244 lines
6.9 KiB
C
244 lines
6.9 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include "util.h"
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#include "matrix.h"
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#include "debounce.h"
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#include "quantum.h"
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#ifdef DIRECT_PINS
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static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
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#elif ((DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)) && !defined(MULTIPLEX_PINS)
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static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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#endif
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#ifdef MULTIPLEX_PINS
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static const uint8_t select_pins[MULTIPLEX] = MULTIPLEX_PINS;
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#if (DIODE_DIRECTION == ROW2COL)
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static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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#else
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static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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#endif
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#endif
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// matrix code
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#ifdef DIRECT_PINS
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static void init_pins(void) {
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for (int row = 0; row < MATRIX_ROWS; row++) {
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for (int col = 0; col < MATRIX_COLS; col++) {
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pin_t pin = direct_pins[row][col];
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if (pin != NO_PIN) {
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setPinInputHigh(pin);
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}
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}
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}
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}
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
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// Start with a clear matrix row
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matrix_row_t current_row_value = 0;
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for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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pin_t pin = direct_pins[current_row][col_index];
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if (pin != NO_PIN) {
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current_row_value |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
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}
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}
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// If the row has changed, store the row and return the changed flag.
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if (current_matrix[current_row] != current_row_value) {
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current_matrix[current_row] = current_row_value;
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return true;
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}
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return false;
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}
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#elif defined(DIODE_DIRECTION)
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# if (DIODE_DIRECTION == COL2ROW)
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# if defined(MULTIPLEX_PINS)
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static void select_row(uint8_t row) {
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for (uint8_t select = 0; select < MULTIPLEX; select++) {
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writePin(select_pins[select], (row_pins[row] & (1 << select)));
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}
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}
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static void init_pins(void) {
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for (uint8_t select = 0; select < MULTIPLEX; select++) {
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setPinOutput(select_pins[select]);
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}
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for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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setPinInputHigh(col_pins[x]);
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}
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}
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# else
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static void select_row(uint8_t row) {
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setPinOutput(row_pins[row]);
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writePinLow(row_pins[row]);
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}
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static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
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static void unselect_rows(void) {
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for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
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setPinInputHigh(row_pins[x]);
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}
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}
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static void init_pins(void) {
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unselect_rows();
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for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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setPinInputHigh(col_pins[x]);
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}
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}
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# endif
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
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// Select row and wait for row selecton to stabilize
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select_row(current_row);
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matrix_io_delay();
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# if defined(PORTSCAN)
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uint8_t port_state = ~PINx_ADDRESS(PORTSCAN) & PORTSCAN_PINS;
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# ifndef MULTIPLEX_PINS
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unselect_row(current_row);
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# endif
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if (current_matrix[current_row] != port_state) {
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current_matrix[current_row] = port_state;
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return true;
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}
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return false;
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# else
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matrix_row_t current_row_value = 0;
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// For each col...
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for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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// Select the col pin to read (active low)
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uint8_t pin_state = readPin(col_pins[col_index]);
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// Populate the matrix row with the state of the col pin
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current_row_value |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
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}
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# ifndef MULTIPLEX_PINS
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// Unselect row
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unselect_row(current_row);
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# endif
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// If the row has changed, store the row and return the changed flag.
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if (current_matrix[current_row] != current_row_value) {
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current_matrix[current_row] = current_row_value;
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return true;
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}
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return false;
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# endif
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}
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# elif (DIODE_DIRECTION == ROW2COL)
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# if defined(MULTIPLEX_PINS)
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static void select_col(uint8_t col) {
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for (uint8_t select = 0; select < MULTIPLEX; select++) {
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writePin(select_pins[select], col_pins[col] & (1 << select));
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}
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matrix_io_delay();
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}
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static void init_pins(void) {
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for (uint8_t sel_index = 0; sel_index < MULTIPLEX; sel_index++) {
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setPinOutput(select_pins[sel_index]);
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}
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for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
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setPinInputHigh(row_pins[x]);
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}
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}
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# else
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static void select_col(uint8_t col) {
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setPinOutput(col_pins[col]);
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writePinLow(col_pins[col]);
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}
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static void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); }
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static void unselect_cols(void) {
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for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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setPinInputHigh(col_pins[x]);
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}
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}
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static void init_pins(void) {
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unselect_cols();
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for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
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setPinInputHigh(row_pins[x]);
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}
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}
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# endif
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static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
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bool matrix_changed = false;
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// Select col and wait for col selecton to stabilize
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select_col(current_col);
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matrix_io_delay();
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// For each row...
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for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
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// Store last value of row prior to reading
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matrix_row_t last_row_value = current_matrix[row_index];
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matrix_row_t current_row_value = last_row_value;
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// Check row pin state
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if (readPin(row_pins[row_index]) == 0) {
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// Pin LO, set col bit
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current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
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} else {
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// Pin HI, clear col bit
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current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
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}
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// Determine if the matrix changed state
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if ((last_row_value != current_row_value)) {
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matrix_changed |= true;
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current_matrix[row_index] = current_row_value;
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}
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}
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// Unselect col
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# ifndef MULTIPLEX_PINS
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unselect_col(current_col);
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# endif
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return matrix_changed;
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}
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# else
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# error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
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# endif
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#else
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# error DIODE_DIRECTION is not defined!
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#endif
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void matrix_init_custom(void) {
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// initialize key pins
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init_pins();
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}
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uint8_t matrix_scan_custom(matrix_row_t current_matrix[]) {
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bool changed = false;
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#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
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// Set row, read cols
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for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
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changed |= read_cols_on_row(current_matrix, current_row);
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}
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#elif (DIODE_DIRECTION == ROW2COL)
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// Set col, read rows
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for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
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changed |= read_rows_on_col(current_matrix, current_col);
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}
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#endif
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return changed;
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} |