Robin & Longer3D SPI TFT driver (#14595)
Tanguy Pruvot
6 years ago
committed by
Scott Lahteine
parent
45bde333d5
commit
81d629bc47
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/**
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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 <http://www.gnu.org/licenses/>.
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*
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*/
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#include "../../inc/MarlinConfigPre.h"
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#if ENABLED(TOUCH_BUTTONS)
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#include "xpt2046.h"
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#include "../../inc/MarlinConfig.h"
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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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#ifndef TOUCH_MISO_PIN
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#define TOUCH_MISO_PIN MISO_PIN
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#endif
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#ifndef TOUCH_MOSI_PIN
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#define TOUCH_MOSI_PIN MOSI_PIN
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#endif
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#ifndef TOUCH_SCK_PIN
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#define TOUCH_SCK_PIN SCK_PIN
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#endif
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#ifndef TOUCH_CS_PIN
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#define TOUCH_CS_PIN CS_PIN
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#endif
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XPT2046 touch;
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extern int8_t encoderDiff;
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void XPT2046::init(void) {
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SET_INPUT(TOUCH_INT_PIN); // Pendrive interrupt pin, used as polling in getInTouch
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SET_INPUT(TOUCH_MISO_PIN);
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SET_OUTPUT(TOUCH_MOSI_PIN);
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OUT_WRITE(TOUCH_SCK_PIN, 0);
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OUT_WRITE(TOUCH_CS_PIN, 1);
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// Read once to enable pendrive status pin
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getInTouch(XPT2046_X);
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}
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#include "../../lcd/ultralcd.h" // For EN_C bit mask
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uint8_t XPT2046::read_buttons() {
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int16_t tsoffsets[4] = { 0 };
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static uint32_t timeout = 0;
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if (PENDING(millis(), timeout)) return 0;
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timeout = millis() + 250;
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if (tsoffsets[0] + tsoffsets[1] == 0) {
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// Not yet set, so use defines as fallback...
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tsoffsets[0] = XPT2046_X_CALIBRATION;
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tsoffsets[1] = XPT2046_X_OFFSET;
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tsoffsets[2] = XPT2046_Y_CALIBRATION;
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tsoffsets[3] = XPT2046_Y_OFFSET;
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}
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// We rely on XPT2046 compatible mode to ADS7843, hence no Z1 and Z2 measurements possible.
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if (READ(TOUCH_INT_PIN)) return 0; // If HIGH there are no screen presses.
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const uint16_t x = uint16_t(((uint32_t(getInTouch(XPT2046_X))) * tsoffsets[0]) >> 16) + tsoffsets[1],
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y = uint16_t(((uint32_t(getInTouch(XPT2046_Y))) * tsoffsets[2]) >> 16) + tsoffsets[3];
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if (READ(TOUCH_INT_PIN)) return 0; // Fingers must still be on the TS for a valid read.
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if (y < 185 || y > 224) return 0;
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if (WITHIN(x, 21, 98)) encoderDiff = -(ENCODER_STEPS_PER_MENU_ITEM) * ENCODER_PULSES_PER_STEP;
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else if (WITHIN(x, 121, 198)) encoderDiff = ENCODER_STEPS_PER_MENU_ITEM * ENCODER_PULSES_PER_STEP;
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else if (WITHIN(x, 221, 298)) return EN_C;
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return 0;
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}
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uint16_t XPT2046::getInTouch(const XPTCoordinate coordinate) {
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uint16_t data[3];
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OUT_WRITE(TOUCH_CS_PIN, LOW);
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const uint8_t coord = uint8_t(coordinate) | XPT2046_CONTROL | XPT2046_DFR_MODE;
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for (uint16_t i = 0; i < 3 ; i++) {
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for (uint8_t j = 0x80; j; j >>= 1) {
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WRITE(TOUCH_SCK_PIN, LOW);
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WRITE(TOUCH_MOSI_PIN, bool(coord & j));
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WRITE(TOUCH_SCK_PIN, HIGH);
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}
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data[i] = 0;
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for (uint16_t j = 0x8000; j; j >>= 1) {
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WRITE(TOUCH_SCK_PIN, LOW);
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if (READ(TOUCH_MISO_PIN)) data[i] |= j;
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WRITE(TOUCH_SCK_PIN, HIGH);
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}
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WRITE(TOUCH_SCK_PIN, LOW);
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data[i] >>= 4;
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}
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WRITE(TOUCH_CS_PIN, HIGH);
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uint16_t delta01 = _MAX(data[0], data[1]) - _MIN(data[0], data[1]),
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delta02 = _MAX(data[0], data[2]) - _MIN(data[0], data[2]),
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delta12 = _MAX(data[1], data[2]) - _MIN(data[1], data[2]);
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if (delta01 <= delta02 && delta01 <= delta12)
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return (data[0] + data[1]) >> 1;
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if (delta02 <= delta12)
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return (data[0] + data[2]) >> 1;
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return (data[1] + data[2]) >> 1;
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}
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#endif // TOUCH_BUTTONS
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@ -0,0 +1,43 @@
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/**
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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 <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <stdint.h>
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// Relies on XPT2046-compatible mode of ADS7843,
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// hence no Z1 / Z2 measurements are possible.
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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,
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XPT2046_Y = 0x50
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};
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class XPT2046 {
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public:
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static void init(void);
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static uint8_t read_buttons();
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private:
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static uint16_t getInTouch(const XPTCoordinate coordinate);
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};
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extern XPT2046 touch;
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