Chapter 6: Programming Information | A794 Owner’s Guide |
Select Flash Memory Sector to Download
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
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 |
Exceptions
Available only in download mode.
Get Firmware CRC
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.
ASCII | GS ACK |
Hexadecimal | 1D 06 |
Decimal | 29 6 |
Return Boot Sector CRC
Returns the CRC calculated over the boot sector code space.
ASCII | GS BEL |
Hexadecimal | 1D 07 |
Decimal | 29 7 |
Formulas
ACK <low byte> <high byte>
124 | March 1999 |