File content as of revision 2:65c48a2e85dc:

//git test
//test test
#include "mbed.h"

DigitalOut dig_1(p15);
DigitalOut dig_2(p27);
DigitalOut dig_3(p28);
DigitalOut dig_4(p21);

DigitalOut seg_a(p30);
DigitalOut seg_b(p26);
DigitalOut seg_c(p13);
DigitalOut seg_d(p11);
DigitalOut seg_e(p10);
DigitalOut seg_f(p29);
DigitalOut seg_g(p14);
DigitalOut seg_dp(p12);


#define N_0 (0x03)
#define N_1 (0x9f)
#define N_2 (0x25)
#define N_3 (0x0d)
#define N_4 (0x99)
#define N_5 (0x49)
#define N_6 (0x41)
#define N_7 (0x1b)
#define N_8 (0x01)
#define N_9 (0x09)
const char segData[10] = {N_0, N_1, N_2, N_3, N_4, N_5, N_6, N_7, N_8, N_9,};

void segDataSet(unsigned char num){
    unsigned char work;
    
    work = segData[num];
    
    seg_a = (work & 0x80) ? 0 : 1;
    seg_b = (work & 0x40) ? 0 : 1;
    seg_c = (work & 0x20) ? 0 : 1;
    seg_d = (work & 0x10) ? 0 : 1;
    seg_e = (work & 0x08) ? 0 : 1;
    seg_f = (work & 0x04) ? 0 : 1;
    seg_g = (work & 0x02) ? 0 : 1;
    seg_dp = (work & 0x01) ? 0 : 1;
}


int main(){
    unsigned int cnt = 0;
    unsigned char sel = 1;
    
    while(1){   
        for(int i=0; i<1000; i++){
            dig_1 = 1;
            dig_2 = 1; 
            dig_3 = 1; 
            dig_4 = 1;     
            switch(sel){
                case 1: dig_1 = 0;
                        segDataSet((char)(cnt % 10));
                        break;
                case 2: dig_2 = 0;
                        segDataSet((char)(cnt / 10) % 10);
                        seg_dp = 1;
                        break;
                case 3: dig_3 = 0;
                        segDataSet((char)(cnt / 100) % 10); 
                        break;
                case 4: dig_4 = 0;
                        segDataSet((char)(cnt / 1000));
                        break;
                    }
            sel++;
            if(sel==5) sel=1;
            wait_ms(1);
        }
        //cnt++; if(cnt==10000)cnt=0;
        cnt =  0 + (int)(rand()*(9999-0+1.0)/(1.0+RAND_MAX));
        //wait_ms(10);
    }
}