201 lines
6.5 KiB
C
201 lines
6.5 KiB
C
/* Copyright 2021 QMK
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "split_util.h"
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#include "matrix.h"
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#include "keyboard.h"
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#include "config.h"
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#include "timer.h"
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#include "transport.h"
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#include "quantum.h"
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#include "wait.h"
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#include "usb_util.h"
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#ifdef EE_HANDS
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# include "eeconfig.h"
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#endif
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#if defined(RGBLIGHT_ENABLE) && defined(RGBLED_SPLIT)
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# include "rgblight.h"
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#endif
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#ifndef SPLIT_USB_TIMEOUT
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# define SPLIT_USB_TIMEOUT 2000
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#endif
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#ifndef SPLIT_USB_TIMEOUT_POLL
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# define SPLIT_USB_TIMEOUT_POLL 10
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#endif
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// Max number of consecutive failed communications (one per scan cycle) before the communication is seen as disconnected.
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// Set to 0 to disable the disconnection check altogether.
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#ifndef SPLIT_MAX_CONNECTION_ERRORS
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# define SPLIT_MAX_CONNECTION_ERRORS 10
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#endif // SPLIT_MAX_CONNECTION_ERRORS
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// How long (in milliseconds) to block all connection attempts after the communication has been flagged as disconnected.
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// One communication attempt will be allowed everytime this amount of time has passed since the last attempt. If that attempt succeeds, the communication is seen as working again.
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// Set to 0 to disable communication throttling while disconnected
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#ifndef SPLIT_CONNECTION_CHECK_TIMEOUT
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# define SPLIT_CONNECTION_CHECK_TIMEOUT 500
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#endif // SPLIT_CONNECTION_CHECK_TIMEOUT
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static uint8_t connection_errors = 0;
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volatile bool isLeftHand = true;
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#if defined(SPLIT_USB_DETECT)
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_Static_assert((SPLIT_USB_TIMEOUT / SPLIT_USB_TIMEOUT_POLL) <= UINT16_MAX, "Please lower SPLIT_USB_TIMEOUT and/or increase SPLIT_USB_TIMEOUT_POLL.");
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static bool usbIsActive(void) {
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for (uint16_t i = 0; i < (SPLIT_USB_TIMEOUT / SPLIT_USB_TIMEOUT_POLL); i++) {
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// This will return true if a USB connection has been established
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if (usb_connected_state()) {
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return true;
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}
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wait_ms(SPLIT_USB_TIMEOUT_POLL);
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}
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return false;
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}
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#else
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static inline bool usbIsActive(void) {
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return usb_vbus_state();
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}
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#endif
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#ifdef SPLIT_HAND_MATRIX_GRID
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void matrix_io_delay(void);
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static uint8_t peek_matrix_intersection(pin_t out_pin, pin_t in_pin) {
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setPinInputHigh(in_pin);
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setPinOutput(out_pin);
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writePinLow(out_pin);
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// It's almost unnecessary, but wait until it's down to low, just in case.
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wait_us(1);
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uint8_t pin_state = readPin(in_pin);
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// Set out_pin to a setting that is less susceptible to noise.
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setPinInputHigh(out_pin);
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matrix_io_delay(); // Wait for the pull-up to go HIGH.
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return pin_state;
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}
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#endif
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__attribute__((weak)) bool is_keyboard_left(void) {
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#if defined(SPLIT_HAND_PIN)
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// Test pin SPLIT_HAND_PIN for High/Low, if low it's right hand
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setPinInput(SPLIT_HAND_PIN);
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# ifdef SPLIT_HAND_PIN_LOW_IS_LEFT
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return !readPin(SPLIT_HAND_PIN);
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# else
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return readPin(SPLIT_HAND_PIN);
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# endif
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#elif defined(SPLIT_HAND_MATRIX_GRID)
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# ifdef SPLIT_HAND_MATRIX_GRID_LOW_IS_RIGHT
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return peek_matrix_intersection(SPLIT_HAND_MATRIX_GRID);
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# else
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return !peek_matrix_intersection(SPLIT_HAND_MATRIX_GRID);
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# endif
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#elif defined(EE_HANDS)
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return eeconfig_read_handedness();
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#elif defined(MASTER_RIGHT)
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return !is_keyboard_master();
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#endif
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return is_keyboard_master();
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}
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__attribute__((weak)) bool is_keyboard_master(void) {
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static enum { UNKNOWN, MASTER, SLAVE } usbstate = UNKNOWN;
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// only check once, as this is called often
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if (usbstate == UNKNOWN) {
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usbstate = usbIsActive() ? MASTER : SLAVE;
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// Avoid NO_USB_STARTUP_CHECK - Disable USB as the previous checks seem to enable it somehow
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if (usbstate == SLAVE) {
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usb_disconnect();
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}
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}
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return (usbstate == MASTER);
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}
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// this code runs before the keyboard is fully initialized
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void split_pre_init(void) {
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isLeftHand = is_keyboard_left();
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#if defined(RGBLIGHT_ENABLE) && defined(RGBLED_SPLIT)
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uint8_t num_rgb_leds_split[2] = RGBLED_SPLIT;
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if (isLeftHand) {
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rgblight_set_clipping_range(0, num_rgb_leds_split[0]);
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} else {
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rgblight_set_clipping_range(num_rgb_leds_split[0], num_rgb_leds_split[1]);
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}
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#endif
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if (is_keyboard_master()) {
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#if defined(USE_I2C) && defined(SSD1306OLED)
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matrix_master_OLED_init();
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#endif
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transport_master_init();
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}
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}
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// this code runs after the keyboard is fully initialized
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// - avoids race condition during matrix_init_quantum where slave can start
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// receiving before the init process has completed
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void split_post_init(void) {
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if (!is_keyboard_master()) {
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transport_slave_init();
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}
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}
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bool is_transport_connected(void) {
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return connection_errors < SPLIT_MAX_CONNECTION_ERRORS;
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}
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bool transport_master_if_connected(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
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#if SPLIT_MAX_CONNECTION_ERRORS > 0 && SPLIT_CONNECTION_CHECK_TIMEOUT > 0
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// Throttle transaction attempts if target doesn't seem to be connected
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// Without this, a solo half becomes unusable due to constant read timeouts
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static uint16_t connection_check_timer = 0;
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const bool is_disconnected = !is_transport_connected();
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if (is_disconnected && timer_elapsed(connection_check_timer) < SPLIT_CONNECTION_CHECK_TIMEOUT) {
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return false;
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}
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#endif // SPLIT_MAX_CONNECTION_ERRORS > 0 && SPLIT_CONNECTION_CHECK_TIMEOUT > 0
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__attribute__((unused)) bool okay = transport_master(master_matrix, slave_matrix);
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#if SPLIT_MAX_CONNECTION_ERRORS > 0
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if (!okay) {
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if (connection_errors < UINT8_MAX) {
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connection_errors++;
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}
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# if SPLIT_CONNECTION_CHECK_TIMEOUT > 0
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bool connected = is_transport_connected();
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if (!connected) {
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connection_check_timer = timer_read();
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dprintln("Target disconnected, throttling connection attempts");
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}
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return connected;
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} else if (is_disconnected) {
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dprintln("Target connected");
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# endif // SPLIT_CONNECTION_CHECK_TIMEOUT > 0
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}
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connection_errors = 0;
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#endif // SPLIT_MAX_CONNECTION_ERRORS > 0
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return true;
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}
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