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1 files changed, 81 insertions, 0 deletions

diff --git a/Marlin/src/HAL/STM32/tft/xpt2046.h b/Marlin/src/HAL/STM32/tft/xpt2046.h
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+++ b/Marlin/src/HAL/STM32/tft/xpt2046.h
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#ifdef STM32F1xx
+  #include <stm32f1xx_hal.h>
+#elif defined(STM32F4xx)
+  #include <stm32f4xx_hal.h>
+#endif
+
+#include "../../../inc/MarlinConfig.h"
+
+// Not using regular SPI interface by default to avoid SPI mode conflicts with other SPI devices
+
+#if !PIN_EXISTS(TOUCH_MISO)
+  #error "TOUCH_MISO_PIN is not defined."
+#elif !PIN_EXISTS(TOUCH_MOSI)
+  #error "TOUCH_MOSI_PIN is not defined."
+#elif !PIN_EXISTS(TOUCH_SCK)
+  #error "TOUCH_SCK_PIN is not defined."
+#elif !PIN_EXISTS(TOUCH_CS)
+  #error "TOUCH_CS_PIN is not defined."
+#endif
+
+#ifndef TOUCH_INT_PIN
+  #define TOUCH_INT_PIN  -1
+#endif
+
+#define XPT2046_DFR_MODE        0x00
+#define XPT2046_SER_MODE        0x04
+#define XPT2046_CONTROL         0x80
+
+enum XPTCoordinate : uint8_t {
+  XPT2046_X  = 0x10 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+  XPT2046_Y  = 0x50 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+  XPT2046_Z1 = 0x30 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+  XPT2046_Z2 = 0x40 | XPT2046_CONTROL | XPT2046_DFR_MODE,
+};
+
+#if !defined(XPT2046_Z1_THRESHOLD)
+  #define XPT2046_Z1_THRESHOLD 10
+#endif
+
+class XPT2046 {
+private:
+  static SPI_HandleTypeDef SPIx;
+
+  static bool isBusy() { return false; }
+
+  static uint16_t getRawData(const XPTCoordinate coordinate);
+  static bool isTouched();
+
+  static inline void DataTransferBegin() { if (SPIx.Instance) { HAL_SPI_Init(&SPIx); } WRITE(TOUCH_CS_PIN, LOW); };
+  static inline void DataTransferEnd() { WRITE(TOUCH_CS_PIN, HIGH); };
+  static uint16_t HardwareIO(uint16_t data);
+  static uint16_t SoftwareIO(uint16_t data);
+  static uint16_t IO(uint16_t data = 0) { return SPIx.Instance ? HardwareIO(data) : SoftwareIO(data); }
+
+public:
+  static void Init();
+  static bool getRawPoint(int16_t *x, int16_t *y);
+};