122 Chapter 5: Programming commands

Read from user data storage

ASCII

ESC 4 m a0 a1 a2

Hexadecimal

1B 34 m a0 a1 a2

Decimal

27 52 m a0 a1 a2

Value of m:

0 – 255

Reads m bytes of data from the user data storage flash page at the address specified. Returns m bytes to the application, followed by a carriage return (0Dh).

The high order byte of the address (a0) ranges from 0 to n2–1, with n2 specified in the flash allocation command. If the flash allocation command has been used, the a0 = 0 always.

Read from non-volatile memory

ASCII

ESC j k

Hexadecimal

1B 6A k

Decimal

27

106 k

Range of k:

20

– 63 (decimal)

Reads a two-byte word from location k in the history EEROM. The printer returns the word at the next available opportunity.

Write to non-volatile memory (NVRAM)

ASCII

ESC s n1 n2 k

Hexadecimal

1B 73 n1 n2 k

Decimal

27 115 n1 n2 k

Value of n1:

1st Byte

Value of n2:

2nd Byte

Range of k:

20 – 63 (decimal locations)

Writes the two-byte word, n1 n2, to location k in history EEROM.

Select memory type (SRAM/flash)

Use this memory 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 command is stored in flash

memory. This is the default condition for logo flash storage. A logo defined following this 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.

Continued . . .

A776 (B780) Programming Guide

A776-PG00001 C 12/09

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Image 134
Cognitive Solutions B780 Read from user data storage, Read from non-volatile memory, Write to non-volatile memory Nvram

B780, A776 specifications

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