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Diffstat (limited to 'keyboards/handwired/xealous/matrix.c')
| -rw-r--r-- | keyboards/handwired/xealous/matrix.c | 376 |
1 files changed, 376 insertions, 0 deletions
diff --git a/keyboards/handwired/xealous/matrix.c b/keyboards/handwired/xealous/matrix.c new file mode 100644 index 000000000..27fad0008 --- /dev/null +++ b/keyboards/handwired/xealous/matrix.c @@ -0,0 +1,376 @@ +/* +Copyright 2012 Jun Wako <wakojun@gmail.com> + +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" +#ifdef DEBUG_MATRIX_SCAN_RATE + #include "matrix_scanrate.h" +#endif + + + +#ifdef USE_I2C +# include "i2c.h" +#else // USE_SERIAL +# error "only i2c supported" +#endif + +#ifndef DEBOUNCING_DELAY +# define DEBOUNCING_DELAY 5 +#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 + +#define ERROR_DISCONNECT_COUNT 5 + +#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]; +static matrix_row_t* debouncing_matrix_hand_offsetted; //pointer to matrix_debouncing for our hand +static matrix_row_t* matrix_hand_offsetted; // pointer to matrix for our hand + +//Debouncing counters +typedef uint8_t debounce_counter_t; +#define DEBOUNCE_COUNTER_MODULO 250 +#define DEBOUNCE_COUNTER_INACTIVE 251 +static debounce_counter_t debounce_counters[MATRIX_ROWS * MATRIX_COLS]; +static debounce_counter_t *debounce_counters_hand_offsetted; + + +#if (DIODE_DIRECTION == ROW2COL) + error "Only Col2Row supported"; +#endif +static void init_cols(void); +static void unselect_rows(void); +static void select_row(uint8_t row); +static void unselect_row(uint8_t row); +static matrix_row_t optimized_col_reader(void); + +__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) { +} + +__attribute__ ((weak)) +void matrix_slave_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) +{ +#ifdef DISABLE_JTAG + // JTAG disable for PORT F. write JTD bit twice within four cycles. + MCUCR |= (1<<JTD); + MCUCR |= (1<<JTD); +#endif + + debug_enable = true; + debug_matrix = false; + debug_mouse = false; + // 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; + } + int my_hand_offset = isLeftHand ? 0 : (ROWS_PER_HAND); + debouncing_matrix_hand_offsetted = matrix_debouncing + my_hand_offset; + matrix_hand_offsetted = matrix + my_hand_offset; + debounce_counters_hand_offsetted = debounce_counters + my_hand_offset; + + for (uint8_t i = 0; i < MATRIX_ROWS * MATRIX_COLS; i++) { + debounce_counters[i] = DEBOUNCE_COUNTER_INACTIVE; + } + + matrix_init_quantum(); + +} + +//#define TIMER_DIFF(a, b, max) ((a) >= (b) ? (a) - (b) : (max) - (b) + (a)) +void update_debounce_counters(uint8_t current_time) +{ + debounce_counter_t *debounce_pointer = debounce_counters_hand_offsetted; + for (uint8_t row = 0; row < ROWS_PER_HAND; row++) + { + for (uint8_t col = 0; col < MATRIX_COLS; col++) + { + if (*debounce_pointer != DEBOUNCE_COUNTER_INACTIVE) + { + if (TIMER_DIFF(current_time, *debounce_pointer, DEBOUNCE_COUNTER_MODULO) >= + DEBOUNCING_DELAY) { + *debounce_pointer = DEBOUNCE_COUNTER_INACTIVE; + } + } + debounce_pointer++; + } + } +} + +void transfer_matrix_values(uint8_t current_time) +{ + //upload from debounce_matrix to final matrix; + debounce_counter_t *debounce_pointer = debounce_counters_hand_offsetted; + for (uint8_t row = 0; row < ROWS_PER_HAND; row++) + { + matrix_row_t row_value = matrix_hand_offsetted[row]; + matrix_row_t debounce_value = debouncing_matrix_hand_offsetted[row]; + + for (uint8_t col = 0; col < MATRIX_COLS; col++) + { + bool final_value = debounce_value & (1 << col); + bool current_value = row_value & (1 << col); + if (*debounce_pointer == DEBOUNCE_COUNTER_INACTIVE + && (current_value != final_value)) + { + *debounce_pointer = current_time; + row_value ^= (1 << col); + } + debounce_pointer++; + } + matrix_hand_offsetted[row] = row_value; + } +} + +uint8_t _matrix_scan(void) +{ + uint8_t current_time = timer_read() % DEBOUNCE_COUNTER_MODULO; + + // Set row, read cols + for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) { + select_row(current_row); + asm volatile ("nop"); asm volatile("nop"); + + debouncing_matrix_hand_offsetted[current_row] = optimized_col_reader(); + // Unselect row + unselect_row(current_row); + } + + update_debounce_counters(current_time); + transfer_matrix_values(current_time); + + return 1; +} + + +// 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(I2C_KEYMAP_START); + 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; +} + +uint8_t matrix_scan(void) +{ +#ifdef DEBUG_MATRIX_SCAN_RATE + matrix_check_scan_rate(); + matrix_time_between_scans(); +#endif + uint8_t ret = _matrix_scan(); + + if( i2c_transaction() ) { + // 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; + } + matrix_scan_quantum(); + return ret; +} + +void matrix_slave_scan(void) { + _matrix_scan(); + + int offset = (isLeftHand) ? 0 : ROWS_PER_HAND; + + for (int i = 0; i < ROWS_PER_HAND; ++i) { + i2c_slave_buffer[I2C_KEYMAP_START+i] = matrix[offset+i]; + } + + matrix_slave_scan_user(); +} + +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(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 + } +} + +inline +static matrix_row_t optimized_col_reader(void) { + //MATRIX_COL_PINS { B6, B2, B3, B1, F7, F6, F5, F4 } + return (PINB & (1 << 6) ? 0 : (ROW_SHIFTER << 0)) | + (PINB & (1 << 2) ? 0 : (ROW_SHIFTER << 1)) | + (PINB & (1 << 3) ? 0 : (ROW_SHIFTER << 2)) | + (PINB & (1 << 1) ? 0 : (ROW_SHIFTER << 3)) | + (PINF & (1 << 7) ? 0 : (ROW_SHIFTER << 4)) | + (PINF & (1 << 6) ? 0 : (ROW_SHIFTER << 5)) | + (PINF & (1 << 5) ? 0 : (ROW_SHIFTER << 6)) | + (PINF & (1 << 4) ? 0 : (ROW_SHIFTER << 7)); +} + + +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 + } +} + |