Introduction - If you have any usage issues, please Google them yourself
The digital clock designs unsigned char Tab [] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90} // control shape unsigned char port [8] = {0xfe, 0xfd and, 0xfb, 0xf7 the number of times the counter variable, 0xef, 0xdf, 0xbf, 0x7f} unsigned char int_time // interrupt unsigned char second // seconds count variable unsigned char minute // min count variable unsigned char hour // hour count variable