-#LyX 1.4.4 created this file. For more info see http://www.lyx.org/
+#LyX 1.4.5 created this file. For more info see http://www.lyx.org/
\lyxformat 245
\begin_document
\begin_header
\begin_layout Date
\size normal
-SDCC 2.7.3
+SDCC 2.8.5
\size footnotesize
\newline
-$Date:: $
+$Date: 2008-11-16#$
\newline
-$Revision$
+$Revision: 5272$
\end_layout
\begin_layout Standard
\end_inset
- functions are casted to int unless explicitly casted
+ functions are casted to int unless explicitly casted and
+\series bold
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c89
+\begin_inset LatexCommand \index{-\/-std-c89}
+
+\end_inset
+
+
+\series default
+and
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c99
+\begin_inset LatexCommand \index{-\/-std-c99}
+
+\end_inset
+
+
+\series default
+ command line option are not defined
\begin_inset Marginal
status collapsed
\family default
\newline
- will push a as an int and as a char resp.
+ will push a as an int and as a char resp if
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c89
+\begin_inset LatexCommand \index{-\/-std-c89}
+
+\end_inset
+
+
+\series default
+and
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c99
+\begin_inset LatexCommand \index{-\/-std-c99}
+
+\end_inset
+
+
+\series default
+ command line options are not defined,
+\newline
+ will push a as two ints if
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c89
+\begin_inset LatexCommand \index{-\/-std-c89}
+
+\end_inset
+
+
+\series default
+or
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c99
+\begin_inset LatexCommand \index{-\/-std-c99}
+
+\end_inset
+
+
+\series default
+ command line option is defined.
\end_layout
\begin_layout Itemize
In previous versions, both forms would have toggled the bit.
\end_layout
+\begin_layout Itemize
+in older versions, the preprocessor was always called with
+\series bold
+-
+\begin_inset ERT
+status collapsed
+
\begin_layout Standard
-\emph on
-<pending: more incompatibilities?>
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c99
+\begin_inset LatexCommand \index{-\/-std-c99}
+
+\end_inset
+
+
+\series default
+ regardless of the
+\series bold
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-xxx
+\series default
+ setting.
+ This is no longer true, and can cause compilation failures on code built
+ with
+\series bold
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c89
+\begin_inset LatexCommand \index{-\/-std-c89}
+
+\end_inset
+
+
+\series default
+ but using c99 preprocessor features, such as one-line (//) comments
+\end_layout
+
+\begin_layout Itemize
+in versions older then 2.8.4 the pic16 *printf() and printf_tiny() library
+ functions supported undocumented and not standard compliant 'b' binary
+ format specifier ("%b", "%hb" and "%lb").
+ The 'b' specifier is now disabled by default.
+ It can be enabled by defining BINARY_SPECIFIER macro in files device/lib/pic16/
+libc/stdio/vfprintf.c and device/lib/pic16/libc/stdio/printf_tiny.c and recompilin
+g the library.
+\end_layout
+
+\begin_layout Itemize
+in versions older then 2.8.5 the unnamed bitfield structure members participated
+ in initialization, which is not conforming with ISO/IEC 9899:1999 standard
+ (see section Section 6.7.8 Initialization, clause 9)
+\newline
+
+\newline
+Old behavior, before
+ version 2.8.5:
+\family typewriter
+
+\newline
+\InsetSpace ~
+\InsetSpace ~
+struct {
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+int a : 2;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+char\InsetSpace ~
+ : 2;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+int b : 2;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+} s = {1, 2, 3};
+\family default
+
+\newline
+
+\family typewriter
+/* s.a = 1, s.b = 3 */
+\family default
+
+\newline
+
+\newline
+New behavior:
+\family typewriter
+
+\newline
+\InsetSpace ~
+\InsetSpace ~
+struct {
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+int a : 2;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+char\InsetSpace ~
+ : 2;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+int b : 2;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+} s = {1, 2};
+\family default
+
+\newline
+
+\family typewriter
+/* s.a = 1, s.b = 2 */
\end_layout
\begin_layout Section
Lower runtime footprint.
