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#include "project.h"
static Event_ring sysclk_ring;
void sysclk_event (void)
{
uint32_t refclk_now = HW_CLOCK_REG;
uint32_t sysclk_now = SCS_DWT_CYCCNT;
sysclk_ring.events[sysclk_ring.tx_ptr].when = refclk_now;
sysclk_ring.events[sysclk_ring.tx_ptr].ptp = ptp_get();
sysclk_ring.events[sysclk_ring.tx_ptr].value = sysclk_now;
sysclk_ring.tx_ptr = (sysclk_ring.tx_ptr + 1) & ERING_MASK;
}
static uint32_t high_tick;
#define QUARTER (1UL << 29)
#define HALF (1UL << 30)
#define THREE_QUARTERS (HALF+QUARTER)
#define ONE (~(uint32_t)0)
uint64_t sysclk_extend (uint32_t now)
{
static int m;
uint64_t ret;
if (!m) {
ret = high_tick;
ret <<= 32;
ret |= now;
if ((now > THREE_QUARTERS) && (now <= ONE)) {
high_tick++;
m = 1;
}
} else {
if (now < HALF) {
ret = high_tick;
ret <<= 32;
ret |= now;
} else {
ret = high_tick - 1;
ret <<= 32;
ret |= now;
}
if ((now > QUARTER) && (now < HALF))
m = 0;
}
return ret;
}
void sysclk_dispatch (void)
{
//char buf[80];
uint64_t refclk_abs;
uint32_t refclk_now, sysclk_now;
EPOCH e;
//UTC u;
if (sysclk_ring.rx_ptr == sysclk_ring.tx_ptr) return;
sysclk_now = sysclk_ring.events[sysclk_ring.rx_ptr].value;
refclk_now = sysclk_ring.events[sysclk_ring.rx_ptr].when;
sysclk_ring.rx_ptr = (sysclk_ring.rx_ptr + 1) & ERING_MASK;
refclk_abs = ref_extend (refclk_now);
e.s = sysclk_extend (sysclk_now);
e.ns = 0;
report_time ("SYS", e, refclk_abs, "");
}
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