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int syntax

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Bilal

Joined: 24 Apr 2010
Posts: 75
Location: Islamabad

int syntax

Posted: Sat Jan 21, 2012 4:29 am

hi.
This is a part of the lcd.c file.

Code:

struct lcd_pin_map { // This structure is overlayed
BOOLEAN enable; // on to an I/O port to gain
BOOLEAN rs; // access to the LCD pins.
BOOLEAN rw; // The bits are allocated from
BOOLEAN unused; // low order up. ENABLE will
int data : 4; // be pin B0.
} lcd;

I was expecting a syntax error in command but its not.

Code:

int data : 4;

Kindly anyone explain me what this statement do.
Thanks
_________________
...

andrewg

Joined: 17 Aug 2005
Posts: 316
Location: Perth, Western Australia


Posted: Sat Jan 21, 2012 7:23 am

Google "struct bit field"... _________________ Andrew

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