This is a comparison of currently (early 2018) available C implementations targeting the STM8. The author is a SDCC user and developer, but tried to do an objective comparison here.
Free C Compiler for all STM8, from Cosmic. ST Visual Programmer STM8. STM8 Flash loader demonstrator (UM0462) STVD-STM8. ST Visual develop IDE for developing ST7 and STM8 applications. STVP programming toolkit: C++ source files for creating PC programming interface.
This page might get updated as new information becomes available (i.e. In case there are changes between SDCC 3.7.0 RC1 and the final 3.7.0 release or when obtaining a current Raisonance evaluation license). There is also a similar, and a. The Compilers There are currently multiple C implementations targeting the STM8: • Cosmic: The comparison uses the STM8 Free Special Edition 4.4.7, the current version as of end of January 2018. • SDCC: SDCC 3.7.0 from the end of February 2018.
• Raisonance: RCSTM8 COMPILER 2.62.17.263, which is the current version as of end of February 2016. • IAR: The comparison uses the time-limited IAR 3.10.1.201 Embedded Workbench for STMicroelectronics STM8, which is the current version as of end of January 2018. There are two more: 'ST8CC' and 'SDCC for ST7, STM8'. Neither has been included in the comparison.
'ST8CC' seems rather incomplete and does not run under current operating systems. 'SDCC for ST7, STM8' is an unmaintained fork of an old SDCC version. Standard Compliance The input language to be accepted by C compilers is defined by international standards, with the ANSI C89/ISO C90, ISO C99 and ISO C11 being the most important. • C89: C was first standardized by ANSI in 1989, which (with minor fixes) became an ISO standard in 1990. This standard is usually referred to as ANSI C89 or ISO C90. • C95: In 1995, some minor new features were introduced, resulting in what is commonly called the ISO C95 standard.
It never became popular, with most users moving directly from C89/C90 to C99. • C99: The 1999 ISO standard introduced major new features.
The move from C89 to C99 was initially slow, with the ISO C99 standard slowly gaining ground over the years. • C11: The latest standard is the 2011 ISO standard. Compilers vendors and C programmers moved to ISO C11 rather quickly.
• EC++:Embedded C++ was an attempt to standardize a subset of C++ suitable for embedded devices, which never became really popular: 'To the best of my knowledge EC++ is dead (2004), and if it isn't it ought to be.' (Bjarne Stroustrup). No current compiler targeting the STM8 fully supports any of the standards. However all of the compilers at least support large subsets of some standards. They also offer some extensions to the standard, e.g.
SDCC and IAR implement these extensions in a standard-conforming way (using identifiers prefixed by two underscores). In general, SDCC and IAR are ahead of the competition in standard-compliance. Raisonance only supports a few select keywords standards beyond C90. Cosmic has a somewhat incomplete C99 mode (compiler option -pc99, not directly exposed in the IDE). All compilers offer a decent C90 mode.
While the C99 mode of IAR is more complete than the SDCC and Cosmic ones, SDCC is the only compiler with a C11 mode. C89 C95 C99 C11 EC++ Cosmic Yes No Yes No No SDCC Yes Yes Yes Yes No Raisonance Yes No No No No IAR Yes No Yes No Yes This is also reflected in the data types supported by the compilers.
Even though all the standards require the data types double and long double, none of the compilers support it. Some compilers instead offer non-standard versions of these types with reduced precision (essentially using float in place of double and long double). Yamaha s950 for sale. Cosmic and Raisonance both offer a non-standard boolean data type, where pointers and arrays are not allowed.
For Raisonance, boolean variables have to be global. In Raisonance, the size of bit-fields is limited to 8 bits (the lowest limit allowed by the standards is 16 bits). Bool char short int long long long float double long double Cosmic No Yes Yes Yes Yes No Yes No No SDCC Yes Yes Yes Yes Yes Yes Yes No No Raisonance No Yes Yes Yes Yes No Yes No No IAR Yes Yes Yes Yes Yes Yes Yes No No Code Quality Three important aspects of code quality are correctness, size and performance. The latter two can be assessed using benchmarks. Three classic benchmarks suitable for small devices were used: • Whetstone: A benchmark containing both integer and floating point operations. However, especially for devices without hardware floating-point support, such as the STM8, the floating-point parts, especially C library functions, dominate the benchmark.
