extern int interface_jtag_add_sleep(uint32_t us);
extern int interface_jtag_add_clocks(int num_cycles);
extern int interface_jtag_execute_queue(void);
extern int interface_jtag_add_sleep(uint32_t us);
extern int interface_jtag_add_clocks(int num_cycles);
extern int interface_jtag_execute_queue(void);