\end_layout
+\begin_layout List
+\labelwidthstring 00.00.0000
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-without-ccache Do not use ccache even if available
+\end_layout
+
\begin_layout Standard
Furthermore the environment variables CC, CFLAGS, ...
the tools and their arguments can be influenced.
./configure CC=gcc2 CXX=g++2
\end_layout
+\begin_layout Standard
+Universal (ppc and i386) binaries can be produced on Mac OS X 10.4.x with
+ Xcode.
+ Run 'configure' with:
+\end_layout
+
+\begin_layout LyX-Code
+./configure
+\backslash
+
+\end_layout
+
+\begin_layout LyX-Code
+LDFLAGS="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch
+ ppc"
+\backslash
+
+\end_layout
+
+\begin_layout LyX-Code
+CXXFLAGS = "-O2 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch
+ ppc"
+\backslash
+
+\end_layout
+
+\begin_layout LyX-Code
+CFLAGS = "-O2 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -arch ppc"
+\end_layout
+
\begin_layout Subsection
Cross compiling SDCC on Linux for Windows
\end_layout
\end_inset
+
+\begin_inset LatexCommand \label{lyx:-Wl option}
+
+\end_inset
+
...
Pass the linkOption to the linker.
If a bootloader is used an option like
\end_inset
would be typical to set the start of the code segment.
+ Either use the double quotes around this option or use no space (e.g.
+ -Wl-bCSEG=0x1000).
See also #pragma constseg and #pragma codeseg in section
\begin_inset LatexCommand \ref{sec:Pragmas}
\begin_layout List
\labelwidthstring 00.00.0000
+\series bold
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-no-std-crt0
+\series default
+
+\begin_inset LatexCommand \index{Z80!Options!-\/-no-std-crt0}
+
+\end_inset
+
+ When linking, skip the standard crt0.o object file.
+ You must provide your own crt0.o for your system when linking.
+\end_layout
+
+\begin_layout List
+\labelwidthstring 00.00.0000
+
\series bold
-bo
\series default
\begin_layout Standard
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-Werror
+\begin_inset LatexCommand \index{-\/-Werror}
+
+\end_inset
+
+
+\series default
+ Treat all warnings as errors.
+\end_layout
+
+\begin_layout List
+\labelwidthstring 00.00.0000
+
+\series bold
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
\backslash
/
\end_layout
\end_inset
+
+\begin_inset LatexCommand \label{lyx:-codeseg}
+
+\end_inset
+
\InsetSpace ~
<Name> The name to be used for the code
\begin_inset LatexCommand \index{code}
\end_inset
+\end_layout
+
+\begin_layout Section
+Other SDCC language extensions
+\begin_inset LatexCommand \index{Other SDCC language extensions}
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+Binary constants
+\end_layout
+
+\begin_layout Standard
+SDCC supports the use of binary constants, such as 0b01100010.
+ This feature is only enabled when the compiler is invoked using --std-sdccxx.
+\end_layout
+
+\begin_layout Standard
+\begin_inset VSpace bigskip
+\end_inset
+
+
\end_layout
\begin_layout Section
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
+orl a,#(l_PSEG
+ >> 8)
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
jz 00006$
\newline
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
-mov
- r1,#s_PSEG
+mov r1,#s_PSEG
\newline
\InsetSpace ~
\InsetSpace ~
clr a
\newline
00005$:\InsetSpace ~
-movx @r1,a
+movx
+ @r1,a
\newline
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
djnz r0,00005$
\newline
-0
-0006$:
+00006$:
\newline
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
-orl a,#(l_XSEG >> 8)
+orl a,#(l_XSEG >>
+ 8)
\newline
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
-mov r1,#((l_XSEG
- + 255) >> 8)
+mov r1,#((l_XSEG + 255) >> 8)
\newline
\InsetSpace ~
\InsetSpace ~
clr a
\newline
00007$:\InsetSpace ~
-movx @dptr,a
+movx
+ @dptr,a
\newline
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
\InsetSpace ~
-djnz
- r1,00007$
+djnz r1,00007$
\newline
00008$:
\end_layout
\end_inset
about MCS51-variants.
