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-rw-r--r--keyboards/lets_split/uno_slave/uno-matrix.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/keyboards/lets_split/uno_slave/uno-matrix.c b/keyboards/lets_split/uno_slave/uno-matrix.c
new file mode 100644
index 000000000..4ac3c33ac
--- /dev/null
+++ b/keyboards/lets_split/uno_slave/uno-matrix.c
@@ -0,0 +1,160 @@
+#define F_CPU 16000000UL
+
+#include <util/delay.h>
+#include <avr/io.h>
+#include <stdlib.h>
+
+#include "uno-matrix.h"
+
+#define debug(X) NULL
+#define debug_hex(X) NULL
+
+#ifndef DEBOUNCE
+# define DEBOUNCE 5
+#endif
+
+static uint8_t debouncing = DEBOUNCE;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+ //debug_enable = true;
+ //debug_matrix = true;
+ //debug_mouse = true;
+ // initialize row and col
+ unselect_rows();
+ init_cols();
+
+ // initialize matrix state: all keys off
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ matrix[i] = 0;
+ matrix_debouncing[i] = 0;
+ }
+}
+
+uint8_t matrix_scan(void)
+{
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ select_row(i);
+ _delay_us(30); // without this wait read unstable value.
+ matrix_row_t cols = read_cols();
+ //Serial.println(cols, BIN);
+ if (matrix_debouncing[i] != cols) {
+ matrix_debouncing[i] = cols;
+ if (debouncing) {
+ debug("bounce!: "); debug_hex(debouncing); debug("\n");
+ }
+ debouncing = DEBOUNCE;
+ }
+ unselect_rows();
+ }
+
+ if (debouncing) {
+ if (--debouncing) {
+ _delay_ms(1);
+ } else {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ }
+ }
+
+ return 1;
+}
+
+bool matrix_is_modified(void)
+{
+ if (debouncing) return false;
+ return true;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & ((matrix_row_t)1<<col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+ return matrix[row];
+}
+
+// TODO update this comment
+/* Column pin configuration
+ * col: 0 1 2 3 4 5
+ * pin: D3 D4 D5 D6 D7 B0
+ */
+static void init_cols(void)
+{
+ // Input with pull-up(DDR:0, PORT:1)
+ DDRD &= ~(1<<3 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
+ PORTD |= (1<<3 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
+
+ DDRB &= ~(1<<0);
+ PORTB |= (1<<0);
+}
+
+static matrix_row_t read_cols(void)
+{
+ return (PIND&(1<<3) ? 0 : (1<<0)) |
+ (PIND&(1<<4) ? 0 : (1<<1)) |
+ (PIND&(1<<5) ? 0 : (1<<2)) |
+ (PIND&(1<<6) ? 0 : (1<<3)) |
+ (PIND&(1<<7) ? 0 : (1<<4)) |
+ (PINB&(1<<0) ? 0 : (1<<5));
+}
+
+/* Row pin configuration
+ * row: 0 1 2 3
+ * pin: C0 C1 C2 C3
+ */
+static void unselect_rows(void)
+{
+ // Hi-Z(DDR:0, PORT:0) to unselect
+ DDRC &= ~0xF;
+ PORTC &= ~0xF;
+}
+
+static void select_row(uint8_t row)
+{
+ // Output low(DDR:1, PORT:0) to select
+ switch (row) {
+ case 0:
+ DDRC |= (1<<0);
+ PORTC &= ~(1<<0);
+ break;
+ case 1:
+ DDRC |= (1<<1);
+ PORTC &= ~(1<<1);
+ break;
+ case 2:
+ DDRC |= (1<<2);
+ PORTC &= ~(1<<2);
+ break;
+ case 3:
+ DDRC |= (1<<3);
+ PORTC &= ~(1<<3);
+ break;
+ }
+}