InetrfaceProducts NXP / Mbed 2 deprecated PCF2127_Hello

Demo code for PCF2127 (and PCF2129) library. Setting of time and displaying can be done on PC-terminal application through the USB Serial Port. PCF2127 and PCF2129 are high accuracy real-time-clock (RTC) module. This library provides simple interface to accessing clock information.

Dependencies:   PCF2127 mbed

Demo code for PCF2127 library

Information

The "PCF2127" library works for PCF2127T, PCF2127AT, PCF2129T and PCF2129AT.

The device information is available on the component page and the library page.

PCF2127T
PCF2127T is in SO16 package

main.cpp@0:658f351580f0, 2014-12-09 (annotated)

Committer:
nxp_ip
Date:
Tue Dec 09 07:23:50 2014 +0000
Revision:
0:658f351580f0
Child:
1:86dc8dfe6a20
A sample code for PCF2127 library. Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxp_ip 0:658f351580f0 1 /*
nxp_ip 0:658f351580f0 2 * A sample code for PCF2127 library
nxp_ip 0:658f351580f0 3 *
nxp_ip 0:658f351580f0 4 * @author Akifumi (Tedd) OKANO, NXP Semiconductors
nxp_ip 0:658f351580f0 5 * @version 1.6
nxp_ip 0:658f351580f0 6 * @date 09-Dec-2014
nxp_ip 0:658f351580f0 7 *
nxp_ip 0:658f351580f0 8 * PCF2127 is a "real time clock (RTC)" module which is including a Xtal and TCXO
nxp_ip 0:658f351580f0 9 * http://www.nxp.com/products/interface_and_connectivity/real_time_clocks/rtcs_with_temp_compensation/series/PCF2127.html
nxp_ip 0:658f351580f0 10 *
nxp_ip 0:658f351580f0 11 * RTC initializing part is ported from..
nxp_ip 0:658f351580f0 12 * http://mbed.org/users/roen/notebook/real-time/
nxp_ip 0:658f351580f0 13 *
nxp_ip 0:658f351580f0 14 * This code is refined version of..
nxp_ip 0:658f351580f0 15 * http://developer.mbed.org/users/okano/code/NXP_PCF2127A/
nxp_ip 0:658f351580f0 16 */
nxp_ip 0:658f351580f0 17 */
nxp_ip 0:658f351580f0 18
nxp_ip 0:658f351580f0 19 #include "mbed.h"
nxp_ip 0:658f351580f0 20 #include "PCF2127.h"
nxp_ip 0:658f351580f0 21
nxp_ip 0:658f351580f0 22 PCF2127 rtc( p28, p27 );
nxp_ip 0:658f351580f0 23
nxp_ip 0:658f351580f0 24 void show_time( void );
nxp_ip 0:658f351580f0 25 void set_time( void );
nxp_ip 0:658f351580f0 26
nxp_ip 0:658f351580f0 27 int main()
nxp_ip 0:658f351580f0 28 {
nxp_ip 0:658f351580f0 29 printf( "PCF2127 demo started.\r\n" );
nxp_ip 0:658f351580f0 30
nxp_ip 0:658f351580f0 31 if ( rtc.is_init_required() ) {
nxp_ip 0:658f351580f0 32 set_time();
nxp_ip 0:658f351580f0 33 }
nxp_ip 0:658f351580f0 34
nxp_ip 0:658f351580f0 35 while ( 1 ) {
nxp_ip 0:658f351580f0 36 show_time();
nxp_ip 0:658f351580f0 37 wait( 0.25 );
nxp_ip 0:658f351580f0 38 }
nxp_ip 0:658f351580f0 39 }
nxp_ip 0:658f351580f0 40
nxp_ip 0:658f351580f0 41 void show_time( void )
nxp_ip 0:658f351580f0 42 {
nxp_ip 0:658f351580f0 43 struct tm dt, *dtp;
nxp_ip 0:658f351580f0 44 time_t t;
nxp_ip 0:658f351580f0 45 char s[ 30 ];
nxp_ip 0:658f351580f0 46
nxp_ip 0:658f351580f0 47 dtp = &dt;
nxp_ip 0:658f351580f0 48
nxp_ip 0:658f351580f0 49 rtc.clear_intr();
nxp_ip 0:658f351580f0 50
nxp_ip 0:658f351580f0 51 // get time information from PCF2127
nxp_ip 0:658f351580f0 52 if ( PCF2127::TIME_FUNC_ERROR == (t = rtc.time( NULL )) )
nxp_ip 0:658f351580f0 53 {
nxp_ip 0:658f351580f0 54 printf( "error at reading time\r\n" );
nxp_ip 0:658f351580f0 55 return;
nxp_ip 0:658f351580f0 56 }
nxp_ip 0:658f351580f0 57
nxp_ip 0:658f351580f0 58 dtp = localtime( &t );
nxp_ip 0:658f351580f0 59
nxp_ip 0:658f351580f0 60 // print time and date on terminal
nxp_ip 0:658f351580f0 61 strftime( s, 30, "%H:%M:%S, %Y/%b/%d %a", dtp );
nxp_ip 0:658f351580f0 62 printf( "%s\r\n", s );
nxp_ip 0:658f351580f0 63 }
nxp_ip 0:658f351580f0 64
nxp_ip 0:658f351580f0 65 void set_time( void )
nxp_ip 0:658f351580f0 66 {
nxp_ip 0:658f351580f0 67 #define MAX_CHAR_LENGTH 21
nxp_ip 0:658f351580f0 68 char s[ MAX_CHAR_LENGTH ];
nxp_ip 0:658f351580f0 69
nxp_ip 0:658f351580f0 70 printf( "Enter current date and time:\r\n" );
nxp_ip 0:658f351580f0 71 printf( "YYYY MM DD HH MM SS[enter]\r\n" );
nxp_ip 0:658f351580f0 72
nxp_ip 0:658f351580f0 73 fgets( s, MAX_CHAR_LENGTH, stdin );
nxp_ip 0:658f351580f0 74 printf( "user input: \"%s\"\r\n", s );
nxp_ip 0:658f351580f0 75
nxp_ip 0:658f351580f0 76 rtc.set_time( s );
nxp_ip 0:658f351580f0 77 }