From 6d858fbbc63b96fec3fcdb6bb009cabed36c4b11 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Sun, 1 Jun 2014 20:15:48 +0000
Subject: added support for blinking


diff --git a/software/rhmixxx/keypad.c b/software/rhmixxx/keypad.c
index 7a58ad0..6bdb01f 100644
--- a/software/rhmixxx/keypad.c
+++ b/software/rhmixxx/keypad.c
@@ -38,6 +38,11 @@ static struct {
   int16_t lp_cnt;
 } keypad_state[KEYPAD_NUM_KEYS];
 
+static struct {
+  uint16_t delay;
+  uint16_t cnt;
+} led_blink_state[KEYPAD_NUM_KEYS];
+
 void keypad_init(void)
 {
   KEYPAD_DDR = 0x00;
@@ -46,6 +51,9 @@ void keypad_init(void)
   for(i = 0; i < KEYPAD_NUM_KEYS; ++i) {
     keypad_state[i].last_sent = 0;
     keypad_state[i].lp_cnt = 0;
+
+    led_blink_state[i].delay = 0;
+    led_blink_state[i].cnt = 0;
   }
 
   DDRC = 0xFF;
@@ -78,6 +86,7 @@ void keypad_led_on(uint8_t led)
     case 15: PORTD |= (1 << (led - 12 + 4)); break;
     case 127: PORTC = 0xFF; PORTB |= 0xF0; PORTD |= 0xF0; break;
   }
+  keypad_led_blink(led, 0);
 }
 
 void keypad_led_off(uint8_t led)
@@ -101,6 +110,7 @@ void keypad_led_off(uint8_t led)
     case 15: PORTD &= ~(1 << (led - 12 + 4)); break;
     case 127: PORTC = 0x00; PORTB &= 0x0F; PORTD &= 0x0F; break;
   }
+  keypad_led_blink(led, 0);
 }
 
 void keypad_led_toggle(uint8_t led)
@@ -126,7 +136,21 @@ void keypad_led_toggle(uint8_t led)
   }
 }
 
-static void keypad_key_lowpass(uint8_t key_idx, uint8_t current_state)
+void keypad_led_blink(uint8_t led, uint8_t value)
+{
+  if(led < KEYPAD_NUM_KEYS) {
+    led_blink_state[led].delay = value * 64;
+    led_blink_state[led].cnt = 0;
+  } else {
+    uint8_t i;
+    for(i = 0; i < KEYPAD_NUM_KEYS; ++i) {
+      led_blink_state[i].delay = value * 64;
+      led_blink_state[i].cnt = 0;
+    }
+  }
+}
+
+static inline void keypad_key_lowpass(uint8_t key_idx, uint8_t current_state)
 {
   keypad_state[key_idx].lp_cnt += current_state ? -1 : +1;
   if(keypad_state[key_idx].lp_cnt <= 0 ||
@@ -146,6 +170,16 @@ static void keypad_key_lowpass(uint8_t key_idx, uint8_t current_state)
   }
 }
 
+static inline void keypad_led_blinking(uint8_t key_idx)
+{
+  if(led_blink_state[key_idx].delay > 1) {
+    if(++led_blink_state[key_idx].cnt >= led_blink_state[key_idx].delay) {
+      keypad_led_toggle(key_idx);
+      led_blink_state[key_idx].cnt = 0;
+    }
+  }
+}
+
 void keypad_task(void)
 {
   uint8_t col, row;
@@ -159,6 +193,8 @@ void keypad_task(void)
 
       uint8_t current_state = KEYPAD_PIN & (1 << row);
       keypad_key_lowpass(key_idx, current_state);
+
+      keypad_led_blinking(key_idx);
     }
   }
   KEYPAD_DDR = 0x00;
diff --git a/software/rhmixxx/keypad.h b/software/rhmixxx/keypad.h
index efd8a87..92c4188 100644
--- a/software/rhmixxx/keypad.h
+++ b/software/rhmixxx/keypad.h
@@ -24,9 +24,10 @@
 
 void keypad_init(void);
 
-void keypad_led_on(uint8_t leds);
-void keypad_led_off(uint8_t leds);
-void keypad_led_toggle(uint8_t leds);
+void keypad_led_on(uint8_t led);
+void keypad_led_off(uint8_t led);
+void keypad_led_toggle(uint8_t led);
+void keypad_led_blink(uint8_t led, uint8_t value);
 
 void keypad_task(void);
 
diff --git a/software/rhmixxx/rhmixxx.c b/software/rhmixxx/rhmixxx.c
index 1a10a03..4e591d6 100644
--- a/software/rhmixxx/rhmixxx.c
+++ b/software/rhmixxx/rhmixxx.c
@@ -84,10 +84,14 @@ static void process_incoming_midi(void)
     uint8_t value = ReceivedMIDIEvent.Data3 & 0x7F;
     if(note < 16 || note == 0x7F) { // TODO: hardcoded value
       if(cmd == MIDI_COMMAND_NOTE_ON) {
-        switch(value) {
-          case 0: keypad_led_off(note); break;
-          case 1: keypad_led_on(note); break;
-          case 2: keypad_led_toggle(note); break;
+        if(value <= 2) {
+          switch(value) {
+            case 0: keypad_led_off(note); break;
+            case 1: keypad_led_on(note); break;
+            case 2: keypad_led_toggle(note); break;
+          }
+        } else if(value <= 0x7F) {
+          keypad_led_blink(note, value);
         }
       }
     }
-- 
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