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-rw-r--r--app/prototypes.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/app/prototypes.h b/app/prototypes.h
index f153902..967b9b8 100644
--- a/app/prototypes.h
+++ b/app/prototypes.h
@@ -16,7 +16,7 @@ extern void ring_init(ring_t *r, uint8_t *buf, size_t len);
extern int ring_write_byte(ring_t *r, uint8_t c);
extern int ring_empty(ring_t *r);
extern int ring_read_byte(ring_t *r, uint8_t *c);
-extern int ring_write(ring_t *r, uint8_t *buf, size_t len);
+extern int ring_write(ring_t *r, const uint8_t *buf, size_t len);
/* usart.c */
extern ring_t usart_rx_ring;
extern ring_t usart_tx_ring;
@@ -32,4 +32,5 @@ extern void ticker_init(void);
/* timex.c */
extern ring_t timex_ring;
extern void timex_tick(void);
+extern uint8_t ex[];
extern void timex_init(void);