Revision D 12/09Chapter 4: Programming Commands 117
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>