231 lines
6.9 KiB
C
231 lines
6.9 KiB
C
/*
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Copyright 2021 mtei
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// clang-format off
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#ifndef readPort
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# include "gpio_extr.h"
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#endif
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#include "atomic_util.h"
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#include "util.h"
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#include "matrix.h"
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#include "matrix_extr.h"
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#include "debounce.h"
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#define ALWAYS_INLINE inline __attribute__((always_inline))
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#define NO_INLINE __attribute__((noinline))
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#define LOCAL_FUNC static
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#define LOCAL_DATA static
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#ifndef _BV
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# define _BV(bit) (1 << (bit))
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#endif
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#ifndef MATRIX_DEBUG_PIN
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# define MATRIX_DEBUG_PIN_INIT()
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# define MATRIX_DEBUG_SCAN_START()
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# define MATRIX_DEBUG_SCAN_END()
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# define MATRIX_DEBUG_DELAY_START()
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# define MATRIX_DEBUG_DELAY_END()
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# define MATRIX_DEBUG_GAP()
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#else
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# define MATRIX_DEBUG_GAP() asm volatile("nop \n nop":::"memory")
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#endif
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typedef uint16_t port_width_t;
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#if MATRIX_TYPE == DIRECT_SWITCH || MATRIX_TYPE == DIODE_COL2ROW
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# define MATRIX_LINES MATRIX_ROWS
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typedef matrix_row_t matrix_line_t;
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#endif
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#if MATRIX_TYPE == DIODE_ROW2COL
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# define MATRIX_LINES MATRIX_COLS
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typedef matrix_col_t matrix_line_t;
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#endif
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typedef struct _port_descriptor {
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int device;
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pin_t port;
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} port_descriptor;
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/* matrix state(1:on, 0:off) */
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extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
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extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
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#define setPortBitOutput_writeLow(port, bit) \
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do { setPortBitOutput(port, bit); writePortBitLow(port, bit); } while(0)
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#define setPortBitOutput_writeLow_atomic(port, bit) \
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do { ATOMIC_BLOCK_FORCEON { setPortBitOutput_writeLow(port, bit); } } while(0)
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#define setPortBitInputHigh_atomic(port, bit) \
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do { ATOMIC_BLOCK_FORCEON { setPortBitInputHigh(port, bit); } } while(0)
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#if defined(MATRIX_IN_PORTS) && defined(MATRIX_IN_PINS)
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# include "matrix_config_expand.c"
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#else
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# error matrix.c need defined MATRIX_IN_PORTS and MATRIX_IN_PINS
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#endif
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LOCAL_FUNC
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void unselect_output(uint8_t out_index) {
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unselect_output_inline(out_index);
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}
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LOCAL_FUNC
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void init_output_ports(void) {
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for (int i = 0; i < END_outpin_index; i++) {
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unselect_output(i);
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}
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}
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LOCAL_FUNC
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void init_all_ports(void) {
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init_input_ports();
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init_output_ports();
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init_inport_mask();
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init_extension();
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}
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LOCAL_FUNC ALWAYS_INLINE void select_line_and_read_input_ports(uint8_t current_line, port_width_t port_buffer[NUM_OF_INPUT_PORTS]);
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LOCAL_FUNC void select_line_and_read_input_ports(uint8_t current_line, port_width_t port_buffer[NUM_OF_INPUT_PORTS]) {
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// Select row (or col)
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select_output(current_line);
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matrix_output_select_delay();
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// Read ports
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read_all_input_ports(port_buffer, false);
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// Unselect row (or col)
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unselect_output_inline(current_line);
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}
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LOCAL_FUNC ALWAYS_INLINE void read_matrix_line(matrix_line_t phy_matrix[], uint8_t current_line);
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#if MATRIX_TYPE == DIODE_ROW2COL || MATRIX_TYPE == DIODE_COL2ROW
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LOCAL_FUNC void read_matrix_line(matrix_line_t phy_matrix[], uint8_t current_line) {
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// Start with a clear matrix row
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matrix_line_t current_line_value = 0;
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port_width_t port_buffer[NUM_OF_INPUT_PORTS];
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#ifdef MATRIX_GPIO_NEED_SEPARATE_ATOMIC
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select_line_and_read_input_ports(current_line, port_buffer);