+\newline
+
+\end_layout
+
+\begin_layout Standard
+While these initialization modules are meant as generic startup code there
+ might be the need for customization.
+ Let's assume the return value of
+\emph on
+_sdcc_external_startup()
+\emph default
+ in
+\emph on
+crtstart.asm
+\emph default
+ should not be checked (or
+\emph on
+_sdcc_external_startup()
+\emph default
+ should not be called at all).
+ The recommended way would be to copy
+\emph on
+crtstart.asm
+\emph default
+ (f.e.
+ from
+\begin_inset LatexCommand \url{http://sdcc.svn.sourceforge.net/viewvc/*checkout*/sdcc/trunk/sdcc/device/lib/mcs51/crtstart.asm}
+
+\end_inset
+
+) into the source directory, adapt it there, then assemble it with
+\emph on
+asx8051 -plosgff
+\begin_inset Foot
+status open
+
+\begin_layout Standard
+\begin_inset Quotes sld
+\end_inset
+
+-plosgff
+\begin_inset Quotes srd
+\end_inset
+
+ are the assembler options used in
+\begin_inset LatexCommand \url{http://sdcc.svn.sourceforge.net/viewvc/sdcc/trunk/sdcc/device/lib/mcs51/Makefile.in?view=markup }
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+
+ crtstart.asm
+\emph default
+ and when linking your project explicitely specify
+\emph on
+crtstart.rel
+\emph default
+.
+ As a bonus a listing of the relocated object file
+\emph on
+crtstart.rst
+\emph default
+ is generated.
+\end_layout
+
+\begin_layout Standard
\begin_inset VSpace bigskip
\end_inset
\begin_layout Standard
\begin_inset Tabular
-<lyxtabular version="3" rows="11" columns="2">
+<lyxtabular version="3" rows="15" columns="2">
<features>
<column alignment="left" valignment="top" leftline="true" width="3in">
<column alignment="left" valignment="top" leftline="true" rightline="true" width="3in">
\end_inset
</cell>
</row>
-<row topline="true" bottomline="true">
+<row topline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text
is used
\end_layout
+\end_inset
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+SDCC_REVISION
+\begin_inset LatexCommand \index{SDCC\_REVISION}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+Always defined.
+ SDCC svn revision number
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+SDCC_PARMS_IN_BANK1
+\begin_inset LatexCommand \index{SDCC\_PARMS\_IN\_BANK1}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+when
+\emph on
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-parms-in-bank1
+\emph default
+ is used
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+SDCC_FLOAT_REENT
+\begin_inset LatexCommand \index{SDCC\_MODEL\_FLAT24}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+when
+\emph on
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-float-reent
+\emph default
+ is used
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row topline="true" bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+SDCC_INT_LONG_REENT
+\begin_inset LatexCommand \index{SDCC\_INT\_LONG\_REENT}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+when
+\emph on
+-
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-int-long-reent
+\emph default
+ is used
+\end_layout
+
\end_inset
</cell>
</row>
These are currently not used for the MCS51 port.
If you absolutely need them you can fall back to inline assembly or submit
a patch to SDCC.
+\end_layout
+
+\begin_layout Subsection
+Bankswitching
+\end_layout
+
+\begin_layout Standard
+Bankswitching
+\begin_inset LatexCommand \index{Bankswitching}
+
+\end_inset
+
+ (a.k.a.
+ code banking
+\begin_inset LatexCommand \index{code banking}
+
+\end_inset
+
+) is a technique to increase the code space above the 64k limit of the 8051.
