Newland NLS-EM2000, User Manual

Page: 23 / 141

13
Relationship between Programming Command and Serial Command
1. Program general parameter with serial command
A programming command (i.e. the characters under programming barcode) contains 7 characters. The
function of each character is described in the table below.
1st Char 2nd Char ~3rd Char 4th Char~5th Char 6th Char~7th Char
Remark
CMD BITPOSITION ADDR DATA
“W” “00”~“FF” “00”~“FF” “00”~“FF”
Write a value (DATA) to the
specified bits (BITPOSITION)
of the register (ADDR).
Note:1. CMD : Command type.
2. ADDR : Address of register to be written.
3. BITPOSITION : Bit(s) the value is written to. For example, if only bit 3 is to be written, the
BITPOSITION should be “08”; if all bits are to be written, the BITPOSITION should be “FF”.
4. DATA : Value written to the BITPOSITION.
The ADDR and DATA in programming command correspond to Address and Datas in serial command,
respectively:
1) If BITPOSITION=”FF”, the values of ADDR and DATA can be used directly in the write command.
e.g., programming command: WFFD9D8 (write value 0xD8 to register 0x00D9 )
serial command sent : 0x7E 0x00 0x08 0x01 0x00 0xD9 0xD8 0x91 0x53
reply received : 0x02 0x00 0x00 0x01 0x00 0x33 0x31
2) If BITPOSITION≠”FF”, users need to read the register content, calculate the value (Datas) and then
write the value into the register, as shown in the following example.
e.g., programming command: W030002 (write value 0x02 to bit1and bit0 of register 0x0000)
Step 1: Read the content of register 0x0000.
serial command sent : 0x7E 0x00 0x07 0x01 0x00 0x00 0x01 0x01 0x41