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Diffstat (limited to 'keyboards/converter/ibm_5291/matrix.c')
| -rw-r--r-- | keyboards/converter/ibm_5291/matrix.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/keyboards/converter/ibm_5291/matrix.c b/keyboards/converter/ibm_5291/matrix.c new file mode 100644 index 000000000..58f6e37b6 --- /dev/null +++ b/keyboards/converter/ibm_5291/matrix.c @@ -0,0 +1,284 @@ +/* +Copyright 2018 listofoptions <listofoptions@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/>. +*/ + +#include <stdint.h> +#include <stdbool.h> +#include <string.h> +#if defined(__AVR__) +#include <avr/io.h> +#endif +#include <util/delay.h> + +#include "wait.h" +#include "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" +#include "timer.h" + +#include "config.h" + + +#ifndef DEBOUNCING_DELAY +# define DEBOUNCING_DELAY 5 +#endif + +#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) +#define check_bit(var,pos) ((var) & (1<<(pos))) + +#define NUM_ROW_PINS 5 +#define NUM_COL_PINS 2 + +static const uint8_t row_pins [NUM_ROW_PINS] = MATRIX_ROW_PINS ; +static const uint8_t col_pins [NUM_ROW_PINS] = MATRIX_COL_PINS ; + +#if ( DEBOUNCING_DELAY > 0 ) +static uint16_t debouncing_time ; +static bool debouncing = false ; +#endif + +static uint8_t matrix [MATRIX_ROWS] = {0}; + +#if ( DEBOUNCING_DELAY > 0 ) +static uint8_t matrix_debounce [MATRIX_ROWS] = {0}; +#endif + +static +inline +void toggle_led(void) { + uint8_t pin = LED_PIN ; + _SFR_IO8((pin >> 4) + 2) ^= _BV(pin & 0xF); +} + +static +inline +void init_led(void) { + uint8_t pin = LED_PIN ; + _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT + _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW +} + +static +inline +void init_data(void) { + uint8_t pin = MATRIX_DATA_PIN ; + _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN + _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // LO +} + +static +inline +void init_strobe(void) { + uint8_t pin = MATRIX_STROBE_PIN ; + _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT + _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI +} + +static +inline +void init_rows(void) { + for ( uint8_t i = 0 ; i < NUM_ROW_PINS; ++i ) { + uint8_t pin = row_pins[i]; + _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT + _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW + } +} + +static +inline +void init_cols(void) { + for ( uint8_t i = 0 ; i < NUM_COL_PINS; ++i ) { + uint8_t pin = col_pins[i]; + _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT + _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW + } +} + +static +inline +void select_row(uint8_t current_row) { + for ( uint8_t i = 0 ; i < NUM_ROW_PINS; ++i ) { + uint8_t pin = row_pins[i] ; + if ( check_bit( current_row, i ) ) { + _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI + } else { + _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW + } + } + wait_us(30) ; +} + +static +inline +void select_col(uint8_t current_col) { + for ( uint8_t i = 0 ; i < NUM_COL_PINS; ++i ) { + uint8_t pin = col_pins[i] ; + if ( check_bit( current_col, i ) ) { + _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI + } else { + _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW + } + } + wait_us(30) ; +} + +static +inline +uint8_t matrix_strobe(uint8_t col_index) { + uint8_t strobe_pin = MATRIX_STROBE_PIN ; + uint8_t data_pin = MATRIX_DATA_PIN ; + + // set strobe pin low + _SFR_IO8((strobe_pin >> 4) + 2) &= ~_BV(strobe_pin & 0xF); + + wait_us(30) ; + + // read data + uint8_t data = (_SFR_IO8(data_pin >> 4) & _BV(data_pin & 0xF)) ; + + // set strobe pin hi + _SFR_IO8((strobe_pin >> 4) + 2) |= _BV(strobe_pin & 0xF); + + uint8_t out = data ? (1 << col_index) : 0 ; + return out ; +} + +static +bool matrix_read(uint8_t current_matrix[], uint8_t current_row) { + // Store last value of row prior to reading + uint8_t last_row_value = current_matrix[current_row]; + + // Clear data in matrix row + current_matrix[current_row] = 0; + + select_row(current_row); + + // For each col... + for(uint8_t col_index = 0; col_index < MATRIX_COLS; ++col_index) { + + select_col(col_index) ; + + // strobe the matrix + // Populate the matrix row with the state of the data pin + current_matrix[current_row] |= matrix_strobe(col_index) ; + } + + bool test = last_row_value != current_matrix[current_row] ; + return test ; +} + +__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; +} + +inline +uint8_t matrix_get_row(uint8_t row) { + return matrix[row]; +} + +void matrix_init(void) { + init_led() ; + init_rows() ; + init_cols() ; + init_data() ; + init_strobe() ; + + // initialize matrix state: all keys off + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + matrix[i] = 0; +# if (DEBOUNCING_DELAY > 0) + matrix_debounce [i] = 0; +# endif + } + + matrix_init_quantum() ; +} + +uint8_t matrix_scan(void) { + for ( uint8_t current_row = 0; current_row < MATRIX_ROWS; ++current_row ) { +# if (DEBOUNCING_DELAY > 0) + bool matrix_changed = matrix_read(matrix_debounce, current_row); + + if (matrix_changed) { + debouncing = true ; + debouncing_time = timer_read(); + } + +# else + matrix_read(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_debounce[i]; + } + debouncing = false; + } +# endif + + matrix_scan_quantum(); + return 1; +} + +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"); + } +} |