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qmk_firmware/keyboards/redscarf_iiplus/verc/matrix.c

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/*
Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
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 "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#if (MATRIX_COLS <= 8)
# define print_matrix_header() print("\nr/c 01234567\n")
# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
# define ROW_SHIFTER ((uint8_t)1)
#elif (MATRIX_COLS <= 16)
# define print_matrix_header() print("\nr/c 0123456789ABCDEF\n")
# define print_matrix_row(row) print_bin_reverse16(matrix_get_row(row))
# define ROW_SHIFTER ((uint16_t)1)
#elif (MATRIX_COLS <= 32)
# define print_matrix_header() print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
# define print_matrix_row(row) print_bin_reverse32(matrix_get_row(row))
# define ROW_SHIFTER ((uint32_t)1)
#endif
#ifdef MATRIX_MASKED
extern const matrix_row_t matrix_mask[];
#endif
#ifdef DIRECT_PINS
static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
#elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
// static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
#endif
/* matrix state(1:on, 0:off) */
static matrix_row_t raw_matrix[MATRIX_ROWS]; //raw values
static matrix_row_t matrix[MATRIX_ROWS]; //debounced values
__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
bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix[row] & ((matrix_row_t)1<<col));
}
inline
matrix_row_t matrix_get_row(uint8_t row)
{
// Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
// switch blocker installed and the switch is always pressed.
#ifdef MATRIX_MASKED
return matrix[row] & matrix_mask[row];
#else
return matrix[row];
#endif
}
void matrix_print(void)
{
print_matrix_header();
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
print_hex8(row); print(": ");
print_matrix_row(row);
print("\n");
}
}
#ifdef DIRECT_PINS
static void init_pins(void) {
for (int row = 0; row < MATRIX_ROWS; row++) {
for (int col = 0; col < MATRIX_COLS; col++) {
pin_t pin = direct_pins[row][col];
if (pin != NO_PIN) {
gpio_set_pin_input_high(pin);
}
}
}
}
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
matrix_row_t last_row_value = current_matrix[current_row];
current_matrix[current_row] = 0;
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
pin_t pin = direct_pins[current_row][col_index];
if (pin != NO_PIN) {
current_matrix[current_row] |= gpio_read_pin(pin) ? 0 : (ROW_SHIFTER << col_index);
}
}
return (last_row_value != current_matrix[current_row]);
}
#elif (DIODE_DIRECTION == COL2ROW)
/* Rows 0 - 5
* These rows use a 74HC237D 3 to 8 bit demultiplexer.
* C B A
* row / pin: PB0 PB1 PB2
* 0: 0 0 0
* 1: 0 0 1
* 2: 0 1 0
* 3: 0 1 1
* 4: 1 0 0
* 5: 1 0 1
*/
static void select_row(uint8_t col)
{
switch (col) {
case 0:
gpio_write_pin_low(B0);
gpio_write_pin_low(B1);
gpio_write_pin_low(B2);
break;
case 1:
gpio_write_pin_low(B0);
gpio_write_pin_low(B1);
break;
case 2:
gpio_write_pin_low(B0);
gpio_write_pin_low(B2);
break;
case 3:
gpio_write_pin_low(B0);
break;
case 4:
gpio_write_pin_low(B1);
gpio_write_pin_low(B2);
break;
case 5:
gpio_write_pin_low(B1);
break;
}
}
static void unselect_row(uint8_t col)
{
switch (col) {
case 0:
gpio_write_pin_high(B0);
gpio_write_pin_high(B1);
gpio_write_pin_high(B2);
break;
case 1:
gpio_write_pin_high(B0);
gpio_write_pin_high(B1);
break;
case 2:
gpio_write_pin_high(B0);
gpio_write_pin_high(B2);
break;
case 3:
gpio_write_pin_high(B0);
break;
case 4:
gpio_write_pin_high(B1);
gpio_write_pin_high(B2);
break;
case 5:
gpio_write_pin_high(B1);
break;
}
}
static void unselect_rows(void)
{
gpio_set_pin_output(B0);
gpio_set_pin_output(B1);
gpio_set_pin_output(B2);
// make all pins high to select Y7, nothing is connected to that (otherwise the first row will act weird)
gpio_write_pin_high(B0);
gpio_write_pin_high(B1);
gpio_write_pin_high(B2);
}
static void init_pins(void) {
unselect_rows();
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
gpio_set_pin_input_high(col_pins[x]);
}
}
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
{
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[current_row];
// Clear data in matrix row
current_matrix[current_row] = 0;
// Select row and wait for row selecton to stabilize
select_row(current_row);
wait_us(30);
// For each col...
for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
// Select the col pin to read (active low)
uint8_t pin_state = gpio_read_pin(col_pins[col_index]);
// Populate the matrix row with the state of the col pin
current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
}
// Unselect row
unselect_row(current_row);
return (last_row_value != current_matrix[current_row]);
}
#elif (DIODE_DIRECTION == ROW2COL)
static void select_col(uint8_t col)
{
gpio_set_pin_output(col_pins[col]);
gpio_write_pin_low(col_pins[col]);
}
static void unselect_col(uint8_t col)
{
gpio_set_pin_input_high(col_pins[col]);
}
static void unselect_cols(void)
{
for(uint8_t x = 0; x < MATRIX_COLS; x++) {
gpio_set_pin_input_high(col_pins[x]);
}
}
static void init_pins(void) {
unselect_cols();
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
gpio_set_pin_input_high(row_pins[x]);
}
}
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
{
bool matrix_changed = false;
// Select col and wait for col selecton to stabilize
select_col(current_col);
wait_us(30);
// For each row...
for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
{
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[row_index];
// Check row pin state
if (gpio_read_pin(row_pins[row_index]) == 0)
{
// Pin LO, set col bit
current_matrix[row_index] |= (ROW_SHIFTER << current_col);
}
else
{
// Pin HI, clear col bit
current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
}
// Determine if the matrix changed state
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
{
matrix_changed = true;
}
}
// Unselect col
unselect_col(current_col);
return matrix_changed;
}
#endif
void matrix_init(void) {
// initialize key pins
init_pins();
// 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_kb();
}
uint8_t matrix_scan(void)
{
bool changed = false;
#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
// Set row, read cols
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
changed |= read_cols_on_row(raw_matrix, current_row);
}
#elif (DIODE_DIRECTION == ROW2COL)
// Set col, read rows
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
changed |= read_rows_on_col(raw_matrix, current_col);
}
#endif
debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
matrix_scan_kb();
return 1;
}
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