User Data Storage; Write To User Data Storage; Read From User Data Storage; Read From Non-Volatile Memory - CognitiveTPG A776 ColorPOS Programming Manual

User data storage

Write to user data storage

ASCII
ESC ' m a0 a1 a2 d1 ... dm
Hexadecimal 1B 27 m a0 a1 a2 d1 ... dm
Decimal
27 39 m a0 a1 a2 d1 ... dm
Value of m: 0 – 255
Writes m bytes of data to the user data storage flash page at the address specified. The printer waits for m bytes of data
following the 3-byte address, addr.
If any of the memory locations addressed by this command are not currently erased, the command is not executed.
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.

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:
1 Byte
st
Value of n2: 2 Byte
nd
Range of k:
20 – 63 (decimal locations)
Writes the two-byte word, n1 n2, to location k in history EEROM.
A776-PG00001 D 07/13
Chapter 5: Programming commands
A776 (B780) Programming Guide
119