summaryrefslogtreecommitdiff
path: root/keyboard/lightpad/matrix.c
diff options
context:
space:
mode:
authorRalf Schmitt <ralf@bunkertor.net>2014-08-23 17:16:16 +0200
committerRalf Schmitt <ralf@bunkertor.net>2014-08-24 16:31:12 +0200
commitaf19f56ec98d27ab939b024effefcbebbab8f125 (patch)
treea36580e1181affb90423987063d423a498479584 /keyboard/lightpad/matrix.c
parent79840c678e13f9a737f80048bc3b9c9c55e3fc77 (diff)
Support for Lightpad keypad
Diffstat (limited to 'keyboard/lightpad/matrix.c')
-rw-r--r--keyboard/lightpad/matrix.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/keyboard/lightpad/matrix.c b/keyboard/lightpad/matrix.c
new file mode 100644
index 0000000000..87d338395b
--- /dev/null
+++ b/keyboard/lightpad/matrix.c
@@ -0,0 +1,205 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "eeconfig.h"
+#include "action_layer.h"
+#include "backlight.h"
+
+#ifndef DEBOUNCE
+# define DEBOUNCE 0
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static uint8_t read_rows(void);
+static uint8_t read_fwkey(void);
+static void init_rows(void);
+static void unselect_cols(void);
+static void select_col(uint8_t col);
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void misc_init(void) {
+}
+
+void matrix_init(void)
+{
+ backlight_init_ports();
+ unselect_cols();
+ init_rows();
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ matrix[i] = 0;
+ matrix_debouncing[i] = 0;
+ }
+}
+
+uint8_t matrix_scan(void)
+{
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ select_col(col);
+ _delay_us(3);
+ uint8_t rows = read_rows();
+ // Use the otherwise unused col: 0 row: 0 for firmware key
+ if(col == 0) {
+ rows |= read_fwkey();
+ }
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
+ bool curr_bit = rows & (1<<row);
+ if (prev_bit != curr_bit) {
+ matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
+ if (debouncing) {
+ dprint("bounce!: "); dprintf("%02X", debouncing); dprintln();
+ }
+ debouncing = DEBOUNCE;
+ }
+ }
+ unselect_cols();
+ }
+
+ 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];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 0123456789ABCDEF\n");
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ count += bitpop32(matrix[i]);
+ }
+ return count;
+}
+
+/* Row configuration
+ *
+ * row: 0 1 2 3 4 5
+ * pin: PD0 PD1 PD2 PD3 PD5 PB7
+ *
+ * Firmware uses pin PE2
+ */
+static void init_rows(void)
+{
+ DDRD &= ~0b00101111;
+ PORTD |= 0b00101111;
+
+ DDRB &= ~0b10000000;
+ PORTB |= 0b10000000;
+
+ DDRE &= ~0b00000100;
+ PORTE |= 0b00000100;
+}
+
+static uint8_t read_rows(void)
+{
+ return (PIND&(1<<0) ? (1<<0) : 0) |
+ (PIND&(1<<1) ? (1<<1) : 0) |
+ (PIND&(1<<2) ? (1<<2) : 0) |
+ (PIND&(1<<3) ? (1<<3) : 0) |
+ (PIND&(1<<5) ? (1<<4) : 0) |
+ (PINB&(1<<7) ? (1<<5) : 0);
+}
+
+static uint8_t read_fwkey(void)
+{
+ return PINE&(1<<2) ? 0 : (1<<0);
+}
+
+/* Column configuration
+ *
+ * col: 0 1 2 3
+ * pin: PF0 PF1 PC7 PC6
+ */
+static void unselect_cols(void)
+{
+ DDRF |= 0b00000011;
+ PORTF &= ~0b00000011;
+ DDRC |= 0b11000000;
+ PORTC &= ~0b11000000;
+}
+
+static void select_col(uint8_t col)
+{
+ switch (col) {
+ case 0:
+ PORTF |= (1<<0);
+ break;
+ case 1:
+ PORTF |= (1<<1);
+ break;
+ case 2:
+ PORTC |= (1<<7);
+ break;
+ case 3:
+ PORTC |= (1<<6);
+ break;
+ }
+}