System time: Init from rtc on startup, update in timer inerrupt.

1 files changed, 11 insertions, 2 deletions

diff --git a/avr/timer.c b/avr/timer.c
index 7907bba..e222e68 100644
--- a/avr/timer.c
+++ b/avr/timer.c
@@ -4,6 +4,7 @@
 #include "common.h"
 #include <avr/interrupt.h>
 #include <util/atomic.h>
+#include "time.h"
 #include "timer.h"
 
 /* timer interrupt/overflow counter */
@@ -18,7 +19,8 @@ uint32_t timestamp;
 ISR(TIMER3_COMPA_vect)
 {
 	static int_fast8_t tick_10ms;
-	int_fast8_t i;
+	static int_fast8_t tick_1s;
+	int_fast8_t i, j;
 
 	extern void disk_timerproc(void);
 
@@ -26,11 +28,18 @@ ISR(TIMER3_COMPA_vect)
 
 	i = tick_10ms + 1;
 	if (i == 10) {
-		i = 0;
 		Stat |= S_10MS_TO;
 
 		/* Drive timer procedure of low level disk I/O module */
 		disk_timerproc();
+
+		j = tick_1s - 1;
+		if (j == 0) {
+			system_tick();
+			j = 100;
+		}
+		tick_1s = j;
+		i = 0;
 	}
 	tick_10ms = i;
 }