May I generally agree w/poster Danny's guidance - but w/the addition (surely the NEEDED addition ) of (both) a, " FULL & PARTIAL PORT: WRITE, CLEAR & READ!" Individual bit control IS required - but so too - Partial & Full Port Control ... The ability to "extend such capability" to (other) platforms (really devices) may not have sensed the fact that (other) ARM MCUs have long accommodated, "16-bit WIDE GPIO Ports" - demanding another "hoop" for jumping...
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