add support CST816S touch screen.

src/lgfx/v1/touch/Touch_CST816S.cpp

@@ -0,0 +1,165 @@
+/*----------------------------------------------------------------------------/
+  Lovyan GFX - Graphics library for embedded devices.
+
+Original Source:
+ https://github.com/lovyan03/LovyanGFX/
+
+Licence:
+ [FreeBSD](https://github.com/lovyan03/LovyanGFX/blob/master/license.txt)
+
+Author:
+ [lovyan03](https://twitter.com/lovyan03)
+
+Contributors:
+ [ciniml](https://github.com/ciniml)
+ [mongonta0716](https://github.com/mongonta0716)
+ [tobozo](https://github.com/tobozo)
+/----------------------------------------------------------------------------*/
+
+// CST816 info from here...
+// https://github.com/lupyuen/hynitron_i2c_cst0xxse/blob/master/cst0xx_common.h
+// https://blog.csdn.net/Distance_98/article/details/126408819
+
+#include "Touch_CST816S.hpp"
+
+#include "../platforms/common.hpp"
+
+namespace lgfx
+{
+ inline namespace v1
+ {
+//----------------------------------------------------------------------------
+
+  static constexpr uint8_t CST816S_TOUCH_REG  = 0x01;
+  static constexpr uint8_t CST816S_SLEEP_REG  = 0xA5;
+  static constexpr uint8_t CST816S_CHIPID_REG = 0xA7;
+
+  static constexpr uint8_t CST816S_SLEEP_IN   = 0x03;
+
+  bool Touch_CST816S::_write_reg(uint8_t reg, uint8_t val)
+  {
+    return i2c::writeRegister8(_cfg.i2c_port, _cfg.i2c_addr, reg, val, 0, _cfg.freq).has_value();
+  }
+
+  bool Touch_CST816S::_write_regs(uint8_t* val, size_t length)
+  {
+    return i2c::transactionWrite(_cfg.i2c_port, _cfg.i2c_addr, val, length, _cfg.freq).has_value();
+  }
+
+  bool Touch_CST816S::_read_reg(uint8_t reg, uint8_t *data, size_t length)
+  {
+    return lgfx::i2c::transactionWriteRead(_cfg.i2c_port, _cfg.i2c_addr, &reg, 1, data, length, _cfg.freq).has_value();
+  }
+
+  bool Touch_CST816S::_check_init(void)
+  {
+    if (_inited) return true;
+
+    uint8_t tmp[3] = { 0 };
+    _inited = _write_reg(0x00, 0x00)
+          && _read_reg(CST816S_CHIPID_REG, tmp, 3);
+    // _write_reg(0xFA, 0b00000101); // レジスタ0xFAはINTピンの動作設定に関与すると思われる。
+// ESP_LOGV("LGFX","CST816S id:%02x %02x %02x", tmp[0], tmp[1], tmp[2]);
+    return _inited;
+  }
+
+  void IRAM_ATTR Touch_CST816S::_irq_isr(void) {
+    _flg_released = false;
+  }
+//----------------------------------------------------------------------------
+  bool Touch_CST816S::init(void)
+  {
+    _inited = false;
+
+    if (_cfg.pin_rst >= 0)
+    {
+      lgfx::pinMode(_cfg.pin_rst, pin_mode_t::output);
+      lgfx::gpio_lo(_cfg.pin_rst);
+      lgfx::delay(10);
+      lgfx::gpio_hi(_cfg.pin_rst);
+      lgfx::delay(10);
+    }
+
+    if (_cfg.pin_int >= 0)
+    { // intピンのプルアップ処理を行うが、「触れている間 LOW」の設定方法が不明のため、このピンを使用していない。
+      // GPIO割込みを使用すれば良いが、Arduinoに依存せず解決する必要があるため、対応を保留する。
+      lgfx::pinMode(_cfg.pin_int, pin_mode_t::input_pullup);
+    }
+    lgfx::i2c::init(_cfg.i2c_port, _cfg.pin_sda, _cfg.pin_scl).has_value();
+
+    // 画面に触れていない時、I2C通信でCST816が見つからない事がある。
+    // CST816S の正確な仕様を確認することができていないが恐らく省電力モード中は通信応答しないものと思われる。
+    // 通信の成否による初期化の成否の判定ができないため、ひとまず true を返す。
+    return true;
+  }
+
+  void Touch_CST816S::wakeup(void)
+  {
+  }
+
+  void Touch_CST816S::sleep(void)
+  {
+    if (!_check_init()) return;
+    // _write_reg(CST816S_SLEEP_REG, CST816S_SLEEP_IN);
+  }
+
+  size_t Touch_CST816S::_read_data(uint8_t* readdata)
+  {
+    size_t res = 0;
+    if (lgfx::i2c::beginTransaction(_cfg.i2c_port, _cfg.i2c_addr, _cfg.freq, false))
+    {
+      readdata[0] = 0x02;
+      if (lgfx::i2c::writeBytes(_cfg.i2c_port, readdata, 1)
+      && lgfx::i2c::restart(_cfg.i2c_port, _cfg.i2c_addr, _cfg.freq, true)
+      && lgfx::i2c::readBytes(_cfg.i2c_port, readdata, 1))
+      {
+        uint_fast8_t points = std::min<uint_fast8_t>(max_touch_points, readdata[0] & 0x0Fu);
+        if (points)
+        {
+          if (lgfx::i2c::readBytes(_cfg.i2c_port, &readdata[1], points * 6 - 2))
+          {
+            res = points * 6 - 1;
+          }
+        }
+        else
+        {
+          res = 1;
+        }
+      }
+      lgfx::i2c::endTransaction(_cfg.i2c_port).has_value();
+    }
+    return res;
+  }
+
+  uint_fast8_t Touch_CST816S::getTouchRaw(touch_point_t *tp, uint_fast8_t count)
+  {
+    if (!_inited && !_check_init()) return 0;
+
+    if (count > max_touch_points) { count = max_touch_points; }
+
+    uint8_t readdata[8];
+    int retry = 3;
+    do
+    {
+      if (!_read_reg(0x02, readdata, 6))
+      {
+        return 0;
+      }
+      count = readdata[0];
+    } while ((count > 1 || readdata[5] != 0x10) && --retry);
+    if (retry && count)
+    {
+      // ESP_LOGV("CST816S", "%02x %02x %02x %02x %02x %02x %02x %02x %d %d",
+      //                     readdata[0], readdata[1], readdata[2], readdata[3],
+      //                     readdata[4], readdata[5], readdata[6], readdata[7], _inited, lgfx::gpio_in(_cfg.pin_int));
+      tp[0].id = 0;
+      tp[0].size = 1;
+      tp[0].x = readdata[2] | (readdata[1] & 0x0F) << 8;
+      tp[0].y = readdata[4] | (readdata[3] & 0x0F) << 8;
+    }
+    return count;
+  }
+
+//----------------------------------------------------------------------------
+ }
+}

