Diff: main.cpp

Revision:

0:4c51ee480cf6

diff -r 000000000000 -r 4c51ee480cf6 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jan 28 07:54:03 2015 +0000
@@ -0,0 +1,146 @@
+    
+
+/*This is the clock which used highly quality RTC module RT8564NB. 
+This module is I2C controllable. At the time of poweron/reset, the start 
+time received from ntp server. 
+ */
+#include "mbed.h"
+
+
+ 
+#define RTC8564NB_ADR 0xA2
+ 
+#define CONTROL1 0x00
+#define CONTROL2 0x01
+#define SECONDS 0x02
+#define MINUTES 0x03
+#define HOURS 0x04
+#define DAYS 0x05
+#define WEEKDAYS 0x06
+#define MONTHS 0x07
+#define YEARS 0x08
+#define MINUTE_ALARM 0x09
+#define HOUR_ALARM 0x0A
+#define DAY_ALARM 0x0B
+#define WEEKDAY_ALARM 0x0C
+#define CLOCKOUT_FREQ 0x0D
+#define TIMER_CINTROL 0x0E
+#define TIMER 0x0F
+#define _READ 0x01
+ 
+Serial pc(USBTX, USBRX); // tx, rx 
+
+
+I2C i2c(p28, p27);
+int offset_JAPAN = 32400;
+ 
+char year, month, day, week;
+char hour, minute, sec;
+char ntp_year[3], ntp_month[3], ntp_day[3], ntp_week[4];
+char ntp_hour[3], ntp_minute[3], ntp_sec[3];
+char week_val;
+ 
+char week_chr[7][4] = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
+    
+void rtc_write(char address, char value)
+{
+    i2c.start();
+    i2c.write(RTC8564NB_ADR);
+    i2c.write(address);
+    i2c.write(value);
+    i2c.stop();
+}
+ 
+char rtc_read(char address)
+{
+    char value;
+    i2c.start();
+    i2c.write(RTC8564NB_ADR);
+    i2c.write(address);
+    i2c.start();
+    i2c.write(RTC8564NB_ADR | _READ);
+    value = i2c.read(0);
+    i2c.stop();
+    
+    return value;
+}
+    
+int main() {
+
+    pc.printf("RTC8564NB CLOCK" );
+    wait(2.0);
+    
+   
+    
+    /* Set up NTP */
+    pc.printf("Setting up NTP\n");
+
+    
+    //time_t seconds = time(NULL)+offset_JAPAN;
+    
+    time_t seconds = time(NULL);
+    
+
+    strftime(ntp_year, 16, "%y", localtime(&seconds));
+    strftime(ntp_month, 16, "%m", localtime(&seconds));
+    strftime(ntp_day, 16, "%d", localtime(&seconds));
+    strftime(ntp_week, 16, "%a", localtime(&seconds));
+    strftime(ntp_hour, 16, "%H", localtime(&seconds));
+    strftime(ntp_minute, 16, "%M", localtime(&seconds));
+    strftime(ntp_sec, 16, "%S", localtime(&seconds));
+    
+    switch (ntp_week[0]){
+        case 'S': 
+            switch (ntp_week[1]) {
+                case 'u': week_val = 0x00; break;
+                case 'a': week_val = 0x06; break;
+            }
+            break;
+        case 'M': week_val = 0x01; break;
+        case 'T': 
+            switch (ntp_week[1]) {
+                case 'u': week_val = 0x02; break;
+                case 'h': week_val = 0x04; break;
+            }
+            break;
+        case 'W': week_val = 0x03; break;
+        case 'F': week_val = 0x05; break;
+    }
+        
+    rtc_write(CONTROL1, 0x20); //stop
+    rtc_write(CONTROL2, 0x00);
+    rtc_write(YEARS, ((ntp_year[0]-0x30)<<4)+(ntp_year[1]-0x30)); 
+    rtc_write(MONTHS, ((ntp_month[0]-0x30)<<4)+(ntp_month[1]-0x30));
+    rtc_write(DAYS, ((ntp_day[0]-0x30)<<4)+(ntp_day[1]-0x30));
+    rtc_write(HOURS, ((ntp_hour[0]-0x30)<<4)+(ntp_hour[1]-0x30));
+    rtc_write(MINUTES, ((ntp_minute[0]-0x30)<<4)+(ntp_minute[1]-0x30));
+    rtc_write(SECONDS, ((ntp_sec[0]-0x30)<<4)+(ntp_sec[1]-0x30));
+    rtc_write(WEEKDAYS, week_val);
+    rtc_write(CLOCKOUT_FREQ, 0x00); // 0x83 = TE on & 1Hz
+    rtc_write(TIMER_CINTROL, 0x00);
+    rtc_write(CONTROL1, 0x00); //start
+    
+    while(1) { 
+        year = rtc_read(YEARS);
+        month = rtc_read(MONTHS);
+        day = rtc_read(DAYS);
+        week = rtc_read(WEEKDAYS);
+        hour = rtc_read(HOURS);
+        minute = rtc_read(MINUTES);
+        sec = rtc_read(SECONDS);
+  
+        pc.printf("20%c%c/%c%c/%c%c %s\n",
+            ((year >> 4) & 0x03) + 0x30, (year & 0x0F) + 0x30, 
+                ((month >> 4) & 0x01) + 0x30, (month & 0x0F) + 0x30, 
+                    ((day >> 4) & 0x03)+ 0x30, (day & 0x0F) + 0x30, 
+                        week_chr[week & 0x07]);
+    
+        pc.printf("%c%c:%c%c:%c%c\n",
+            ((hour >> 4) & 0x03) + 0x30, (hour & 0x0F) + 0x30, 
+                (minute >> 4) + 0x30, (minute & 0x0F) + 0x30, 
+                    (sec >> 4) + 0x30, (sec & 0x0F) + 0x30 );
+        wait(1.0);
+    }
+}
+
+