Lập trình quét led 7 đoạn 74hc595 avr
Hôm nay mình sẽ giới thiệu quét led 7 đoạn với 74hc595
-IC 74hc595 là IC ghi dịch 8 bít được ứng dụng rất nhiều để mở rộng đầu ra ,
-ứng dụng đơn giản để điều khiển led 7 thanh
Đơn giản dữ liệu được cho vào ống nước ,mỗi lần xung clk sẽ đẩy dữ liệu vào ống ,
Khi đầy ống sẽ load dữ liễu ra
Mô phỏng protesus
code AVR
/*****************************************************
This program was produced by the
CodeWizardAVR V2.05.0 Professional
Automatic Program Generator
© Copyright 1998-2010 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
Project :
Version :
Date : 3/23/2018
Author : NeVaDa
Company :
Comments:
Chip type : ATmega16
Program type : Application
AVR Core Clock frequency: 16.000000 MHz
Memory model : Small
External RAM size : 0
Data Stack size : 256
*****************************************************/
#include <mega16.h>
#include <delay.h>
#define DATA1 PORTA.0
#define SCK1 PORTA.1
#define SCL1 PORTA.2
#define led1 PORTA.3
#define led2 PORTA.4
#define led3 PORTA.5
#define led4 PORTA.6
#define led5 PORTA.6
#define bat 1
#define tat 0
int m[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
int so1,so2,so3,so4;
int giay,phut,gio;
long int data=0;
void HIEN_THI_1(unsigned char x)
{
int i,temp,temp1,temp2,temp3;
for(i=0;i<8;i++)
{
temp=x;//gan bien
temp=temp&0x80;//lay ra bit dau tien (bit 7)
if(temp==0x80)//so sanh bit
DATA1=1; //bang 1 thi xuat vao chip =1
else
DATA1=0; //nguoc lai bang 0
x*=2; //dich bit lay bit trong so thap
SCK1=0; //tao xung tren chan 11
SCK1=1; //1 xung dua vào 1 bít
}
SCL1=0; //xuat du lieu ra output
delay_ms(1);
SCL1=1;
}
void hienthi(long int value)
{
int i;
unsigned int a,b,c,d,e;
a=value/10000;
b=(value-a*10000)/1000;
c=(value-a*10000-b*1000)/100;
d=(value-a*10000-b*1000-c*100)/10;
e=(value-a*10000-b*1000-c*100-d*10);
HIEN_THI_1(m[a]);
led1=bat;
delay_ms(1);
led1=tat;
HIEN_THI_1(m[b]);
led2=bat;
delay_ms(1);
led2=tat;
HIEN_THI_1(m[c]);
led3=bat;
delay_ms(1);
led3=tat;
HIEN_THI_1(m[d]);
led4=bat;
delay_ms(1);
led4=tat;
}
// Declare your global variables here
void main(void)
{
// Declare your local variables here
// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0xFF;
DDRA=0xFF;
// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;
// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;
// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x00;
// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;
// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;
// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;
// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;
// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;
// USART initialization
// USART disabled
UCSRB=0x00;
// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
// ADC initialization
// ADC disabled
ADCSRA=0x00;
// SPI initialization
// SPI disabled
SPCR=0x00;
// TWI initialization
// TWI disabled
TWCR=0x00;
while (1)
{
// if(++data>10000)data=0;
// hienthi(data);
HIEN_THI_1(m[0]);
// Place your code here
}
}
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