Data Types

Standard Data Types

Note: The pre-defined variable types that come with the PSoC programming suites are defined both with and without the _t suffix that most people use to define a typedef (e.g. uint8_t). I recommend using the version with the underscore, as this increases portability (this is also supported by Linux and other Unix-like systems). It is better practise to use the data types whose size is explicitly stated (e.g. uint32_t rather than unsigned int as the latter’s size is platform-dependant). The following data types are valid for all PSoC families.

Standard C Variable Type Sizes On PSoC 5

Data Type Size (bytes) Range Decimal Precision (places) printf() identifier
char 1 0-255   %c
short 2     %i
int 4     %i
unsigned int 4     %u
long 4     %i
float 4   7 %f
double 8   15 %f

These were discovered using the sizeof() command, and printing the result to a debug terminal.

Posted: July 26th, 2013 at 12:57 pm
Last Updated on: October 21st, 2015 at 10:15 am