Lifetime Technical Support:186 3636 9649
Author Introduction: Fan Shengmin (186 3636 9649), Member of the Science Writers Association of Yuncheng City, Member of the Science Writers Association of Shanxi Province. Author of maker education. Published “Playing with Electronics” in 2016、“Super Fun Electronics Production” in 2017、”Electrical Experiments in Life” in 2018,“Arduino Programming and Hardware Implementation” in 2019, “Introduction to Electronic Production” in 2021,“From Beginner to Pro in Network Operations” in 2022,and “Arduino Programming and Hardware Setup” in 2023.
Here is a brief summary of the main differences in C language data types between STM32 and C51:
STM32 (32-bit microcontroller based on ARM Cortex-M core):
- Supports standard C language data types such as
<span>int</span>(typically 32 bits),<span>long</span>,<span>float</span>,<span>double</span>, etc. - Specific types like
<span>uint16_t</span>and<span>uint32_t</span>are used to explicitly specify unsigned short and 32-bit unsigned integers. - The exact bit size and range of data types may vary depending on the compiler and specific STM32 model.
C51 (8051 series microcontroller):
- Supports standard C language data types, but the lengths of
<span>int</span>,<span>short</span>, and<span>long</span>differ from STM32, where<span>int</span>and<span>short</span>are typically 16 bits (2 bytes), and<span>long</span>is 32 bits (4 bytes). - Provides support for 8051-specific data types such as bit scalars and special function registers (sfr).
<span>float</span>and<span>double</span>types in C51 may have different implementations or limitations compared to standard C, especially in some compiler versions where<span>double</span>may be the same as<span>float</span>.
In summary, the main differences in C language data types between STM32 and C51 lie in the bit size, range, and hardware-specific extended data types.