+\end_layout
+
+\begin_layout Subsubsection
+Hardware
+\end_layout
+
+\begin_layout Standard
+\begin_inset Tabular
+<lyxtabular version="3" rows="3" columns="4">
+<features>
+<column alignment="center" valignment="top" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" rightline="true" width="0">
+<row topline="true" bottomline="true">
+<cell multicolumn="1" alignment="center" valignment="top" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+8000-FFFF
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+bank1
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+bank2
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+bank3
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row topline="true" bottomline="true">
+<cell multicolumn="1" alignment="center" valignment="top" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+0000-7FFF
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+common
+\end_layout
+
+\end_inset
+</cell>
+<cell multicolumn="1" alignment="center" valignment="top" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+
+\end_layout
+
+\end_inset
+</cell>
+<cell multicolumn="2" alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row>
+<cell multicolumn="1" alignment="center" valignment="top" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+SiLabs C8051F120 example
+\end_layout
+
+\end_inset
+</cell>
+<cell multicolumn="2" alignment="center" valignment="top" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+
+\end_layout
+
+\end_inset
+</cell>
+<cell multicolumn="2" alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+
+\end_layout
+
+\end_inset
+</cell>
+<cell multicolumn="2" alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+
+\end_layout
+
+\end_inset
+</cell>
+</row>
+</lyxtabular>
+
+\end_inset
+
+
+\newline
+
+\newline
+Usually the hardware uses some sfr (an output port or an internal sfr) to
+ select a bank and put it in the banked area of the memory map.
+ The selected bank usually becomes active immediately upon assignment to
+ this sfr and when running inside a bank it will switch out this code it
+ is currently running.
+ Therefor you cannot jump or call directly from one bank to another and
+ need to use a so-called trampoline in the common area.
+ For SDCC an example trampoline is in crtbank.asm and you may need to change
+ it to your 8051 derivative or schematic.
+ The presented code is written for the C8051F120.
+\newline
+
+\newline
+When calling a banked function
+ SDCC will put the LSB of the functions address in register R0, the MSB
+ in R1 and the bank in R2 and then call this trampoline
+\emph on
+__sdcc_banked_call
+\emph default
+.
+ The current selected bank is saved on the stack, the new bank is selected
+ and an indirect jump is made.
+ When the banked function returns it jumps to
+\emph on
+__sdcc_banked_ret
+\emph default
+ which restores the previous bank and returns to the caller.
+\end_layout
+
+\begin_layout Subsubsection
+Software
+\end_layout
+
+\begin_layout Standard
+When writing banked software using SDCC you need to use some special keywords
+ and options.
+ You also need to take over a bit of work from the linker.
+\newline
+
+\newline
+To create a function
+ that can be called from another bank it requires the keyword
+\emph on
+banked
+\emph default
+
+\begin_inset LatexCommand \index{banked}
+
+\end_inset
+
+.
+ The caller must see this in the prototype of the callee and the callee
+ needs it for a proper return.
+ Called functions within the same bank as the caller do not need the
+\emph on
+banked
+\emph default
+ keyword nor do functions in the common area.
+ Beware: SDCC does not know or check if functions are in the same bank.
+ This is your responsibility!
+\newline
+
+\newline
+Normally all functions you write end up in
+ the segment CSEG.
+ If you want a function explicitly to reside in the common area put it in
+ segment HOME.
+ This applies for instance to interrupt service routines as they should
+ not be banked.
+\end_layout
+
+\begin_layout Standard
+Functions that need to be in a switched bank must be put in a named segment.
+ The name can be mostly anything upto eight characters (e.g.
+ BANK1).
+ To do this you either use -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-codeseg BANK1 (See
+\begin_inset LatexCommand \ref{lyx:-codeseg}
+
+\end_inset
+
+) on the command line when compiling or #pragma codeseg BANK1 (See
+\begin_inset LatexCommand \ref{sec:Pragmas}
+
+\end_inset
+
+) at the top of the C source file.
+ The segment name always applies to the whole source file and generated
+ object so functions for different banks need to be defined in different
+ source files.
+\newline
+
+\newline
+When linking your objects you need to tell the linker where
+ to put your segments.
+ To do this you use the following command line option to SDCC: -Wl-b BANK1=0x180
+00 (See
+\begin_inset LatexCommand \ref{lyx:-Wl option}
+
+\end_inset
+
+).
+ This sets the virtual start address of this segment.
+ It sets the banknumber to 0x01 and maps the bank to 0x8000 and up.
+ The linker will not check for overflows, again this is your responsibility.
