RX-8025NB Real Time Clock Module by EPSON
Dependents: TYBLE16_simple_data_logger Check_external_RTC
Diff: RX8025NB.cpp
- Revision:
- 0:cdf2921959b4
- Child:
- 1:817e81048235
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RX8025NB.cpp Fri Jun 05 10:43:42 2015 +0000 @@ -0,0 +1,157 @@ +/* + * 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)); +}