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- /*
- Copyright 2012 Jun Wako <[email protected]>
-
- 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 <avr/wdt.h>
- #include <avr/interrupt.h>
- #include <util/delay.h>
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "timer.h"
- #include "matrix.h"
- #include "i2c.h"
- #include "serial.h"
- #include "split-util.h"
- #include "pro-micro.h"
- #include "config.h"
-
- #include "pin_defs.h"
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
-
- #define ERROR_DISCONNECT_COUNT 5
-
- #define I2C_MATRIX_ADDR 0x00
- #define I2C_LED_ADDR ROWS_PER_HAND
-
- static uint8_t debouncing = DEBOUNCE;
- static uint8_t error_count = 0;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
- static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
-
- 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)
- {
- // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
- MCUCR |= (1<<JTD);
- MCUCR |= (1<<JTD);
-
- 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)
- {
- // Right hand is stored after the left in the matirx so, we need to offset it
- int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
-
- for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
- select_row(i);
- _delay_us(30); // without this wait read unstable value.
- matrix_row_t cols = read_cols();
- if (matrix_debouncing[i+offset] != cols) {
- matrix_debouncing[i+offset] = cols;
- debouncing = DEBOUNCE;
- }
- unselect_rows();
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
- matrix[i+offset] = matrix_debouncing[i+offset];
- }
- }
- }
-
- return 1;
- }
-
- // Get rows from other half over i2c
- int i2c_transaction(void) {
- bool err = false;
- int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-
- err = i2c_master_read(
- SLAVE_I2C_ADDRESS, // i2c address of other half
- I2C_MATRIX_ADDR, // read the slaves matrix data
- matrix+slaveOffset, // store in correct position in master's matrix
- ROWS_PER_HAND // number of bytes to read
- );
-
- #ifdef I2C_WRITE_TEST_CODE
- // controls the RX led on the slave and toggles it every second
- uint8_t test_data = (timer_read() / 1000) % 2;
-
- err |= i2c_master_write(
- SLAVE_I2C_ADDRESS, // i2c address of other half
- I2C_LED_ADDR, // address for led control
- &test_data, // data to send
- sizeof(test_data) // size of test data
- );
- #endif
-
- return err;
- }
-
- 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];
- }
- return 0;
- }
-
- uint8_t matrix_scan(void)
- {
- int ret = _matrix_scan();
-
-
-
- #ifdef USE_I2C
- if( i2c_transaction() ) {
- #else
- 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 : (MATRIX_ROWS / 2);
-
- #ifdef USE_I2C
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- i2c_slave_write(I2C_MATRIX_ADDR+i, matrix[offset+i]);
- }
-
- #ifdef I2C_WRITE_TEST_CODE
- // control the pro micro RX LED based on what the
- // i2c master has sent us
- uint8_t led_state = i2c_slave_read(I2C_LED_ADDR);
- if (led_state == 1) {
- RXLED1;
- } else if(led_state == 0) {
- RXLED0;
- }
- #endif
-
- #else
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- serial_slave_buffer[i] = matrix[offset+i];
- }
- #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;
- }
-
-
- static void init_cols(void)
- {
- for(int x = 0; x < MATRIX_COLS; x++) {
- _SFR_IO8((col_pins[x] >> 4) + 1) &= ~_BV(col_pins[x] & 0xF);
- _SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
- }
- }
-
- static matrix_row_t read_cols(void)
- {
- matrix_row_t result = 0;
- for(int x = 0; x < MATRIX_COLS; x++) {
- result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
- }
- return result;
- }
-
- static void unselect_rows(void)
- {
- for(int x = 0; x < ROWS_PER_HAND; x++) {
- _SFR_IO8((row_pins[x] >> 4) + 1) &= ~_BV(row_pins[x] & 0xF);
- _SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
- }
- }
-
- static void select_row(uint8_t row)
- {
- _SFR_IO8((row_pins[row] >> 4) + 1) |= _BV(row_pins[row] & 0xF);
- _SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);
- }
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