file lcd.h

bumbum1291

Trứng gà
cho mình hỏi trong file lcd.h có đoạn code như thế này:
typedef union _BYTE_VAL
{
unsigned char Val;
struct
{
unsigned char b0:1;
unsigned char b1:1;
unsigned char b2:1;
unsigned char b3:1;
unsigned char b4:1;
unsigned char b5:1;
unsigned char b6:1;
unsigned char b7:1;
} bits;
} BYTE_VAL;
nó có nghĩa gì vậy
 
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