namqnfloat fvar = 1.2345;
printf(lcd_putc, "Float: %f", fvar);
void lcd_putc( char c) {
switch (c) {
case '\f' : lcd_send_byte(0,1);
delay_ms(2);
break;
case '\n' : lcd_gotoxy(1,2); break;
case '\b' : lcd_send_byte(0,0x10); break;
default : lcd_send_byte(1,c); break;
}
}
unsigned char ptr = 0;
unsigned char buffer[10]; //vùng RAM chứa mã LED 7 đoạn để xuất ra, ở đây là 10 LED
void led7seg( char c) {
unsigned num;
num = c - 0x30;
buffer[ptr] = table_led7doan[num];
ptr++;
if(ptr>=10) ptr = 0;
}
//với table_led7doan[] là bảng const chứa mã 7 đoạn từ 0-9
//Bạn muốn in từ vị trí nào thì cho ptr bằng giá trị đó
//Bạn sử dụng hàm printf như sau
printf(led7seg, "Float: %f",fvar);
//đảm bảo chạy 100%
#include<18f4431.h>
#fuses NOWDT,NOLVP,PUT,XT
#byte PORTB=0xF81
#byte TRISB=0xF93
void main()
{
While(1)
{
TRISB=0x00;
PORTB=0x0F;
}
}
//Configuration bits #pragma config OSC = INTIO1 #pragma config FSCM = OFF #pragma config IESO = OFF #pragma config PWRT = OFF #pragma config BOR = ON #pragma config BORV = 27 #pragma config WDT = OFF #pragma config WDTPS = 32768 #pragma config MCLRE = ON #pragma config PBAD = DIG #pragma config CCP2MX = C1 #pragma config STVR = ON #pragma config LVP = OFF #pragma config DEBUG = OFF #pragma config CP0 = OFF #pragma config CP1 = OFF #pragma config CP2 = OFF #pragma config CP3 = OFF #pragma config CPB = OFF #pragma config CPD = OFF #pragma config WRT0 = OFF #pragma config WRT1 = OFF #pragma config WRT2 = OFF #pragma config WRT3 = OFF #pragma config WRTB = OFF #pragma config WRTC = OFF #pragma config WRTD = OFF #pragma config EBTR0 = OFF #pragma config EBTR1 = OFF #pragma config EBTR2 = OFF #pragma config EBTR3 = OFF #pragma config EBTRB = OFF
#include <16f877a.h>
#include <def_877a.h>
#device 16F877*=16 ADC=10
#use delay(clock=8000000)
#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT
#include <lcd_lib_4bit.c>
unsigned int a,b,c,d,adc;
long value;
char *text;
void main()
{
set_tris_d(0);
setup_adc_ports( AN0_AN1_AN3 );
setup_adc(ADC_CLOCK_INTERNAL);
set_adc_channel( 0 );
delay_ms(100);
text="V";
while(1)
{
adc=read_adc();
//value=(adc*5000)/1023;
value = (long)adc * 5000; // covert adc reading to milivolts
value = value / 1023; // 0..1023 -> 0-5000mV
a=value/1000;
b=(value-(a*1000))/100;
c=(value-(a*1000)-(b*100))/10;
d=(value-(a*1000)-(b*100)-(c*10));
LCD_Init();
LCD_putcmd(0x80);
LCD_putchar(48+a);
LCD_putcmd(0x81);
LCD_putchar(48+b);
LCD_putcmd(0x82);
LCD_putchar(48+c);
LCD_putcmd(0x83);
LCD_putchar(48+d);
LCD_putcmd(0x84);
LCD_putchar(text);
delay_ms(100);
}
}
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