Cognitive Solutions A799 manual Erase user flash sector, Value of n = 49 Ascii n = 1 HEX

114 Chapter 4: Programming CommandsRevision D 12/09

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.

n = 50 (ASCII n = 2) HEX 32

This command erases all sectors available for user data storage.

n = 51 (ASCII n = 3) HEX 33

This command erases all sectors available for permanent fonts.

Erases a page of flash memory and sends a carriage return when the operation is complete.

Related information

See command “Flash memory user sectors allocation” (1D 22 55 n1 n2).

See also command “Expanded flash memory allocation” (1D 22 80...) and “Select flash area” (1D 22 81 n).

Important: While erasing flash memory, the printer disables all interrupts, including communications. To provide feedback to the application, the printer responds to the application when the erase is complete. After sending the erase user flash sector (1D 40 n) command, an application should wait for the response from the printer before sending data. Otherwise, data will be lost. If an application is unable to receive data, it should wait a minimum of ten seconds after sending the erase user flash sector (1D 40 n) command before sending data.

A799-PG00001D