[Trac #143] olpcflash verify fails with "SST" flash part

Zarro Boogs per Child bugtracker at laptop.org
Tue Oct 10 19:35:21 EDT 2006


#143: olpcflash verify fails with "SST" flash part
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 Reporter:  cjb       |        Owner:  rsmith 
     Type:  defect    |       Status:  new    
 Priority:  blocker   |    Milestone:  BTest-1
Component:  hardware  |   Resolution:         
 Keywords:            |  
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Comment (by jg):

 rsmith says:

 Bricked one board so far 3 to go.  :)

 The sst part is more different than I orginally realized. I can now erase
 sectors.  (thus how I created the brick)

 There is no page write command on this part.  Instead you put it into auto
 inc mode and you send it words at a time it programs and then increments
 the address.  I can still do this a "page" at a time but the mechanics
 inside the write routine are totally different.

 So I have to have 2 seperate write routines.  I've got the new write
 routine done and the framework to select it in place but hiletesting early
 this morning I found that:

 1) The ID data does not seem to pop out fo the chip in the order the
 datasheet says it should and

 2) The spansion part dosen't support the JDEC ID command.  So I need
 to rework the part ID code to use the alternate RDID command which issort
 of mfg specific.

 Then finish up the testing of the new SST write method.

 I'm very interested in the progress Mitch makes on the SPI recovery
 tool for BTest boards.

-- 
Ticket URL: <http://dev.laptop.org/ticket/143#comment:4>
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