** Enter Setup
21
Exit Setup
Write EEPROM
The scanner has 512 bytes of EEPROM. The EEPROM write command is used to write data to up to 256
addresses. You need to enable EEPROM write before a write operation and recommendedly disable it
afterwards to prevent miswriting. Note that writing without enabling it first will not return any error
message. So it is recommended to implement EEPROM read operation after every write for verification.
Syntax: {Prefix1} {Types} {Lens} {Address} {Datas} {FCS}
Prefix1 : 0x7E 0x00
Types : 0x04
Lens : 0x00~0xFF, byte count of Datas. When Lens=0x00, 256 bytes are to be written.
Address : 0x0000~0xFFFF, starting address to write data to.
Datas : 0x00~0xFF, data to be written into the EEPROM
FCS : CRC-CCITT checksum (2 bytes).
Computation sequence: Types+ Lens+Datas;
polynomial: X
16
+X
12
+X
5
+1 (0x1021), initial value: 0x0000.
The following C language program is provided for reference.
unsigned int crc_cal_by_bit(unsigned char* ptr, unsigned int len)
{
unsigned int crc = 0;
while(len-- != 0)
{
for(unsigned char i = 0x80; i != 0; i /= 2)
{
crc *= 2;
if((crc&0x10000) !=0)
crc ^= 0x11021;
if((*ptr&i) != 0)
crc ^= 0x1021;
}
ptr++;
}
return crc;
}
Summary of Contents for HR1150-70
Page 1: ...NLS HR11 Hand held Barcode Scanner User Guide...
Page 19: ...9 Dimensions unit mm Left View Front View Top View...
Page 67: ...Enter Setup 57 Exit Setup Good Read Beep Good Read Beep On Good Read Beep Off...
Page 116: ...Enter Setup Exit Setup 106 Set ISBN Format ISBN 13 ISBN 10...
Page 179: ...169 Digit Barcodes 0 5 0 1 2 3 4 5...
Page 180: ...170 6 9 6 7 8 9...
Page 181: ...171 A F A B C D E F...
Page 184: ...174 F7 F12 F7 F8 F9 F10 F11 F12...