8/3/2019 Limitations of Simulator Keil
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Limitations
Keil development development tools without a current product
license run as a
Lite/Evaluation edition and have the following restrictions:
MDK-ARM Lite Edition Programs that generate more than 32 Kbytes
of code and data will not
compile, assemble, or link.
The debugger supports programs that are 32 Kbytes or
smaller.
The compiler does not generate a disassembly listing of the
machine codegenerated. The -S, --asm, and --interleave compiler
command-line options are
disabled.
The compiler and assembler do not generate position-independent
code ordata. The --apcs /ropi /rwpi /pic/ pid compiler and
assembler command line
options are disabled.
The assembler and linker create Symbolic Output Format objects
which
cannot be linked with third-party linker utilities. Fully
licensed tools generate
standard ELF/DWARF files which may be used with third-party
utilities.
The linker does not accept scatter-loading description files for
sophisticatedmemory layouts. The --scatter command line option is
disabled.
The base address for the code and constants in memory must
be
0x000080000, 0x000100000, 0x000200000, 0x000300000,
0x000400000,
0x010400000, 0xXX000000, or 0xXX800000 (where XX is a
Hexadecimalnumber from 00-FF). When the base address is 0x0 the
linker places the code at
the start of on-chip Flash of most ARM processor-based
microcontrollers.
C51 Evaluation Tools
The 8051 compiler, assembler, linker, and debugger are limited
to 2 Kbytes ofobject code. Source code may be of any size.
Programs that generate more than 2 Kbytes of object code will
not compile,
assemble, or link. The debugger supports programs that are 2
Kbytes or smaller.
The startup code generated includes LJMPs. Code generated cannot
be usedin single-chip devices that support 2 Kbytes or less of
program space.
Programs start at offset 0x0800. Programs generated with the
evaluation
software may not be programmed into single-chip devices with
less than 2Kbytes of on-chip ROM.
No hardware support for multiple DPTR registers is provided.
No support for floating-point arithmetic and no support for user
libraries is
provided.
No support for in-line assembly using #pragma ASM.
The following components which are present in the PK51 Full
Version are not
included in the Evaluation Version: Linker for Code Banking,
Library Manager,and RTX51 Tiny Real-time Operating System.
C251 Evaluation Tools
The 251 compiler, assembler, linker, and debugger are limited to
2 Kbytes of
object code. Source code may be of any size.
Programs that generate more than 2 Kbytes of object code will
not compile,
assemble, or link.
The debugger supports programs that are 2 Kbytes or smaller.
