TH250
Programmer’s Guide
120
Note:
When a specific item request is made, a returned CRC value of 0 0 indicates that no item is
stored at that index. There is a practically negligible possibility that a valid object will have a 0 0
CRC; if this is of concern, applications should check the object downloaded byte sequence to verify
that this is not the case (as well as store the CRC as an “ID” for the object if needed later for return
value comparisons).
This command returns the state of occupancy of available flash storage and user RAM. The printer
response for each item is a 4 byte header, 0x1D 0x97 nL nH (number of bytes that follow in the
response) and for each item a 4 byte structure: 1
st
m (type) byte, 2
nd
n index byte followed by a 2
byte CRC in Lo Hi order of the data string in that storage space.
The return for m = 0–2 is the header and one 4-byte item giving remaining storage space in the
CRC position in
Lo Hi order: 1D 97 4 0 m 0 fL fH, where f is the kBytes of storage remaining. Note that RAM storage
space is not content typed, while available flash is statically divided into logo, character set, and
user data types. Change of the divisions is possible via flash erasure and flash allocation
commands.
Lock permanent font flash area
This command allows or prevents the permanent font area to be erased.
Note: This only affects the 1D 40 33 commands and downloading a font to permanet font area
when a font already exists with the same ID.
Flash download
These commands are used to load firmware into the printer.
The commands are listed in numerical order according to their hexadecimal codes. Each command
is described and the hexadecimal, decimal, and ASCII codes are listed.
There are two ways to enter the download mode.
1.
While the printer is running normally, send the command, “Switch to flash download mode”
(1B 5B 7D) to leave normal operation and enter the download mode.
2.
If the flash if found corrupted during level 0 diagnostics the download mode is automatically
entered after the printer has reset.
The printer never goes directly from the download mode to normal printer operation. To return to
normal printer operation either the operator must turn the power off and then on to reboot or the
application must send a command to cancel download mode and reboot.
When each flash download command is received, the printer returns either ACK or NAK to the host
computer when each command is received:
ACK (hexadecimal 06)
Sent when the printer has received a host transmission and has completed the request
successfully.
NAK (hexadecimal 15)
ASCII
Hexadecimal
Decimal
Value of
n
:
GS 0xF0 0x10
n
1D F0 10
n
29 240 16
n
n = 0x00
lock permanent font flash (default)
n = 0x01
unlock permanent font flash to erase or delete
Summary of Contents for TH250
Page 1: ...TH250 Thermal Printer Programmer s Guide January 2016 ...
Page 153: ...TH250 Programmer s Guide 148 Character code table Page 1 PC850 Multilingual Latin I ...
Page 154: ...TH250 Programmer s Guide 149 Character code table Page 2 PC852 Latin II ...
Page 155: ...TH250 Programmer s Guide 150 Character code table Page 3 PC860 Portuguese ...
Page 156: ...TH250 Programmer s Guide 151 Character code table Page 4 PC863 Canadian French ...
Page 157: ...TH250 Programmer s Guide 152 Character code table Page 5 PC865 Nordic ...
Page 158: ...TH250 Programmer s Guide 153 Character code table Page 6 PC858 Multilingual I Euro ...
Page 159: ...TH250 Programmer s Guide 154 Character code table Page 7 PC866 Russian ...
Page 160: ...TH250 Programmer s Guide 155 Character code table Page 8 WPC1252 Latin I ...
Page 161: ...TH250 Programmer s Guide 156 Character code table Page 9 PC862 Hebrew ...
Page 162: ...TH250 Programmer s Guide 157 Character code table Page 10 PC737 Greek ...
Page 163: ...TH250 Programmer s Guide 158 Character code table Page 11 PC874 Thai ...
Page 164: ...TH250 Programmer s Guide 159 Character code table Page 12 PC857 Turkish ...
Page 165: ...TH250 Programmer s Guide 160 Character code table Page 13 WPC1251 Cyrillic ...
Page 166: ...TH250 Programmer s Guide 161 Character code table Page 14 WPC1255 Hebrew ...
Page 167: ...TH250 Programmer s Guide 162 Character code table Page 15 KZ_1048 Kazakh ...
Page 168: ...TH250 Programmer s Guide 163 Character code table Page 16 WPC1254 Turkish ...
Page 169: ...TH250 Programmer s Guide 164 Character code table Page 17 WPC1250 Central Europe ...
Page 170: ...TH250 Programmer s Guide 165 Character code table Page 18 WPC28591 Latin 1 ...
Page 171: ...TH250 Programmer s Guide 166 Character code table Page 19 WPC28592 Latin 2 ...
Page 172: ...TH250 Programmer s Guide 167 Character code table Page 20 WPC28599 Turkish ...
Page 173: ...TH250 Programmer s Guide 168 Character code table Page 21 WPC28605 Latin 9 ...
Page 174: ...TH250 Programmer s Guide 169 Character code table Page 22 PC864 Arabic ...
Page 175: ...TH250 Programmer s Guide 170 Character code table Page 23 PC720 Arabic ...
Page 176: ...TH250 Programmer s Guide 171 Character code table Page 24 WPC1256 Arabic ...
Page 177: ...TH250 Programmer s Guide 172 Character code table Page 25 WPC28596 Arabic ...
Page 178: ...TH250 Programmer s Guide 173 Character code table Page 26 KATAKANA Asia ...
Page 179: ...TH250 Programmer s Guide 174 Character code table Page 27 PC775 Baltic ...
Page 180: ...TH250 Programmer s Guide 175 Character code table Page 28 WPC1257 Baltic ...
Page 181: ...TH250 Programmer s Guide 176 Character code table Page 29 WP28594 Baltic ...