Diff: main.cpp

Revision:

0:e13d786ba650

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Jun 05 02:18:50 2010 +0000
@@ -0,0 +1,89 @@
+/*
+ *  PCF2127A (Integrated RTC, TCXO and quartz crystal) demo
+ *
+ *  PCF2127A is a "real time clock (RTC)" module which is including a Xtal and TCXO 
+ *  http://www.nxp.com/pip/PCF2127A_2.html
+ *
+ *  This is a just simple operation sample of the PCF2127A.
+ *  In this sample, the PCF2127A is interfaced by I2C through pin9 and 10 of mbed. 
+ *  And also the mbed-pin8 is connected to RTC's /INT pin. 
+ *  The RTC chip is set to generate periodical interrupt in every seconds. 
+ *  This interrupt triggers the update of the terminal and LCD screen. 
+ *  
+ *  RTC initializing part is ported from...
+ *    http://mbed.org/users/roen/notebook/real-time/
+ *
+ *  Released under the MIT License: http://mbed.org/license/mit
+ *
+ *  revision 1.0    05-Jun-2010     (a) 1st release
+ *  revision 1.1    05-Jun-2010     (a) class name changed
+ *                              
+ */
+
+#include "mbed.h"
+#include "TextLCD.h"
+#include "NXP_PCF2127A.h"
+
+TextLCD         lcd(p24, p25, p26, p27, p28, p29, p30); // rs, rw, e, d0, d1, d2, d3
+NXP_PCF2127A    rtc( p9, p10 );
+InterruptIn     intr( p8 );
+BusOut          leds( LED4, LED3, LED2, LED1 );
+
+void time_intr( void );
+void led_ctrl( void );
+
+int main() {
+    printf( "----------------- PCF2127 demo started.\r\n" );
+
+    leds    = 1;
+
+    if ( rtc.is_init_required() ) {
+        lcd.locate( 0, 0 );
+        lcd.printf( "please set time from terminal" );
+        
+        rtc.set_time();
+        
+        lcd.cls();
+    }
+
+    intr.fall( &time_intr );
+
+    while ( 1 )
+        ;
+}
+
+
+void time_intr( void ) {
+    struct tm   dt, *dtp;
+    time_t      t;
+    char        s[ 30 ];
+    dtp = &dt;
+
+    rtc.clear_intr();
+
+    t       = rtc.time( NULL );
+    dtp     = localtime( &t );
+
+    strftime( s, 30, "%H:%M:%S, %Y/%b/%d %a", dtp );
+    printf( "%s\r\n", s );
+
+    strftime( s, 20, "%H:%M:%S PCF2127", dtp );
+    lcd.locate( 0, 0 );
+    lcd.printf( "%s", s );
+
+    strftime( s, 20, "%Y/%b/%d(%a)", dtp );
+    lcd.locate( 0, 1 );
+    lcd.printf( "%s", s );
+    
+    led_ctrl();
+}
+
+
+void led_ctrl( void )
+{
+    static char direction   = true;
+    
+    leds        = direction ? leds << 1 : leds >> 1;
+    direction   = (leds & 0x9) ? !direction : direction;
+}
+