pack_bits()

Set bits to 1 at specified positions

Sets bits to 1 at the specified positions.

constexpr uint32_t pack_bits(...)

Parameters are specified as variadic arguments, each indicating a bit position (integer from 0 to 31). For example, pack_bits(1,3,6) returns ((1UL<<1)|(1UL<<3)|(1UL<<6)).

constexpr enables compile-time evaluation when possible using constant expressions.

Background

This function simplifies the notation in situations where values are referenced or set in various bitmaps such as IO port (DI, DO) states.