Use this library supports:

• One SPI-norflash chip connected to a normal 1xSPI port of a RP2030/RP2350
• Up to 128Mbit flash memory

Commands

norflash_init(...) :

To be called before the library can be used, to set baudrate and initialize.

norflash_chip_erase() :

Full chip erase.

norflash_write_page(...) :

Blocking page write, write up 256 bytes with one functions call.

norflash_read_blocking(...) :

Blocking read to a given buffer.

repeated async read -> 3 functions:

norflash_start_async_read(...) :

Read a data-structure of a given length to a given buffer. This is done for a given number of times. Use a given callback function to process the data every time a new data-structure is read. The buffer will be overwritten every time.

norflash_next_async_read() :

Used to request the next data-structure to be read and to end en cleanup a async read. This function is mandatory in the callback function even if single repetition.

norflash_abort_async_read() :

stop early.

console Commands

norflash_from_console()

Start listening to console instructions to Read, Write, Erase norflash. This mode is a blocking loop.

All <values> are exchanged as lowercase asci hex-digits:

• <adr> and <len> are 3 bytes (6 hex-digits).
• <data[ ]> is a string of bytes (2 hex-digits per byte)
• No spaces are allowed in between values or data bytes.

R, W, S, O , Q commands (uppercase)

• R<adr><len> : Read from address,
• W<adr><data[ ]>S : Write up to one page. (don't forget the 'S' to stop/terminate the data )
• O<adr><len> : Obliterate / erase , only full erase supported <adr>=0 , <len>=0
• Q : quit norflash_from_console loop