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Keil使用指引Keil使用指引
Limitations of Lite/Evaluation edition of develop kits
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 code generated. The -S, --asm, and --interleave compiler command-line options are disabled. Projects will not compile with Target - Listing - C Compiler Listing enabled.
The compiler and assembler do not generate position-independent code or data. 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 sophisticated memory layouts. The --scatter command line option is disabled.
C51 Evaluation Tools
The 8051 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.
The startup code generated includes LJMPs. Code generated cannot be used in 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 2 Kbytes 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.
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