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Merge pull request #21553 from aabadie/ztimer_500k

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sys/ztimer: add support for timers running at a 500kHz frequency
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Alexandre Abadie 2025-06-19 08:47:46 +00:00 committed by GitHub
commit 4db7d0166d
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1 changed files with 13 additions and 0 deletions
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13
sys/ztimer/init.c
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@ -64,6 +64,7 @@
#define WIDTH_TO_MAXVAL(width) (UINT32_MAX >> (32 - width))
#define FREQ_1MHZ 1000000LU
#define FREQ_500KHZ 500000LU
#define FREQ_250KHZ 250000LU
#define FREQ_1KHZ 1000LU
#define FREQ_1HZ 1LU
@ -219,6 +220,9 @@ ztimer_clock_t *const ZTIMER_USEC = &ZTIMER_TIMER_CLK;
# elif (ZTIMER_TIMER_FREQ == 250000LU) && !(CONFIG_ZTIMER_PERIPH_TIMER_FORCE_CONVERSION)
static ztimer_convert_shift_t _ztimer_convert_shift_usec;
ztimer_clock_t *const ZTIMER_USEC = &_ztimer_convert_shift_usec.super.super;
# elif (ZTIMER_TIMER_FREQ == 500000LU) && !(CONFIG_ZTIMER_PERIPH_TIMER_FORCE_CONVERSION)
static ztimer_convert_shift_t _ztimer_convert_shift_usec;
ztimer_clock_t *const ZTIMER_USEC = &_ztimer_convert_shift_usec.super.super;
# else
static ztimer_convert_frac_t _ztimer_convert_frac_usec;
ztimer_clock_t *const ZTIMER_USEC = &_ztimer_convert_frac_usec.super.super;
@ -353,6 +357,15 @@ void ztimer_init(void)
periph_timer_freq);
ztimer_convert_shift_up_init(&_ztimer_convert_shift_usec,
ZTIMER_USEC_BASE, 2);
# elif (ZTIMER_TIMER_FREQ == FREQ_500KHZ) && !(CONFIG_ZTIMER_PERIPH_TIMER_FORCE_CONVERSION)
if (IS_ACTIVE(DEVELHELP) && ((periph_timer_freq < 487500) || (periph_timer_freq > 512500))) {
LOG_WARNING("ZTIMER_USEC from %" PRIu32 " Hz clock with \"left-shift by 1\" frequency conversion\n",
periph_timer_freq);
}
LOG_DEBUG("ztimer_init(): ZTIMER_USEC convert_shift %lu to 1000000\n",
periph_timer_freq);
ztimer_convert_shift_up_init(&_ztimer_convert_shift_usec,
ZTIMER_USEC_BASE, 1);
# else
LOG_DEBUG("ztimer_init(): ZTIMER_USEC convert_frac %lu to 1000000\n",
ZTIMER_TIMER_FREQ);