Diff: main.cpp

Revision:

1:48b423c65bcb

Parent:

0:92bedc4e1536

--- a/main.cpp	Sun Aug 25 22:14:04 2013 +0000
+++ b/main.cpp	Fri Jun 26 17:53:08 2015 +0000
@@ -1,64 +1,81 @@
 #include "mbed.h"
 #include "KL25Z_RTC.h"
 
-
 DigitalOut myled(LED1);
 Serial pc(USBTX, USBRX);
 
-// Init the RTC module with an alarm value of 15 sec.
-KL25Z_RTC rtc( 15);
-
-// Callback user function
-void alm ( void);
-void sec ( void);
+// Init the RTC module.
+KL25Z_RTC rtc(NULL);
 
-// Function to put in sleep or deepsleep the ARM Core.
-#define SCB_SCR_SLEEPDEEP_MASK                   0x4u
-void sleep( void);
-void deepsleep (void);
+// Hardware warning!!!!! 
+// Hardware warning!!!!! 
+// Hardware warning!!!!! 
+// Hardware warning!!!!! 
+// To enable the rtc on the kl25z, a jumper must be placed between PTC1 (J10, pin 12) and PTC3 (J1, pin 3) and the resistor R24 must
+// be removed from the board: https://developer.mbed.org/questions/5706/Which-one-is-R24/
+// These changes allow for the application of an internal 32 khz reference signal on the RTC clock in pin (PTC1).  Without both of 
+// these hardware mods, the real time clock will not increment
+ 
+void set_CLKOUT32k(void){ 
+    MCG->C1 |= MCG_C1_IRCLKEN_MASK; // Enable the internal reference clock. MCGIRCLK is active.
+    MCG->C2 &= ~(MCG_C2_IRCS_MASK); // Select the slow internal reference clock source.
+    SIM->SOPT1 &= ~SIM_SOPT1_OSC32KSEL_MASK; 
+    //SIM->SOPT1 |= SIM_SOPT1_OSC32KSEL(0x2); // Select 32 KHz clock source as RTC_CLKIN
+    SIM->SOPT2 |= SIM_SOPT2_CLKOUTSEL(0x4); // Set PTC3 as CLKOUT pin for MCGIRCLK
+    SIM->SCGC5|=SIM_SCGC5_PORTC_MASK;       //Enable Clock to Port C 
+    PORTC->PCR[3] |= (PORT_PCR_MUX(0x5)); // Select the MCGIRCLK clock to output on the CLKOUT pin.
+}
+ 
+void SetDateTime
+(int           year = 2015
+,int           mon = 5
+,int           day = 26
+,int           hour = 10
+,int           min = 0
+,int           sec = 0
+)
+{
+    struct     tm Clock;
+    Clock.tm_year = year - 1900;
+    Clock.tm_mon  = mon;
+    Clock.tm_mday = day;
+    Clock.tm_hour = hour;
+    Clock.tm_min  = min;
+    Clock.tm_sec  = sec;
+    time_t epoch = mktime(&Clock);
+    if (epoch == (time_t) -1) {
+        error("Error in clock setting\r\n");        
+    }
+    set_time(epoch);
+}   
 
-unsigned int count;
-
+void ShowDateTime()
+{
+    char       str[32];
+    time_t     seconds = time(NULL);
+    struct tm *tminfo = localtime(&seconds);
+ 
+    strftime(str, 32, "%F,%T", tminfo);
+    printf("RTC: %s\r\n", str);
+}
+ 
 int main() {
     
-    pc.baud( 230400);
-    pc.printf("RTC Management.\r\n");
-
-    // rtc.RTC_Start( &sec, &alm);
-    rtc.RTC_Start( NULL, &alm);
-    pc.printf("Alarm configured [15sec], ");
-    
-    count=0;
+    pc.baud( 9600);
+    set_CLKOUT32k();
+    rtc.RTC_Start();
+ 
+    SetDateTime();
     while(1) 
     {
-        //
-        pc.printf("enter sleep...\r\n");
-        deepsleep();
-        
-        pc.printf("exit sleep: %d\r\n", ++count);
+     
+        ShowDateTime();
+        myled=0;
+        wait_ms(200);
+        myled=1;
+        wait_ms(800);
+
     }
 }
 
-void sec ( void)
-{
-    pc.printf("sec\r\n");
-}
-
-void alm ( void)
-{
-    pc.printf("alrm\r\n");
-}    
-
-void sleep( void)
-{
-    SCB->SCR &= ~SCB_SCR_SLEEPDEEP_MASK;
-    __wfi();
-}
-
-void deepsleep (void)
-{
-  /* Set the SLEEPDEEP bit to enable deep sleep mode (STOP) */
-  SCB->SCR |= SCB_SCR_SLEEPDEEP_MASK;
-
-  __wfi();
-}
\ No newline at end of file
+ 
\ No newline at end of file