掃瞄頭是能夠進行配置的，使其支援與禁用某些條碼型別，設定有兩種方式，一種是掃一下相應的設定條碼，還有一種是通過ssi(****** serial inte***ce)來設定，以下就講一下ssi的設定方式。
掃瞄頭在上電以後，就能夠對其傳送相應引數設定了，摩托羅拉建議設定暫時引數。設定永久生效的引數會損害掃瞄頭內部的flash，flash損壞後掃瞄頭將無法使用，比方出現乙個點的雷射，正常情況是一條線。flash壽命有限，請謹慎。暫時設定會在掃瞄頭斷電以後丟失。每次上電的時候都要設定一次，所以建議將須要設定的引數寫入到登錄檔中。每次上電以後從登錄檔讀取。
static char wakeup = ;
//2's complement sum of message contents excluding checksum.
static size_t __checksum(char data,size_t d_size)
while(d_size--)
return ((~sum)+1);
}//store params to register,when power off
int setscannersetvaluetolocal(void *data,size_t len)
; size_t iretval=0;
assert(data!=null && len>0);
if(error_success == regopenkeyex(hkey_local_machine,_t("hardware\\scandev\\setting"),0,0,&hk))
else
}else
else
}regclosekey(hk);
return iretval;
#endif
}static void __getscannersetvaluefromlocal(void *data,size_t in_len,size_t * out_len)
; if(error_success == regopenkeyex(hkey_local_machine,_t("hardware\\scandev\\setting"),0,0,&hk))
else
}} regclosekey(hk);
#endif /*end of macro wince*/
}//when scanner engine power on,you can call this function
static size_t setparamvalues(void)
; size_t count=0;
size_t len=0,i=0;
char buffer[4096]=;
//attention!!! temporary change - lost when power removed
//failure to meet these conditions can corrupt the scan engine's memory.
//must be 0x00,0xff,not is 0x01,0xff
char temp=;
__getscannersetvaluefromlocal(param_list,sizeof(param_list),&count);
if(param_list == null || count <= 0)
len=sizeof(temp)/sizeof(char);
buffer[0]=((count+len+1)&0xff); //length
memcpy(buffer+1,temp,len);
memcpy(buffer+len+1,param_list,count);
check_sum=__checksum(buffer,len+count+1);
buffer[len+count+1]=((check_sum>>8)&0xff); //height byte
buffer[len+count+2]=(check_sum&0xff); //low byte
write_com_data(wakeup,sizeof(wakeup));
_sleep(100); //change from 70 to 100ms waiting for scanner wakeup
write_com_data(buffer,len+count+3); //length: 1 byte,checksum: 2 byte
return 0;
#endif /*end of macro wince*/
}
write_com_data的api是平台相關性的，請依據自身平台不同改動實現。