+\end_layout
+
+\begin_layout Standard
\begin_inset VSpace bigskip
\end_inset
\end_inset
-\newpage
-
\end_layout
\begin_layout Section
\end_layout
\begin_layout Standard
+\noindent
Currently supported devices include:
\end_layout
\end_layout
\begin_layout Standard
-16F: 627, 627a, 628, 628a, 630, 636, 639, 648a, 676, 684, 685, 687, 688,
- 689, 690
+16CR: 620a, 73, 74, 76, 77
\end_layout
\begin_layout Standard
-16F: 716, 72, 73, 737, 74, 76, 767, 77, 777, 785
+16F: 616, 627, 627a, 628, 628a, 630, 636, 639, 648, 648a, 676, 684, 685,
+ 687, 688, 689, 690
+\end_layout
+
+\begin_layout Standard
+16F: 716, 72, 73, 737, 74, 747, 76, 767, 77, 777, 785
\end_layout
\begin_layout Standard
16F: 818, 819, 84, 84a, 87, 870, 871, 872, 873, 873a, 874, 874a, 876, 876a,
- 877, 877a, 88
+ 877, 877a, 88, 886, 887
\end_layout
\begin_layout Standard
-16F: 913, 914, 916, 917
+16F: 913, 914, 916, 917, 946
\end_layout
\begin_layout Standard
+26HV: 626, 785
+\end_layout
+
+\begin_layout Standard
+\noindent
An up-to-date list of currently supported devices can be obtained via
\family typewriter
sdcc -mpic14 -phelp foo.c
\begin_layout Standard
Functions with variable argument lists (like printf) are not yet supported.
- Similarly, taking the argument of the first argument passed into a function
+ Similarly, taking the address of the first argument passed into a function
does not work: It is currently passed in WREG and has no address...
\end_layout
\end_layout
\begin_layout Standard
-18F: 2220, 2221, 2320, 2321, 2331, 2431, 2455, 24j10, 2525, 2550, 25j10,
- 2620
+18F: 2220, 2221, 2320, 2321, 2331, 2410, 2420, 2423, 2431, 2450, 2455, 2480,
+ 24j10
+\end_layout
+
+\begin_layout Standard
+18F: (2510,) 2515, 2520, 2523, 2525, 2550, 2580, 2585, 25j10, 2610, 2620,
+ 2680, 2682, 2685
+\end_layout
+
+\begin_layout Standard
+18F: 4220, 4221, 4320, 4321, 4331, 4410, 4420, 4423, 4431, 4450, 4455, 4480,
+ 44j10
+\end_layout
+
+\begin_layout Standard
+18F: 4510, 4515, 4520, 4523, 4525, 4550, 4580, 4585, 45j10, 4610, 4620,
+ 4680, 4682, 4685
+\end_layout
+
+\begin_layout Standard
+18F: 6520, 6585, 6620, 6680, 66j60, 66j65, 6720, 67j60
\end_layout
\begin_layout Standard
-18F: 4220, 4221, 4320, 4321, 4331, 4431, 4455, 44j10, 4520, 4525, 4550,
- 45j10, 4620
+18F: 8520, 8585, 8620, 8680, 86j60, 86j65, 8720, 87j60
\end_layout
\begin_layout Standard
-18F: 6520, 6620, 6680, 6720
+18F: 96j60, 96j65, 97j60
\end_layout
\begin_layout Standard
-18F: 8520, 8620, 8680, 8720
+\noindent
+An up-to-date list of supported devices is also available via '
+\family typewriter
+sdcc -mpic16 -plist
+\family default
+'.
\end_layout
\begin_layout Subsection
\end_inset
--optimize-goto Try to use (conditional) BRA instead of GOTO.
+-no-optimize-goto Do not use (conditional) BRA instead of GOTO.
\end_layout
\begin_layout Description
\end_layout
\begin_layout Standard
+\noindent
In addition the following macros are defined when calling assembler:
\end_layout
\end_layout
\begin_layout Standard
+\noindent
This feature allows for linking with specific libraries withoug having to
explicit name them in the command line.
Note that the
\begin_layout Subsection
Libraries
+\begin_inset LatexCommand \label{sub:pic16Libraries}
+
+\end_inset
+
+
\end_layout
\begin_layout Standard
\end_layout
\begin_layout Standard
+\noindent
Libraries are created with gplib which is part of the gputils package
\begin_inset LatexCommand \url{http://sourceforge.net/projects/gputils}
\begin_layout Standard
Before using SDCC/pic16 there are some libraries that need to be compiled.
