[Bug 1001850] New: Flash Driver for Cypress FM25VXX FRAM

[Bug 1001850] New: Flash Driver for Cypress FM25VXX FRAM

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            Bug ID: 1001850
           Summary: Flash Driver for Cypress FM25VXX FRAM
           Product: eCos
           Version: unknown
            Target: freescale_twr_k60n512 (Freescale Kinetis TWR-K60N512)
  Architecture/Host Cortex-M
                OS:
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: low
         Component: Flash
          Assignee: unassigned@bugs.ecos.sourceware.org
          Reporter: mjones@linear.com
                CC: ecos-bugs@ecos.sourceware.org

Created attachment 2239
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2239&action=edit
Cypress Flash support for FM25VXX FRAM on Kinetis

This is a working driver for Cypress FM25VXX FRAM for Kinetis K60 FXM.

Several things to note about its current status:

- Supports 256kB, 512KB, 1MB devices (tested with 512KB device)

- FRAM has no blocks, so the flash API is implemented as a single block device.

- Erase is implemented by writing 0xFF. It is not very time efficient, but it
is very memory efficient. If one really wants to erase, it will be much faster
to write 0xFF from your own larger buffer.

- It has a CDL setting to control the write block size if desired.

- It works with SPI polled mode, but does not completely work with SPI DMA
mode. A write followed by a read produces read data that has one 0x00 byte at
the beginning. This seems to be related to the underlying SPI code.

- The test code has been run in other application files and should work, but
the erase will be very slow. You can comment the erase and it should run. The
code is just a tweaked version of SST25 test code.

- Normal READ mode tested. FAST READ mode not tested.

- It has been used with an existing application and is reliable in polled mode
with normal READ mode.

- With the SPI speed set to 25Mhz, the actual frequency is 12.5Mhz. Increasing
SPI setting has no effect.

Issues that need resolving:

- DMA function
- SPI frequency
- Block erase strategy
- More testing

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2239|0                           |1
        is obsolete|                            |

--- Comment #1 from Mike Jones <mjones@linear.com> ---
Created attachment 2242
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2242&action=edit
Updated patch against latest CVS

This patch was made with the latest CVS. It also has a small fix in a #define.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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--- Comment #2 from Mike Jones <mjones@linear.com> ---
Actually, it was an #ifdef in fm25vxx_freescale_dspi.c


+#ifdef CYGHWR_DEVS_FLASH_FM25VXX_DEV0_SPI_USE_DBR
+# define FM25VXX_SPI_DBR_DEV0 1
+#else
+# define FM25VXX_SPI_DBR_DEV0 0
+#endif

CYGHWR_DEVS_FLASH_FM25VXX_DEV0_SPI_USE_DBR was incorrect. It was copied from
SST25 driver and that was also incorrect and I have put in a bugzilla fix for
it.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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--- Comment #4 from Mike Jones <mjones@linear.com> ---
Created attachment 2254
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2254&action=edit
ecos.db patch

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2242|0                           |1
        is obsolete|                            |

--- Comment #3 from Mike Jones <mjones@linear.com> ---
Created attachment 2253
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2253&action=edit
Main Patch

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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--- Comment #5 from Mike Jones <mjones@linear.com> ---
Comment on attachment 2253
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2253
Main Patch

This patch now includes support for ST25XX and FM25XX on the TWR-K70F120M

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2253|0                           |1
        is obsolete|                            |

--- Comment #6 from Mike Jones <mjones@linear.com> ---
Created attachment 2271
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2271&action=edit
Core Patch

Replacing the patch after fixing a problem with it. No functional changes. Just
removed some garbage.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001850

Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2254|0                           |1
        is obsolete|                            |

--- Comment #7 from Mike Jones <mjones@linear.com> ---
Created attachment 2272
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2272&action=edit
Ecos DB Patch

Replacing just in case I fixed this one too. Noticed the file date changed.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001850

Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2254|0                           |1
        is obsolete|                            |

--- Comment #7 from Mike Jones <mjones@linear.com> ---
Created attachment 2272
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2272&action=edit
Ecos DB Patch

Replacing just in case I fixed this one too. Noticed the file date changed.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001850

Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2253|0                           |1
        is obsolete|                            |

--- Comment #6 from Mike Jones <mjones@linear.com> ---
Created attachment 2271
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2271&action=edit
Core Patch

Replacing the patch after fixing a problem with it. No functional changes. Just
removed some garbage.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

[bugzilla-daemon]

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001850

--- Comment #5 from Mike Jones <mjones@linear.com> ---
Comment on attachment 2253
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2253
Main Patch

This patch now includes support for ST25XX and FM25XX on the TWR-K70F120M

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001850

Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2242|0                           |1
        is obsolete|                            |

--- Comment #3 from Mike Jones <mjones@linear.com> ---
Created attachment 2253
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2253&action=edit
Main Patch

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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--- Comment #4 from Mike Jones <mjones@linear.com> ---
Created attachment 2254
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2254&action=edit
ecos.db patch

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

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--- Comment #2 from Mike Jones <mjones@linear.com> ---
Actually, it was an #ifdef in fm25vxx_freescale_dspi.c


+#ifdef CYGHWR_DEVS_FLASH_FM25VXX_DEV0_SPI_USE_DBR
+# define FM25VXX_SPI_DBR_DEV0 1
+#else
+# define FM25VXX_SPI_DBR_DEV0 0
+#endif

CYGHWR_DEVS_FLASH_FM25VXX_DEV0_SPI_USE_DBR was incorrect. It was copied from
SST25 driver and that was also incorrect and I have put in a bugzilla fix for
it.

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[Bug 1001850] Flash Driver for Cypress FM25VXX FRAM

[bugzilla-daemon]

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001850

Mike Jones <mjones@linear.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #2239|0                           |1
        is obsolete|                            |

--- Comment #1 from Mike Jones <mjones@linear.com> ---
Created attachment 2242
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2242&action=edit
Updated patch against latest CVS

This patch was made with the latest CVS. It also has a small fix in a #define.

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You are receiving this mail because:
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