Select Flash Area For Storing Logos And User-Defined Characters; Erase User Flash Sector - CognitiveTPG A776 Programming Manual

124 Chapter 5: Programming commands
Values and ranges:
s = the number of dot rows in the character cell (maximum 64)
c = the ASCII codes of the first (c1) and last (c2) characters respectively
c1 = Hex 20–FF (20 is always printed as a space)
c2 = Hex 20–FF (20 is always printed as a space)
To define only one character, use the same code for both c1 and c2
j = s/8 = the number of bytes (vertically) in the character cell
k = c2 – c1 + 1 = the number of characters to be defined in this command string
[character i data] = [ni d1 ... d(j x ni)] for 1 ≤ i ≤ k
ni = the number of dot columns for the ith character, 1 ≤ ni ≤ 16
d = the dot data for the characters
The number of bytes for the ith character cell is j x ni.
The bytes are printed down and across each cell.
See the illustration.
Defines and enters downloaded characters into RAM. The command may be used to overwrite single characters. User-
defined characters are available until power is turned off or the Initialize Printer command (1B 40) is received.
Any invalid byte (s, c1, c2, n1, n2) aborts the command.
er data storage area
1D 22 80 33 nL nH
1D 22 80 34 nL nH
1D 22 80 40
n = 0xFFFF means allocate all remaining sectors to this area; only one area can specify this parameter value.

Select flash area for storing logos and user-defined characters

ASCII
GS" 0x81
Hexadecimal
1D 22 81 n
Decimal 29 34 129 n
Value of n:
n specifies
n = 0 select logo/font flash
n = 1 select permanent font flash
n > 1 reserved
Logos and user-defined characters can be stored in either flash area.

Erase user flash sector

ASCII
GS @ n
Hexadecimal
1D 40 n
Decimal 29 64 n
Value of n:
49 – 51
n = 49 (ASCII n = 1) HEX 31
This command erases all 64K flash memory sectors allocated to user-defined character and logos storage. Those
sectors should be erased in two situations: when the logo definition area is full and an application is attempting to
define new logos, and when an application wants to replace one user-defined character set with another. In both
cases, all logos and character set definitions are erased and must be redefined.
Continued . . .
A776 (B780) Programming Guide
n sectors to permanent font area
n sectors to electronic journal area
end expanded flash memory allocation sequence
A776-PG00001 C 12/09