蓝桥杯单片机组，定时器的进阶使用案例

#include <REGX52.H> #include "HC138.h" extern unsigned char code SMG_duanma[18] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80, 0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xbf,0x7f}; void SHOW_SMG(unsigned char pos,unsigned char duanma) { Select_HC138(6); switch(pos) { case 1: P0 = 0x01; break; case 2: P0 = 0x02; break; case 3: P0 = 0x04; break; case 4: P0 = 0x08; break; case 5: P0 = 0x10; break; case 6: P0 = 0x20; break; case 7: P0 = 0x40; break; case 8: P0 = 0x80; break; } Select_HC138(7); switch(duanma) { case 0: P0 = SMG_duanma[0]; break; case 1: P0 = SMG_duanma[1]; break; case 2: P0 = SMG_duanma[2]; break; case 3: P0 = SMG_duanma[3]; break; case 4: P0 = SMG_duanma[4]; break; case 5: P0 = SMG_duanma[5]; break; case 6: P0 = SMG_duanma[6]; break; case 7: P0 = SMG_duanma[7]; break; case 8: P0 = SMG_duanma[8]; break; case 9: P0 = SMG_duanma[9]; break; case 10: P0 = SMG_duanma[16]; break; } }