Re: [avr-gcc-list] 32-bits time

[David Kelly]

On Thu, Oct 13, 2005 at 09:10:17AM +0200, Bjarne Laursen wrote:

> A few additions to David Kelly's code:
>
> inline uint32_t timer32_now(void)
> {
>    int8_t sreg;
>    union {
>        struct {
>            uint16_t lo, hi;
>        } w;
>        uint32_t l;
>       uint8_t b[4]; // <------ added: access as bytes
>    } temp;

Below is the way I usually do the above. Didn't have it under my mouse
last night:

typedef union {

    uint32_t u32;

    int32_t i32;

    struct {
        uint16_t lo, hi;
     } u16;

    struct {
        uint8_t lo;
        uint16_t mid;
        uint8_t hi;
     } hml;

    struct {
        uint8_t lo, b, c, hi;
    } u8;

    struct {
        int8_t lo, b, c, hi;
    } i8;

} union32_t;

Easy enough to hack into whatever shape desired. The idea is to use
named members of a union rather than type casting and shifting.

--
David Kelly N4HHE, address@hidden
========================================================================
Whom computers would destroy, they must first drive mad.