GY-63_MS5611/libraries/integer24

integer24

Arduino library for the integer24 data types uint24_t and int24_t.

Description

The integer24 is an experimental library to implement support for the following two 24 bit data types:

• int24_t
• uint24_t

Version 0.1.0 implements a typedef for both types.

Note: AVR does support __uint24 and __int24 which uses only 3 bytes. This allows an UNO to have ~30% more elements (in theory).

This library is only (limited) tested with AVR - UNO.
So use with care.

Range

platform	type	minimum	maximum	notes
AVR	uint24_t	0	16777215	__uint24
AVR	int24_t	-8388608	8388607	__int24
other	uint24_t	0	4294967296	uint32_t for now
other	int24_t	-2147483648	2147483648	int32_t for now

Note the range for other platforms may change in the future to those matching AVR.

If other platforms are known to implement (3byte) int24 data types please let me know so I can add these.

Known limitations

• The AVR uint24_t and int24_t cannot be printed without casting.
  • see integer24_explore_printing.ino
• Arduino-CI does not implement __int24 __uint24 so no tests can be done.

Future

Must

• get hands on experience, especially AVR
• document what is learned.

Should

• implement char * convert24(int24_t) and char * convert24(uint24_t)
  • length = 8 + \0 = 9
  • fprintf(buf, "%d", (uint32_t)val); ?
  • char * itoa ( int value, char * str, int base );
  • see integer24_explore_printing.ino

Could

• implement a class for both types
  • implement printTo()
  • basic math, comparison, negation, ...

Won't