+ printf("\n");
+
+ /* try to write some data */
+ printf("write some data to the sector 04:\n");
+ for(i=0;i<16;i++) buf[i]=i;
+ i=4;
+ ret=gemtag_auth_mifare_key(gh,key6,i);
+ printf("return = %d\n",ret);
+ if(ret) printf("auth failed!\n");
+ ret=gemtag_write16(gh,i,buf);
+ if(ret) printf("write failed!\n");
+ printf("return = %d\n",ret);
+ ret=gemtag_read16(gh,i,buf);
+ if(ret) printf("read failed!\n");
+ printf("return = %d\n",ret);
+ printf("%02x: ",i);
+ hexdump(buf,16);
+ printf("\n");