From 23b29a81a9df8768ca88a8015f02fbb34f5328cb Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Mon, 2 Jun 2014 00:21:12 +0000
Subject: GPIO outputs are now MIDI controlable


diff --git a/software/rhmixxx/gpio.c b/software/rhmixxx/gpio.c
index 6edf376..bdc1378 100644
--- a/software/rhmixxx/gpio.c
+++ b/software/rhmixxx/gpio.c
@@ -29,10 +29,28 @@
 void gpio_init(void)
 {
   GPIO_DDR = 0x0F;
-  GPIO_PORT = 0xFA;
+  GPIO_PORT = 0xF0;
+}
+
+void gpio_out_on(uint8_t num)
+{
+  if(num < 4)
+    GPIO_PORT |= (1 << num);
+}
+
+void gpio_out_off(uint8_t num)
+{
+  if(num < 4)
+    GPIO_PORT &= ~(1 << num);
+}
+
+void gpio_out_toggle(uint8_t num)
+{
+  if(num < 4)
+    GPIO_PORT ^= (1 << num);
 }
 
 void gpio_task(void)
 {
-  GPIO_PORT ^= 0x0F;
+  // TODO generate events on change of GPI
 }
diff --git a/software/rhmixxx/gpio.h b/software/rhmixxx/gpio.h
index 58a3fe4..3c27d78 100644
--- a/software/rhmixxx/gpio.h
+++ b/software/rhmixxx/gpio.h
@@ -23,6 +23,11 @@
 #define RHMIXXX_gpio_h_INCLUDED
 
 void gpio_init(void);
+
+void gpio_out_on(uint8_t num);
+void gpio_out_off(uint8_t num);
+void gpio_out_toggle(uint8_t num);
+
 void gpio_task(void);
 
 #endif
diff --git a/software/rhmixxx/rhmixxx.c b/software/rhmixxx/rhmixxx.c
index 106c64a..d5ac080 100644
--- a/software/rhmixxx/rhmixxx.c
+++ b/software/rhmixxx/rhmixxx.c
@@ -83,7 +83,7 @@ static void process_incoming_midi(void)
     uint8_t cmd = ReceivedMIDIEvent.Data1 & 0xF0;
     uint8_t note = ReceivedMIDIEvent.Data2;
     uint8_t value = ReceivedMIDIEvent.Data3 & 0x7F;
-    if(note < 16 || note == 0x7F) { // TODO: hardcoded value
+    if(note < 16 || note == 0x7F) { // KEYPAD
       if(cmd == MIDI_COMMAND_NOTE_ON) {
         if(value <= 2) {
           switch(value) {
@@ -95,6 +95,14 @@ static void process_incoming_midi(void)
           keypad_led_blink(note, value);
         }
       }
+    } else if(note >= 64 && note <= 68) { // GPIO
+      if(cmd == MIDI_COMMAND_NOTE_ON) {
+        switch(value) {
+          case 0: gpio_out_off(note - 64); break;
+          case 1: gpio_out_on(note - 64); break;
+          case 2: gpio_out_toggle(note - 64); break;
+        }
+      }
     }
   }
 }
-- 
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