The byte length of the data type of stm32
s8 occupies 1 byte, data range -2^7 to (2^7-1)
s16 occupies 2 bytes, data range -2^15 to (2^15-1)
s32 occupies 4 bytes, data range -2 ^31 to (231-1)231 = 2147483647
int64_t occupies 8 bytes, data range -2^63 to (2^63-1) 2^63 = 9223372036854775807ll
2. Unsigned integer
u8 occupies 1 byte, data range 0 - 2^8
u16 occupies 2 bytes, data range 0 - 2^16
u32 occupies 4 bytes, data range 0 - 2^32 2^32 = 4294967295
uint64_t occupies 8 bytes, data range 0 - 2^64 2 ^64 = 18446744073709551615
3. Floating point type
float —— 4 bytes, signed type, which can express negative numbers/decimal numbers; Float type must be able to accurately represent at least 6 digits after the decimal point.
double——8 bytes, 64bit, signed type, which can express negative numbers/decimal numbers; the Double type must be accurate to at least 10 decimal places.
Variable type renamed with typedef
