Add touch screen support to freenove 2.8 (#1901)

* Add touch screen support to freenove 2.8

Volume and brightness levels on vertical/horizontal swipe
Listening, chat state and wifi config on press/long press

* Simplified

Removed swipes. Touch quiet unresponsive on Freenove board.

* Remove unused parts

* Modify long tap duration in TouchTask

Updated touch driver logic to change long tap duration from 600ms to 3000ms.

* Cosmetic fix

main/boards/freenove-esp32s3-display-2.8-lcd/freenove-esp32s3-display-2.8-lcd.cc

@@ -14,6 +14,9 @@
 #include <esp_log.h>
 #include <driver/i2c_master.h>
 #include <driver/spi_common.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+#include <esp_timer.h>
 
 #include "led/single_led.h"
 #include "system_reset.h"
@@ -21,11 +24,99 @@
 
 #define TAG "FreenoveESP32S3Display"
 
+class TouchDriver {
+public:
+    TouchDriver() : dev_(nullptr) {}
+
+    bool Init(i2c_master_bus_handle_t bus, uint8_t addr) {
+        i2c_device_config_t cfg = {
+            .device_address = addr,
+            .scl_speed_hz = 400000,
+            .scl_wait_us = 0,
+        };
+        return i2c_master_bus_add_device(bus, &cfg, &dev_) == ESP_OK;
+    }
+
+    bool Read(bool &touched, uint16_t &x, uint16_t &y) {
+        touched = false;
+        x = y = 0;
+        if (!dev_) return false;
+
+        uint8_t reg = 0x02;
+        uint8_t buf[5];
+        if (i2c_master_transmit_receive(dev_, &reg, 1, buf, 5, 50) != ESP_OK) return false;
+
+        uint8_t points = buf[0] & 0x0F;
+        if (points == 0) return true;
+
+        touched = true;
+        x = ((buf[1] & 0x0F) << 8) | buf[2];
+        y = ((buf[3] & 0x0F) << 8) | buf[4];
+        return true;
+    }
+
+private:
+    i2c_master_dev_handle_t dev_;
+};
+
 class FreenoveESP32S3Display : public WifiBoard {
- private:
+private:
     Button boot_button_;
     LcdDisplay *display_;
     i2c_master_bus_handle_t codec_i2c_bus_;
+    TouchDriver touch_;
+
+    static void TouchTask(void *arg) {
+        auto *self = static_cast<FreenoveESP32S3Display*>(arg);
+        auto &app = Application::GetInstance();
+
+        uint32_t last_tap = 0;
+        uint32_t down_start = 0;
+        bool down = false;
+
+        while (true) {
+            bool t;
+            uint16_t x, y;
+            self->touch_.Read(t, x, y);
+
+            uint32_t now = esp_timer_get_time() / 1000;
+
+            if (t) {
+                if (!down) {
+                    down = true;
+                    down_start = now;
+                }
+            }
+
+            if (!t && down) {
+                down = false;
+
+                uint32_t press = now - down_start;
+
+                // long tap
+                if (press > 3000) {
+                    self->EnterWifiConfigMode();
+                } else {
+                    // double tap
+                    if (now - last_tap < 250) {
+                        app.StartListening();
+                        last_tap = 0;
+                    } else {
+                        // single tap
+                        app.ToggleChatState();
+                        last_tap = now;
+                    }
+                }
+            }
+
+            vTaskDelay(pdMS_TO_TICKS(50));
+        }
+    }
+
+    void InitializeTouch() {
+        if (!touch_.Init(codec_i2c_bus_, 0x38)) return;
+        xTaskCreatePinnedToCore(TouchTask, "touch_task", 4096, this, 5, nullptr, 0);
+    }
 
     void InitializeI2c() {
         i2c_master_bus_config_t i2c_bus_cfg = {
@@ -64,7 +155,6 @@ class FreenoveESP32S3Display : public WifiBoard {
         });
     }
 
-  
     void InitializeLcdDisplay() {
         esp_lcd_panel_io_handle_t panel_io = nullptr;
         esp_lcd_panel_handle_t panel = nullptr;
@@ -103,13 +193,13 @@ class FreenoveESP32S3Display : public WifiBoard {
     void InitializeTools() {
     }
 
-
- public:
+public:
     FreenoveESP32S3Display(): boot_button_(BOOT_BUTTON_GPIO)
     {
         InitializeI2c();
         InitializeSpi();
         InitializeLcdDisplay();
+        InitializeTouch();
         InitializeButtons();
         InitializeTools();
         GetBacklight()->SetBrightness(100);
@@ -134,7 +224,6 @@ class FreenoveESP32S3Display : public WifiBoard {
         static PwmBacklight backlight(DISPLAY_BACKLIGHT_PIN, DISPLAY_BACKLIGHT_OUTPUT_INVERT);
         return &backlight;
     }
-
 };
 
 DECLARE_BOARD(FreenoveESP32S3Display);