anthony harivel / Simple_DCF77_KL25Z

This is a simple way but yet efficient to get DCF77 information out of the FRDM_KL25Z. It simply outputs the time and date every minutes. With that, you can easily change and modify the code to your conveniance and add a display, a RTC...

Dependencies:   mbed

main.cpp@0:e2c2d9435339, 2013-11-11 (annotated)

Committer:
auxtony78
Date:
Mon Nov 11 11:18:17 2013 +0000
Revision:
0:e2c2d9435339
initial release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
auxtony78 0:e2c2d9435339 1 /*
auxtony78 0:e2c2d9435339 2 * ----------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 3 * "THE BEER-WARE LICENSE" (Revision 42):
auxtony78 0:e2c2d9435339 4 * <anthony.harivel@gmail.com> wrote this file. As long as you retain this notice you
auxtony78 0:e2c2d9435339 5 * can do whatever you want with this stuff. If we meet some day, and you think
auxtony78 0:e2c2d9435339 6 * this stuff is worth it, you can buy me a beer in return
auxtony78 0:e2c2d9435339 7 * ----------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 8 */
auxtony78 0:e2c2d9435339 9
auxtony78 0:e2c2d9435339 10 #include "mbed.h"
auxtony78 0:e2c2d9435339 11
auxtony78 0:e2c2d9435339 12 Serial pc(USBTX,USBRX); //enable serial connection
auxtony78 0:e2c2d9435339 13
auxtony78 0:e2c2d9435339 14 InterruptIn dcfPinIn (PTD7); //connection to non inverting output of dcf module
auxtony78 0:e2c2d9435339 15
auxtony78 0:e2c2d9435339 16 Timer r,f; //create two timers
auxtony78 0:e2c2d9435339 17
auxtony78 0:e2c2d9435339 18 int count; //count the received info per minutes
auxtony78 0:e2c2d9435339 19
auxtony78 0:e2c2d9435339 20 int dcf_array[60]; //array of the dcf77 info
auxtony78 0:e2c2d9435339 21
auxtony78 0:e2c2d9435339 22 // boolean for Rising and falling edge
auxtony78 0:e2c2d9435339 23 volatile bool bRise = false;
auxtony78 0:e2c2d9435339 24 volatile bool bFall = false;
auxtony78 0:e2c2d9435339 25
auxtony78 0:e2c2d9435339 26 // when we got a rising edge...
auxtony78 0:e2c2d9435339 27 void riseInt()
auxtony78 0:e2c2d9435339 28 {
auxtony78 0:e2c2d9435339 29 f.stop();
auxtony78 0:e2c2d9435339 30 r.reset();
auxtony78 0:e2c2d9435339 31 r.start();
auxtony78 0:e2c2d9435339 32 bFall = true;
auxtony78 0:e2c2d9435339 33 }
auxtony78 0:e2c2d9435339 34
auxtony78 0:e2c2d9435339 35 // when we got a falling edge...
auxtony78 0:e2c2d9435339 36 void fallInt()
auxtony78 0:e2c2d9435339 37 {
auxtony78 0:e2c2d9435339 38 r.stop();
auxtony78 0:e2c2d9435339 39 f.reset();
auxtony78 0:e2c2d9435339 40 f.start();
auxtony78 0:e2c2d9435339 41 bRise = true;
auxtony78 0:e2c2d9435339 42 }
auxtony78 0:e2c2d9435339 43
auxtony78 0:e2c2d9435339 44 // simple dcf77 information print function.
auxtony78 0:e2c2d9435339 45 void print_time()
auxtony78 0:e2c2d9435339 46 {
auxtony78 0:e2c2d9435339 47 int hour, min, day, month, year;
auxtony78 0:e2c2d9435339 48
auxtony78 0:e2c2d9435339 49 //calculate hour--------------------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 50 hour = dcf_array[34] * 20 + dcf_array[33] * 10 + dcf_array[32] * 8 + dcf_array[31] * 4 + dcf_array[30] * 2 + dcf_array[29] * 1;
auxtony78 0:e2c2d9435339 51
auxtony78 0:e2c2d9435339 52 //calculate minutes------------------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 53 min = dcf_array[24] * 8 + dcf_array[23] * 4 + dcf_array[22] * 2 + dcf_array[21] * 1 + dcf_array[27] * 40 + dcf_array[26] * 20 +dcf_array[25] * 10;
