X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flpc%2Fao_timer_lpc.c;h=62b16318107f74fc354783ab8520390ac54d524b;hb=efc2c093819b3ec2e5743126efb76d3a9c0ad231;hp=8999c7acf1af925e67d17125320644f503811eae;hpb=c6e57291d91f1f6c4de5c54a5cfd3eef66d9f830;p=fw%2Faltos

diff --git a/src/lpc/ao_timer_lpc.c b/src/lpc/ao_timer_lpc.c
index 8999c7ac..62b16318 100644
--- a/src/lpc/ao_timer_lpc.c
+++ b/src/lpc/ao_timer_lpc.c
@@ -18,14 +18,32 @@
 
 #include <ao.h>
 
+#define AO_SYSTICK	(AO_LPC_SYSCLK / 2)
+
 volatile AO_TICK_TYPE ao_tick_count;
 
-uint16_t
+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 uint8_t	ao_data_interval = 1;
 volatile uint8_t	ao_data_count;