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/**
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*
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* @license MIT License
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*
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* Copyright (c) 2022 lewis he
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* @file TouchDrv_CSTxxx_GetPoint.ino
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* @author Lewis He (lewishe@outlook.com)
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* @date 2023-04-24
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*
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*/
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#include <Wire.h>
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#include <SPI.h>
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#include <Arduino.h>
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#include "TouchDrvCSTXXX.hpp"
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#ifndef TOUCH_SDA
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#define TOUCH_SDA 8
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#endif
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#ifndef TOUCH_SCL
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#define TOUCH_SCL 10
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#endif
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#ifndef TOUCH_IRQ
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#define TOUCH_IRQ 5
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#endif
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#ifndef TOUCH_RST
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#define TOUCH_RST -1
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#endif
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TouchDrvCSTXXX touch;
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int16_t x[5], y[5];
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bool isPressed = false;
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void scanDevices(void)
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{
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byte error, address;
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int nDevices = 0;
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Serial.println("Scanning for I2C devices ...");
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for (address = 0x01; address < 0x7f; address++) {
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Wire.beginTransmission(address);
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error = Wire.endTransmission();
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if (error == 0) {
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Serial.print("I2C device found at address 0x");
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Serial.println(address, HEX);
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nDevices++;
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} else if (error != 2) {
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Serial.print("Error ");
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Serial.print(error);
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Serial.print(" at address 0x");
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Serial.println(address, HEX);
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}
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}
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if (nDevices == 0) {
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Serial.println("No I2C devices found");
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}
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}
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void setup()
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{
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Serial.begin(115200);
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while (!Serial);
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#if TOUCH_RST != -1
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pinMode(TOUCH_RST, OUTPUT);
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digitalWrite(TOUCH_RST, LOW);
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delay(30);
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digitalWrite(TOUCH_RST, HIGH);
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delay(50);
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// delay(1000);
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#endif
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// Search for known CSTxxx device addresses
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uint8_t address = 0xFF;
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#if (defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32)) && !defined(ARDUINO_ARCH_MBED)
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Wire.setSCL(TOUCH_SCL);
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Wire.setSDA(TOUCH_SDA);
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Wire.begin();
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#elif defined(ARDUINO_ARCH_NRF52)
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Wire.setPins(TOUCH_SDA, TOUCH_SCL);
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Wire.begin();
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#elif defined(ARDUINO_ARCH_ESP32)
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Wire.begin(TOUCH_SDA, TOUCH_SCL);
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#else
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Wire.begin();
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#endif
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// Scan I2C devices
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scanDevices();
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Wire.beginTransmission(CST816_SLAVE_ADDRESS);
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if (Wire.endTransmission() == 0) {
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address = CST816_SLAVE_ADDRESS;
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}
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Wire.beginTransmission(CST226SE_SLAVE_ADDRESS);
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if (Wire.endTransmission() == 0) {
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address = CST226SE_SLAVE_ADDRESS;
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}
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Wire.beginTransmission(CST328_SLAVE_ADDRESS);
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if (Wire.endTransmission() == 0) {
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address = CST328_SLAVE_ADDRESS;
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}
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while (address == 0xFF) {
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Serial.println("Could't find touch chip!"); delay(1000);
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}
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touch.setPins(TOUCH_RST, TOUCH_IRQ);
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/*
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* Support type.
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* TouchDrv_UNKOWN : Judging by identification ID
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* TouchDrv_CST8XX : CST816X,CST328,CST716,CST820
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* TouchDrv_CST226 : CST226X
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* TouchDrv_CST92XX : CST9217,CST9220
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*/
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// Can choose fixed touch model or automatic identification by ID
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// touch.setTouchDrvModel(TouchDrv_CST226);
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// Support CST81X CST226 CST9217 CST9220 ....
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bool result = touch.begin(Wire, address, TOUCH_SDA, TOUCH_SCL);
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if (result == false) {
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while (1) {
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Serial.println("Failed to initialize CST series touch, please check the connection...");
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delay(1000);
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}
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}
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Serial.print("Model :"); Serial.println(touch.getModelName());
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// T-Display-S3 CST328 touch panel, touch button coordinates are is 85 , 360
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// touch.setCenterButtonCoordinate(85, 360);
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// T-Display-AMOLED 1.91 Inch CST816T touch panel, touch button coordinates is 600, 120.
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// touch.setCenterButtonCoordinate(600, 120); // Only suitable for AMOLED 1.91 inch
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// T-Display-Bar Inch CST820 touch panel, touch button coordinates is 30,400
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// touch.setCenterButtonCoordinate(30, 400); // Only suitable for T-Display-Bar
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// Depending on the touch panel, not all touch panels have touch buttons.
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touch.setHomeButtonCallback([](void *user_data) {
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Serial.println("Home key pressed!");
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}, NULL);
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// Unable to obtain coordinates after turning on sleep
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// CST816T sleep current = 1.1 uA
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// CST226SE sleep current = 60 uA
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// touch.sleep();
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// Set touch max xy
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// touch.setMaxCoordinates(536, 240);
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// Set swap xy
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// touch.setSwapXY(true);
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// Set mirror xy
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// touch.setMirrorXY(true, true);
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//Register touch plane interrupt pin
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attachInterrupt(TOUCH_IRQ, []() {
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isPressed = true;
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}, FALLING);
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}
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void loop()
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{
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if (isPressed) {
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isPressed = false;
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uint8_t touched = touch.getPoint(x, y, touch.getSupportTouchPoint());
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if (touched) {
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for (int i = 0; i < touched; ++i) {
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Serial.print("X[");
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Serial.print(i);
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Serial.print("]:");
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Serial.print(x[i]);
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Serial.print(" ");
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Serial.print(" Y[");
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Serial.print(i);
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Serial.print("]:");
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Serial.print(y[i]);
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Serial.print(" ");
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}
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Serial.println();
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}
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}
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delay(5);
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}
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