Update documentation.

Joystick.h

@@ -33,14 +33,19 @@ class Joystick {
     void Init();
     void Update();
 
-    // Add a button to the joystick.
-    // Button types are documented in the ButtonType enum.
-    // If `pullup` is true, your button should connect the pin to ground. (also be sure that your board supports INPUT_PULLUP on that pin)
-    // If `pullup` is false, your button should connect the pin to VCC.
-    // Setting `analogOnly` to true indicates your button *must* be read with analog code, such as the A6 and A7 pins
-    //   on the Arduino Nano.
+    // Use these functions to add a button to the joystick.
+    // Button types are documented in the ButtonType enum. See Button.h for details.
+    // If 'pullup' is true, your button should connect the pin to ground. (also be sure that your board supports INPUT_PULLUP on that pin)
+    // If 'pullup' is false, your button should connect the pin to VCC.
+
+    // Add a button connected directly to a pin on the microcontroller.
     void AddButton(uint8_t pin, ButtonType type, bool pullup=true);
+
+    // Add a button connected to a channel on a Multiplexer.
+    // FIXME: This doesn't currently work!
     void AddMuxButton(uint8_t channel, Mux* mux, ButtonType type, bool pullup=true);
+
+    // Add a button connected to a scan matrix.
     void AddMatrixButton(uint8_t row, uint8_t col, Matrix* matrix, ButtonType type, bool pullup=true);
   
     // Add a rotary encoder. ENCODER button types allow you to treat an encoder as a momentary button or an axis (TODO)

Reader.cpp

@@ -19,7 +19,7 @@ uint8_t Reader::getMode(bool pullup) {
 
 DirectReader::DirectReader(uint8_t pin, bool inverted) : Reader(inverted) {
   uint8_t mode = getMode(inverted);
-  this->bouncer.attach(pin);
+  this->bouncer.attach(pin, mode);
 }
 
 bool DirectReader::Update() {

Readme.md

@@ -12,18 +12,22 @@ This is a library that builds and sends USB HID Joystick reports, making it easy
     arduino-cli lib install "Analog-Digital Multiplexers"
 2. Put the arduino-joystick directory into your Arduino libraries directory.
 
+## Compiling and running the example code via SimulIDE
+1. Run `make` from the `example` directory.
+2. Load `example.simu` in SimulIDE.
+3. Right-click on the Arduino component, and click "load firmware". Select the `.hex` file created in the `example/` directory.
+4. Click the red `Power Circuit` icon at the top of the SimulIDE window.
+
 ## Usage
-1. In your arduino sketch, add the includes:
+1. In your arduino sketch, add the include:
     #include <Joystick.h>
 2. Create a Joystick object:
     Joystick joystick(true);
-3. Add buttons and axes in setup() with Joystick::AddButton(), and call Joystick::Update() in loop().
+3. Add buttons and axes in `setup()` with the `Add*` functions from `Joystick.h`. Call `joystick.Update()` in your `loop()` function. Also call `joystick.Init()` during `setup()`.
 4. Upload the sketch, connect to the serial monitor (at 115200 baud) and test the buttons.
 5. Set the joystick's `debug` parameter to `false` and re-upload the sketch. The arduino will NOT work in joystick mode with debug set to `true`!
 6. Flash the `arduino-big-joystick` firmware onto the USB Controller.
 
-### Advanced usage: multiplexers
+### Advanced usage: multiplexers, matrices
 
-If you need more buttons than your board has pins, multiplexers (such as [this one](https://www.sparkfun.com/products/13906) and [this one](https://www.sparkfun.com/products/9056)) are a popular solution. This library supports multiplexers! To use them, you need to do some extra work.
-
-Call the `AddMux()` method and pass it the pins the multiplexer is connected to. You'll need to `#include <Mux.h>` to access `admux::Pinset`. `AddMux()` will return a `mux_id` for subsequently passing to `AddButton()`. The `pin` parameter for all multiplexed buttons should be the same as the multiplexer's `signal_pin`.
+If you need more buttons than your board has pins, this library supports keyboard-style scan matrices as well as multiplexers. **(FIXME: multiplexers aren't working yet)** See the example sketch in the `example/` directory for usage details. Note that, for matrices, the *rows* are the inputs that will be read, and the *columns* are the outputs that will sink the current. Current should flow (via diodes) from the rows to the columns. See the `example.simu` SimulIDE file for an example circuit.

example/example.ino

@@ -18,6 +18,7 @@ using namespace admux;
 #define BTN2 5
 #define BTN3 6
 #define BTN4 7
+#define BTN5 A0
 
 // pins 8-13 are attached to a 3x3 scanning input matrix. Pins 8-10 are the row pins, 11-13 are the column pins.
 #define MATRIX1 8,11
@@ -68,6 +69,9 @@ void setup() {
   // BUTTON_LATCHED_MOMENTARY lets you turn a momentary pushbutton into a toggle switch.
   // One press will "press and hold" the button. The next press releases the button.
   js.AddButton(BTN4, BUTTON_LATCHED_MOMENTARY);
+
+  // This is a standard PASSTHRU button. It simply mirrors the actual state of the physical button.
+  js.AddButton(BTN5, BUTTON_PASSTHRU);
   
   // One way to get more room for inputs is to use a scan matrix.
   // See http://blog.komar.be/how-to-make-a-keyboard-the-matrix/ for a very detailed discussion of how these work.