195 lines
8.1 KiB
C
195 lines
8.1 KiB
C
#include "thumbstick.h"
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void thumbstick_init(void) {
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thumbstickTimer = 0;
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thumbstickScrollTimer = 0;
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thumbstick_state.config.mode = THUMBSTICK_MODE_MOUSE;
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thumbstick_state.config.deadZone = THUMBSTICK_DEAD_ZONE;
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thumbstick_state.config.fineZone = THUMBSTICK_FINE_ZONE;
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thumbstick_state.config.speed = THUMBSTICK_SPEED;
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thumbstick_state.config.fineSpeed = THUMBSTICK_FINE_SPEED;
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thumbstick_state.config.axisSeparation = THUMBSTICK_AXIS_SEPARATION;
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thumbstick_state.config.eightAxis = THUMBSTICK_EIGHT_AXIS;
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#if defined THUMBSTICK_DEBUG
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rawX = 0;
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rawY = 0;
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distX = 0;
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distY = 0;
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thumbstickLogTimer = 0;
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#endif
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}
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// Axis-level wrapper to read raw value, do logging and calculate speed
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int16_t thumbstick_get_component(uint8_t pin) {
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uint16_t analogValue = analogReadPin(pin);
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// Compute direction
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bool directionIsPositive = (analogValue > THUMBSTICK_RANGE_CENTER);
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// Compute distance from the center
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uint16_t distance = directionIsPositive ? (analogValue - THUMBSTICK_RANGE_CENTER) : (THUMBSTICK_RANGE_CENTER - analogValue);
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#if defined THUMBSTICK_DEBUG
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if (pin == THUMBSTICK_PIN_X) {
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rawX = analogValue;
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distX = distance;
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} else {
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rawY = analogValue;
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distY = distance;
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}
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#endif
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// Compute component (range of [0 to 1023])
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return directionIsPositive ? distance : -(int16_t)distance;
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}
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void thumbstick_mode_set(thumbstick_mode_t mode) { thumbstick_state.config.mode = mode; }
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thumbstick_mode_t thumbstick_mode_get(void) { return thumbstick_state.config.mode; }
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void thumbstick_mode_cycle(bool reverse) {
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thumbstick_mode_t mode = thumbstick_mode_get();
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if (reverse) {
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mode = (mode == 0) ? (_THUMBSTICK_MODE_LAST - 1) : (mode - 1);
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} else {
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mode = (mode == (_THUMBSTICK_MODE_LAST - 1)) ? 0 : (mode + 1);
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}
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thumbstick_mode_set(mode);
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}
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// Get mouse speed
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int16_t thumbstick_get_mouse_speed(int16_t component) {
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int16_t maxSpeed;
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uint16_t distance = abs(component);
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if (distance > THUMBSTICK_FINE_ZONE) {
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maxSpeed = THUMBSTICK_SPEED;
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} else if (distance > THUMBSTICK_DEAD_ZONE) {
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maxSpeed = THUMBSTICK_FINE_SPEED;
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} else {
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return 0;
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}
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return (float)maxSpeed * component / THUMBSTICK_RANGE_CENTER;
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}
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// Fix direction within one of 8 axes (or 4 if 8-axis is disabled)
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thumbstick_direction_t thumbstick_get_discretized_direction(thumbstick_vector_t vector, float axisSeparation, bool eightAxis) {
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thumbstick_direction_t direction;
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uint16_t absX = abs(vector.x);
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uint16_t absY = abs(vector.y);
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uint16_t maxComponent = (absX > absY) ? absX : absY;
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bool insideDeadZone = (maxComponent <= THUMBSTICK_DEAD_ZONE);
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bool outsideDiagonalZone = ((abs(absX - absY) / (float)maxComponent) >= axisSeparation);
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if (insideDeadZone) {
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direction.up = direction.down = direction.left = direction.right = false;
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} else {
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direction.up = (vector.y < 0);
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direction.down = (vector.y > 0);
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direction.left = (vector.x < 0);
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direction.right = (vector.x > 0);
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// Let only the dominant direction remain under the right conditions
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if (outsideDiagonalZone || !eightAxis) {
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if (absX > absY) {
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direction.up = direction.down = false;
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} else {
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direction.left = direction.right = false;
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}
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}
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}
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return direction;
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}
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thumbstick_direction_t scrollDirection; // Declaring global to save stack space
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void thumbstick_process(void) {
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if (timer_elapsed(thumbstickTimer) > THUMBSTICK_TIMEOUT) {
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thumbstickTimer = timer_read();
