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-rw-r--r--firmware/backlight.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/firmware/backlight.c b/firmware/backlight.c
index 3d40a92..72042b7 100644
--- a/firmware/backlight.c
+++ b/firmware/backlight.c
@@ -107,7 +107,9 @@ void backlight_tick(void)
void backlight_init(void)
{
+#ifdef HAVE_RTC
rtc_write(0x0a, 0x40); /* Enable square wave */
+#endif
queue_init(&backlight_queue);
create_thread(backlight_thread, backlight_stack, sizeof(backlight_stack));
backlight_on();