Diff: main.cpp

Revision:

0:a07e5a4c94bb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 20 12:17:15 2014 +0000
@@ -0,0 +1,101 @@
+#include "mbed.h"
+
+SPI spi(PTD6, PTD7, PTD5); // mosi, miso, sclk
+DigitalOut cs(D9);
+
+
+int main() 
+{
+ 
+ 
+ 
+   // Setup the spi for 8 bit data, high steady state clock,
+    // second edge capture, with a 1MHz clock rate
+    spi.format(8,3);
+    spi.frequency(1000000);
+
+    cs = 0;
+    spi.write(0x80);  // set write register to seconds
+    spi.write(0x01);  // send value of zero
+    
+    //cs=1;
+    //cs=0;
+     spi.write(0x81);  
+    spi.write(0x58);   //write reg to minutes
+    
+    //cs=1;
+    //cs=0;
+    
+    spi.write(0x82);  
+    spi.write(0x01);  //write reg to hours (00-23)
+    
+    spi.write(0x83);  
+    spi.write(0x01);  //write reg to day (1-7)
+    
+    spi.write(0x84);  
+    spi.write(0x01);  //write reg to date(01-31)
+    
+    spi.write(0x85);  
+    spi.write(0x01);  //write reg to mnth(01-12)
+    
+    spi.write(0x86);  
+    spi.write(0x01);  //write reg to year(00-99)
+
+    cs=1;
+    // Receive the contents of the seconds register
+   
+   for(int i=0;i<1000000;i++){
+    
+        
+    cs=0;
+    spi.write(0x00);                 // set read register to seconds
+    int seconds = spi.write(0x00);   // read the value by sending dummy byte
+    
+    cs=1;
+    cs=0;
+    
+    spi.write(0x01);
+    int minutes =spi.write(0x01);
+    
+    cs=1;
+    cs=0;
+    
+    spi.write(0x02);
+    int hours =spi.write(0x01);
+    
+    cs=1;
+    cs=0;
+    
+    spi.write(0x03);
+    int day =spi.write(0x01);
+    
+    cs=1;
+    cs=0;
+    
+    spi.write(0x04);
+    int date =spi.write(0x01);
+    
+    cs=1;
+    cs=0;
+    
+    spi.write(0x05);
+    int mnth =spi.write(0x01);
+    
+    cs=1;
+    cs=0;
+    
+    spi.write(0x06);
+    int year =spi.write(0x01);
+    
+    //This cs=1 is to make the chipselect line high to "deselect" the slave in our case RTC
+    cs = 1;
+    
+    //This printf function is to check the timestamp function in the terminal output
+    printf("timestamp as  = %X : %X : %X : %X : %X : %X : %X\n\r", year,mnth,date,day,hours,minutes,seconds);
+    }
+    
+    
+    
+    return 0;
+    
+    }
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