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// Copyright 2023 Cameron Varley (@RustedAperture)
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* scan matrix
*/
#include <stdint.h>
#include <stdbool.h>
#include "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#include "quantum.h"
/* matrix state(1:on, 0:off) */
extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
#define MATRIX_ROW_SHIFTER ((matrix_row_t)1)
static inline void setPinOutput_writeLow(pin_t pin) {
ATOMIC_BLOCK_FORCEON {
setPinOutput(pin);
writePinLow(pin);
}
}
static inline void setPinOutput_writeHigh(pin_t pin) {
ATOMIC_BLOCK_FORCEON {
setPinOutput(pin);
writePinHigh(pin);
}
}
static inline void setPinInputHigh_atomic(pin_t pin) {
ATOMIC_BLOCK_FORCEON {
setPinInputHigh(pin);
}
}
static inline uint8_t readMatrixPin(pin_t pin) {
if (pin != NO_PIN) {
return readPin(pin);
} else {
return 1;
}
}
static bool select_col(uint8_t col) {
pin_t pin = col_pins[col];
if (pin != NO_PIN) {
setPinOutput_writeLow(pin);
return true;
}
return false;
}
static void unselect_col(uint8_t col) {
pin_t pin = col_pins[col];
if (pin != NO_PIN) {
# ifdef MATRIX_UNSELECT_DRIVE_HIGH
setPinOutput_writeHigh(pin);
# else
setPinInputHigh_atomic(pin);
# endif
}
}
static void unselect_cols(void) {
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
unselect_col(x);
}
}
__attribute__((weak)) void matrix_init_custom(void) {
unselect_cols();
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
if (row_pins[x] != NO_PIN) {
setPinInputHigh_atomic(row_pins[x]);
}
}
setPinInputHigh_atomic(B8);
}
__attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col, matrix_row_t row_shifter) { // Start with a clear matrix row
bool key_pressed = false;
// Select col
if (!select_col(current_col)) { // select col
return; // skip NO_PIN col
}
matrix_output_select_delay();
// For each row...
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Check row pin state
if (current_col == 3 && row_index == 2 && readMatrixPin(B8) == 1) {
current_matrix[row_index] |= row_shifter;
key_pressed = !readMatrixPin(B8);
} else if (readMatrixPin(row_pins[row_index]) == 0) {
// Pin LO, set col bit
current_matrix[row_index] |= row_shifter;
key_pressed = true;
} else {
// Pin HI, clear col bit
current_matrix[row_index] &= ~row_shifter;
}
}
// Unselect col
unselect_col(current_col);
matrix_output_unselect_delay(current_col, key_pressed); // wait for all Row signals to go HIGH
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
static matrix_row_t temp_matrix[MATRIX_ROWS] = {0};
matrix_row_t row_shifter = MATRIX_ROW_SHIFTER;
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
matrix_read_rows_on_col(temp_matrix, current_col, row_shifter);
}
bool changed = memcmp(current_matrix, temp_matrix, sizeof(temp_matrix)) != 0;
if (changed) {
memcpy(current_matrix, temp_matrix, sizeof(temp_matrix));
}
return changed;
}
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