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/* Copyright 2022 @ Keychron (https://www.keychron.com)
*
* 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 "quantum.h"
#include "indicator.h"
#include "transport.h"
#define HC595_STCP B0
#define HC595_SHCP A1
#define HC595_DS A7
pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
extern indicator_config_t indicator_config;
static uint32_t power_on_indicator_timer_buffer;
extern bool bat_low_led_pin_state;
#define POWER_ON_LED_DURATION 3000
static inline void HC595_delay(uint16_t n) {
while (n-- > 0) {
asm volatile("nop" ::: "memory");
};
}
static void HC595_output(uint32_t data) {
uint8_t i;
uint8_t n = 1;
for (i = 0; i < (MATRIX_COLS + 3); i++) {
writePinLow(HC595_SHCP);
if (data & 0x1)
writePinHigh(HC595_DS);
else
writePinLow(HC595_DS);
data >>= 1;
HC595_delay(n);
writePinHigh(HC595_SHCP);
HC595_delay(n);
}
HC595_delay(n);
writePinLow(HC595_STCP);
HC595_delay(n);
writePinHigh(HC595_STCP);
}
static inline void setPinOutput_writeLow(pin_t pin) {
ATOMIC_BLOCK_FORCEON {
setPinOutput(pin);
writePinLow(pin);
}
}
static inline void setPinInput_high(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];
uint32_t value = 0;
if (pin != NO_PIN) {
setPinOutput_writeLow(pin);
return true;
} else {
if (power_on_indicator_timer_buffer) {
if (sync_timer_elapsed32(power_on_indicator_timer_buffer) > POWER_ON_LED_DURATION) {
power_on_indicator_timer_buffer = 0;
HC595_output((~(0x1 << (21 - col - 1))) & (7 << 0));
} else {
HC595_output((~(0x1 << (21 - col - 1))));
}
} else {
if (get_transport() == TRANSPORT_BLUETOOTH) {
if (indicator_config.value) {
if (indicator_config.value & 0x80) {
value = ~(0x1 << (21 - col - 1)) & ~(3 << 0);
HC595_output(value);
} else {
value = (~(0x1 << (21 - col - 1))) & ~(7 << 0);
HC595_output(value);
}
} else {
if (host_keyboard_led_state().caps_lock) {
value = (~(0x1 << (21 - col - 1))) & ~(5 << 0);
HC595_output(value);
} else {
value = (~(0x1 << (21 - col - 1))) & ~(7 << 0);
HC595_output(value);
}
}
if (bat_low_led_pin_state) {
HC595_output(value | (1 << 0));
}
} else {
if (host_keyboard_led_state().caps_lock) {
HC595_output((~(0x1 << (21 - col - 1))) & ~(5 << 0));
} else {
HC595_output((~(0x1 << (21 - col - 1))) & ~(7 << 0));
}
}
}
return true;
}
return false;
}
static void unselect_col(uint8_t col) {
pin_t pin = col_pins[col];
uint32_t value = 0;
if (pin != NO_PIN) {
#ifdef MATRIX_UNSELECT_DRIVE_HIGH
setPinOutput_writeHigh(pin);
#else
setPinInput_high(pin);
#endif
} else {
if (power_on_indicator_timer_buffer) {
if (sync_timer_elapsed32(power_on_indicator_timer_buffer) > POWER_ON_LED_DURATION) {
power_on_indicator_timer_buffer = 0;
HC595_output(0x1FFFFF & ~(7 << 0));
} else {
HC595_output(0x1FFFFF);
}
} else {
if (get_transport() == TRANSPORT_BLUETOOTH) {
if (indicator_config.value) {
if (indicator_config.value & 0x80) {
if (col == (MATRIX_COLS - 1)) {
value = 0x1FFFFF & ~(3 << 0);
HC595_output(value);
}
} else {
if (col == (MATRIX_COLS - 1)) {
if (col == (MATRIX_COLS - 1)) {
value = 0x1FFFFF & ~(7 << 0);
HC595_output(value);
}
}
}
} else {
if (host_keyboard_led_state().caps_lock) {
if (col == (MATRIX_COLS - 1)) {
if (col == (MATRIX_COLS - 1)) {
value = 0x1FFFFF & ~(5 << 0);
HC595_output(value);
}
}
} else {
if (col == (MATRIX_COLS - 1)) {
if (col == (MATRIX_COLS - 1)) {
value = 0x1FFFFF & ~(7 << 0);
HC595_output(value);
}
}
}
}
if (bat_low_led_pin_state) {
HC595_output(value | (1 << 0));
}
} else {
if (host_keyboard_led_state().caps_lock) {
if (col == (MATRIX_COLS - 1)) {
HC595_output(0x1FFFFF & ~(5 << 0));
}
} else {
if (col == (MATRIX_COLS - 1)) {
HC595_output(0x1FFFFF & ~(7 << 0));
}
}
}
}
}
}
static void unselect_cols(void) {
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
pin_t pin = col_pins[x];
if (pin != NO_PIN) {
#ifdef MATRIX_UNSELECT_DRIVE_HIGH
setPinOutput_writeHigh(pin);
#else
setPinInput_high(pin);
#endif
} else {
if (x == 0) {
HC595_output(0xFFFFFFFF);
power_on_indicator_timer_buffer = sync_timer_read32() | 1;
}
}
}
}
void select_all_cols(void) {
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
pin_t pin = col_pins[x];
if (pin != NO_PIN) {
setPinOutput_writeLow(pin);
} else {
if (x == 0) {
if (host_keyboard_led_state().caps_lock) {
HC595_output(0x00000000 | (2 << 0));
} else {
HC595_output(0x00000000);
}
}
}
}
}
void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
// Select col
if (!select_col(current_col)) { // select col
return; // skip NO_PIN col
}
HC595_delay(200);
// For each row...
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Check row pin state
if (readMatrixPin(row_pins[row_index]) == 0) {
// Pin LO, set col bit
current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col);
// key_pressed = true;
} else {
// Pin HI, clear col bit
current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
}
}
unselect_col(current_col);
HC595_delay(200);
}
void matrix_init_custom(void) {
setPinOutput(HC595_DS);
setPinOutput(HC595_STCP);
setPinOutput(HC595_SHCP);
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
if (row_pins[x] != NO_PIN) {
setPinInput_high(row_pins[x]);
}
}
unselect_cols();
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool matrix_has_changed = false;
matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
// Set col, read rows
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
matrix_read_rows_on_col(curr_matrix, current_col);
}
matrix_has_changed = memcmp(current_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
if (matrix_has_changed) memcpy(current_matrix, curr_matrix, sizeof(curr_matrix));
return matrix_has_changed;
}
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