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#else
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ATOMIC_BLOCK_FORCEON {
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select_line_and_read_input_ports(current_line, port_buffer);
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}
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#endif
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// Build row (or col)
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current_line_value = build_matrix_line(port_buffer);
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// Wait signal raise up
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if (current_line_value) {
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MATRIX_DEBUG_DELAY_START();
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wait_unselect_done();
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MATRIX_DEBUG_DELAY_END();
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}
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phy_matrix[current_line] = current_line_value;
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}
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#endif // MATRIX_TYPE == DIODE_ROW2COL || MATRIX_TYPE == DIODE_COL2ROW
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#if MATRIX_TYPE == DIRECT_SWITCH
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LOCAL_FUNC void read_matrix_line(matrix_line_t phy_matrix[], uint8_t current_line) {
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port_width_t port_buffer[NUM_OF_INPUT_PORTS];
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if (current_line != 0) {
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return;
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}
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for (uint8_t i = 0; i < MATRIX_LINES; i++) {
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phy_matrix[i] = 0;
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}
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read_all_input_ports(port_buffer, false);
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// Build matrix
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build_matrix_direct(port_buffer, phy_matrix);
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}
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#endif // MATRIX_TYPE == DIRECT_SWITCH
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void matrix_init(void) {
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// initialize key pins
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init_all_ports();
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// initialize matrix state: all keys off
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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raw_matrix[i] = 0;
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matrix[i] = 0;
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}
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debounce_init(MATRIX_ROWS);
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matrix_init_kb();
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}
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uint8_t matrix_scan(void) {
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matrix_line_t phy_matrix[MATRIX_LINES];
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MATRIX_DEBUG_PIN_INIT();
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MATRIX_DEBUG_SCAN_START();
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// read I/O port to phy_matrix[] (physical matrix)
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//select line, read inputs
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for (uint8_t current_line = 0; current_line < MATRIX_LINES; current_line++) {
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read_matrix_line(phy_matrix, current_line);
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}
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MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP(); MATRIX_DEBUG_SCAN_START();
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bool changed = false;
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#if MATRIX_TYPE == DIRECT_SWITCH || MATRIX_TYPE == DIODE_COL2ROW
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// copy phy_matrix[] to raw_matrix[]
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for (uint8_t current_line = 0; current_line < MATRIX_ROWS; current_line++) {
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if (raw_matrix[current_line] != phy_matrix[current_line]) {
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changed = true;
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raw_matrix[current_line] = phy_matrix[current_line];
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}
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}
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#endif
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#if MATRIX_TYPE == DIODE_ROW2COL
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// transpose phy_matrix[] to raw_matrix[]
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matrix_row_t trans_matrix[MATRIX_ROWS];
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for (uint8_t i = 0; i < MATRIX_ROWS; i++ ) {
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trans_matrix[i] = 0;
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}
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for (uint8_t src_line = 0; src_line < MATRIX_LINES; src_line++) {
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matrix_line_t src_line_data = phy_matrix[src_line];
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matrix_row_t dist_bit = MATRIX_ROW_SHIFTER << src_line;
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for (uint8_t dist_rows = 0; dist_rows < MATRIX_ROWS; dist_rows++) {
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if ((src_line_data & 1) == 1) {
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trans_matrix[dist_rows] |= dist_bit;
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}
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src_line_data >>= 1;
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}
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}
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for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
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if (raw_matrix[current_row] != trans_matrix[current_row]) {
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changed = true;
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raw_matrix[current_row] = trans_matrix[current_row];
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}
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}
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#endif
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MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP(); MATRIX_DEBUG_SCAN_START();
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// debounce raw_matrix[] to matrix[]
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debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
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MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP();
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MATRIX_DEBUG_SCAN_START();
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matrix_scan_kb();
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MATRIX_DEBUG_SCAN_END();
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return (uint8_t)changed;
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}
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