Cognitive Solutions A799 manual Flash memory user sectors allocation

112 Chapter 4: Programming CommandsRevision D 12/09

Select memory type (SRAM/flash) where to save logos or user-defined fonts

ASCII	GS “ n
Hexadecimal	1D 22 n
Decimal	29 34 n
Value of n:	48 – 53

n = 48 (ASCII n = 0) HEX 30

Loads active logo to RAM only. This is used to print a special logo but not have it take up flash memory. A logo defined following this command is not preserved over a power cycle. The printer disables interrupts while writing to flash. Any command that cause data to be written to flash should be followed by a 50 Msec delay to allow significant time for the write operation.

n = 49 (ASCII n = 1) HEX 31

Loads active logo to flash memory. This is the default condition for logo flash storage. A logo defined following this command is stored in flash memory.

n = 50 (ASCII n = 2) HEX 32

Loads user-defined characters to RAM only. This is the default condition for user-defined character storage. Any user- defined characters defined following this command are not preserved over a power cycle.

n = 51 (ASCII n = 3) HEX 33

Loads user-defined characters to flash memory. An application must use this command to store user-defined characters in flash memory. Any user-defined characters defined following this command are stored in flash memory. A user-defined character cannot be redefined in flash memory. The flash memory page must be erased by an application before redefining user-defined characters. For more information, see the erase user flash sector (1D 40 n) command.

Specifies whether to load the logos or user-defined characters to logo/font flash memory or to RAM (volatile memory). The selection remains in effect until it is changed via this command or until the power cycles. To specify permanent font flash, also send 1D 22 81 01.

Related information

This command is recognized in A799 native mode. In A793 and LEGACY emulations, parameter bytes go into the print buffer.

Flash memory user sectors allocation

ASCII	GS “ U n1 n
Hexadecimal	1D 22 55 n1 n2
Decimal	29 34 85 n1 n2
Default Value of n1:		1 (see below)
Default Value of n2:		1 (see below)

n1 is the number of 64k sectors used for logos and user-defined characters. n2 is the number of 64k sectors used for user data storage.

n1 + n2 <= 6 (dec) (1M)

n1 + n2 <= 22 (dec) 16 (hex) (2M)

If n1 + n2 is greater than the maximum number of sectors available, the command is ignored. The printer returns NACK. Issuing this command with parameters different from current parameters will erase all sectors. The printer returns ACK. Issuing this command with parameters the same as current parameters will do nothing. The printer returns ACK.

Note: Flash memory is made up of user and program code. Therefore, the available flash memory space will vary with the amount of program code utilized.

A799-PG00001D