Instruction manual

A758 Owner’s Guide Chapter 7: Programming Guide
September 1999 203
Return Segment Number Status of Flash Memory
ASCII
:GS SOH
Hexadecimal
:1D 01
Decimal:
29 1
Returns the size of the Flash used. There may be 8, 16, or 32 sectors (64K each) in
Flash Memory. This command assures that the firmware to be downloaded is the
appropriate size for Flash Memory. The value returned is the maximum sector
number that can be accepted by the Select Sector to Download (1D 02
n
)
command.
Exceptions:
Available only in Download Mode.
Select Flash Memory Sector to Download
ASCII
: GS STX
n
Hexadecimal
: 1D 02
n
Decimal:
29 2
n
Value of
n
:
the Flash sector to which the next download operation applies
Range of
n
: 0 – 7 (512K)
0 – 15 (1 mB)
0 – 31 (2 mB)
Selects the Flash sector (nn) for which the next download operation applies. The
values of the possible sector are restricted, depending upon the Flash part type.
The printer transmits an ACK if the sector number is acceptable or an NAK if the
sector number is not acceptable. Sector numbers start at 0.
Exceptions:
Available only in Download Mode.
Get Firmware CRC
ASCII
: GS ACK
Hexadecimal
:1D 06
Decimal:
29 6
Causes the printer to calculate the CRC for the currently selected sector and
transmits the result. This is performed normally after downloading a sector to
verify that the downloaded firmware is correct. The printer also calculates the
CRC for each sector during power up and halts the program if any sector is
erroneous.
The printer transmits ACK if the calculated CRC is correct for the selected sector;
NAK if the CRC is incorrect or if no sector is selected.