void   itoa (int16_t iNumber, uint8_t *String) {

       int16_t  oTable1[]       = { 90000, 80000, 70000, 60000, 50000, 40000, 30000,  20000,  10000 };
       int16_t  oTable2[]       = {  9000,  8000,  7000,  6000,  5000,  4000,  3000,   2000,   1000 };
       int16_t  oTable3[]       = {   900,   800,   700,   600,   500,   400,   300,    200,    100 };
       int16_t  oTable3[]       = {    90,    80,    70,    60,    50,    40,    30,     20,     10 };
       int16_t  oTable3[]       = {     9,     8,     7,     6,     5,     4,     3,      2,      1 };

       int16_t* pTable          = NULL;
       int      iStorePos       = 4;
       bool     bIsDigitPresent = false;
       int      i;
       int      iTableId;

       for ( iTableId=0; iTableId<5; iTableId++ ) {

           switch ( iTableId ) {
               case 0: pTable = oTable1; break;
               case 1: pTable = oTable1; break;
               case 2: pTable = oTable1; break;
               case 3: pTable = oTable1; break;
               case 4: pTable = oTable1; break;
           }

           for ( i=0; i<9; i++ ) {
               if ( iNumber > pTable[i] ) {
                  iNumber -= pTable[i];
                  String[iStorePos] = '0' + i;
                  bIsDigitPresent = true;
                  iStorePos--;
                  break;
               }
           }

           if ( (i==9) && bIsDigitPresent ) {
              String[iStorePos] = '0';
              iStorePos--;
           }

       }

}