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/* led.c */
extern void led_init(void);
extern void led_clear(void);
extern void led_set(void);
extern void led_slow_tick(void);
/* ticker.c */
extern volatile uint32_t ticks;
extern void delay_us(uint32_t d);
extern void sys_tick_handler(void);
extern void delay_ms(uint32_t d);
extern void ticker_init(void);
/* ring.c */
extern void ring_init(volatile ring_t *r, uint8_t *buf, size_t len);
extern int ring_write_byte(volatile ring_t *r, uint8_t c);
extern int ring_read_byte(volatile ring_t *r, uint8_t *c);
extern int ring_write(volatile ring_t *r, uint8_t *buf, size_t len, int blocking);
extern int ring_empty(volatile ring_t *r);
/* usart.c */
extern volatile ring_t rx6_ring;
extern volatile ring_t tx6_ring;
extern void usart6_isr(void);
extern void usart6_queue(uint8_t d);
extern void usart6_drain(void);
extern int usart6_write(char *ptr, int len, int blocking);
extern void usart_init(void);
/* stdio.c */
extern int _open(const char *name, int flags, int mode);
extern int _close(int file);
extern int _write(int file, char *buf, int nbytes);
extern int _read(int file, char *buf, int nbytes);
extern int _fstat(int file, struct stat *st);
extern int _lseek(int file, int offset, int whence);
extern int isatty(int file);
extern void stdio_drain(void);
/* lwip_glue.c */
extern struct netif if0;
extern uint32_t sys_now(void);
extern void dispatch_lwip(void);
extern void start_lwip(void);
/* steth.c */
extern _Bool phy_link_an_done(uint8_t phy);
extern void eth_isr(void);
extern void steth_isr(void);
extern err_t steth_lwip_init(struct netif *netif);
extern void steth_init(void);
extern void steth_dispatch(void);
/* msf.c */
extern void exti0_isr(void);
extern void radio_init(void);
/* abs.c */
extern uint64_t abs_extend(uint32_t now);
extern uint64_t abs_get(void);
extern void abs_slow_tick(void);
/* pll.c */
extern void pll_dispatch(uint64_t edge);
extern void pll_set_offset(EPOCH epoch, uint64_t abs);
extern EPOCH pll_decompose(uint64_t abs);
/* main.c */
extern int main(void);
/* time_fn.c */
extern UTC time_epoch_to_utc(EPOCH epoch);
extern EPOCH time_utc_to_epoch(UTC u);
extern void time_print_utc(UTC u);
extern void time_print_epoch(EPOCH e);
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