[avr-libc-dev] [bug #25929] boot.h Fuse read not compatible with Tiny48/88.

[Bob Paddock]

URL:
  <http://savannah.nongnu.org/bugs/?25929>

                 Summary: boot.h Fuse read not compatible with Tiny48/88.
                 Project: AVR C Runtime Library
            Submitted by: bpaddock
            Submitted on: Thu 19 Mar 2009 08:45:38 AM EDT
                Category: Library
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: libc code
                  Status: None
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 1.6.5
           Fixed Release: None

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Details:



boot_lock_fuse_bits_get() Assumes that BLBSET is defined.

In the Tinyx8 RLFB is used, not BLBSET:

SPMCSR – Store Program Memory Control and Status Register
"Bit 3 – RFLB: Read Fuse and Lock Bits An LPM instruction within
three cycles after RFLB and SELFPRGEN are set in the SPMCSR
Register, will read either the Lock bits or the Fuse
bits (depending on Z0 in the Z-pointer) into the destination
register. See 'Reading the Fuse and Lock Bits from Software' on
page 176 for details."





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