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/*
Copyright 2021 mtei
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/>.
*/
// clang-format off
#include <stdint.h>
#include <stdbool.h>
#include <gpio.h>
#ifndef readPort
# include "gpio_extr.h"
#endif
#include "util.h"
#include "matrix.h"
#include "matrix_extr.h"
#include "debounce.h"
#include "quantum.h"
#define ALWAYS_INLINE inline __attribute__((always_inline))
#define NO_INLINE __attribute__((noinline))
#define LOCAL_FUNC static
#define LOCAL_DATA static
#ifndef _BV
# define _BV(bit) (1 << (bit))
#endif
#ifndef MATRIX_DEBUG_PIN
# define MATRIX_DEBUG_PIN_INIT()
# define MATRIX_DEBUG_SCAN_START()
# define MATRIX_DEBUG_SCAN_END()
# define MATRIX_DEBUG_DELAY_START()
# define MATRIX_DEBUG_DELAY_END()
# define MATRIX_DEBUG_GAP()
#else
# define MATRIX_DEBUG_GAP() asm volatile("nop \n nop":::"memory")
#endif
typedef uint16_t port_width_t;
#if MATRIX_TYPE == DIRECT_SWITCH || MATRIX_TYPE == DIODE_COL2ROW
# define MATRIX_LINES MATRIX_ROWS
typedef matrix_row_t matrix_line_t;
#endif
#if MATRIX_TYPE == DIODE_ROW2COL
# define MATRIX_LINES MATRIX_COLS
typedef matrix_col_t matrix_line_t;
#endif
typedef struct _port_descriptor {
int device;
pin_t port;
} port_descriptor;
/* matrix state(1:on, 0:off) */
extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
#define setPortBitOutput_writeLow(port, bit) \
do { setPortBitOutput(port, bit); writePortBitLow(port, bit); } while(0)
#define setPortBitOutput_writeLow_atomic(port, bit) \
do { ATOMIC_BLOCK_FORCEON { setPortBitOutput_writeLow(port, bit); } } while(0)
#define setPortBitInputHigh_atomic(port, bit) \
do { ATOMIC_BLOCK_FORCEON { setPortBitInputHigh(port, bit); } } while(0)
#if defined(MATRIX_IN_PORTS) && defined(MATRIX_IN_PINS)
# include "matrix_config_expand.c"
#else
# error matrix.c need defined MATRIX_IN_PORTS and MATRIX_IN_PINS
#endif
LOCAL_FUNC
void unselect_output(uint8_t out_index) {
unselect_output_inline(out_index);
}
LOCAL_FUNC
void init_output_ports(void) {
for (int i = 0; i < END_outpin_index; i++) {
unselect_output(i);
}
}
LOCAL_FUNC
void init_all_ports(void) {
init_input_ports();
init_output_ports();
init_inport_mask();
init_extension();
}
LOCAL_FUNC ALWAYS_INLINE void select_line_and_read_input_ports(uint8_t current_line, port_width_t port_buffer[NUM_OF_INPUT_PORTS]);
LOCAL_FUNC void select_line_and_read_input_ports(uint8_t current_line, port_width_t port_buffer[NUM_OF_INPUT_PORTS]) {
// Select row (or col)
select_output(current_line);
matrix_output_select_delay();
// Read ports
read_all_input_ports(port_buffer, false);
// Unselect row (or col)
unselect_output_inline(current_line);
}
LOCAL_FUNC ALWAYS_INLINE void read_matrix_line(matrix_line_t phy_matrix[], uint8_t current_line);
#if MATRIX_TYPE == DIODE_ROW2COL || MATRIX_TYPE == DIODE_COL2ROW
LOCAL_FUNC void read_matrix_line(matrix_line_t phy_matrix[], uint8_t current_line) {
// Start with a clear matrix row
matrix_line_t current_line_value = 0;
port_width_t port_buffer[NUM_OF_INPUT_PORTS];
#ifdef MATRIX_GPIO_NEED_SEPARATE_ATOMIC
select_line_and_read_input_ports(current_line, port_buffer);
#else
ATOMIC_BLOCK_FORCEON {
select_line_and_read_input_ports(current_line, port_buffer);
}
#endif
// Build row (or col)
current_line_value = build_matrix_line(port_buffer);
// Wait signal raise up
if (current_line_value) {
MATRIX_DEBUG_DELAY_START();
wait_unselect_done();
MATRIX_DEBUG_DELAY_END();
}
phy_matrix[current_line] = current_line_value;
}
#endif // MATRIX_TYPE == DIODE_ROW2COL || MATRIX_TYPE == DIODE_COL2ROW
#if MATRIX_TYPE == DIRECT_SWITCH
LOCAL_FUNC void read_matrix_line(matrix_line_t phy_matrix[], uint8_t current_line) {
port_width_t port_buffer[NUM_OF_INPUT_PORTS];
if (current_line != 0) {
return;
}
for (uint8_t i = 0; i < MATRIX_LINES; i++) {
phy_matrix[i] = 0;
}
read_all_input_ports(port_buffer, false);
// Build matrix
build_matrix_direct(port_buffer, phy_matrix);
}
#endif // MATRIX_TYPE == DIRECT_SWITCH
void matrix_init(void) {
// initialize key pins
init_all_ports();
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
raw_matrix[i] = 0;
matrix[i] = 0;
}
debounce_init(MATRIX_ROWS);
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
matrix_line_t phy_matrix[MATRIX_LINES];
MATRIX_DEBUG_PIN_INIT();
MATRIX_DEBUG_SCAN_START();
// read I/O port to phy_matrix[] (physical matrix)
//select line, read inputs
for (uint8_t current_line = 0; current_line < MATRIX_LINES; current_line++) {
read_matrix_line(phy_matrix, current_line);
}
MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP(); MATRIX_DEBUG_SCAN_START();
bool changed = false;
#if MATRIX_TYPE == DIRECT_SWITCH || MATRIX_TYPE == DIODE_COL2ROW
// copy phy_matrix[] to raw_matrix[]
for (uint8_t current_line = 0; current_line < MATRIX_ROWS; current_line++) {
if (raw_matrix[current_line] != phy_matrix[current_line]) {
changed = true;
raw_matrix[current_line] = phy_matrix[current_line];
}
}
#endif
#if MATRIX_TYPE == DIODE_ROW2COL
// transpose phy_matrix[] to raw_matrix[]
matrix_row_t trans_matrix[MATRIX_ROWS];
for (uint8_t i = 0; i < MATRIX_ROWS; i++ ) {
trans_matrix[i] = 0;
}
for (uint8_t src_line = 0; src_line < MATRIX_LINES; src_line++) {
matrix_line_t src_line_data = phy_matrix[src_line];
matrix_row_t dist_bit = MATRIX_ROW_SHIFTER << src_line;
for (uint8_t dist_rows = 0; dist_rows < MATRIX_ROWS; dist_rows++) {
if ((src_line_data & 1) == 1) {
trans_matrix[dist_rows] |= dist_bit;
}
src_line_data >>= 1;
}
}
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
if (raw_matrix[current_row] != trans_matrix[current_row]) {
changed = true;
raw_matrix[current_row] = trans_matrix[current_row];
}
}
#endif
MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP(); MATRIX_DEBUG_SCAN_START();
// debounce raw_matrix[] to matrix[]
debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP();
MATRIX_DEBUG_SCAN_START();
matrix_scan_quantum();
MATRIX_DEBUG_SCAN_END();
return (uint8_t)changed;
}
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