From 31c61e05a1a1d95574cc1ca4bcb9b2cc41d914cb Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Sun, 1 Jun 2014 19:02:09 +0000
Subject: furhter cleanup


diff --git a/software/rhmixxx/keypad.c b/software/rhmixxx/keypad.c
index 196050b..7a58ad0 100644
--- a/software/rhmixxx/keypad.c
+++ b/software/rhmixxx/keypad.c
@@ -28,19 +28,22 @@
 #define KEYPAD_PIN PINA
 #define KEYPAD_PORT PORTA
 #define KEYPAD_DDR DDRA
+#define KEYPAD_NUM_COLS 4
+#define KEYPAD_NUM_ROWS 4
+#define KEYPAD_NUM_KEYS KEYPAD_NUM_COLS * KEYPAD_NUM_ROWS
 
 #define KEYPAD_LP_CNT_MAX 200
 static struct {
   uint8_t last_sent;
   int16_t lp_cnt;
-} keypad_state[16];
+} keypad_state[KEYPAD_NUM_KEYS];
 
 void keypad_init(void)
 {
   KEYPAD_DDR = 0x00;
   KEYPAD_PORT = 0x0F;
   uint8_t i;
-  for(i = 0; i < 16; ++i) {
+  for(i = 0; i < KEYPAD_NUM_KEYS; ++i) {
     keypad_state[i].last_sent = 0;
     keypad_state[i].lp_cnt = 0;
   }
@@ -146,13 +149,13 @@ static void keypad_key_lowpass(uint8_t key_idx, uint8_t current_state)
 void keypad_task(void)
 {
   uint8_t col, row;
-  for(col = 0; col < 4; ++col) {
+  for(col = 0; col < KEYPAD_NUM_COLS; ++col) {
     KEYPAD_DDR = 1 << (col + 4);
     KEYPAD_PORT = 0x0F;
     _delay_us(10);
 
-    for(row = 0; row < 4; ++row) {
-      uint8_t key_idx = col*4 + row;
+    for(row = 0; row < KEYPAD_NUM_ROWS; ++row) {
+      uint8_t key_idx = col*KEYPAD_NUM_ROWS + row;
 
       uint8_t current_state = KEYPAD_PIN & (1 << row);
       keypad_key_lowpass(key_idx, current_state);
-- 
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