From 2f80e790c6310ad24a4cb3d4a72c31314364fef7 Mon Sep 17 00:00:00 2001
From: tmk <nobody@nowhere>
Date: Wed, 27 Oct 2010 20:51:45 +0900
Subject: new build method for macway

---
 macway/matrix.c | 90 ++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 70 insertions(+), 20 deletions(-)

(limited to 'macway/matrix.c')

diff --git a/macway/matrix.c b/macway/matrix.c
index cb52d79c3..30da657ea 100644
--- a/macway/matrix.c
+++ b/macway/matrix.c
@@ -1,10 +1,13 @@
 /*
  * scan matrix
  */
+#include <stdint.h>
+#include <stdbool.h>
 #include <avr/io.h>
 #include <util/delay.h>
-#include "keymap.h"
 #include "matrix.h"
+#include "print.h"
+#include "util.h"
 
 // matrix is active low. (key on: 0/key off: 1)
 // row: Hi-Z(unselected)/low output(selected)
@@ -18,11 +21,24 @@ uint8_t *matrix_prev;
 static uint8_t _matrix0[MATRIX_ROWS];
 static uint8_t _matrix1[MATRIX_ROWS];
 
+static bool matrix_has_ghost_in_row(uint8_t row);
 static uint8_t read_col(void);
 static void unselect_rows(void);
 static void select_row(uint8_t row);
 
 
+inline
+int matrix_rows(void)
+{
+    return MATRIX_ROWS;
+}
+
+inline
+int matrix_cols(void)
+{
+    return MATRIX_COLS;
+}
+
 // this must be called once before matrix_scan.
 void matrix_init(void)
 {
@@ -32,58 +48,91 @@ void matrix_init(void)
     PORTB = 0xFF;
 
     // initialize matrix state: all keys off
-    for (int i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0xFF;
-    for (int i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0xFF;
+    for (int i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
+    for (int i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
     matrix = _matrix0;
     matrix_prev = _matrix1;
 }
 
-uint8_t matrix_scan(void)
+int matrix_scan(void)
 {
-    uint8_t row, state;
     uint8_t *tmp;
 
     tmp = matrix_prev;
     matrix_prev = matrix;
     matrix = tmp;
 
-    for (row = 0; row < MATRIX_ROWS; row++) {
-        select_row(row);
+    for (int i = 0; i < MATRIX_ROWS; i++) {
+        select_row(i);
         _delay_us(30);  // without this wait read unstable value.
-        state = read_col();
+        matrix[i] = ~read_col();
         unselect_rows();
-
-        matrix[row] = state;
     }
     return 1;
 }
 
-bool matrix_is_modified(void) {
-    for (int i=0; i <MATRIX_ROWS; i++) {
+bool matrix_is_modified(void)
+{
+    for (int i = 0; i < MATRIX_ROWS; i++) {
         if (matrix[i] != matrix_prev[i])
             return true;
     }
     return false;
 }
 
-bool matrix_has_ghost(void) {
-    for (int i=0; i <MATRIX_ROWS; i++) {
+bool matrix_has_ghost(void)
+{
+    for (int i = 0; i < MATRIX_ROWS; i++) {
         if (matrix_has_ghost_in_row(i))
             return true;
     }
     return false;
 }
 
-bool matrix_has_ghost_in_row(uint8_t row) {
-    uint8_t state = ~matrix[row];
+inline
+bool matrix_is_on(int row, int col)
+{
+    return (matrix[row] & (1<<col));
+}
+
+inline
+uint16_t matrix_get_row(int row)
+{
+    return matrix[row];
+}
+
+void matrix_print(void)
+{
+    print("\nr/c 01234567\n");
+    for (int row = 0; row < matrix_rows(); row++) {
+        phex(row); print(": ");
+        pbin_reverse(matrix_get_row(row));
+        if (matrix_has_ghost_in_row(row)) {
+            print(" <ghost");
+        }
+        print("\n");
+    }
+}
+
+int matrix_key_count(void)
+{
+    int count = 0;
+    for (int i = 0; i < MATRIX_ROWS; i++) {
+        count += bitpop(matrix[i]);
+    }
+    return count;
+}
+
+static bool matrix_has_ghost_in_row(uint8_t row)
+{
     // no ghost exists in case less than 2 keys on
-    if (((state - 1) & state) == 0)
+    if (((matrix[row] - 1) & matrix[row]) == 0)
         return false;
 
     // ghost exists in case same state as other row
     for (int i=0; i < MATRIX_ROWS; i++) {
-        if (i == row) continue;
-        if ((~matrix[i] & state) == state) return true;
+        if (i != row && (matrix[i] & matrix[row]) == matrix[row])
+            return true;
     }
     return false;
 }
@@ -93,7 +142,8 @@ static uint8_t read_col(void)
     return PINB;
 }
 
-static void unselect_rows(void) {
+static void unselect_rows(void)
+{
     DDRD  = 0x00;
     PORTD = 0x00;
     DDRC  = 0x00;
-- 
cgit v1.2.3-70-g09d2