日本的手持pda源码.wince下使用,完全开源
源代码在线查看： rtc.c
#include #include "defs.h" #include "mem.h" #include "rtc.h" struct rtc rtc; static int syncrtc = 1; void rtc_latch(byte b) { if ((rtc.latch ^ b) & b & 1) { rtc.regs[0] = rtc.s; rtc.regs[1] = rtc.m; rtc.regs[2] = rtc.h; rtc.regs[3] = rtc.d; rtc.regs[4] = (rtc.d>>9) | (rtc.stop rtc.regs[5] = 0xff; rtc.regs[6] = 0xff; rtc.regs[7] = 0xff; } rtc.latch = b; } void rtc_write(byte b) { /* printf("write %02X: %02X (%d)\n", rtc.sel, b, b); */ if (!(rtc.sel & 8)) return; switch (rtc.sel & 7) { case 0: rtc.s = rtc.regs[0] = b; while (rtc.s >= 60) rtc.s -= 60; break; case 1: rtc.m = rtc.regs[1] = b; while (rtc.m >= 60) rtc.m -= 60; break; case 2: rtc.h = rtc.regs[2] = b; while (rtc.h >= 24) rtc.h -= 24; break; case 3: rtc.regs[3] = b; rtc.d = (rtc.d & 0x100) | b; break; case 4: rtc.regs[4] = b; rtc.d = (rtc.d & 0xff) | ((b&1) rtc.stop = (b>>6)&1; rtc.carry = (b>>7)&1; break; } } void rtc_tick() { if (rtc.stop) return; if (++rtc.t == 60) { if (++rtc.s == 60) { if (++rtc.m == 60) { if (++rtc.h == 24) { if (++rtc.d == 365) { rtc.d = 0; rtc.carry = 1; } rtc.h = 0; } rtc.m = 0; } rtc.s = 0; } rtc.t = 0; } } void rtc_save_internal(FILE *f) { fprintf(f, "%d %d %d %02d %02d %02d %02d\n%d\n", rtc.carry, rtc.stop, rtc.d, rtc.h, rtc.m, rtc.s, rtc.t, time(0)); } void rtc_load_internal(FILE *f) { int rt = 0; fscanf( f, "%d %d %d %02d %02d %02d %02d\n%d\n", &rtc.carry, &rtc.stop, &rtc.d, &rtc.h, &rtc.m, &rtc.s, &rtc.t, &rt); while (rtc.t >= 60) rtc.t -= 60; while (rtc.s >= 60) rtc.s -= 60; while (rtc.m >= 60) rtc.m -= 60; while (rtc.h >= 24) rtc.h -= 24; while (rtc.d >= 365) rtc.d -= 365; rtc.stop &= 1; rtc.carry &= 1; if (rt) rt = (time(0) - rt) * 60; if (syncrtc) while (rt-- > 0) rtc_tick(); }