- This process is not done automatically by SDCC since not all users use
- SDCC for pic16 projects.
- So each user should compile the libraries separately.
-\end_layout
-
-\begin_layout Standard
-The steps to compile the pic16 libraries under Linux and Mac OS X are:
+ This process is done automatically if gputils are found at SDCC's compile
+ time.
+ Should you require to rebuild the pic16 libraries manually, these are the
+ steps required to do so under Linux or Mac OS X (cygwin might work as well,
+ but is untested):
\end_layout
\begin_layout LyX-Code
\end_layout
\begin_layout LyX-Code
-./configure
-\end_layout
-
-\begin_layout LyX-Code
-make
+./configure.gnu
\end_layout
\begin_layout LyX-Code
su -c 'make install' # install the libraries, you need the root password
\end_layout
+\begin_layout LyX-Code
+cd ../..
+\end_layout
+
\begin_layout Standard
If you need to install the headers too, do:
\end_layout
su -c 'make install' # install the headers, you need the root password
\end_layout
-\begin_layout Standard
-There exist a special target to build the I/O libraries.
- This target is not automatically build because it will build the I/O library
- for
-\emph on
-every
-\emph default
- supported device.
- This way building will take quite a lot of time.
- Users are advised to edit the
-\series bold
-device/lib/pic16/pics.build
-\series default
- file and then execute:
-\end_layout
-
-\begin_layout LyX-Code
-make lib-io
-\end_layout
-
\begin_layout Subsection
Adding New Devices to the Port
\end_layout
\begin_layout Standard
Adding support for a new 16
\begin_inset ERT
-status open
+status collapsed
\begin_layout Standard
\begin_layout Enumerate
Add DEVICE to
\family typewriter
-/path/to/sdcc/device/lib/pics.all
+/path/to/sdcc/device/lib/pic16/pics.all
\family default
- (and
-\family typewriter
-.build
-\family default
-).
+
\newline
Note: No 18f prefix here!
\end_layout
\begin_layout Enumerate
-Adjust
+Edit
\family typewriter
-/path/to/sdcc/device/lib/pic16/libio/*.ignore
-\family default
-
+/path/to/sdcc/device/include/pic16/adc.h
\newline
-Add your DEVICE if it does not compile in
-\family typewriter
-adc
-\family default
-,
-\family typewriter
-i2c
+
\family default
-, or
+Add the new devices to the correct ADC style class (depending on the number
+ of ADC channels).
+\newline
+Do not touch
\family typewriter
-usart
+adc.h
\family default
-.
+ if the device does not offer any ADC at all.
\end_layout
\begin_layout Enumerate
\family typewriter
/path/to/sdcc/device/include/pic16/pic18fregs.h
\family default
-.
- The file format is self-explanatory, just add
+
+\newline
+The file format is self-explanatory, just add
\newline
\family typewriter
#elif defined(picDEVICE)
\newline
-# include <picDEVICE.h>
+#
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+
+\backslash
+
+\end_layout
+
+\end_inset
+
+include <picDEVICE.h>
\family default
\newline
-at the right place (keep it sorted).
+at the right place (keep the file sorted, please).
\end_layout
\begin_layout Enumerate
Edit
\family typewriter
-/path/to/sdcc/src/pic16/devices.inc
+/path/to/sdcc/device/include/pic16devices.txt
+\newline
+
+\family default
+Copy and modify an existing entry or create a new one and insert it at the
+ correct place (keep the file sorted, please).
+\end_layout
+
+\begin_layout Enumerate
+Add the device to
+\family typewriter
+/path/to/sdcc/device/lib/pic16/libdev/Makefile.am
+\family default
+
+\newline
+Copy an existing entry and adjust the device name.
+\end_layout
+
+\begin_layout Enumerate
+Add the device to
+\family typewriter
+/path/to/sdcc/device/lib/pic16/libio/Makefile.am
+\family default
+
+\newline
+Copy the record from the 18f2220 and adjust the device name.
