mirror of https://github.com/bsnes-emu/bsnes.git
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
auto SharpRTC::rtcRead(uint4 addr) -> uint4 {
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switch(addr) {
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case 0: return second % 10;
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case 1: return second / 10;
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case 2: return minute % 10;
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case 3: return minute / 10;
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case 4: return hour % 10;
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case 5: return hour / 10;
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case 6: return day % 10;
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case 7: return day / 10;
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case 8: return month;
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case 9: return year % 10;
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case 10: return year / 10 % 10;
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case 11: return year / 100;
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case 12: return weekday;
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default: return 0;
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}
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}
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auto SharpRTC::rtcWrite(uint4 addr, uint4 data) -> void {
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switch(addr) {
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case 0: second = second / 10 * 10 + data; break;
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case 1: second = data * 10 + second % 10; break;
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case 2: minute = minute / 10 * 10 + data; break;
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case 3: minute = data * 10 + minute % 10; break;
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case 4: hour = hour / 10 * 10 + data; break;
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case 5: hour = data * 10 + hour % 10; break;
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case 6: day = day / 10 * 10 + data; break;
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case 7: day = data * 10 + day % 10; break;
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case 8: month = data; break;
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case 9: year = year / 10 * 10 + data; break;
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case 10: year = year / 100 * 100 + data * 10 + year % 10; break;
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case 11: year = data * 100 + year % 100; break;
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case 12: weekday = data; break;
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}
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}
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auto SharpRTC::load(const uint8* data) -> void {
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for(auto byte : range(8)) {
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rtcWrite(byte * 2 + 0, data[byte] >> 0);
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rtcWrite(byte * 2 + 1, data[byte] >> 4);
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}
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uint64 timestamp = 0;
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for(auto byte : range(8)) {
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timestamp |= data[8 + byte] << (byte * 8);
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}
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uint64 diff = (uint64)time(0) - timestamp;
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while(diff >= 60 * 60 * 24) { tickDay(); diff -= 60 * 60 * 24; }
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while(diff >= 60 * 60) { tickHour(); diff -= 60 * 60; }
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while(diff >= 60) { tickMinute(); diff -= 60; }
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while(diff--) tickSecond();
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}
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auto SharpRTC::save(uint8* data) -> void {
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for(auto byte : range(8)) {
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data[byte] = rtcRead(byte * 2 + 0) << 0;
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data[byte] |= rtcRead(byte * 2 + 1) << 4;
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}
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uint64 timestamp = (uint64)time(nullptr);
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for(auto byte : range(8)) {
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data[8 + byte] = timestamp;
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timestamp >>= 8;
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}
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}
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