avsa242/25xxxx-spin

P2X8C4M64P/Propeller 2 driver object for 25xxxx-series flash chips

25xxxx-spin

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This is a P2X8C4M64P/Propeller 2 driver object for 25xxxx-series flash memories

IMPORTANT: This software is meant to be used with the spin-standard-library (P8X32A) or p2-spin-standard-library (P2X8C4M64P). Please install the applicable library first before attempting to use this code, otherwise you will be missing several files required to build the project.

Salient Features

• SPI connection at up to 25MHz (tested at up to 300MHz fSYS - may work at higher SPI clocks - YMMV)
• Read device ID, Mfr. ID, JEDEC ID
• Read, write a byte
• Read, write a block (write limited to a page per transaction - 256 bytes)
• Erase a sector (4kB), 32kB block, 64kB block, entire chip
• Read busy flag

Requirements

P2/SPIN2:

• p2-spin-standard-library
• memory.common.spin2h (provided by p2-spin-standard-library)

Compiler Compatibility

Processor	Language	Compiler	Backend	Status
P1	SPIN1	FlexSpin (6.1.1)	Bytecode	Not yet implemented
P1	SPIN1	FlexSpin (6.1.1)	Native/PASM	Not yet implemented
P2	SPIN2	FlexSpin (6.1.1)	NuCode	FTBFS
P2	SPIN2	FlexSpin (6.1.1)	Native/PASM2	OK

(other versions or toolchains not listed are not supported, and may or may not work)

Limitations

• Single-lane SPI only (no Dual-SPI or Quad-SPI - unplanned, for now)
• SPI driver is relatively slow, compared to memory's capability; not suitable for high-performance applications
• Tested only with Winbond W25Q128