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This is a comparison of currently (early 2018) available C implementations targeting the STM8. The author is a SDCC user and developer, but tried to do an objective comparison here.
Free C Compiler for all STM8, from Cosmic. ST Visual Programmer STM8. STM8 Flash loader demonstrator (UM0462) STVD-STM8. ST Visual develop IDE for developing ST7 and STM8 applications. STVP programming toolkit: C++ source files for creating PC programming interface.
This page might get updated as new information becomes available (i.e. In case there are changes between SDCC 3.7.0 RC1 and the final 3.7.0 release or when obtaining a current Raisonance evaluation license). There is also a similar, and a. The Compilers There are currently multiple C implementations targeting the STM8: • Cosmic: The comparison uses the STM8 Free Special Edition 4.4.7, the current version as of end of January 2018. • SDCC: SDCC 3.7.0 from the end of February 2018.
• Raisonance: RCSTM8 COMPILER 2.62.17.263, which is the current version as of end of February 2016. • IAR: The comparison uses the time-limited IAR 3.10.1.201 Embedded Workbench for STMicroelectronics STM8, which is the current version as of end of January 2018. There are two more: 'ST8CC' and 'SDCC for ST7, STM8'. Neither has been included in the comparison.
'ST8CC' seems rather incomplete and does not run under current operating systems. 'SDCC for ST7, STM8' is an unmaintained fork of an old SDCC version. Standard Compliance The input language to be accepted by C compilers is defined by international standards, with the ANSI C89/ISO C90, ISO C99 and ISO C11 being the most important. • C89: C was first standardized by ANSI in 1989, which (with minor fixes) became an ISO standard in 1990. This standard is usually referred to as ANSI C89 or ISO C90. • C95: In 1995, some minor new features were introduced, resulting in what is commonly called the ISO C95 standard.
It never became popular, with most users moving directly from C89/C90 to C99. • C99: The 1999 ISO standard introduced major new features.
The move from C89 to C99 was initially slow, with the ISO C99 standard slowly gaining ground over the years. • C11: The latest standard is the 2011 ISO standard. Compilers vendors and C programmers moved to ISO C11 rather quickly.
• EC++:Embedded C++ was an attempt to standardize a subset of C++ suitable for embedded devices, which never became really popular: 'To the best of my knowledge EC++ is dead (2004), and if it isn't it ought to be.' (Bjarne Stroustrup). No current compiler targeting the STM8 fully supports any of the standards. However all of the compilers at least support large subsets of some standards. They also offer some extensions to the standard, e.g.
SDCC and IAR implement these extensions in a standard-conforming way (using identifiers prefixed by two underscores). In general, SDCC and IAR are ahead of the competition in standard-compliance. Raisonance only supports a few select keywords standards beyond C90. Cosmic has a somewhat incomplete C99 mode (compiler option -pc99, not directly exposed in the IDE). All compilers offer a decent C90 mode.
While the C99 mode of IAR is more complete than the SDCC and Cosmic ones, SDCC is the only compiler with a C11 mode. C89 C95 C99 C11 EC++ Cosmic Yes No Yes No No SDCC Yes Yes Yes Yes No Raisonance Yes No No No No IAR Yes No Yes No Yes This is also reflected in the data types supported by the compilers.
Even though all the standards require the data types double and long double, none of the compilers support it. Some compilers instead offer non-standard versions of these types with reduced precision (essentially using float in place of double and long double). Yamaha s950 for sale. Cosmic and Raisonance both offer a non-standard boolean data type, where pointers and arrays are not allowed.
For Raisonance, boolean variables have to be global. In Raisonance, the size of bit-fields is limited to 8 bits (the lowest limit allowed by the standards is 16 bits). Bool char short int long long long float double long double Cosmic No Yes Yes Yes Yes No Yes No No SDCC Yes Yes Yes Yes Yes Yes Yes No No Raisonance No Yes Yes Yes Yes No Yes No No IAR Yes Yes Yes Yes Yes Yes Yes No No Code Quality Three important aspects of code quality are correctness, size and performance. The latter two can be assessed using benchmarks. Three classic benchmarks suitable for small devices were used: • Whetstone: A benchmark containing both integer and floating point operations. However, especially for devices without hardware floating-point support, such as the STM8, the floating-point parts, especially C library functions, dominate the benchmark.