118 Chapter 4: Programming CommandsRevision D 12/09

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.

Return main program flash CRC

ASCII

GS SI

Hexadecimal

1D 0F

Decimal

29 15

Returns the CRC calculated over the flash firmware code space.

The format of the response is ACK <low byte> <high byte>.

Erase selected flash sector

ASCII

GS DLE n

Hexadecimal

1D 10 n

Decimal

29 16 n

Value and range of n:

0–7 = 512k bytes flash 0–15 = 1M bytes flash 0–31 = 2M bytes flash

Erases the previously selected sector. The printer transmits ACK when the sector has been erased. If the previous sector is not successfully erased, or if no sector was selected, the printer transmits NAK.

Exceptions

Available only in download mode.

Download to active flash sector

ASCII

GS DC1 aL aH cL cH d1… dn

 

 

Hexadecimal

1D 11 aL aH cL cH d1… dn

 

 

Decimal

29 17 aL aH cL cH d1… dn

 

 

Value of aL:

low byte of the address

 

 

Value of aH:

high byte of the address

 

 

Value of cL:

low byte of the count

 

 

Value of cH:

high byte of the count

 

 

Value of d:

data bytes, 0–255

 

 

 

 

 

Value of n (for number of data bytes)

Range of address (aL aH)

Range of count (cL cH)

((cH * 256) + cL)

 

0000–FFFF (hexadecimal)

0001–FFFF (hexadecimal)

Range:

Addresses run from 0 to 64K.

 

Contains a start address (aH x 256 + aL) and count (cH x 256 + cL) of binary bytes to load into the selected sector, followed by that many bytes. The start address is relative to the start of the sector. Addresses run from 0 to 64K.

The count must always be 256.

The printer may return one of several responses. ACK means that the data was written correctly and the host should transmit the next block. NAK means that, for some reason, the data was not written correctly. This could mean that

A799-PG00001D

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Cognitive Solutions A799 manual Erase all flash contents except boot sector, Return main program flash CRC