rtc_tst.cpp

00001 #include "rtc_tst.h"
00002 #include "string.h"
00003 
00004 SPI spi(PTD6, PTD7, PTD5); // mosi, miso, sclk
00005 DigitalOut cs(D9);
00006 
00007 
00008 char* Getts()
00009     {
00010 
00011     // Setup the spi for 8 bit data, high steady state clock,
00012     // second edge capture, with a 1MHz clock rate
00013     spi.format(8,3);
00014     spi.frequency(1000000);
00015 
00016     cs = 0;
00017     spi.write(0x80);  // set write register to seconds
00018     spi.write(0x00);  // send value of zero
00019     
00020     //cs=1;
00021     //cs=0;
00022      spi.write(0x81);  
00023     spi.write(0x00);   //write reg to minutes
00024     
00025     //cs=1;
00026     //cs=0;
00027     
00028     spi.write(0x82);  
00029     spi.write(0x15);  //write reg to hours (00-23)
00030     
00031     spi.write(0x83);  
00032     spi.write(0x07);  //write reg to day (1-7)
00033     
00034     spi.write(0x84);  
00035     spi.write(0x20);  //write reg to date(01-31)
00036     
00037     spi.write(0x85);  
00038     spi.write(0x12);  //write reg to mnth(01-12)
00039     
00040     spi.write(0x86);  
00041     spi.write(0x12);  //write reg to year(00-99)
00042     
00043     cs=1;
00044     // Receive the contents of the seconds register
00045    
00046    
00047     
00048         
00049     cs=0;
00050     spi.write(0x00);                 // set read register to seconds
00051     int seconds = spi.write(0x00);   // read the value by sending dummy byte
00052     
00053     //cs=1;
00054     //cs=0;
00055     
00056     spi.write(0x01);
00057     int minutes =spi.write(0x01);
00058     
00059     //cs=1;
00060     //cs=0;
00061     
00062     spi.write(0x02);
00063     int hours =spi.write(0x01);
00064     
00065     spi.write(0x03);
00066     int day =spi.write(0x01);
00067     
00068     spi.write(0x04);
00069     int date =spi.write(0x01);
00070     
00071     spi.write(0x05);
00072     int month =spi.write(0x01);
00073     
00074     spi.write(0x06);
00075     int year =spi.write(0x01);
00076     
00077     //This cs=1 is to make the chipselect line high to "deselect" the slave in our case RTC
00078     cs = 1;
00079     
00080     //This printf function is to check the timestamp function in the terminal output
00081     printf("timestamp as  = %X : %X : %X : %X : %X : %X : %X\n\r", hours,minutes,seconds,day,date,month,year);
00082     
00083     
00084     printf("b4 returning tmpstmp is : %s\n",getname(year,month,date,day,hours,minutes,seconds));
00085     return(getname(year,month,date,day,hours,minutes,seconds));
00086     
00087     
00088     }
00089     
00090     
00091     
00092     
00093     
00094     
00095     char* getname(int year1,int month1,int date1,int day1,int hours1,int minutes1,int seconds1)
00096 {
00097     year1= hexint(year1);
00098     month1=hexint(month1);
00099     date1=hexint(date1);
00100     day1=hexint(day1);
00101     hours1=hexint(hours1);
00102     minutes1=hexint(minutes1);
00103     seconds1=hexint(seconds1);
00104     /*char y[3]=getstr(year);
00105     char m[3]=getstr(month);
00106     char dat[3]=getstr(date);
00107     char da[3]=getstr(day);
00108     char h[3]=getstr(hours);
00109     char mi[3]=getstr(minutes);
00110     char s[3]=getstr(seconds);*/
00111     char time[15];
00112     sprintf(time,"%d%d%d%d%d%d%d",year1,month1,date1,day1,hours1,minutes1,seconds1);
00113     return(time);
00114     
00115 }
00116  
00117 int hexint(int a)
00118 {
00119     a=(a/16)*10+(a%16);
00120     return a;
00121 }