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authorRalf Schmitt <ralf@bunkertor.net>2014-11-11 14:49:16 +0100
committerRalf Schmitt <ralf@bunkertor.net>2015-01-18 11:43:37 +0100
commitd9b5f5110ebf3e7da6a11e8640fb4367114aed67 (patch)
tree7f5119dede12c7f35da6f454caf125ea5fad7d5a /keyboard/nerd/matrix.c
parentf31cbc7219c9a1903331771c10056302817e68ca (diff)
Added NerD 60% support
Diffstat (limited to 'keyboard/nerd/matrix.c')
-rw-r--r--keyboard/nerd/matrix.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/keyboard/nerd/matrix.c b/keyboard/nerd/matrix.c
new file mode 100644
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--- /dev/null
+++ b/keyboard/nerd/matrix.c
@@ -0,0 +1,220 @@
+/*
+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 "backlight.h"
+
+
+#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 uint16_t read_inputs(void);
+static void init_inputs(void);
+static void init_outputs(void);
+static void reset_inputs(void);
+static void reset_outputs(void);
+static void select_output(uint8_t col);
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+ backlight_init_ports();
+ init_inputs();
+ init_outputs();
+
+ 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++) {
+ reset_inputs();
+ reset_outputs();
+ select_output(col);
+ _delay_us(3);
+ uint16_t rows = read_inputs();
+ 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;
+ }
+ }
+ }
+
+ 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++) {
+ phex(row); print(": ");
+ pbin_reverse16(matrix_get_row(row));
+ print("\n");
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ count += bitpop16(matrix[i]);
+ }
+ return count;
+}
+
+static void init_inputs(void)
+{
+ DDRE &= ~0b01000000; // PE6 (Col 0)
+ DDRB &= ~0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4)
+ DDRF &= ~0b00000001; // PF0 (Col 5)
+ DDRD &= ~0b00100001; // PD0 (Col 6), PD5 (Col 7)
+}
+
+static uint16_t read_inputs(void)
+{
+ return (PINE&(1<<6) ? 0 : (1<<0)) | // PE6 (Row 0)
+ (PINB&(1<<0) ? 0 : (1<<1)) | // PB0 (Row 1)
+ (PINB&(1<<1) ? 0 : (1<<2)) | // PB1 (Row 2)
+ (PINB&(1<<2) ? 0 : (1<<3)) | // PB2 (Row 3)
+ (PINB&(1<<3) ? 0 : (1<<4)) | // PB3 (Row 4)
+ (PINF&(1<<0) ? 0 : (1<<5)) | // PF0 (Row 5)
+ (PIND&(1<<0) ? 0 : (1<<6)) | // PD0 (Row 6)
+ (PIND&(1<<5) ? 0 : (1<<7)); // PD5 (Row 7)
+}
+
+static void reset_inputs(void)
+{
+ PORTE |= 0b01000000; // PE6 (Col 0)
+ PORTB |= 0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4)
+ PORTF |= 0b00000001; // PF0 (Col 5)
+ PORTD |= 0b00100001; // PD0 (Col 6), PD5 (Col 7)
+}
+
+static void init_outputs(void)
+{
+ DDRB |= 0b00010000; // PB4 (Row 0)
+ DDRE |= 0b00000100; // PE2 (Row 1)
+ DDRF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7)
+ DDRC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9)
+ DDRD |= 0b10000000; // PD7 (Row 8)
+}
+
+static void reset_outputs(void)
+{
+ PORTB |= 0b00010000; // PB4 (Row 0)
+ PORTE |= 0b00000100; // PE2 (Row 1)
+ PORTF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7)
+ PORTC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9)
+ PORTD |= 0b10000000; // PD7 (Row 8)
+}
+
+static void select_output(uint8_t col)
+{
+ switch (col) {
+ case 0:
+ PORTB &= ~(1<<4);
+ break;
+ case 1:
+ PORTE &= ~(1<<2);
+ break;
+ case 2:
+ PORTF &= ~(1<<4);
+ break;
+ case 3:
+ PORTF &= ~(1<<7);
+ break;
+ case 4:
+ PORTF &= ~(1<<1);
+ break;
+ case 5:
+ PORTF &= ~(1<<6);
+ break;
+ case 6:
+ PORTC &= ~(1<<6);
+ break;
+ case 7:
+ PORTF &= ~(1<<5);
+ break;
+ case 8:
+ PORTD &= ~(1<<7);
+ break;
+ case 9:
+ PORTC &= ~(1<<7);
+ break;
+ }
+}