You could use the MM5450 serial LED driver..

I have some old ugly but working code that you can have...I don't use them anymore due to graphic lcd displays ..

the LED_MAP data only fits the board I made ,you will have to map it to the way wou wire your's,but it not too difficult to do..


// for numbers 0-9 , I added text as define's..
code unsigned char LED_MAP[10] = {0xfc,0x60,0xda,0xf2,0x66,0xb6,0x3e,0xe0,0xfe,0xe6};

unsigned char display_segs(unsigned char c) {
unsigned char digit;
if((c>9)||(c<0))
digit=0;
else
digit=LED_MAP[c];//-'0'
return(digit);
}

void clock_x3(void){
unsigned char i;
for(i=0; i<4; ++i) {
MM5450_CLK =1;
delay_short();
MM5450_CLK =0;
delay_short();
}
}


void mm5450_init(void){
MM5450_DOUT=0;
delay_short();
MM5450_DOUT=1;
MM5450_CLK=1;
delay_short();
MM5450_CLK=0;
MM5450_DOUT=0;
delay_short();

}
void mm5450_reset(void){
MM5450_ENABLE=1;

}

void load_digits(unsigned int Led_Data) {
unsigned char i;

delay_short();
for(i=0; i<8; ++i) {
if((Led_Data & 1)==0)
MM5450_DOUT=0;
else
MM5450_DOUT=1;
MM5450_CLK=1;
delay_short();
MM5450_CLK=0;
Led_Data=Led_Data>>1;

}
}




void display_text(unsigned char one,unsigned char two,unsigned char three,unsigned char four){


delay_short();
mm5450_init();
load_digits(one);
load_digits(two);
load_digits(three);
load_digits(four);
clock_x3();
mm5450_reset();
}

void display_data_8( unsigned char value) {
unsigned char temp3,temp4,temp5,segs;

temp3=value%10;
value/=10;
temp4=value%10;
value /=10;
temp5=value%10;


mm5450_init();
segs=display_segs(temp5);
load_digits(segs);
segs=display_segs(temp4);
load_digits(segs);
segs=display_segs(temp3);
load_digits(segs);
load_digits(0);
clock_x3();
mm5450_reset();
}