113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
#include "drivers/Cst816s.h"
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#include <SDL2/SDL.h>
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#include <libraries/log/nrf_log.h>
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#include <cmath>
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using namespace Pinetime::Drivers;
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/* References :
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* This implementation is based on this article :
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* https://medium.com/@ly.lee/building-a-rust-driver-for-pinetimes-touch-controller-cbc1a5d5d3e9 Touch panel datasheet (weird chinese
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* translation) : https://wiki.pine64.org/images/5/51/CST816S%E6%95%B0%E6%8D%AE%E6%89%8B%E5%86%8CV1.1.en.pdf
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*
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* TODO : we need a complete datasheet and protocol reference!
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* */
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//Cst816S::Cst816S(TwiMaster& twiMaster, uint8_t twiAddress) : twiMaster {twiMaster}, twiAddress {twiAddress} {
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//}
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Cst816S::Cst816S() {
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}
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bool Cst816S::Init() {
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return true;
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}
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Cst816S::TouchInfos Cst816S::GetTouchInfo() {
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int x, y;
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uint32_t buttons = SDL_GetMouseState(&x, &y);
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Cst816S::TouchInfos info;
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info.x = x;
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info.y = y;
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info.touching = (buttons & SDL_BUTTON_LMASK) != 0;
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//info.gesture = gesture;
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info.isValid = x > 0 && x <= maxX && y > 0 && y <= maxY;
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if(info.isValid) {
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if(!is_pressed && info.touching) {
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// start klick
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pressed_since = std::chrono::steady_clock::now();
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is_pressed = true;
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is_long_press = false;
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is_swipe = false;
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is_stationary = true;
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x_start = info.x;
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y_start = info.y;
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} else if(is_pressed && info.touching) {
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// is it long press?
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if (is_stationary) { // check if while touching we moved away from the start coordinates
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double x_diff = static_cast<double>(info.x) - x_start;
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double y_diff = static_cast<double>(info.y) - y_start;
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double norm = hypot(x_diff, y_diff);
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if(norm > 20) { // we moved out of start area
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is_stationary = false;
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}
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}
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if (!is_long_press && !is_swipe) { // check for long-press only if it's not yet a long-press and didn't move
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std::chrono::duration<double> press_duration = std::chrono::steady_clock::now() - pressed_since;
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if(is_stationary && press_duration.count() > 1.0) {
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// longer than 1 second pressed, then it is long-press
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is_long_press = true;
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info.gesture = Gestures::LongPress;
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} else if(!is_stationary) {
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// moved mouse fast enough to not be a long-press
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is_swipe = true;
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double x_diff = static_cast<double>(info.x) - x_start;
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double y_diff = static_cast<double>(info.y) - y_start;
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if (fabs(x_diff) > fabs(y_diff)) {
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// x-swipe
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if (x_diff < 0) {
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info.gesture = Gestures::SlideLeft;
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} else {
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info.gesture = Gestures::SlideRight;
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}
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} else {
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// y-swipe
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if (y_diff < 0) {
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info.gesture = Gestures::SlideUp;
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} else {
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info.gesture = Gestures::SlideDown;
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}
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}
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}
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}
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} else if(is_pressed && !info.touching) {
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// end klick
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is_pressed = false;
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double x_diff = static_cast<double>(info.x) - x_start;
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double y_diff = static_cast<double>(info.y) - y_start;
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double norm = hypot(x_diff, y_diff);
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if(norm < 20) {
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if(is_stationary && !is_long_press && !is_swipe) {
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// no swipe with less than 5 pixel mouse movement
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info.gesture = Gestures::SingleTap;
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}
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}
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}
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}
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return info;
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}
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void Cst816S::Sleep() {
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NRF_LOG_INFO("[TOUCHPANEL] Sleep");
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}
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void Cst816S::Wakeup() {
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Init();
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NRF_LOG_INFO("[TOUCHPANEL] Wakeup");
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}
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bool Cst816S::CheckDeviceIds() {
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return chipId == 0xb4 && vendorId == 0 && fwVersion == 1;
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}
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