Subroutine per la stampa di un floating point

void PrintSting(float value) { char measure_float[9]={ }; //contiene il valore numerico da visualizzare in floating point convertito in stringa const char s1[20] = "f0: "; //grandezza misurata, frequenza fondamentale del segnale in questo particolare esempio const char s3[] = " Hz"; // unità di misura in Hz char TempString[20] = ""; //stringa temporanea(16 o 20 caratteri, dipende dal display usato) char EndString[20] = ""; //stringa finale da plottare strcpy(TempString,s1); FloatToString(measure_float,value,1); strcat(TempString,measure_float); memset(measure_float, ' ', strlen(measure_float)); strcat(TempString,s3); strcpy(EndString,TempString); write_string_LCD(EndString); memset(EndString, ' ', strlen(EndString)); home_LCD(); } void FloatToString(char *str, float f, char size) { char pos; // position in string char len; // length of decimal part of result char* curr; // temp holder for next digit int value; // decimal digit(s) to convert pos = 0; // initialize pos, just to be sure value = (int)f; // truncate the floating point number ltoa(value,str); // this is kinda dangerous depending on the length of str // now str array has the digits before the decimal if (f < 0 ) // handle negative numbers { f *= -1; value *= -1; } len = strlen(str); // find out how big the integer part was pos = len; // position the pointer to the end of the integer part str[pos++] = ','; // add decimal point to string while(pos < (size + len + 1) ) // process remaining digits { f = f - (float)value; // hack off the whole part of the number f *= 10; // move next digit over value = (int)f; // get next digit ltoa(value, curr); // convert digit to string str[pos++] = *curr; // add digit to result string and increment pointer } }