add button stuff and timer stuff

src/gpio.h

@@ -24,9 +24,16 @@ typedef enum {
   HIGH,
 } tPinState;
 
+typedef enum {
+  PIN_OUT,
+  PIN_IN,
+  PIN_IN_PULLUP
+} tPinDirection;
+
 typedef struct {
   tPort portId;
   uint16_t bit;
+  tPinDirection direction;
   tPinState defaultOut;
 } tPinCfg;
 
@@ -42,13 +49,13 @@ typedef enum {
   SEG_G,
   DIGIT_0,
   DIGIT_1,
-  TESTPIN1,
-  TESTPIN2,
+  BUTTON_1,
   PINS_END
 } tPin;
 
 void gpioInitPins();
 void gpioSetPin(tPin p, tPinState v);
+tPinState gpioGetPin(tPin p);