Diff: main.cpp

Revision:

0:2cc234c395e2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 26 09:58:44 2017 +0000
@@ -0,0 +1,66 @@
+#include "mbed.h"
+
+DigitalOut myled(LED1);
+I2C myi2c(PTE0,PTE1);
+Serial pc(USBTX,USBRX);
+
+const int ds1307=0xD0;
+char data;
+
+
+int bcd2int(unsigned int bcd)
+{
+    int pos = sizeof(bcd) * 8;
+    int digit;
+    int val = 0;
+
+    do {
+        pos -= 4;
+        digit = (bcd >> pos) & 0xf;
+        val = val * 10 + digit;
+    } while (pos > 0);
+
+    return val;
+}
+
+
+
+
+
+int main()
+{
+    int p;
+    myi2c.frequency(100000);
+
+    myi2c.write(ds1307,0x00,1); // tell the ds1307 we want to talk to address
+    for(p=0; p<8; p++) {
+        myi2c.read(ds1307,&data,1); // read one byte into data
+
+        pc.printf("item: %d\t\tread:%d\t \n\r",p,(int)data);
+        wait(0.01);
+    }
+
+    pc.printf("\n==========\n\r\nStarting the clock now\n\r");
+    char cmd[2];
+    cmd[0]=0;
+    cmd[1]=0;
+    myi2c.write(ds1307,cmd,2); // tell the ds1307 we want to talk to address 00
+
+
+    while(1) {
+        myled = 1;
+        wait(0.8);
+        myled = 0;
+
+        myi2c.write(ds1307,0x00,1); // tell the ds1307 we want to talk to address 0
+        for(p=0; p<8; p++) {
+            myi2c.read(ds1307,&data,1); // read one byte into data
+
+            pc.printf("item: %d\t\tread:%d\t VAL:%d \n\r",p,(int)data,bcd2int(data));
+            wait(0.01);
+        }
+        wait(5);
+        pc.printf("\n==========================\n\r");
+    }
+}
+