Diff: CD74HC165E.cpp

Revision:

0:5ec20ee3f455

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CD74HC165E.cpp	Wed Mar 07 21:11:16 2018 +0000
@@ -0,0 +1,42 @@
+#include "CD74HC165E.h"
+
+#define HIGH 1
+#define LOW  0
+
+int WaitingTime=1;
+//CD74HC165E
+//PL pin 1
+//CP pin 2
+//CE pin 15
+//Q7 pin 9
+
+
+
+CD74HC165E::CD74HC165E (PinName PL, PinName CP, PinName Q7) : _PL(PL), _CP(CP), _Q7(Q7)
+{
+_PL = LOW;
+_CP = LOW;
+//_Q7 no perchè è una uscita e non ingresso
+}
+
+bool* CD74HC165E::Read()    {
+//achieving data D0-D7
+_CP = LOW;
+wait_us(WaitingTime); 
+_PL = LOW; 
+wait_us(WaitingTime*5);   // 5 microseconds to be sure to achieve all data D0-D7
+_PL = HIGH; 
+
+//store data in array
+static bool myDataIn[8] = {1,0,1,0,1,0,1,0}; 
+wait_us(WaitingTime);  
+for (int i=7; i>=0; i--) {
+    _CP = LOW;
+    wait_us(WaitingTime);
+    myDataIn[i] = _Q7;      
+    _CP = HIGH;
+    wait_us(WaitingTime);      
+    }
+    
+return myDataIn;
+}
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