Diff: part4.cpp

Revision:

5:d1ad3a964858

diff -r 6a7029bf4e1c -r d1ad3a964858 part4.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/part4.cpp	Wed Jan 15 19:58:39 2020 +0000
@@ -0,0 +1,73 @@
+#include "mbed.h"
+ 
+BusOut mbedleds(LED1,LED2,LED3,LED4);
+//BusOut/In is faster than multiple DigitalOut/Ins
+ 
+class Nav_Switch
+{
+public:
+    Nav_Switch(PinName up,PinName down,PinName left,PinName right,PinName fire);
+    int read();
+//boolean functions to test each switch
+    bool up();
+    bool down();
+    bool left();
+    bool right();
+    bool fire();
+//automatic read on RHS
+    operator int ();
+//index to any switch array style
+    bool operator[](int index) {
+        return _pins[index];
+    };
+private:
+    BusIn _pins;
+ 
+};
+Nav_Switch::Nav_Switch (PinName up,PinName down,PinName left,PinName right,PinName fire):
+    _pins(up, down, left, right, fire)
+{
+    _pins.mode(PullUp); //needed if pullups not on board or a bare nav switch is used - delete otherwise
+    wait(0.001); //delays just a bit for pullups to pull inputs high
+}
+inline bool Nav_Switch::up()
+{
+    return !(_pins[0]);
+}
+inline bool Nav_Switch::down()
+{
+    return !(_pins[1]);
+}
+inline bool Nav_Switch::left()
+{
+    return !(_pins[2]);
+}
+inline bool Nav_Switch::right()
+{
+    return !(_pins[3]);
+}
+inline bool Nav_Switch::fire()
+{
+    return !(_pins[4]);
+}
+inline int Nav_Switch::read()
+{
+    return _pins.read();
+}
+inline Nav_Switch::operator int ()
+{
+    return _pins.read();
+}
+ 
+Nav_Switch myNav( p9, p6, p7, p5, p8); //pin order on Sparkfun breakout
+ 
+int main()
+{
+    while(1) {
+        //with pullups a button hit is a "0" - "~" inverts data to leds
+        mbedleds = ~(myNav & 0x0F); //update leds with nav switch direction inputs
+        if(myNav.fire()) mbedleds = 0x0F; //special all leds on case for fire (center button)
+        //or use - if(myNav[4]==0) mbedleds = 0x0F; //can index a switch bit like this
+        wait(0.02);
+    }
+}
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