\size normal
-SDCC 2.6.0
+SDCC 2.6.1
\size footnotesize
\newline
, etc.), Dallas DS80C390 variants, Freescale (formerly Motorola) HC08 and
Zilog Z80 based MCUs.
- It can be retargetted for other microprocessors, support for Microchip
- PIC, Atmel AVR is under development.
+ It can be retargeted for other microprocessors, support for Microchip PIC,
+ Atmel AVR is under development.
The entire source code for the compiler is distributed under GPL.
SDCC uses ASXXXX
\begin_inset LatexCommand \index{asXXXX (as-gbz80, as-hc08, asx8051, as-z80)}
\end_inset
-, an open source retargettable assembler & linker.
+, an open source retargetable assembler & linker.
SDCC has extensive language extensions suitable for utilizing various microcont
rollers and underlying hardware effectively.
\end_inset
.
- More detailled instructions follow below.
+ More detailed instructions follow below.
\layout Section
Configure Options
not
\emph default
support long variables and field widths).
+\layout Subsubsection
+
+<malloc.h>
+\begin_inset LatexCommand \index{malloc.h}
+
+\end_inset
+
+
+\layout Standard
+
+Before using dynamic
+\begin_inset LatexCommand \index{dynamic}
+
+\end_inset
+
+ memory allocation with SDCC, you have to provide heap
+\begin_inset LatexCommand \index{heap}
+
+\end_inset
+
+ space for malloc to allocate memory from
+\family typewriter
+.
+
+\family default
+You can acomplish this by including the following code into your source:
+\layout Verse
+
+
+\family typewriter
+#include <malloc.h>
+\begin_inset LatexCommand \index{malloc.h}
+
+\end_inset
+
+ /* calloc
+\begin_inset LatexCommand \index{calloc}
+
+\end_inset
+
+, malloc
+\begin_inset LatexCommand \index{malloc}
+
+\end_inset
+
+, realloc
+\begin_inset LatexCommand \index{realloc}
+
+\end_inset
+
+, and free
+\begin_inset LatexCommand \index{free}
+
+\end_inset
+
+ */
+\newline
+
+\newline
+#define HEAPSIZE 0x1000 /* Adjust depending on available memory */
+\newline
+unsigned char xdata myheap[HEAPSIZE]; /* The actual heap for dynamic memory
+ */
+\newline
+
+\newline
+void main (void)
+\newline
+{
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+/* Your variable declarations come here*/
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+...
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+init_dynamic_memory((MEMHEADER xdata *)myheap, HEAPSIZE);
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+...
+ /* Rest of your code*/
+\newline
+}
+\newline
+
\layout Subsection
Math functions (sinf, powf, sqrtf etc.)
(+ | -) - switch _asm _endasm block preprocessing on / off.
Default is on.
+ You use this prama to define multilines of assembly code.
+ This will prevent the preprocessor from changing the formating required
+ by assembly code.
+ Below is an example on how to use this pragma.
+\layout Verse
+
+
+\family typewriter
+#pragma preproc_asm -
+\begin_inset LatexCommand \index{\#pragma preproc\_asm}
+
+\end_inset
+
+
+\newline
+#define MYDELAY _asm
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+nop ;my assembly comment...
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+nop
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+nop
+\newline
+_endasm
+\newline
+#pragma preproc_asm +
+\newline
+
+\newline
+void foo (void)
+\newline
+{
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+ ...
+
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+ MYDELAY;
+\newline
+\SpecialChar ~
+\SpecialChar ~
+\SpecialChar ~
+ ...
+
+\newline
+}
+\newline
+
\layout Standard
The pragma's are intended to be used to turn-on or off certain optimizations
The compiler will generate a warning message when extra space is allocated.
It is strongly recommended that the save and restore pragma's be used when
changing options for a function.
+\newline
+
+\newline
+
+\newline
+
\layout Section
Defines Created by the Compiler
\begin_inset Tabular
<lyxtabular version="3" rows="11" columns="2">
<features>
-<column alignment="left" valignment="top" leftline="true" width="0">
-<column alignment="left" valignment="top" leftline="true" rightline="true" width="0">
+<column alignment="left" valignment="top" leftline="true" width="3in">
+<column alignment="left" valignment="top" leftline="true" rightline="true" width="3in">
<row topline="true" bottomline="true">
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
\begin_inset Text
\end_inset
-, etc
+, etc.
\end_inset
</cell>
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
\layout Standard
-depending on the model used (e.g.: -mds390
+depending on the model used (e.g.: -mds390)
\end_inset
</cell>
</row>
\layout Standard
-descrption
+description
\end_inset
</cell>
</row>
{
\layout LyX-Code
- stdout = STREAM_USER; /* this is not necessery, since stdout points
+ stdout = STREAM_USER; /* this is not necessary, since stdout points
\layout LyX-Code
* by default to STREAM_USER */