Diff: Multiplexer.cpp

Revision:

0:88f8e80dc5fd

Child:

4:cc896bb62196

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Multiplexer.cpp	Wed Mar 19 10:29:32 2014 +0000
@@ -0,0 +1,95 @@
+#include "Multiplexer.h"
+#include "mbed.h"
+
+DigitalOut sync(p5);
+DigitalOut sclk_mux(p6);
+DigitalOut din(p7);
+
+#define ENABLE 7
+#define CSA 6
+#define CSB 5
+#define UNUSED_BIT 4
+#define A3 3
+#define A2 2
+#define A1 1
+#define A0 0
+
+//Constructor & Destructor
+Multiplexer::Multiplexer(void)
+{
+    sclk_mux = 0;
+    sync = 1;
+    din = 0;
+
+    enable = false;
+    channel = 0;
+}
+Multiplexer::~Multiplexer(void)
+{
+}
+
+//GETTERS
+bool Multiplexer::Enabled(void)
+{
+    return(enable);
+}
+int Multiplexer::getChannel(void)
+{
+    return(channel);
+}
+
+//SETTERS
+void Multiplexer::Enable(void)
+{
+    enable = true;
+    Update();
+}
+void Multiplexer::Disable(void)
+{
+    enable = false;
+    Update();
+}
+void Multiplexer::setChannel(int newChannel)
+{
+    if(newChannel>=0 && newChannel<16)
+    {
+        channel = newChannel;
+        Update();
+    }
+}
+
+//updater
+void Multiplexer::Update(void)
+{
+
+    //onze data opmaken
+    char data = 0;
+    data |= !enable << ENABLE;
+    data |= 0 << CSA;
+    data |= 0 << CSB;
+    data |= 1 << UNUSED_BIT;
+    data |= channel;
+
+    //Timing diagrama uitvoeren
+    sclk_mux = 1;
+    wait_us(1);
+
+    sclk_mux = 0;
+    wait_us(1);
+
+    sync = 0;
+    for (int i = 7; i >= 0; i--)
+    {
+        sclk_mux = 1;
+        din = (data >> i) & 1;
+        wait_us(1);
+
+        sclk_mux = 0; 
+        wait_us(1);
+    }
+
+    //terug standaard waarden
+    sclk_mux = 0;
+    sync = 1;
+    din = 0;
+}
\ No newline at end of file