72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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* Copyright (C) EdgeTX
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*
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* Based on code named
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* opentx - https://github.com/opentx/opentx
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "opentx.h"
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#include "i2c_driver.h"
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#define DS3231_I2C_CHIPID 0x68
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void readRtc()
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{
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uint8_t buffer[7];
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uint8_t address[]= {0};
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gtm utm;
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int res = i2cReadBuffer(DS3231_I2C_CHIPID, address, 1, buffer, 7);
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if (res != 0)
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return;
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// Set the date and time
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utm.tm_sec = fromBCD(buffer[0] & 0x7F);
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utm.tm_min = fromBCD(buffer[1] & 0x7F);
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utm.tm_hour = fromBCD(buffer[2] & 0x3F);
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utm.tm_mday = fromBCD(buffer[4] & 0x3F);
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utm.tm_mon = fromBCD(buffer[5] & 0x1F) - 1;
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utm.tm_year = fromBCD(buffer[6]) + 100;
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g_rtcTime = gmktime(&utm);
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}
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void writeRtc(const gtm* ptr)
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{
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g_ms100 = 0; // start of next second begins now
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uint8_t buffer[7];
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uint8_t address[]= {0};
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buffer[0] = toBCD(ptr->tm_sec);
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buffer[1] = toBCD(ptr->tm_min);
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buffer[2] = toBCD(ptr->tm_hour);
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buffer[3] = toBCD(ptr->tm_wday);
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buffer[4] = toBCD(ptr->tm_mday);
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buffer[5] = toBCD(ptr->tm_mon + 1);
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uint8_t offset = ptr->tm_year >= 100 ? 100 : 0;
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buffer[6] = toBCD(ptr->tm_year - offset);
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i2cWriteBuffer(DS3231_I2C_CHIPID, address, 1, buffer, 7);
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}
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void rtcSetTime(const struct gtm * t)
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{
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writeRtc(t);
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}
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void rtcInit()
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{
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readRtc();
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}
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