Revision 0:c9c5aaba2891, committed 2014-01-08

Comitter:

kuldipmaharjan

Date:

Wed Jan 08 00:31:09 2014 +0000

Commit message:

This code reads time value from external RTC using I2C protocol

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jan 08 00:31:09 2014 +0000
@@ -0,0 +1,57 @@
+//Author: Kuldip Maharjan
+//Email : kuldipmaharjan@gmail.com
+//Anyone can use this code if it helps in their projects or 
+//for learning programing in mbed besides for commercial purposes
+
+//This code reads time value from external RTC using I2C protocol
+
+#include "mbed.h"
+I2C    i2c( p28, p27 );        // sda, scl
+Serial pc(USBTX, USBRX); // tx, rx
+
+int main() {
+    char v[10];
+    char cmd[1];
+    char data[10];
+    char data2[2];
+    pc.baud(115200);
+    i2c.frequency(100000);
+    
+    cmd[0] = 0x00;
+   // cmd[1] = 0x05;
+   //set the min data[0] =0, data[1] = 1
+   //set the hr data[0] =1, data[1] = 1
+   //
+   /*
+        data[0] = 0x0;  // MSB address
+        data[1] = 0x00; // sec
+        data[2] = 0x19; // min
+        data[3] = 0x14; // hr
+        data[4] = 0x06; // day
+        data[5] = 0x07; // date
+        data[6] = 0x12; // month
+        data[7] = 0x12; // year
+           
+        if(i2c.write(0xD0, data, 8)) {
+            error("Write failed\n");
+        }
+        while(i2c.write(0xD0, NULL, 0)); // wait to complete
+   
+  */
+   
+    while(1) {
+   
+        i2c.write( 0xD0, cmd , 1 );
+        
+        i2c.read( 0xD0, v , 7 );
+       
+        wait(1);
+        pc.printf("\n\r %d%d sec  %d%d min",v[0]>>4, v[0]&0x0F,v[1]>>4, v[1]&0x0F);
+        pc.printf("\n\r %d%d hr  %d day",(v[2]>>4), v[2]&0x0F, v[3]&0x07);
+        pc.printf("\n\r %d%d date  %d%d month  %d%d year",v[4]>>4, v[4]&0x0F,v[5]>>4, v[5]&0x0F,v[6]>>4,v[6]&0x0F);
+        
+        //pc.printf("\r %d/%d/%d %d day %d hrs %d min %d sec\n", v[5]+6,v[4]+2,v[6]+2012,v[3],v[2],v[1],v[0]);
+        //pc.printf("v[1] = %d \t ", v[1]);
+       
+     }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Jan 08 00:31:09 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/b60934f96c0c
\ No newline at end of file