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root@Hills:~/Install/tm1637-simple-library-master# cc -Wall tm1637.c -o tm1637
In file included from tm1637.c:7:
tm1637.c: In function ‘transmission_check_ack’:
tm1637_port.h:31:29: error: expected identifier before ‘(’ token
 #define _us_timer_get()     (0xFF)
                             ^
tm1637.c:81:30: note: in expansion of macro ‘_us_timer_get’
     while (_din_is_high() && _us_timer_get() < 10) {}
                              ^~~~~~~~~~~~~