mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-05 17:30:56 +00:00
931c7539d2
* Basic support for Maltron DQz11N1G controller replacement. * Update keyboards/handwired/dqz11n1g/rules.mk * Rehost images to cubeupload.com. (They were previously hosted via github wiki) * Apply suggestions from noroadsleft code review * Update keyboards/handwired/dqz11n1g/dqz11n1g.h
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
|
|
Copyright (c) 2022 David Kuehling <dvdkhlng TA posteo TOD de>
|
|
|
|
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 <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
|
|
#include <avr/io.h>
|
|
|
|
#include "spi_master.h"
|
|
#include "quantum.h"
|
|
#include "matrix.h"
|
|
|
|
static pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
|
|
|
|
static void unselect_rows(void);
|
|
|
|
void matrix_init_custom(void) {
|
|
/* initialize row pins */
|
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
|
setPinOutput(row_pins[row]);
|
|
}
|
|
unselect_rows();
|
|
|
|
/* columns read via shift-register on SPI lines */
|
|
|
|
/* Enable SPI, Master, set clock rate fck/2. First bit already at Qh
|
|
* output before clock edge (CPHA=0). SN74HC165 shift register shifts
|
|
* on low-to-high transition (CPOL=1). Receive the LSB first (DORD=1).
|
|
*/
|
|
bool lsbFirst = true;
|
|
uint8_t mode = 2; /* CPOL=1, CPHA=0 */
|
|
uint16_t divisor = 16;
|
|
|
|
/* According to Atmega32U4 datasheet, PB0 *must* be set to output,
|
|
* otherwise it will interfere with SPI master operation. On pro-micro
|
|
* it's connected to a yellew LED. */
|
|
pin_t slavePin = PB0;
|
|
spi_init();
|
|
spi_start(slavePin, lsbFirst, mode, divisor);
|
|
|
|
/* Initialize pin controlling the shift register's SH/~LD pin */
|
|
setPinOutput(ROW_SHIFT_PIN);
|
|
}
|
|
|
|
static void select_row(uint8_t row) {
|
|
pin_t pin = row_pins[row];
|
|
if (pin != NO_PIN) {
|
|
writePinHigh(pin);
|
|
}
|
|
}
|
|
|
|
static void unselect_row(uint8_t row) {
|
|
pin_t pin = row_pins[row];
|
|
if (pin != NO_PIN) {
|
|
writePinLow(pin);
|
|
}
|
|
}
|
|
|
|
static void unselect_rows(void) {
|
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
|
unselect_row(row);
|
|
}
|
|
}
|
|
|
|
bool matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
|
|
/* Start with a clear matrix row */
|
|
matrix_row_t current_row_value = 0;
|
|
|
|
/* Set shift register SH/~LD pin to "load" mode */
|
|
writePinLow(ROW_SHIFT_PIN);
|
|
select_row(current_row);
|
|
matrix_output_select_delay();
|
|
|
|
/* Set shift register SH/~LD pin to "shift" mode */
|
|
writePinHigh(ROW_SHIFT_PIN);
|
|
|
|
/* For each octet of columns... */
|
|
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index += 8) {
|
|
spi_status_t read_result = spi_read();
|
|
if (read_result >= 0) {
|
|
/* only if SPI read successful: populate the matrix row with the
|
|
state of the 8 consecutive column bits */
|
|
current_row_value |= ((matrix_row_t)read_result << col_index);
|
|
}
|
|
}
|
|
|
|
/* Unselect row & wait for all columns signals to go high. */
|
|
unselect_row(current_row);
|
|
matrix_output_unselect_delay(current_row, current_row_value != 0);
|
|
|
|
/* Update row in matrix. */
|
|
if (current_row_value != current_matrix[current_row]) {
|
|
current_matrix[current_row] = current_row_value;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool matrix_scan_custom(matrix_row_t curr_matrix[]) {
|
|
bool changed = false;
|
|
|
|
/* set row, read cols */
|
|
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
|
|
changed |= matrix_read_cols_on_row(curr_matrix, current_row);
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-basic-offset:4
|
|
* fill-column: 76
|
|
* End:
|
|
*/
|