SPI flash driver

SPI flash driver

[Jürgen Lambrecht]

Hello,

We will develop a SPI flash package for a Numonyx M25P80.
We will base it on 
ecos\packages\devs\flash\atmel\dataflash\current\cdl\devs_flash_atmel_dataflash.cdl.
And make this: ecos\packages\devs\flash\numonyx\spiflash\...

Is it OK to do it this way?

Kind regards,
Jürgen

Re: SPI flash driver

[jerzy dyrda]

Hello Jürgen,

On Tuesday 11 May 2010 14:49:38 Jürgen Lambrecht wrote:

> We will develop a SPI flash package for a Numonyx M25P80.

AFAIK those flashes are already supported ->
devs/flash/spi/m25pxx

static const m25pxx_params m25pxx_supported_devices [] = {
  { // Support for Numonyx 128 MBit devices.
    sector_size  : 1024,
    sector_count : 64,
    jedec_id     : 0x00202018
  },
  { // Support for Numonyx 64 MBit devices.
    sector_size  : 256,
    sector_count : 128,
    jedec_id     : 0x00202017
  },
  { // Support for Numonyx 16 MBit devices.
    sector_size  : 256,
    sector_count : 64,
    jedec_id     : 0x00202016
  },
  { // Support for Numonyx 16 MBit devices.
    sector_size  : 256,
    sector_count : 32,
    jedec_id     : 0x00202015
  },
  { // Support for Numonyx 8 MBit devices.
    sector_size  : 256,
    sector_count : 16,
    jedec_id     : 0x00202014
	^^^^^^^^^^^^^^^^
	this one is yours
  },
  { // Support for Numonyx 4 MBit devices.
    sector_size  : 256,
    sector_count : 8,
    jedec_id     : 0x00202013
  },
  { // Support for Numonyx 2 MBit devices.
    sector_size  : 256,
    sector_count : 4,
    jedec_id     : 0x00202012
  },
  { // Support for Numonyx 1 MBit devices.
    sector_size  : 128,
    sector_count : 4,
    jedec_id     : 0x00202011
  },
  { // Support for Numonyx 512 KBit devices.
    sector_size  : 128,
    sector_count : 2,
    jedec_id     : 0x00202010
  },
  { // Null terminating entry.
    sector_size  : 0,
    sector_count : 0,
    jedec_id     : 0
  }
};

-- 
Miłego dnia / Best regards
Jerzy

Re: SPI flash driver

[Nick Garnett]

Jürgen Lambrecht <J.Lambrecht@televic.com> writes:

> Hello,
> 
> We will develop a SPI flash package for a Numonyx M25P80.
> We will base it on
> ecos\packages\devs\flash\atmel\dataflash\current\cdl\devs_flash_atmel_dataflash.cdl.
> And make this: ecos\packages\devs\flash\numonyx\spiflash\...
> 
> Is it OK to do it this way?

There is already a driver for the M25Pxx family in

ecos/packages/devs/flash/spi/m25pxx.

It was developed for the STM32 Cortex-M3 port, but should be easy to
use on any other target. I believe the driver already supports all
current M25Pxx parts, including the M25P80.


-- 
Nick Garnett                                      eCos Kernel Architect
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