mirror of
https://github.com/qmk/qmk_firmware.git
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0ae20e7457
* Make solo half of split keyboards (more) usable. Using only one half of a split keyboard (that's using the split_common framework to communicate) is not a great experience, since several read timeouts per scan cycle cause an unusably slow scan rate. This change blocks all split communication attempts for 500 ms (configurable) after an error occurs, causing the scan rate to become at least _more_ usable, but might need some tweaking to work fully on most keyboards. One read timeout still needs to occur after the 500 ms has passed, and if that timeout isn't low enough, some scan cycles may still be too slow. * Fix lint complaint. * Require 25 consecutive comm errors to see comms as disconnected. The number of max errors can be overridden by defining `SPLIT_MAX_CONNECTION_ERRORS`. * Add comments to new defines, and ability to disable disconnection check. Also increase `SPLIT_MAX_CONNECTION_ERRORS` to 40, since it's divisible by most relevant numbers for the description. * Make lint happy ...again * Only update `connection_check_timer` when needed. * Add new defines to split keyboard documentation. * Move connection timeout logic to transport.c, add `is_transport_connected`. * Use split_common disconnection logic in matrix.c. Instead of doing more or less the same thing twice. * Move disconnection logic to `transport_master`. Is a cleaner implementation, and causes the scan rate while disconnected to increase instead of decrease. * Lint fixes. * Lower default `SERIAL_USART_TIMEOUT` to 20 ms. The read timeout must be low enough to not cause exessively long scan cycles when using a solo split half. 10 ms was determined from testing to work fine even with the slowest defined baudrate of 19200 (5 ms was too low for that case), so 20 ms should be fine for most cases. * Remove `SERIAL_USART_TIMEOUT` from ergodox_infinity/config.h Was somewhat mistakenly included in an earlier PR. * Fix building with `USE_I2C`. * Reduce built firmware size. Not really sure why this works, the idea was taken from tzarc's work on split disconnection. * Tweak and improve opt-out for split disconnection logic. There are now two ways to opt out from this feature: * Set `SPLIT_MAX_CONNECTION_ERRORS` to 0. This will completely disable the connection status checks (also affects the slave matrix reset logic in matrix.c, though). * Set `SPLIT_CONNECTION_CHECK_TIMEOUT` to 0. This will only disable the communication throttling while disconnected. Will make the firmware smaller. * Make split disconnection logic work with custom transports. Includes a fallback implementation for keyboards using a custom split_util.c but not a custom matrix.c (currently no such keyboard seems to be merged, though). * Remove unnecessary include of timer.h Co-authored-by: Joel Challis <git@zvecr.com> Co-authored-by: Joel Challis <git@zvecr.com>
196 lines
6.4 KiB
C
196 lines
6.4 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 bool usbIsActive(void) {
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for (uint8_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) { return usb_vbus_state(); }
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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) { return connection_errors < SPLIT_MAX_CONNECTION_ERRORS; }
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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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