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-rw-r--r--keyboards/sx60/matrix.c307
1 files changed, 307 insertions, 0 deletions
diff --git a/keyboards/sx60/matrix.c b/keyboards/sx60/matrix.c
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+/*
+Copyright 2012-2017 Jun Wako, Jack Humbert
+
+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>
+#if defined(__AVR__)
+#include <avr/io.h>
+#endif
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "timer.h"
+#include "sx60.h"
+
+
+/* Set 0 if debouncing isn't needed */
+
+#ifndef DEBOUNCING_DELAY
+# define DEBOUNCING_DELAY 5
+#endif
+
+#if (DEBOUNCING_DELAY > 0)
+ static uint16_t debouncing_time;
+ static bool debouncing = false;
+#endif
+
+#if (MATRIX_COLS <= 8)
+# define print_matrix_header() print("\nr/c 01234567\n")
+# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
+# define matrix_bitpop(i) bitpop(matrix[i])
+# define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+# define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
+# define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
+# define matrix_bitpop(i) bitpop16(matrix[i])
+# define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+# define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+# define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
+# define matrix_bitpop(i) bitpop32(matrix[i])
+# define ROW_SHIFTER ((uint32_t)1)
+#endif
+
+#ifdef MATRIX_MASKED
+ extern const matrix_row_t matrix_mask[];
+#endif
+
+static const uint8_t col_pins[ATMEGA_COLS] = MATRIX_COL_PINS;
+static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+static uint8_t mcp23018_reset_loop;
+
+
+static void init_cols(void);
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+
+__attribute__ ((weak))
+void matrix_init_quantum(void) {
+ matrix_init_kb();
+}
+
+__attribute__ ((weak))
+void matrix_scan_quantum(void) {
+ matrix_scan_kb();
+}
+
+__attribute__ ((weak))
+void matrix_init_kb(void) {
+ matrix_init_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_kb(void) {
+ matrix_scan_user();
+}
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+}
+
+inline
+uint8_t matrix_rows(void) {
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void) {
+ return MATRIX_COLS;
+}
+
+void matrix_init(void) {
+
+ /* To use PORTF disable JTAG with writing JTD bit twice within four cycles. */
+ #if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
+ MCUCR |= _BV(JTD);
+ MCUCR |= _BV(JTD);
+ #endif
+
+ mcp23018_status = 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;
+ }
+
+ matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void)
+{
+ if (mcp23018_status) {
+ /* if there was an error */
+ if (++mcp23018_reset_loop == 0) {
+ /* since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
+ this will be approx bit more frequent than once per second */
+ print("trying to reset mcp23018\n");
+ mcp23018_status = init_mcp23018();
+ if (mcp23018_status) {
+ print("left side not responding\n");
+ } else {
+ print("left side attached\n");
+ }
+ }
+ }
+
+ /* Set row, read cols */
+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+# if (DEBOUNCING_DELAY > 0)
+ bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
+
+ if (matrix_changed) {
+ debouncing = true;
+ debouncing_time = timer_read();
+ }
+# else
+ read_cols_on_row(matrix, current_row);
+# endif
+ }
+
+# if (DEBOUNCING_DELAY > 0)
+ if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ debouncing = false;
+ }
+# endif
+
+ matrix_scan_quantum();
+ return 1;
+}
+
+bool matrix_is_modified(void)
+{
+#if (DEBOUNCING_DELAY > 0)
+ if (debouncing) return false;
+#endif
+ 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)
+{
+ /* Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
+ switch blocker installed and the switch is always pressed. */
+#ifdef MATRIX_MASKED
+ return matrix[row] & matrix_mask[row];
+#else
+ return matrix[row];
+#endif
+}
+
+void matrix_print(void)
+{
+ print_matrix_header();
+
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ phex(row); print(": ");
+ print_matrix_row(row);
+ print("\n");
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ count += matrix_bitpop(i);
+ }
+ return count;
+}
+
+static void init_cols(void)
+{
+ for(uint8_t x = 0; x < ATMEGA_COLS; x++) {
+ uint8_t pin = col_pins[x];
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); /* IN */
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); /* HI */
+ }
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
+{
+ /* Store last value of row prior to reading */
+ matrix_row_t last_row_value = current_matrix[current_row];
+
+ /* Clear data in matrix row */
+ current_matrix[current_row] = 0;
+
+ /* Select row and wait for row selecton to stabilize */
+ select_row(current_row);
+ wait_us(30);
+
+ if (mcp23018_status) {
+ /* if there was an error */
+ return 0;
+ } else {
+ uint16_t data = 0;
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(GPIOA); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_start(I2C_ADDR_READ); if (mcp23018_status) goto out;
+ data = i2c_readNak();
+ data = ~data;
+ out:
+ i2c_stop();
+ current_matrix[current_row] |= (data << 8);
+ }
+
+ /* For each col... */
+ for(uint8_t col_index = 0; col_index < ATMEGA_COLS; col_index++) {
+ /* Select the col pin to read (active low) */
+ uint8_t pin = col_pins[col_index];
+ uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+ /* Populate the matrix row with the state of the col pin */
+ current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
+ }
+
+ /* Unselect row */
+ unselect_rows();
+
+ return (last_row_value != current_matrix[current_row]);
+}
+
+static void select_row(uint8_t row)
+{
+ if (mcp23018_status) {
+ /* if there was an error do nothing */
+ } else {
+ /* set active row low : 0
+ set active row output : 1
+ set other rows hi-Z : 1 */
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(GPIOB); if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0xFF & ~(1<<abs(row-4))); if (mcp23018_status) goto out;
+ out:
+ i2c_stop();
+ }
+
+ uint8_t pin = row_pins[row];
+ _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); /* OUT */
+ _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); /* LOW */
+}
+
+static void unselect_rows(void)
+{
+ for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
+ uint8_t pin = row_pins[x];
+ _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); /* IN */
+ _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); /* HI */
+ }
+}
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