PIC16f873a FloatToStr

[oscar0359]

// Lcd pinout setting

sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB4_bit;
sbit LCD_D5 at RB5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;

//Pin Direction
sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;

#define ventilador1 PORTC.RC0
#define Piloto1 PORTC.RC1
#define Ventilador2 PORTC.RC2

//unsigned int temp=0.0,temp1=0.0 ;
char valor[16];
float temp,temp1 ;

void main() {

ADCON0=0x4D;
ADCON1=0x42;
TRISC=0x00;
PORTC=0x00;

ADC_Init();
Delay_ms(250);
Lcd_init();
Lcd_Cmd(_Lcd_Cursor_off);
Lcd_Out(1,1, "SYSTEM LADA_NIVA");
Lcd_out(2,1, " *INIC SENSORES ");
Delay_ms(1600);
Lcd_Cmd(_Lcd_Clear);
Lcd_Out(1,1, "#Escan Sensores#");
ventilador1 = 1;
Piloto1 = 1;
Ventilador2=1;

while(1){
temp=ADC_Read(0);
temp=(temp*150)/307;
FloatToStr(temp, valor);
Lcd_Out(2,1, "Temp = ");
Lcd_Out_CP(valor);

//valor=temp / 1000;
//Lcd_chr(2,1, 48+valor);
}
}

Cordial greeting

I appreciate the opportunity to be part of this community.
the question I have is that I am programming a pic 16f873a with micro c pro and when converting float to str it throws me several decimals
but I just want to keep two decimals thanks

[stefan.filipovic]

Hi,

Welcome to the MikroE forum.

There's a FloatToStr_FixLen function, so you can use it instead of FloatToStr.
Please refer to its help file description.

Kind regards,

[janni]

There's a FloatToStr_FixLen function, so you can use it instead of FloatToStr.

I would not advise to use this function. It has too many quirks and one not always can avoid them. It's also quite inconvenient - to display signed numbers with same precision one has to check the sign first and appropriately set string length.

An example of what FloatToStr_FixLen set for 6 chars result gives

Code: Select all

argument         result

 12.34567        "12.345"   OK   
-12.34567        "-12.34"   OK but precision differs from a positive number
 1.234567        "1.234"    5 chars instead of 6
-1.234567        "-1.23"    5 chars instead of 6
 0.1234567       "1.2345"   ? invalid result  
-0.1234567       "-1.234"   ? invalid result  
 0.01234567      "1.2345"   ? invalid result    
 12345.67        "12345."   OK but not elegant  
 1234567.0       "123456"   formally OK but may surprise
 12345678.0      "1.2345"   ? invalid result  

[oscar0359]

THANK YOU FRIENDS OF THE FORUM I HAVE ACHIEVED IT