+\newline
+If the new device
+ does not offer ADC, I
+\begin_inset Formula $^{\text{2}}$
+\end_inset
+
+C, and/or (E)USART functionality as assumed by the library, remove the lines
+ with references to
+\family typewriter
+adc/*.c
+\family default
+,
+\family typewriter
+usart/*.c
+\family default
+, or
+\family typewriter
+usart/*.c
+\family default
+, respectively.
+\end_layout
+
+\begin_layout Enumerate
+Update
+\family typewriter
+libdev/Makefile.in
+\family default
+ and
+\family typewriter
+libio/Makefile.in
+\family default
+ using
+\newline
+
+\family typewriter
+./bootstrap.sh
+\family default
+
+\newline
+in
+\family typewriter
+/path/to/sdcc/device/lib/pic16
\family default
.
- Copy and modify an existing entry and insert it at the correct place (keep
- the file sorted).
- The file is hardly documented, look at the entries for the 18f2221...
\end_layout
\begin_layout Enumerate
-Recompile SDCC, including the pic16 libraries.
+Recompile the pic16 libraries as described in
+\begin_inset LatexCommand \ref{sub:pic16Libraries}
+
+\end_inset
+
+.
\end_layout
\begin_layout Subsection
\end_layout
\begin_layout Standard
+\noindent
\noun on
Large
\end_layout
\begin_layout Standard
+\noindent
Generic pointer are read and written with a set of library functions which
read/write 1, 2, 3, 4 bytes.
\end_layout
\end_layout
\begin_layout Standard
+\noindent
\align center
\begin_inset Tabular
<lyxtabular version="3" rows="2" columns="7">
\end_layout
\begin_layout Standard
+\noindent
Currently implemented there are 3 types of streams defined:
\end_layout
\begin_layout Standard
+\noindent
\align center
\begin_inset Tabular
<lyxtabular version="3" rows="4" columns="4">
\end_layout
\begin_layout Standard
+\noindent
The stream identifiers are declared as macros in the stdio.h header.
\end_layout
\begin_layout Standard
+\noindent
In the libc library there exist the functions that are used to write to
each of the above streams.
These are
\end_layout
\begin_layout Standard
+\noindent
The prototypes for these names are defined in the header file
\emph on
signal.h
\end_layout
\begin_layout Standard
+\noindent
In order to simplify signal handling, a number of macros is provided:
\end_layout
Known Bugs
\end_layout
+\begin_layout Subsubsection
+Extended Instruction Set
+\end_layout
+
+\begin_layout Standard
+The PIC16 port emits code which is incompatible with the extended instruction
+ set available with many newer devices.
+ Make sure to always explicitly disable it, usually using
+\end_layout
+
+\begin_layout Standard
+
+\family typewriter
+static __code char __at(__CONFIG4L) conf4l = /* more flags & */ _XINST_OFF_4L;
+\end_layout
+
\begin_layout Standard
-The PIC16 Port currently does not pass SDCC's regression test
+\noindent
+Some devices (namely 18f2455, 18f2550, 18f4455, and 18f4550) use _ENHCPU_OFF_4L
+ instead of _XINST_OFF_4L.
+\end_layout
+
+\begin_layout Subsubsection
+Regression Tests
+\end_layout
+
+\begin_layout Standard
+The PIC16 port currently passes most but not all of the tests in SDCC's
+ regression test
\begin_inset LatexCommand \index{Regression test (PIC16)}
\end_inset
\end_inset
-) and thus the snapshot build regression tests for the PIC16 target are
- currently disabled for all hosts
-\emph on
-.
+), thus no automatic regression tests are currently performed for the PIC16
+ target.
