X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Flpc%2Fao_timer_lpc.c;h=62b16318107f74fc354783ab8520390ac54d524b;hp=5031333301e1fe61f5911a32fe581f41c58f9ed3;hb=cd920a0e5321166ef8b1d6afc3d63fc5de998a93;hpb=0448b9b638f8599633227a639ef9d8572780bbd9

diff --git a/src/lpc/ao_timer_lpc.c b/src/lpc/ao_timer_lpc.c
index 50313333..62b16318 100644
--- a/src/lpc/ao_timer_lpc.c
+++ b/src/lpc/ao_timer_lpc.c
@@ -18,6 +18,8 @@
 
 #include <ao.h>
 
+#define AO_SYSTICK	(AO_LPC_SYSCLK / 2)
+
 volatile AO_TICK_TYPE ao_tick_count;
 
 AO_TICK_TYPE
@@ -26,6 +28,22 @@ 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 uint8_t	ao_data_interval = 1;
 volatile uint8_t	ao_data_count;