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Remove the "safemode" feature.

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This feature has been designed with the sometimes quite flakey direct
(parallel or serial port attached) bitbang programming adapters in
mind that were quite common about two decades ago.

With parallel ports vanishing from modern PCs almost completely, and
the advent of various USB-attached low-cost programming devices,
this class of programmers disappeared almost completely.

Furthermore, the fuse combinations that were covered by the feature
are no longer around on all recent AVR devices, so for an ever
increasing number of devices, safemode already became meaningless and
was turned off anyway.

With the prospective version 7.x release, it's a good point in time to
introduce a major change like this one.
This commit is contained in:
Joerg Wunsch
2022-01-31 20:44:32 +01:00
parent e28e28d7c3
commit 8c6c6a14ec
13 changed files with 5 additions and 688 deletions
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29
src/avrdude.1
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@@ -607,40 +607,11 @@ Posix systems (by now).
.It Fl q
Disable (or quell) output of the progress bar while reading or writing
to the device. Specify it a second time for even quieter operation.
.It Fl s
Disable safemode prompting. When safemode discovers that one or more
fuse bits have unintentionally changed, it will prompt for
confirmation regarding whether or not it should attempt to recover the
fuse bit(s). Specifying this flag disables the prompt and assumes
that the fuse bit(s) should be recovered without asking for
confirmation first.
.It Fl t
Tells
.Nm
to enter the interactive ``terminal'' mode instead of up- or downloading
files. See below for a detailed description of the terminal mode.
.It Fl u
Disable the safemode fuse bit checks. Safemode is enabled by default
and is intended to prevent unintentional fuse bit changes. When
enabled, safemode will issue a warning if the any fuse bits are found
to be different at program exit than they were when
.Nm
was invoked. Safemode won't alter fuse bits itself, but rather will
prompt for instructions, unless the terminal is non-interactive, in
which case safemode is disabled. See the
.Fl s
option to disable safemode prompting.
.Pp
If one of the configuration files has a line
.Dl "default_safemode = no;"
safemode is disabled by default.
The
.Fl u
option's effect is negated in that case, i. e. it
.Em enables
safemode.
.Pp
Safemode is always disabled for AVR32, Xmega and TPI devices.
.It Xo Fl U Ar memtype Ns
.Ar \&: Ns Ar op Ns
.Ar \&: Ns Ar filename Ns