auxtony78 0:e2c2d9435339 54
auxtony78 0:e2c2d9435339 55 //calculate day----------------------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 56 day = dcf_array[39] * 8 + dcf_array[38] * 4 + dcf_array[37] * 2 + dcf_array[36] * 1 + dcf_array[41] * 20 + dcf_array[40] * 10;
auxtony78 0:e2c2d9435339 57
auxtony78 0:e2c2d9435339 58 //calculate month--------------------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 59 month = dcf_array[49] * 10 + dcf_array[48] * 8 + dcf_array[47] * 4 + dcf_array[46] * 2 + dcf_array[45] * 1;
auxtony78 0:e2c2d9435339 60
auxtony78 0:e2c2d9435339 61 //calculate year---------------------------------------------------------------------------------------
auxtony78 0:e2c2d9435339 62 year = dcf_array[57] * 80 + dcf_array[56] * 40 + dcf_array[55] * 20 + dcf_array[54] * 10 + dcf_array[53] * 8 +dcf_array[52] * 4 + dcf_array[51] * 2 + dcf_array[50] * 1;
auxtony78 0:e2c2d9435339 63
auxtony78 0:e2c2d9435339 64 pc.printf("%dh%dmin %d/%d/%d \r\n", hour, min, day, month, year);
auxtony78 0:e2c2d9435339 65 }
auxtony78 0:e2c2d9435339 66
auxtony78 0:e2c2d9435339 67 // main //
auxtony78 0:e2c2d9435339 68 int main()
auxtony78 0:e2c2d9435339 69 {
auxtony78 0:e2c2d9435339 70 // attach two functions:
auxtony78 0:e2c2d9435339 71 // 1 for the falling edge
auxtony78 0:e2c2d9435339 72 // 1 for the rising edge
auxtony78 0:e2c2d9435339 73 dcfPinIn.rise(&riseInt);
auxtony78 0:e2c2d9435339 74 dcfPinIn.fall(&fallInt);
auxtony78 0:e2c2d9435339 75
auxtony78 0:e2c2d9435339 76 // endless loop
auxtony78 0:e2c2d9435339 77 while(1)
auxtony78 0:e2c2d9435339 78 {
auxtony78 0:e2c2d9435339 79 ///////////////////////////
auxtony78 0:e2c2d9435339 80 if( bFall == true )
auxtony78 0:e2c2d9435339 81 {
auxtony78 0:e2c2d9435339 82 // did we pass the reset time ?
auxtony78 0:e2c2d9435339 83 if( f.read_ms() > 950 )
auxtony78 0:e2c2d9435339 84 {
auxtony78 0:e2c2d9435339 85 //pc.printf("reset");
auxtony78 0:e2c2d9435339 86 print_time();
auxtony78 0:e2c2d9435339 87 count = 0;
auxtony78 0:e2c2d9435339 88 }
auxtony78 0:e2c2d9435339 89 else
auxtony78 0:e2c2d9435339 90 {
auxtony78 0:e2c2d9435339 91 pc.printf(".");
auxtony78 0:e2c2d9435339 92 }
auxtony78 0:e2c2d9435339 93
auxtony78 0:e2c2d9435339 94 bFall = false;
auxtony78 0:e2c2d9435339 95 } //if bFall
auxtony78 0:e2c2d9435339 96
auxtony78 0:e2c2d9435339 97 //////////////////////////
auxtony78 0:e2c2d9435339 98 if( bRise == true )
auxtony78 0:e2c2d9435339 99 {
auxtony78 0:e2c2d9435339 100 // 100ms = '0' and 200ms = '1'
auxtony78 0:e2c2d9435339 101 if( r.read_ms() > 150 )
auxtony78 0:e2c2d9435339 102 {
auxtony78 0:e2c2d9435339 103 //pc.printf("1");
auxtony78 0:e2c2d9435339 104 dcf_array[count] = 1;
auxtony78 0:e2c2d9435339 105 }
auxtony78 0:e2c2d9435339 106 else
auxtony78 0:e2c2d9435339 107 {
auxtony78 0:e2c2d9435339 108 //pc.printf("0");
auxtony78 0:e2c2d9435339 109 dcf_array[count] = 0;
auxtony78 0:e2c2d9435339 110 }
auxtony78 0:e2c2d9435339 111
auxtony78 0:e2c2d9435339 112 count ++;
auxtony78 0:e2c2d9435339 113 bRise = false;
auxtony78 0:e2c2d9435339 114 }//if bRise
auxtony78 0:e2c2d9435339 115
auxtony78 0:e2c2d9435339 116 } // while
auxtony78 0:e2c2d9435339 117 } // main
auxtony78 0:e2c2d9435339 118
auxtony78 0:e2c2d9435339 119