apps/plugins/rockboy/rtc.c at master · tsiry-sandratraina.com/rockbox-zig

tsiry-sandratraina.com / rockbox-zig

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A modern Music Player Daemon based on Rockbox open source high quality audio player

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rockbox-zig / apps / plugins / rockboy / rtc.c

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Thomas Martitz Move c/h files implementing/defining standard library stuff into a new libc directory, also standard'ify some parts of the code base (almost entirely #include fixes). This is to a) to cleanup firmware/common and firmware/include a bit, but also b) for Rockbox as an application which should use the host system's c library and headers, separating makes it easy to exclude our files from the build. 16y ago

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  4#include "rockmacros.h"
  5#include <stdio.h>
  6
  7#include "defs.h"
  8#include "mem.h"
  9#include "rtc-gb.h"
 10
 11struct rtc rtc;
 12
 13void rtc_latch(byte b)
 14{
 15    if ((rtc.latch ^ b) & b & 1)
 16    {
 17        rtc.regs[0] = rtc.s;
 18        rtc.regs[1] = rtc.m;
 19        rtc.regs[2] = rtc.h;
 20        rtc.regs[3] = rtc.d;
 21        rtc.regs[4] = (rtc.d>>9) | (rtc.stop<<6) | (rtc.carry<<7);
 22        rtc.regs[5] = 0xff;
 23        rtc.regs[6] = 0xff;
 24        rtc.regs[7] = 0xff;
 25    }
 26    rtc.latch = b;
 27}
 28
 29void rtc_write(byte b)
 30{
 31    /* printf("write %02X: %02X (%d)\n", rtc.sel, b, b); */
 32    if (!(rtc.sel & 8)) return;
 33    switch (rtc.sel & 7)
 34    {
 35    case 0:
 36        rtc.s = rtc.regs[0] = b;
 37        while (rtc.s >= 60) rtc.s -= 60;
 38        break;
 39    case 1:
 40        rtc.m = rtc.regs[1] = b;
 41        while (rtc.m >= 60) rtc.m -= 60;
 42        break;
 43    case 2:
 44        rtc.h = rtc.regs[2] = b;
 45        while (rtc.h >= 24) rtc.h -= 24;
 46        break;
 47    case 3:
 48        rtc.regs[3] = b;
 49        rtc.d = (rtc.d & 0x100) | b;
 50        break;
 51    case 4:
 52        rtc.regs[4] = b;
 53        rtc.d = (rtc.d & 0xff) | ((b&1)<<9);
 54        rtc.stop = (b>>6)&1;
 55        rtc.carry = (b>>7)&1;
 56        break;
 57    }
 58}
 59
 60void rtc_tick(void)
 61{
 62    if (rtc.stop) return;
 63    if (++rtc.t == 60)
 64    {
 65        if (++rtc.s == 60)
 66        {
 67            if (++rtc.m == 60)
 68            {
 69                if (++rtc.h == 24)
 70                {
 71                    if (++rtc.d == 365)
 72                    {
 73                        rtc.d = 0;
 74                        rtc.carry = 1;
 75                    }
 76                    rtc.h = 0;
 77                }
 78                rtc.m = 0;
 79            }
 80            rtc.s = 0;
 81        }
 82        rtc.t = 0;
 83    }
 84}
 85
 86void rtc_save_internal(int fd)
 87{
 88    int rt = 0;
 89    
 90#if CONFIG_RTC
 91    rt = rb->mktime(rb->get_time());
 92#endif
 93    fdprintf(fd, "%d %d %d %d %d %d %d %d\n", rtc.carry, rtc.stop, rtc.d, rtc.h,
 94             rtc.m, rtc.s, rtc.t, rt);
 95}
 96
 97void rtc_load_internal(int fd)
 98{
 99    int rt = 0;
100    char buf[32];
101    
102    rb->read_line(fd, buf, sizeof(buf));
103    sscanf(buf, "%d %d %d %d %d %d %d %d\n", &rtc.carry, &rtc.stop, &rtc.d, 
104           &rtc.h, &rtc.m, &rtc.s, &rtc.t, &rt);    
105    
106	while (rtc.t >= 60) rtc.t -= 60;
107	while (rtc.s >= 60) rtc.s -= 60;
108	while (rtc.m >= 60) rtc.m -= 60;
109	while (rtc.h >= 24) rtc.h -= 24;
110	while (rtc.d >= 365) rtc.d -= 365;
111	rtc.stop &= 1;
112	rtc.carry &= 1;
113
114#if CONFIG_RTC    
115    if (rt) rt = (rb->mktime(rb->get_time()) - rt) * 60;
116#endif
117    while (rt-- > 0) rtc_tick();
118
119}
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