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86 lines
2.7 KiB
86 lines
2.7 KiB
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#ifdef STM32F1xx
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#include <stm32f1xx_hal.h>
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#elif defined(STM32F4xx)
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#include <stm32f4xx_hal.h>
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#endif
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#include "../../../inc/MarlinConfig.h"
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// Not using regular SPI interface by default to avoid SPI mode conflicts with other SPI devices
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#if !PIN_EXISTS(TOUCH_MISO)
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#error "TOUCH_MISO_PIN is not defined."
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#elif !PIN_EXISTS(TOUCH_MOSI)
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#error "TOUCH_MOSI_PIN is not defined."
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#elif !PIN_EXISTS(TOUCH_SCK)
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#error "TOUCH_SCK_PIN is not defined."
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#elif !PIN_EXISTS(TOUCH_CS)
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#error "TOUCH_CS_PIN is not defined."
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#endif
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#ifndef TOUCH_INT_PIN
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#define TOUCH_INT_PIN -1
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#endif
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#define XPT2046_DFR_MODE 0x00
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#define XPT2046_SER_MODE 0x04
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#define XPT2046_CONTROL 0x80
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enum XPTCoordinate : uint8_t {
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XPT2046_X = 0x10 | XPT2046_CONTROL | XPT2046_DFR_MODE,
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XPT2046_Y = 0x50 | XPT2046_CONTROL | XPT2046_DFR_MODE,
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XPT2046_Z1 = 0x30 | XPT2046_CONTROL | XPT2046_DFR_MODE,
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XPT2046_Z2 = 0x40 | XPT2046_CONTROL | XPT2046_DFR_MODE,
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};
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#if !defined(XPT2046_Z1_THRESHOLD)
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#define XPT2046_Z1_THRESHOLD 10
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#endif
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#ifdef STM32F1xx
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#define __IS_DMA_ENABLED(__HANDLE__) ((__HANDLE__)->Instance->CCR & DMA_CCR_EN)
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#elif defined(STM32F4xx)
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#define __IS_DMA_ENABLED(__HANDLE__) ((__HANDLE__)->Instance->CR & DMA_SxCR_EN)
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#endif
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class XPT2046 {
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private:
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static SPI_HandleTypeDef SPIx;
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static DMA_HandleTypeDef DMAtx;
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static bool isBusy() { return SPIx.Instance ? __IS_DMA_ENABLED(&DMAtx) : false; }
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static uint16_t getRawData(const XPTCoordinate coordinate);
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static bool isTouched();
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static inline void DataTransferBegin() { if (SPIx.Instance) { HAL_SPI_Init(&SPIx); } WRITE(TOUCH_CS_PIN, LOW); };
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static inline void DataTransferEnd() { WRITE(TOUCH_CS_PIN, HIGH); };
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static uint16_t HardwareIO(uint16_t data);
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static uint16_t SoftwareIO(uint16_t data);
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static uint16_t IO(uint16_t data = 0) { return SPIx.Instance ? HardwareIO(data) : SoftwareIO(data); }
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public:
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static void Init();
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static bool getRawPoint(int16_t *x, int16_t *y);
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};
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