| ??? 07/27/11 20:47 Read: times Msg Score: -1 -1 Answer is Wrong |
#183089 - Bit Fields Responding to: ???'s previous message |
Hi
One way to do it is usning C bit field construct.
# define CLEAR (0)
# define SET (1)
typedef struct
{
unsigned int bit1: 1;
unsigned int bit2: 1;
unsigned int bit3: 1;
........
} Bits;
Bits BitFields;
BitFields.bit1 = SET;
BitFields.bit1 = CLEAR;
but the implementation of the construct is platform dependent. Further even a single bit will take atleast one word and if you have enough fields they are packed in the word until all bits are exausted then second word and so on. If compiler is smart enough and bit manipulation instructions are supported this is pretty fast,readable and portable code. |
| Topic | Author | Date |
| Bit variable in KEIL Arm | 01/01/70 00:00 | |
| Hw bit variables normally not available in processors | 01/01/70 00:00 | |
| Not quite true. | 01/01/70 00:00 | |
| He covered that | 01/01/70 00:00 | |
| Choice of forum | 01/01/70 00:00 | |
| bool | 01/01/70 00:00 | |
| bool is nothing specifically to do with single-bit variables | 01/01/70 00:00 | |
| Not wrong | 01/01/70 00:00 | |
| Yes - wrong! | 01/01/70 00:00 | |
| bit != bool even if nominal storage range is same | 01/01/70 00:00 | |
| Bit Fields | 01/01/70 00:00 | |
Wrong answer for this question | 01/01/70 00:00 |