は、lcdの浮動小数点数をavr micro＆Avrstudioで表示します

Pt100 tempをlcdに表示するためのAvrstudio V6プロラム（cコード）を1つ使用していますので、ACDWの値を正しく読み込みますが、私はlcdの浮動小数点値を表示することができませんでした。は、lcdの浮動小数点数をavr micro＆Avrstudioで表示します

簡単なプログラムは、LCD内の1つの浮動小数点値を示している、私が使用していますLCDライブラリはLCD Library

から主なコードがあるさ：

#include <avr/io.h> 
#include <avr/interrupt.h> 
#include <stdlib.h> 
//#define F_CPU 16000000UL 
#define F_CPU 8000000 
#include <util/delay.h> 
#define ADC_VREF_TYPE 0x40 
//#include "adc_new.h" 
#define D4 eS_PORTC4 
#define D5 eS_PORTC5 
#define D6 eS_PORTC6 
#define D7 eS_PORTC7 
#define RS eS_PORTC2 
#define EN eS_PORTC3 
#include "lcd.h" //Can be download from the bottom of this article 
// Constants and variables 
//***************************************************************************** 
// Input: Square wave on ICP PIN 
// This program determines the pulse width of a square wave and if the pulse width is greater than 40 us 
//than PD4 goes higher ,if its smaller than PD4 is low. 

//---------------------------------------------------------// 
void LCD_0(void) 
{ 
    /* 
' Lcd module connections 
dim LCD_RS as sbit at PORTc2_bit 
dim LCD_EN as sbit at PORTc3_bit 
dim LCD_D4 as sbit at PORTc4_bit 
dim LCD_D5 as sbit at PORTc5_bit 
dim LCD_D6 as sbit at PORTc6_bit 
dim LCD_D7 as sbit at PORTc7_bit 

dim LCD_RS_Direction as sbit at DDc2_bit 
dim LCD_EN_Direction as sbit at DDc3_bit 
dim LCD_D4_Direction as sbit at DDc4_bit 
dim LCD_D5_Direction as sbit at DDc5_bit 
dim LCD_D6_Direction as sbit at DDc6_bit 
dim LCD_D7_Direction as sbit at DDc7_bit 

*/ 

DDRC = 0xFF; 


Lcd4_Init(); 
Lcd4_Set_Cursor(1,1); 
Lcd4_Write_String("Elasa.ir Test"); 
} 

//http://www.geeksforgeeks.org/convert-floating-point-number-string/ 
// Converts a floating point number to string. 
void ftoa(float n, char *res, int afterpoint) 
{ 
    // Extract integer part 
    int ipart = (int)n; 

    // Extract floating part 
    float fpart = n - (float)ipart; 

    // convert integer part to string 
    int i = itoa(ipart, res, 0); 

    // check for display option after point 
    if (afterpoint != 0) 
    { 
     res[i] = '.'; // add dot 

     // Get the value of fraction part upto given no. 
     // of points after dot. The third parameter is needed 
     // to handle cases like 233.007 
     fpart = fpart * pow(10, afterpoint); 

     itoa((int)fpart, res + i + 1, afterpoint); 
    } 
} 


int main(void) { 
DDRD = (0<<PD4);  // put PortB bit 5 as input 
//PORTD = 0<<PD4;  // Enable PE4 pull-up resistor 
DDRC = 0xFF; 
//enable overflow and input capture interrupts 

TIMSK=0x24; 

/*Noise canceller, without prescaler, rising edge*/ 

TCCR1B=0xC1; 



// ADC initialization 
// ADC Clock frequency: 1000.000 kHz 
// ADC Voltage Reference: Int., cap. on AREF 
ADMUX=ADC_VREF_TYPE & 0xff; 
ADCSRA=0x83;_delay_ms(30); 


Lcd4_Init(); 

Lcd4_Set_Cursor(1,1); 
Lcd4_Write_String("Pulse width measuring:"); 
//Lcd4_Set_Cursor(2,1); 

//itoa(pulse_width2, str3, 10); 

_delay_ms(3); 



    while(1) 
    { 
     //http://www.edaboard.com/thread63677.html 
     char buffer22[24]; 
     float x = 1.5; 

     sprintf(buffer22, "Flo %f", x); 
     Lcd4_Clear(); 
     Lcd4_Set_Cursor(1,1); 
     Lcd4_Write_String("Temp_eda:"); 
     Lcd4_Set_Cursor(2,1); 
     Lcd4_Write_String(buffer22); 
     _delay_ms(300); 


     char res[20]; 
     float n = 233.007; 
     ftoa(n, res, 4); 


     //ftoa3(myFloatStr, myFloat, 10); 
     //Lcd4_Write_String(myFloatStr); 
     Lcd4_Clear(); 
     Lcd4_Set_Cursor(1,1); 
     Lcd4_Write_String("Temp_PT100:"); 
     Lcd4_Set_Cursor(2,1); 
     Lcd4_Write_String(res); 
     _delay_ms(300); 

    } 
}

だから、うちプロテウスに入れてここにある：