xf_sys_time.c

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/* ==================== [Includes] ========================================== */
 
#include "xf_sys_time.h"
 
/* ==================== [Defines] =========================================== */
 
/* ==================== [Typedefs] ========================================== */
 
/* ==================== [Static Prototypes] ================================= */
 
/* ==================== [Static Variables] ================================== */
 
static xf_us_t (*s_get_us)(void) = NULL;
 
/* ==================== [Macros] ============================================ */
 
/* ==================== [Global Functions] ================================== */
 
xf_err_t xf_sys_time_init(xf_us_t (*get_us)(void))
{
    if (unlikely(get_us == NULL)) {
        return XF_ERR_INVALID_ARG;
    }
    s_get_us = get_us;
 
    return XF_OK;
}
 
xf_err_t xf_delay_ms(xf_ms_t n_ms)
{
    if (unlikely(s_get_us == NULL)) {
        return XF_ERR_INVALID_PORT;
    }
    if (unlikely(n_ms == 0)) {
        return XF_ERR_INVALID_ARG;
    }
 
    xf_us_t timeout_us = s_get_us();
 
    timeout_us += n_ms * 1000;
    while (timeout_us > s_get_us());
 
    return XF_OK;
}
 
xf_err_t xf_delay_us(xf_us_t n_us)
{
    if (unlikely(s_get_us == NULL)) {
        return XF_ERR_INVALID_PORT;
    }
    if (unlikely(n_us == 0)) {
        return XF_ERR_INVALID_ARG;
    }
 
    xf_us_t timeout_us = s_get_us();
 
    timeout_us += n_us;
    while (timeout_us > s_get_us());
 
    return XF_OK;
}
 
xf_err_t xf_delay_until(xf_us_t n_us)
{
    if (unlikely(s_get_us == NULL)) {
        return XF_ERR_INVALID_PORT;
    }
    if (unlikely(n_us <= s_get_us())) {
        return XF_ERR_INVALID_ARG;
    }
 
    while (n_us > s_get_us());
 
    return XF_OK;
}
 
xf_s_t xf_sys_time_get_s(void)
{
    if (unlikely(s_get_us == NULL)) {
        return 0;
    }
    return s_get_us() / 1000 / 1000;
}
 
xf_ms_t xf_sys_time_get_ms(void)
{
    if (unlikely(s_get_us == NULL)) {
        return 0;
    }
    return s_get_us() / 1000;
}
 
xf_us_t xf_sys_time_get_us(void)
{
    if (unlikely(s_get_us == NULL)) {
        return 0;
    }
    return s_get_us();
}
 
/* ==================== [Static Functions] ================================== */