Revision 2:b565b6a8f612, committed 2019-05-07

Comitter:

mwthewsey

Date:

Tue May 07 13:53:06 2019 +0000

Parent:

1:9cc13bd590df

Commit message:

shift regs working

Changed in this revision

diff -r 9cc13bd590df -r b565b6a8f612 ShiftReg.cpp
--- a/ShiftReg.cpp	Tue May 07 13:19:27 2019 +0000
+++ b/ShiftReg.cpp	Tue May 07 13:53:06 2019 +0000
@@ -1,7 +1,36 @@
 #include "mbed.h"
 #include "ShiftReg.h"
 
-ShiftReg::ShiftReg(PinName data, PinName store, PinName clock ): _ds(data), _st(store), _sh(clock){}//Constructor
+ShiftReg::ShiftReg(PinName data, PinName store, PinName clock, PinName enable ): _ds(data), _st(store), _sh(clock), _en(enable)//Constructor
+{
+    _en = 1;   
+}
+void ShiftReg::Write (uint16_t  data)
+{
+    uint16_t mask; 
+    mask = 0x8000;
+    for (uint8_t i = 0; i < 16; i++)
+    {       
+        if (data & mask)
+        {
+            _ds = 1;
+        }
+        else
+        {
+            _ds = 0;
+        }
+    
+         mask = mask >> 1;
+        
+        _sh = 0;
+        _sh = 1;
+    }
+    //Latch
+    _st = 1;
+    _st = 0;
+    //Latch
+    _en = 0;
+}
 void ShiftReg::ShiftByte (uint16_t  data, BitOrd  ord )
 {
     uint16_t mask;
@@ -36,6 +65,7 @@
         _sh = 0;
         _sh = 1;
     }
+    _en = 0;
 }
 void ShiftReg::ShiftBit(int8_t  data)
 {

diff -r 9cc13bd590df -r b565b6a8f612 ShiftReg.h
--- a/ShiftReg.h	Tue May 07 13:19:27 2019 +0000
+++ b/ShiftReg.h	Tue May 07 13:53:06 2019 +0000
@@ -71,7 +71,7 @@
      * @param store    Pin to store register
      * @param clock    Pin to shift into register
      */
-    ShiftReg(PinName data, PinName store, PinName clock);//Constructor
+    ShiftReg(PinName data, PinName store, PinName clock, PinName enable);//Constructor
 
     /** Shift out 8-bit data via the serial pin
      *
@@ -79,7 +79,7 @@
      * @param order   Bit order to shift out data. Default is MSBFirst
      */
     void ShiftByte(uint16_t  data,BitOrd  ord    = MSBFirst);//Shifting the data member function
-    
+    void Write(uint16_t  data);//Writing data in it
     /** Shift out 1-bit data via the serial pin
      *
      * @param data    Data to be shifted out via the serial pin
@@ -94,6 +94,7 @@
     DigitalOut _ds;          // Serial in
     DigitalOut _st;          // store register or latch
     DigitalOut _sh;          // shift register
+    DigitalOut _en;          // shift enable
     BitOrd     _ord;         // Bit order to shift out data
 };