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#ifndef THUMBSTICK_FLIP_X
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thumbstick_state.vector.x = thumbstick_get_component(THUMBSTICK_PIN_X);
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#else
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thumbstick_state.vector.x = -thumbstick_get_component(THUMBSTICK_PIN_X);
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#endif
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#ifndef THUMBSTICK_FLIP_Y
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thumbstick_state.vector.y = thumbstick_get_component(THUMBSTICK_PIN_Y);
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#else
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thumbstick_state.vector.y = -thumbstick_get_component(THUMBSTICK_PIN_Y);
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#endif
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switch (thumbstick_state.config.mode) {
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case THUMBSTICK_MODE_MOUSE:
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thumbstick_state.report.x = thumbstick_get_mouse_speed(thumbstick_state.vector.x);
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thumbstick_state.report.y = thumbstick_get_mouse_speed(thumbstick_state.vector.y);
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break;
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case THUMBSTICK_MODE_ARROWS:
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thumbstick_state.direction = thumbstick_get_discretized_direction(thumbstick_state.vector, thumbstick_state.config.axisSeparation, thumbstick_state.config.eightAxis);
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break;
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case THUMBSTICK_MODE_SCROLL:
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if (timer_elapsed(thumbstickScrollTimer) > THUMBSTICK_SCROLL_TIMEOUT) {
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thumbstickScrollTimer = timer_read();
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scrollDirection = thumbstick_get_discretized_direction(thumbstick_state.vector, thumbstick_state.config.axisSeparation, false);
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thumbstick_state.report.v = (scrollDirection.up || scrollDirection.down) ? (scrollDirection.up ? THUMBSTICK_SCROLL_SPEED : -THUMBSTICK_SCROLL_SPEED) : 0;
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thumbstick_state.report.h = (scrollDirection.left || scrollDirection.right) ? (scrollDirection.left ? -THUMBSTICK_SCROLL_SPEED : THUMBSTICK_SCROLL_SPEED) : 0;
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} else {
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thumbstick_state.report.v = thumbstick_state.report.h = 0;
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}
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break;
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default:
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break;
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}
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}
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}
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void update_keycode_status(uint16_t keycode, bool last, bool current) {
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if (last != current) {
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if (current) {
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register_code16(keycode);
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} else {
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unregister_code16(keycode);
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}
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}
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}
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void pointing_device_init(void) { thumbstick_init(); }
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void pointing_device_task(void) {
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report_mouse_t report = pointing_device_get_report();
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if (!isLeftHand) {
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thumbstick_process();
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switch (thumbstick_state.config.mode) {
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case THUMBSTICK_MODE_MOUSE:
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report.x = thumbstick_state.report.x;
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report.y = thumbstick_state.report.y;
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#ifdef THUMBSTICK_DEBUG
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if (timer_elapsed(thumbstickLogTimer) > 100) {
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thumbstickLogTimer = timer_read();
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uprintf("Raw (%d, %d); Dist (%u, %u); Vec (%d, %d);\n", rawX, rawY, distX, distY, thumbstick_state.vector.x, thumbstick_state.vector.y);
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}
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#endif
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break;
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case THUMBSTICK_MODE_ARROWS:
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update_keycode_status(KC_UP, thumbstick_state.lastDirection.up, thumbstick_state.direction.up);
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update_keycode_status(KC_DOWN, thumbstick_state.lastDirection.down, thumbstick_state.direction.down);
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update_keycode_status(KC_LEFT, thumbstick_state.lastDirection.left, thumbstick_state.direction.left);
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update_keycode_status(KC_RIGHT, thumbstick_state.lastDirection.right, thumbstick_state.direction.right);
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thumbstick_state.lastDirection = thumbstick_state.direction;
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#ifdef THUMBSTICK_DEBUG
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if (timer_elapsed(thumbstickLogTimer) > 100) {
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thumbstickLogTimer = timer_read();
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uprintf("Up %d; Down %d; Left: %d; Right %d; Vec (%d, %d);\n", direction.up, direction.down, direction.left, direction.right, thumbstick_state.vector.x, thumbstick_state.vector.y);
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}
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#endif
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break;
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case THUMBSTICK_MODE_SCROLL:
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report.v = thumbstick_state.report.v;
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report.h = thumbstick_state.report.h;
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#ifdef THUMBSTICK_DEBUG
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if (timer_elapsed(thumbstickLogTimer) > 100) {
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thumbstickLogTimer = timer_read();
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uprintf("Scroll (%d, %d)\n", report.h, report.v);
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}
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#endif
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break;
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default:
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break;
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}
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}
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pointing_device_set_report(report);
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pointing_device_send();
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}
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