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qmk_firmware/keyboards/zsa/voyager/matrix.c

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// Copyright 2023 ZSA Technology Labs, Inc <@zsa>
// Copyright 2023 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
// SPDX-License-Identifier: GPL-2.0-or-later
#include <stdint.h>
#include "voyager.h"
#include "mcp23018.h"
#pragma GCC push_options
#pragma GCC optimize("-O3")
extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
static matrix_row_t raw_matrix_right[MATRIX_COLS];
#define MCP_ROWS_PER_HAND (MATRIX_ROWS / 2)
#ifndef VOYAGER_I2C_TIMEOUT
# define VOYAGER_I2C_TIMEOUT 100
#endif
// Delay between each i2c io expander ops (in MCU cycles)
#ifndef IO_EXPANDER_OP_DELAY
# define IO_EXPANDER_OP_DELAY 500
#endif
extern bool mcp23018_leds[2];
extern bool is_launching;
static uint16_t mcp23018_reset_loop;
uint8_t mcp23018_errors;
bool io_expander_ready(void) {
uint8_t tx;
return mcp23018_readPins(MCP23018_DEFAULT_ADDRESS, mcp23018_PORTA, &tx);
}
void matrix_init_custom(void) {
// outputs
gpio_set_pin_output(B10);
gpio_set_pin_output(B11);
gpio_set_pin_output(B12);
gpio_set_pin_output(B13);
gpio_set_pin_output(B14);
gpio_set_pin_output(B15);
// inputs
gpio_set_pin_input_low(A0);
gpio_set_pin_input_low(A1);
gpio_set_pin_input_low(A2);
gpio_set_pin_input_low(A3);
gpio_set_pin_input_low(A6);
gpio_set_pin_input_low(A7);
gpio_set_pin_input_low(B0);
mcp23018_init(MCP23018_DEFAULT_ADDRESS);
mcp23018_errors += !mcp23018_set_config(MCP23018_DEFAULT_ADDRESS, mcp23018_PORTA, 0b00000000);
mcp23018_errors += !mcp23018_set_config(MCP23018_DEFAULT_ADDRESS, mcp23018_PORTB, 0b00111111);
if (!mcp23018_errors) {
is_launching = true;
}
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool changed = false;
// Attempt to reset the mcp23018 if it's not initialized
if (mcp23018_errors) {
if (++mcp23018_reset_loop > 0x1FFF) {
if (io_expander_ready()) {
// If we managed to initialize the mcp23018 - we need to reinitialize the matrix / layer state. During an electric discharge the i2c peripherals might be in a weird state. Giving a delay and resetting the MCU allows to recover from this.
wait_ms(200);
mcu_reset();
}
}
}
// Scanning left and right side of the keyboard for key presses.
// Left side is scanned by reading the gpio pins directly, right side is scanned by reading the mcp23018 registers.
matrix_row_t data = 0;
for (uint8_t row = 0; row <= MCP_ROWS_PER_HAND; row++) {
// strobe row
switch (row) {
case 0:
gpio_write_pin_high(B10);
break;
case 1:
gpio_write_pin_high(B11);
break;
case 2:
gpio_write_pin_high(B12);
break;
case 3:
gpio_write_pin_high(B13);
break;
case 4:
gpio_write_pin_high(B14);
break;
case 5:
gpio_write_pin_high(B15);
break;
case 6:
break; // Left hand has 6 rows
}
// Selecting the row on the right side of the keyboard.
if (!mcp23018_errors) {
// select row
mcp23018_errors += !mcp23018_set_output(MCP23018_DEFAULT_ADDRESS, mcp23018_PORTA, 0b01111111 & ~(1 << (row)));
mcp23018_errors += !mcp23018_set_output(MCP23018_DEFAULT_ADDRESS, mcp23018_PORTB, ((uint8_t)!mcp23018_leds[1] << 6) | ((uint8_t)!mcp23018_leds[0] << 7));
}
// Reading the left side of the keyboard.
if (row < MCP_ROWS_PER_HAND) {
// i2c comm incur enough wait time
if (mcp23018_errors) {
// need wait to settle pin state
matrix_io_delay();
}
// read col data
2024-05-24 20:38:57 +02:00
data = ((gpio_read_pin(A0) << 0) | (gpio_read_pin(A1) << 1) | (gpio_read_pin(A2) << 2) | (gpio_read_pin(A3) << 3) | (gpio_read_pin(A6) << 4) | (gpio_read_pin(A7) << 5) | (gpio_read_pin(B0) << 6));
// unstrobe row
switch (row) {
case 0:
gpio_write_pin_low(B10);
break;
case 1:
gpio_write_pin_low(B11);
break;
case 2:
gpio_write_pin_low(B12);
break;
case 3:
gpio_write_pin_low(B13);
break;
case 4:
gpio_write_pin_low(B14);
break;
case 5:
gpio_write_pin_low(B15);
break;
case 6:
break;
}
if (current_matrix[row] != data) {
current_matrix[row] = data;
changed = true;
}
}
// Reading the right side of the keyboard.
if (!mcp23018_errors) {
for (uint16_t i = 0; i < IO_EXPANDER_OP_DELAY; i++) {
__asm__("nop");
}
uint8_t rx;
mcp23018_errors += !mcp23018_readPins(MCP23018_DEFAULT_ADDRESS, mcp23018_PORTB, &rx);
data = ~(rx & 0b00111111);
for (uint16_t i = 0; i < IO_EXPANDER_OP_DELAY; i++) {
__asm__("nop");
}
} else {
data = 0;
}
if (raw_matrix_right[row] != data) {
raw_matrix_right[row] = data;
changed = true;
}
}
for (uint8_t row = 0; row < MCP_ROWS_PER_HAND; row++) {
current_matrix[11 - row] = 0;
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
current_matrix[11 - row] |= ((raw_matrix_right[6 - col] & (1 << row) ? 1 : 0) << col);
}
}
return changed;
}
// DO NOT REMOVE
// Needed for proper wake/sleep
void matrix_power_up(void) {
bool temp_launching = is_launching;
matrix_init_custom();
is_launching = temp_launching;
if (!temp_launching) {
STATUS_LED_1(false);
STATUS_LED_2(false);
STATUS_LED_3(false);
STATUS_LED_4(false);
}
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
}
}
bool is_transport_connected(void) {
return (bool)(mcp23018_errors == 0);
}
#pragma GCC pop_options