmp LOOP
;******* subroutines
UP1: inc pw1 ; Increase the pulse width
out OCR1AL,pw1 ; Output to CompareRegister1A which will set the puls width
rcall delay ; Delay of 0.01s
cpi pw1,255 ; Check if pulse width is max
brne UP1
ret
DN1: dec pw1
out OCR1AL,pw1
rcall delay
cpi pw1,0
brne DN1
ret
UP2: inc pw2 ; Increase the pulse width
out OCR1BL,pw2 ; Output to CompareRegister1B which will set the puls width
rcall delay ; Delay of 0.01s
cpi pw2,255 ; Check if pulse width is max
brne UP2
ret
DN2: dec pw2
out OCR1BL,pw2
rcall delay
cpi pw2,0
brne DN2
ret
UP3: inc pw3 ; Increase the pulse width
out OCR2,pw3 ; Output to CompareRegister2 which will set the puls width
rcall delay ; Delay of 0.01s
cpi pw3,255 ; Check if pulse width is max
brne UP3
ret
DN3: dec pw3
out OCR2,pw3
rcall delay
cpi pw3,0
brne DN3
ret
منبع www.avrprojects.netکمتر به سایت میام .....دیدگاه
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