RX-8025NB Real Time Clock Module by EPSON
Dependents: TYBLE16_simple_data_logger Check_external_RTC
RX8025NB.cpp
- Committer:
- kenjiArai
- Date:
- 2015-06-05
- Revision:
- 0:cdf2921959b4
- Child:
- 1:817e81048235
File content as of revision 0:cdf2921959b4:
/* * mbed library program * Control RX-8025NB Real Time Clock Module * EPSON * * Copyright (c) 2015 Kenji Arai / JH1PJL * http://www.page.sannet.ne.jp/kenjia/index.html * http://mbed.org/users/kenjiArai/ * Created: June 3rd, 2015 * Revised: June 5th, 2015 * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "mbed.h" #include "RX8025NB.h" RX8025::RX8025 (PinName p_sda, PinName p_scl) : _i2c(p_sda, p_scl) { RX8025_addr = RX8025ADDR; } RX8025::RX8025 (I2C& p_i2c) : _i2c(p_i2c) { RX8025_addr = RX8025ADDR; } /////////////// Read RTC data ///////////////////////////// void RX8025::get_time_rtc (tm *t) { read_rtc_std(t); } void RX8025::read_rtc_std (tm *t) { rtc_time time; read_rtc_direct(&time); t->tm_sec = time.rtc_seconds; t->tm_min = time.rtc_minutes; t->tm_hour = time.rtc_hours; t->tm_mday = time.rtc_date; if ( time.rtc_weekday == RTC_Wk_Sunday) { t->tm_wday = 0; // Sun is not 7 but 0 } else { t->tm_wday = time.rtc_weekday; } t->tm_mon = time.rtc_month - 1; t->tm_year = time.rtc_year_raw + 100; t->tm_isdst= 0; } /////////////// Write data to RTC ///////////////////////// void RX8025::set_time_rtc (tm *t) { write_rtc_std(t); } void RX8025::write_rtc_std (tm *t) { rtc_time time; time.rtc_seconds = t->tm_sec; time.rtc_minutes = t->tm_min; time.rtc_hours = t->tm_hour; time.rtc_date = t->tm_mday; if ( t->tm_wday == 0) { time.rtc_weekday = RTC_Wk_Sunday; } else { time.rtc_weekday = t->tm_wday; } time.rtc_month = t->tm_mon + 1; time.rtc_year_raw = t->tm_year - 100; write_rtc_direct(&time); } /////////////// Read/Write specific register ////////////// uint8_t RX8025::read_reg_byte(uint8_t reg) { uint8_t dt[2]; dt[0] = reg; _i2c.write((int)RX8025_addr, (char *)dt, 1, true); _i2c.read((int)RX8025_addr, (char *)dt, 1, false); return dt[0]; } uint8_t RX8025::write_reg_byte(uint8_t reg, uint8_t data) { uint8_t dt[2]; dt[0] = reg; dt[1] = data; _i2c.write((int)RX8025_addr, (char *)dt, 2, false); dt[1] = read_reg_byte(reg); return dt[1]; } /////////////// I2C Freq. ///////////////////////////////// void RX8025::frequency(int hz) { _i2c.frequency(hz); } /////////////// Read/Write RTC another format ///////////// void RX8025::read_rtc_direct (rtc_time *tm) { uint8_t dt; dt = RX8025_REG_SEC; _i2c.write((int)RX8025_addr, (char *)dt, 1, true); _i2c.read((int)RX8025_addr, (char *)rtc_buf, RX8025_REG_CONTL2 + 1, false); tm->rtc_seconds = bcd2bin(rtc_buf[RX8025_REG_SEC] & 0x7f); tm->rtc_minutes = bcd2bin(rtc_buf[RX8025_REG_MIN] & 0x7f); tm->rtc_hours = bcd2bin(rtc_buf[RX8025_REG_HOUR] & 0x3f); tm->rtc_date = bcd2bin(rtc_buf[RX8025_REG_DAY] & 0x3f); tm->rtc_weekday = rtc_buf[RX8025_REG_WDAY] & 0x07; tm->rtc_month = bcd2bin(rtc_buf[RX8025_REG_MON] & 0x1f); tm->rtc_year_raw= bcd2bin(rtc_buf[RX8025_REG_YEAR]); tm->rtc_year = tm->rtc_year_raw + 100 + 1900; } void RX8025::write_rtc_direct (rtc_time *tm) { rtc_buf[RX8025_REG_YEAR + 1] = bin2bcd(tm->rtc_year_raw); rtc_buf[RX8025_REG_MON + 1] = bin2bcd(tm->rtc_month); rtc_buf[RX8025_REG_WDAY + 1] = (tm->rtc_weekday & 0x07); rtc_buf[RX8025_REG_DAY + 1] = bin2bcd(tm->rtc_date); rtc_buf[RX8025_REG_HOUR + 1] = bin2bcd(tm->rtc_hours); rtc_buf[RX8025_REG_MIN + 1] = bin2bcd(tm->rtc_minutes); rtc_buf[RX8025_REG_SEC + 1] = bin2bcd(tm->rtc_seconds); rtc_buf[0] = RX8025_REG_SEC; _i2c.write((int)RX8025_addr, (char *)rtc_buf, 8, false); } uint8_t RX8025::bin2bcd (uint8_t dt) { uint8_t bcdhigh = 0; while (dt >= 10) { bcdhigh++; dt -= 10; } return ((uint8_t)(bcdhigh << 4) | dt); } uint8_t RX8025::bcd2bin (uint8_t dt) { uint8_t tmp = 0; tmp = ((uint8_t)(dt & (uint8_t)0xf0) >> (uint8_t)0x4) * 10; return (tmp + (dt & (uint8_t)0x0f)); }