\end_layout
\begin_layout Chapter
\begin_layout Standard
\align left
\begin_inset Tabular
-<lyxtabular version="3" rows="14" columns="3">
+<lyxtabular version="3" rows="16" columns="3">
<features>
<column alignment="left" valignment="top" leftline="true" width="0pt">
<column alignment="block" valignment="top" leftline="true" width="30line%">
-<column alignment="left" valignment="top" leftline="true" rightline="true" width="0pt">
+<column alignment="left" valignment="top" leftline="true" rightline="true" width="40col%">
<row topline="true" bottomline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text
\end_inset
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+d52
+\begin_inset LatexCommand \index{d52}
+
+\end_inset
+
+
+\begin_inset LatexCommand \index{d52 (disassembler)}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+Disassembler, can count instruction cycles
+\begin_inset LatexCommand \index{instruction cycles (count)}
+
+\end_inset
+
+, use with options -pnd
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+\begin_inset LatexCommand \url{http://www.8052.com/users/disasm/}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+</row>
+<row bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+cmake
+\begin_inset LatexCommand \index{cmake}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+Cross platform build system, generates Makefiles
+\begin_inset LatexCommand \index{Makefile}
+
+\end_inset
+
+ and project workspaces
+\begin_inset LatexCommand \index{project workspace}
+
+\end_inset
+
+
+\end_layout
+
+\end_inset
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\begin_layout Standard
+\begin_inset LatexCommand \url{http://www.cmake.org}
+
+\end_inset
+
+ \InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+and a dedicated wiki entry:
+\begin_inset LatexCommand \url{http://www.cmake.org/Wiki/CmakeSdcc}
+
+\end_inset
+
+
\end_layout
\end_inset
\end_inset
check that SDCC itself compiles flawlessly on several host platforms (i386,
- Opteron, 64 bit Alpha, ppc64, Mac OS X on PPC, Solaris on Sparc) and checks
- the quality of the code generated by SDCC by running the code for several
- target platforms through simulators.
+ Opteron, 64 bit Alpha, ppc64, Mac OS X on ppc and i386, Solaris on Sparc)
+ and checks the quality of the code generated by SDCC by running the code
+ for several target platforms through simulators.
The regression test suite comprises more than 100 files which expand to
more than 500 test cases which include more than 4500 tests.
The results of these tests are published daily on SDCC's snapshot page
\end_inset
- or -
+
+\series default
+or
+\series bold
+ -
\begin_inset ERT
status collapsed
'__data' instead of 'data'.
\end_layout
+\begin_layout Itemize
+Integer promotion of variable arguments is not performed if the argument
+ is explicitly taypecasted unless the
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c89
+\begin_inset LatexCommand \index{-\/-std-c89}
+
+\end_inset
+
+
+\series default
+or
+\series bold
+ -
+\begin_inset ERT
+status collapsed
+
+\begin_layout Standard
+
+
+\backslash
+/
+\end_layout
+
+\end_inset
+
+-std-c99
+\begin_inset LatexCommand \index{-\/-std-c99}
+
+\end_inset
+
+
+\series default
+ command line options are used.
+\end_layout
+
+\begin_deeper
+\begin_layout Verse
+
+\family typewriter
+void vararg_func (char *str, ...) { str; }
+\newline
+
+\newline
+void main (void)
+\newline
+{
+\newline
+\InsetSpace ~
+\InsetSpace ~
+char c = 10;
+\newline
+
+\newline
+\InsetSpace ~
+\InsetSpace ~
+/* argument
+ u is promoted to int before
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+* passing to function */
+\newline
+\InsetSpace ~
+\InsetSpace ~
+vararg_func ("%c", c);
+\newline
+
+\newline
+\InsetSpace ~
+\InsetSpace ~
+/*
+ argument u is not promoted to int,
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+* it is passed as char to function
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+* if
+ --std-cXX is not defined;
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+* is promoted to int before passing
+\newline
+\InsetSpace ~
+\InsetSpace ~
+\InsetSpace ~
+* to function
+ if --std-cXX is defined */
+\newline
+\InsetSpace ~
+\InsetSpace ~
+vararg_func ("%bc", (char)u);
+\newline
+}
+\end_layout
+
+\end_deeper
\begin_layout Section
Cyclomatic Complexity
\begin_inset LatexCommand \index{Cyclomatic complexity}
\end_layout
\begin_layout Standard
-\begin_inset LatexCommand \url{http://sdcc.sourceforge.net#Who}
+\begin_inset LatexCommand \url{http://sdcc.sourceforge.net/#Who}
\end_inset
projects / fw / sdcc / blobdiff