CognitiveTPG A798 - Manual (Page 101)

Chapter 4: Programming Commands 101 Revision C 12/09
A798-PG00001C
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 16 (1 Meg) or 32 (2 Meg) sectors 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 nn) command.
Exceptions
Available only in download mode.
Select flash memory sector to download
ASCII GS STX nn
Hexadecimal 1D 02 nn
Decimal 29 2 nn
Value of n: The flash sector to which the next download operation applies
Range of n: 0
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.
Return microprocessor CRC
ASCII GS BEL
Hexadecimal 1D 07
Decimal 29 7
Returns the CRC calculated over the boot sector code space.
Formulas
ACK <low byte> <high byte>
Erase all flash contents except boot sector
ASCII GS SO
Hexadecimal 1D 0E
Decimal 29 14
Causes the entire flash memory to be erased.
The printer returns ACK if the command is successful; NAK if it is unsuccessful.
Exceptions
Available only in download mode.