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- /*
- Copyright 2017 Danny Nguyen <danny@keeb.io>
-
- 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/>.
- */
-
- /*
- * scan matrix
- */
- #include <stdint.h>
- #include <stdbool.h>
- #include <avr/io.h>
- #include "wait.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "matrix.h"
- #include "split_util.h"
- #include "pro_micro.h"
- #include "config.h"
- #include "timer.h"
- #include "backlight.h"
-
- #ifdef USE_I2C
- # include "i2c.h"
- #else // USE_SERIAL
- # include "serial.h"
- #endif
-
- #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)
- #else
- # error "Currently only supports 8 COLS"
- #endif
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- #define ERROR_DISCONNECT_COUNT 5
-
- #define SERIAL_LED_ADDR 0x00
-
- #define ROWS_PER_HAND (MATRIX_ROWS/2)
-
- static uint8_t error_count = 0;
-
- static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
- static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- #if (DIODE_DIRECTION == COL2ROW)
- 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);
- static void unselect_row(uint8_t row);
- #elif (DIODE_DIRECTION == ROW2COL)
- static void init_rows(void);
- static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
- static void unselect_cols(void);
- static void unselect_col(uint8_t col);
- static void select_col(uint8_t col);
- #endif
-
- __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)
- {
- debug_enable = true;
- debug_matrix = true;
- debug_mouse = true;
- // initialize row and col
- unselect_rows();
- init_cols();
-
- TX_RX_LED_INIT;
-
- // 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)
- {
- int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
- #if (DIODE_DIRECTION == COL2ROW)
- // Set row, read cols
- for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
- # if (DEBOUNCING_DELAY > 0)
- bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
-
- if (matrix_changed) {
- debouncing = true;
- debouncing_time = timer_read();
- }
-
- # else
- read_cols_on_row(matrix+offset, current_row);
- # endif
-
- }
-
- #elif (DIODE_DIRECTION == ROW2COL)
- // Set col, read rows
- for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
- # if (DEBOUNCING_DELAY > 0)
- bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
- if (matrix_changed) {
- debouncing = true;
- debouncing_time = timer_read();
- }
- # else
- read_rows_on_col(matrix+offset, current_col);
- # endif
-
- }
- #endif
-
- # if (DEBOUNCING_DELAY > 0)
- if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
- for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
- matrix[i+offset] = matrix_debouncing[i+offset];
- }
- debouncing = false;
- }
- # endif
-
- return 1;
- }
-
- #ifdef USE_I2C
-
- // Get rows from other half over i2c
- int i2c_transaction(void) {
- int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-
- int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
- if (err) goto i2c_error;
-
- // start of matrix stored at 0x00
- err = i2c_master_write(0x00);
- if (err) goto i2c_error;
-
- // Start read
- err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
- if (err) goto i2c_error;
-
- if (!err) {
- int i;
- for (i = 0; i < ROWS_PER_HAND-1; ++i) {
- matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
- }
- matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
- i2c_master_stop();
- } else {
- i2c_error: // the cable is disconnceted, or something else went wrong
- i2c_reset_state();
- return err;
- }
-
- return 0;
- }
-
- #else // USE_SERIAL
-
- int serial_transaction(void) {
- int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-
- if (serial_update_buffers()) {
- return 1;
- }
-
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- matrix[slaveOffset+i] = serial_slave_buffer[i];
- }
-
- #ifdef BACKLIGHT_ENABLE
- // Write backlight level for slave to read
- serial_master_buffer[SERIAL_LED_ADDR] = get_backlight_level();
- #endif
- return 0;
- }
- #endif
-
- uint8_t matrix_scan(void)
- {
- uint8_t ret = _matrix_scan();
-
- #ifdef USE_I2C
- if( i2c_transaction() ) {
- #else // USE_SERIAL
- if( serial_transaction() ) {
- #endif
- // turn on the indicator led when halves are disconnected
- TXLED1;
-
- error_count++;
-
- if (error_count > ERROR_DISCONNECT_COUNT) {
- // reset other half if disconnected
- int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- matrix[slaveOffset+i] = 0;
- }
- }
- } else {
- // turn off the indicator led on no error
- TXLED0;
- error_count = 0;
- }
- return ret;
- }
-
- void matrix_slave_scan(void) {
- _matrix_scan();
-
- int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
-
- #ifdef USE_I2C
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- i2c_slave_buffer[i] = matrix[offset+i];
- }
- #else // USE_SERIAL
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- serial_slave_buffer[i] = matrix[offset+i];
- }
-
- #ifdef BACKLIGHT_ENABLE
- // Read backlight level sent from master and update level on slave
- backlight_set(serial_master_buffer[SERIAL_LED_ADDR]);
- #endif
- #endif
- }
-
- 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;
- }
-
- #if (DIODE_DIRECTION == COL2ROW)
-
- static void init_cols(void)
- {
- for(uint8_t x = 0; x < MATRIX_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);
-
- // For each col...
- for(uint8_t col_index = 0; col_index < MATRIX_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_row(current_row);
-
- return (last_row_value != current_matrix[current_row]);
- }
-
- static void select_row(uint8_t row)
- {
- 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_row(uint8_t row)
- {
- uint8_t pin = row_pins[row];
- _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
- _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
- }
-
- static void unselect_rows(void)
- {
- for(uint8_t x = 0; x < ROWS_PER_HAND; 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
- }
- }
-
- #elif (DIODE_DIRECTION == ROW2COL)
-
- static void init_rows(void)
- {
- for(uint8_t x = 0; x < ROWS_PER_HAND; 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
- }
- }
-
- static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
- {
- bool matrix_changed = false;
-
- // Select col and wait for col selecton to stabilize
- select_col(current_col);
- wait_us(30);
-
- // For each row...
- for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
- {
-
- // Store last value of row prior to reading
- matrix_row_t last_row_value = current_matrix[row_index];
-
- // Check row pin state
- if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
- {
- // Pin LO, set col bit
- current_matrix[row_index] |= (ROW_SHIFTER << current_col);
- }
- else
- {
- // Pin HI, clear col bit
- current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
- }
-
- // Determine if the matrix changed state
- if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
- {
- matrix_changed = true;
- }
- }
-
- // Unselect col
- unselect_col(current_col);
-
- return matrix_changed;
- }
-
- static void select_col(uint8_t col)
- {
- uint8_t pin = col_pins[col];
- _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
- _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
- }
-
- static void unselect_col(uint8_t col)
- {
- uint8_t pin = col_pins[col];
- _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
- _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
- }
-
- static void unselect_cols(void)
- {
- for(uint8_t x = 0; x < MATRIX_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
- }
- }
-
- #endif
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