Diff: RTC8564.cpp

Revision:

0:863510ffa8ff

Child:

1:d1b58c478a7a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RTC8564.cpp	Sat Mar 14 05:00:12 2015 +0000
@@ -0,0 +1,165 @@
+/*
+ * mbed library program
+ *  Control RTC-8564NB Real Time Clock Module
+ *  EPSON TOYOCOM
+ *
+ * Copyright (c) 2015 Kenji Arai / JH1PJL
+ *  http://www.page.sannet.ne.jp/kenjia/index.html
+ *  http://mbed.org/users/kenjiArai/
+ *      Created: Feburary   1st, 2015
+ *      Revised: March     14th, 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 "RTC8564.h"
+
+RTC8564::RTC8564 (PinName p_sda, PinName p_scl) : _i2c(p_sda, p_scl)
+{
+    RTC8564_addr = RTC8564ADDR;
+}
+
+RTC8564::RTC8564 (I2C& p_i2c) : _i2c(p_i2c)
+{
+    RTC8564_addr = RTC8564ADDR;
+}
+
+/////////////// Read RTC data /////////////////////////////
+void RTC8564::get_time_rtc (tm *t)
+{
+    read_rtc_std(t);
+}
+
+void RTC8564::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 RTC8564::set_time_rtc (tm *t)
+{
+    write_rtc_std(t);
+}
+
+void RTC8564::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 RTC8564::read_reg_byte(uint8_t reg)
+{
+    uint8_t dt[2];
+
+    dt[0] = reg;
+    _i2c.write((int)RTC8564_addr, (char *)dt, 1, true);
+    _i2c.read((int)RTC8564_addr, (char *)dt, 1, false);
+    return dt[0];
+}
+
+uint8_t RTC8564::write_reg_byte(uint8_t reg, uint8_t data)
+{
+    uint8_t dt[2];
+
+    dt[0] = reg;
+    dt[1] = data;
+    _i2c.write((int)RTC8564_addr, (char *)dt, 2, false);
+    dt[1] = read_reg_byte(reg);
+    return dt[1];
+}
+
+/////////////// I2C Freq. /////////////////////////////////
+void RTC8564::frequency(int hz)
+{
+    _i2c.frequency(hz);
+}
+
+/////////////// Read/Write RTC another format /////////////
+void RTC8564::read_rtc_direct (rtc_time *tm)
+{
+    uint8_t dt;
+
+    dt = RTC8564_REG_CONTL1;
+    _i2c.write((int)RTC8564_addr, (char *)dt, 1, true);
+    _i2c.read((int)RTC8564_addr, (char *)rtc_buf, RTC8564_REG_TIMER + 1, false);
+    tm->rtc_seconds = bcd2bin(rtc_buf[RTC8564_REG_SEC]  & 0x7f);
+    tm->rtc_minutes = bcd2bin(rtc_buf[RTC8564_REG_MIN]  & 0x7f);
+    tm->rtc_hours   = bcd2bin(rtc_buf[RTC8564_REG_HOUR] & 0x3f);
+    tm->rtc_date    = bcd2bin(rtc_buf[RTC8564_REG_DAY]  & 0x3f);
+    tm->rtc_weekday = rtc_buf[RTC8564_REG_WDAY] & 0x07;
+    tm->rtc_month   = bcd2bin(rtc_buf[RTC8564_REG_MON]  & 0x1f);
+    tm->rtc_year_raw= bcd2bin(rtc_buf[RTC8564_REG_YEAR]);
+    tm->rtc_year = tm->rtc_year_raw + 100 + 1900;
+}
+
+void RTC8564::write_rtc_direct (rtc_time *tm)
+{
+    uint8_t dt[2];
+
+    rtc_buf[RTC8564_REG_YEAR - 1] = bin2bcd(tm->rtc_year_raw);
+    rtc_buf[RTC8564_REG_MON  - 1] = bin2bcd(tm->rtc_month);
+    rtc_buf[RTC8564_REG_WDAY - 1] = (tm->rtc_weekday & 0x07);
+    rtc_buf[RTC8564_REG_DAY  - 1] = bin2bcd(tm->rtc_date);
+    rtc_buf[RTC8564_REG_HOUR - 1] = bin2bcd(tm->rtc_hours);
+    rtc_buf[RTC8564_REG_MIN  - 1] = bin2bcd(tm->rtc_minutes);
+    rtc_buf[RTC8564_REG_SEC  - 1] = bin2bcd(tm->rtc_seconds);
+    dt[0] = RTC8564_REG_CONTL1;
+    dt[1] = 0x20;
+    _i2c.write((int)RTC8564_addr, (char *)dt, 2, false);
+    rtc_buf[0] = RTC8564_REG_SEC;
+    _i2c.write((int)RTC8564_addr, (char *)rtc_buf, 8, false);
+    dt[0] = RTC8564_REG_CONTL1;
+    dt[1] = 0x00;
+    _i2c.write((int)RTC8564_addr, (char *)dt, 2, false);
+}
+
+uint8_t RTC8564::bin2bcd (uint8_t dt)
+{
+    uint8_t bcdhigh = 0;
+
+    while (dt >= 10) {
+        bcdhigh++;
+        dt -= 10;
+    }
+    return  ((uint8_t)(bcdhigh << 4) | dt);
+}
+
+uint8_t RTC8564::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));
+}