Can anyone explain the concatenation on #define like that:

Asked Apr 07 '19 at 20:12

Active Apr 07 '19 at 20:15

Viewed 40 times

#define CONC_BIT(b7,b6,b5,b4,b3,b2,b1,b0) Conc_help(b7,b6,b5,b4,b3,b2,b1,b0)
#define Conc_help(b7,b6,b5,b4,b3,b2,b1,b0) 0b##b7##b6##b5##b4##b3##b2##b1##b0

The goal of this code "in embedded system" to concatenate all 8 pins in one called port in "Digital Input Output"

edited Apr 07 '19 at 20:15

asked Apr 07 '19 at 20:12

Ahmed Boon

2

lookup token pasting – Jean-François Fabre Apr 07 '19 at 20:15
I have a proper answer that's better than the suggested dupe... But I didn't finish typing it before the question was closed ‍♂️ – Gregory Pakosz Apr 07 '19 at 20:22
I still did not understand from the duplicated answer ... What's the benefit of adding a "Conc_help" why not add ( 0b##b7##b6##b5##b4##b3##b2##b1##b0) along – Ahmed Boon Apr 07 '19 at 20:40

Can anyone explain the concatenation on #define like that:

0 Answers0