#include <ao.h>
-volatile __data AO_TICK_TYPE ao_tick_count;
+#define AO_SYSTICK (AO_LPC_SYSCLK / 2)
-uint16_t
+volatile AO_TICK_TYPE ao_tick_count;
+
+AO_TICK_TYPE
ao_time(void)
{
return ao_tick_count;
}
+uint64_t
+ao_time_ns(void)
+{
+ AO_TICK_TYPE before, after;
+ uint32_t cvr;
+
+ do {
+ before = ao_tick_count;
+ cvr = lpc_systick.cvr;
+ after = ao_tick_count;
+ } while (before != after);
+
+ return (uint64_t) after * (1000000000ULL / AO_HERTZ) +
+ (uint64_t) cvr * (1000000000ULL / AO_SYSTICK);
+}
+
#if AO_DATA_ALL
-volatile __data uint8_t ao_data_interval = 1;
-volatile __data uint8_t ao_data_count;
+volatile uint8_t ao_data_interval = 1;
+volatile uint8_t ao_data_count;
#endif
void lpc_systick_isr(void)