src/lgfx/v1/touch/Touch_CST816S.hpp

@@ -0,0 +1,78 @@
+/*----------------------------------------------------------------------------/
+  Lovyan GFX - Graphics library for embedded devices.
+
+Original Source:
+ https://github.com/lovyan03/LovyanGFX/
+
+Licence:
+ [FreeBSD](https://github.com/lovyan03/LovyanGFX/blob/master/license.txt)
+
+Author:
+ [lovyan03](https://twitter.com/lovyan03)
+
+Contributors:
+ [ciniml](https://github.com/ciniml)
+ [mongonta0716](https://github.com/mongonta0716)
+ [tobozo](https://github.com/tobozo)
+/----------------------------------------------------------------------------*/
+#pragma once
+
+#include "../Touch.hpp"
+
+namespace lgfx
+{
+ inline namespace v1
+ {
+//----------------------------------------------------------------------------
+
+  struct Touch_CST816S : public ITouch
+  {
+    enum CS816S_GESTURE {
+      NONE         = 0x00,
+      SWIPE_UP     = 0x01,
+      SWIPE_DOWN   = 0x02,
+      SWIPE_LEFT   = 0x03,
+      SWIPE_RIGHT  = 0x04,
+      SINGLE_CLICK = 0x05,
+      DOUBLE_CLICK = 0x0B,
+      LONG_PRESS   = 0x0C
+    };
+
+    Touch_CST816S(void)
+    {
+      _cfg.i2c_addr = 0x15;
+      _cfg.x_min = 0;
+      _cfg.x_max = 320;
+      _cfg.y_min = 0;
+      _cfg.y_max = 320;
+    }
+
+    bool init(void) override;
+
+    void wakeup(void) override;
+
+    void sleep(void) override;
+
+    uint_fast8_t getTouchRaw(touch_point_t* tp, uint_fast8_t count) override;
+
+    CS816S_GESTURE getGesture();
+
+  private:
+    enum
+    {
+      max_touch_points = 1
+    };
+
+    bool _flg_released = false;
+
+    bool _check_init(void);
+    bool _write_reg(uint8_t reg, uint8_t val);
+    bool _write_regs(uint8_t* val, size_t length);
+    bool _read_reg(uint8_t reg, uint8_t *data, size_t length);
+    size_t _read_data(uint8_t* data);
+    void _irq_isr(void);
+  };
+
+//----------------------------------------------------------------------------
+ }
+}

src/lgfx/v1_init.hpp

@@ -57,6 +57,7 @@ Original Source:
 #include "v1/panel/Panel_M5UnitLCD.hpp"
 
 // TouchScreen
+#include "v1/touch/Touch_CST816S.hpp"
 #include "v1/touch/Touch_FT5x06.hpp"
 #include "v1/touch/Touch_GSLx680.hpp"
 #include "v1/touch/Touch_GT911.hpp"