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P8X32A/Propeller driver object for 23xxxx-series SRAM chips

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avsa242/23xxxx-spin

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23xxxx-spin


This is a P8X32A/Propeller driver object for 23xxxx-series SRAM

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 20MHz W / 10MHz R (P1), up to 20MHz W / 20MHz R (P2)
  • Operations for reading and writing a single byte, up to a 32-byte page, or multiple bytes across page boundaries

Requirements

P1/SPIN1:

  • spin-standard-library
  • 1 extra core/cog for the PASM SPI engine
  • memory.common.spinh (provided by spin-standard-library)

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 (6.9.4) Bytecode OK
P1 SPIN1 FlexSpin (6.9.4) Native/PASM OK
P2 SPIN2 FlexSpin (6.9.4) NuCode Untested
P2 SPIN2 FlexSpin (6.9.4) Native/PASM2 OK

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

Hardware Compatibility

  • Tested with Microchip 23LC1024 (may work with similar ONSemi and ISSI parts)

Limitations

  • Single-lane SPI only (i.e., no DSPI, QSPI)