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  1. Aug 26, 2009
    • oharboe's avatar
      Michael Schwingen <rincewind@discworld.dascon.de> news about xscale · 11856bcf
      oharboe authored
      git-svn-id: svn://svn.berlios.de/openocd/trunk@2627 b42882b7-edfa-0310-969c-e2dbd0fdcd60
      11856bcf
    • oharboe's avatar
      David Brownell <david-b@pacbell.net> Clock updates/fixes for the Stellaris flash driver: · a5354ff5
      oharboe authored
       - Bugfixes:
         * internal osc: it's *12* MHz (not 15 MHz) on _current_ chips
            + except new Tempest parts where it's 16 MHz (and calibrated!)
            + or some old Sandstorm ones, where 15 MHz was valid
         * crystal config:
            + read and use the crystal config, don't assume 6 MHz
            + know when that field is 4 bits vs 5
         * an RCC2 register may be overriding the original RCC
            + more clock source options
            + bigger dividers
            + fractional dividers on Tempest (NYET handled)
         * there's a 30 KHz osc on newer chips (for deep sleep)
         * there's a 32768 Hz osc on newer chips (for hibernation)
      
       - Cosmetic
         * say "rev A0" not "vA.0", to match vendor docs
         * don't always report master clock as an "estimate":
            + give the error bound if it's approximate, like "±30%"
            + else don't say anything
         * fix whitespace and caps in some messages
         * these are not AT91SAM chips!!
      
      Those clock issues might explain problems sometimes reported when
      writing to Stellaris flash banks; they affect write timings.
      
      That 12-vs-15 MHz issue is problematic; there's no consolidated doc
      showing which chips (and revs!) have which internal oscillator speed.
      It's clear that only older silicon had the faster-and-less-accurate
      flavor.  What's less clear is which chips are "old" like that.
      
      Lightly tested, on a DustDevil part.
      
      git-svn-id: svn://svn.berlios.de/openocd/trunk@2626 b42882b7-edfa-0310-969c-e2dbd0fdcd60
      a5354ff5
  2. Aug 25, 2009
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