explain about temprature project code

[pedram]

hi,

I have a problem in code of “ Celsius and Fahrenheit scale digital thermometer using 8051 microcontroller (AT89C51)” project in these line:

 

…….

test_final=test_intermediate3;

    lcd_cmd(0xc1);        //Setting  cursor to first position of first line

    delay(2);

    lcd_data_string(“TEMP:”);

    s=test_final/100;

    test_final=test_final%100;

    lcd_cmd(0xc8);

    if(s!=0)

    lcd_data(s+48);

    else

    lcd_cmd(0x06);

    s=test_final/10;

    test_final=test_final%10;

    lcd_data(s+48);

    lcd_data(test_final+48);

    lcd_data(0);

    lcd_data(‘c’);

    lcd_data(‘ ‘);

    delay(2);

……

 

please explain bold lines of code and why plus 48 to the results?

[AJISH ALFRED]

Hi,

48 is added to any sigle digit value to get its ascii value, because ascii value of 0 is 48.

To get ascii value of 1, use 1+48

To get ascii value of 2, use 2+48

 

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