Diff: I2C/myi2c.cpp

Revision:

0:84a4a0aa3ea6

diff -r 000000000000 -r 84a4a0aa3ea6 I2C/myi2c.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2C/myi2c.cpp	Sat May 06 20:12:01 2017 +0000
@@ -0,0 +1,54 @@
+#include "myi2c.h"
+
+PCF8563::PCF8563(PinName sda, PinName scl) : i2c (sda, scl)
+{
+    i2c.frequency(PCF8563_FREQ);        //set the frequency
+}
+/*
+ * read function from the TRC
+ * read a value and return it
+ */
+uint8_t PCF8563::read(int i2c_r, int address)
+{
+    uint8_t value; //temp 8bit
+    i2c.start();    //start
+    i2c.write(i2c_r);  //write address
+    i2c.write(address);
+    i2c.start();    //restart
+    i2c.write(address);  //read address
+    value = i2c.read(0);
+    i2c.stop();
+
+    return value;   //returns var value of the method
+}
+uint8_t PCF8563::read(int i2c_w, int i2c_r, int address)
+{
+    uint8_t value; //temp 8bit
+    i2c.start();    //start
+    i2c.write(i2c_w);  //write address
+    i2c.write(address);
+    i2c.start();    //restart
+    i2c.write(i2c_r);  //read address
+    value = i2c.read(0);
+    i2c.stop();
+    return value;
+}
+/* firtly you write the address from the rtc
+ * secondly the register address
+ * last but not leat your value
+ */
+void PCF8563::write(int i2c_w, int address, int value)
+{
+    i2c.start();    //start
+    i2c.write(i2c_w);  //i2c write address
+    i2c.write(address);
+    i2c.write(value);
+    i2c.stop(); //stop
+}
+/*
+ * Binary Coded Decimal converter into decimal
+ */
+uint8_t PCF8563::bcdToDec(uint8_t val)
+{
+    return (10*((val>>4)& 0x0F)+(val & 0x0F));      //convert from bcd to dec
+}