QSPI SFDP Flash - Block Device

[offirko]

Hello: @bulislaw , @donatieng , @ARMmbed/mbed-os-maintainers , @dannybenor , @davidsaada . I'd appreciate your review of QSPIF Block Device

[offirko]

@maciejbocianski you're review is welcome

[maciejbocianski]

@offirko Are we going to have API for QSPI read/write mode configuration (1-1-1/1-2-2/...)? What will allow to choose what read/write speed/width we want to use

list<mode> get_supported_write_modes() from SFDP
list<mode> get_supported_read_modes() from SFDP
bool set_write_mode(mode)
bool set_read_mode(mode)

[offirko]

@maciejbocianski

Are we going to have API for QSPI read/write mode configuration (1-1-1/1-2-2/...)?

According to the design we decided not to add this flexibility. An internal logic selects the "fastest" mode from the supported ones (as described in SFDP Tables) See Section 3.5 at the design doc link: https://armh.sharepoint.com/:w:/r/sites/IoT-Project-Morpheus/Shared%20Documents/design-docs/QSPI%20Block%20Device%201.0.1.docx?d=w70bb086fb2be4d0e92c62a42040197dc&csf=1&e=2UlrqT

[offirko]

@0xc0170 , @donatieng , @davidsaada

I related to your comments and pushed changes related to them. Please re-review - thanks.

[offirko]

@0xc0170 - I added the changes related to your comments, please review - thanks.

[geky]

Out of curiousity, how much code size does the library cost?

[offirko]

@geky , Thanks for your remarks! Code size is 5Kbyte compiled with GCC_ARM