convers.lst

本程式通过4*4键盘的输入控制步进马达的正转和反转,停止转动以及加速和减速.

     1: 
     2: /*******************************************************************
     3: * Converte un numero da intero in stringa di caratteri             *
     4: *                                                                                                  *
     5: ********************************************************************/
     6: void itoa(int n,char s[])
     7: {
     8:         int i,a ;
     9:         if (n/100)
    10:                 a=2;
    11:         else if (n/10)
    12:                 a=1;
    13:         else 
    14:                 a=0;
    15:         i=a;
    16: 
    17:         do
    18:         {
    19:                 s[i--]= n%10 + '0';
    20:         }while ((n/=10)>0);
    21: 
    22:         s[a+1]='\0';
    23: }
    24: /*------------------------ eof itoa ------------------------------*/
    25: 
    26: /*******************************************************************
    27: *                Converte un numero da decimale in BCD             *
    28: ********************************************************************/
    29: unsigned char dec_bcd(char ndec)
    30: {
    31:         unsigned char i=0;
    32:         if (ndec>9){
    33:                 i=(ndec/10)<<4;
    34:                 i=i|(ndec%10);
    35:         }
    36:         else
    37:                 i=ndec;
    38:         return i;
    39: }
    40: /*------------------------ eof itoa ------------------------------*/
    41: 
    42: /*******************************************************************
    43: *                Converte un numero da decimale in BCD             *
    44: ********************************************************************/
    45: unsigned char bcd_dec(char nbcd)
    46: {
    47:         nbcd=(nbcd&0b00001111)+(nbcd>>4)*10;
    48:         return nbcd;
    49: }
    50: /*------------------------ eof itoa ------------------------------*/