You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
3.3 KiB
128 lines
3.3 KiB
/**
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
|
|
*
|
|
* 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/>.
|
|
*
|
|
*/
|
|
|
|
#include "../../../inc/MarlinConfig.h"
|
|
|
|
#if HAS_TFT_XPT2046 || HAS_TOUCH_XPT2046
|
|
|
|
#include "xpt2046.h"
|
|
#include <SPI.h>
|
|
|
|
uint16_t delta(uint16_t a, uint16_t b) { return a > b ? a - b : b - a; }
|
|
|
|
#if ENABLED(TOUCH_BUTTONS_HW_SPI)
|
|
#include <SPI.h>
|
|
|
|
SPIClass XPT2046::SPIx(TOUCH_BUTTONS_HW_SPI_DEVICE);
|
|
|
|
static void touch_spi_init(uint8_t spiRate) {
|
|
XPT2046::SPIx.setModule(TOUCH_BUTTONS_HW_SPI_DEVICE);
|
|
XPT2046::SPIx.setClock(SPI_CLOCK_DIV128);
|
|
XPT2046::SPIx.setBitOrder(MSBFIRST);
|
|
XPT2046::SPIx.setDataMode(SPI_MODE0);
|
|
XPT2046::SPIx.setDataSize(DATA_SIZE_8BIT);
|
|
}
|
|
#endif
|
|
|
|
void XPT2046::Init() {
|
|
SET_INPUT(TOUCH_MISO_PIN);
|
|
SET_OUTPUT(TOUCH_MOSI_PIN);
|
|
SET_OUTPUT(TOUCH_SCK_PIN);
|
|
OUT_WRITE(TOUCH_CS_PIN, HIGH);
|
|
|
|
#if PIN_EXISTS(TOUCH_INT)
|
|
// Optional Pendrive interrupt pin
|
|
SET_INPUT(TOUCH_INT_PIN);
|
|
#endif
|
|
|
|
TERN_(TOUCH_BUTTONS_HW_SPI, touch_spi_init(SPI_SPEED_6));
|
|
|
|
// Read once to enable pendrive status pin
|
|
getRawData(XPT2046_X);
|
|
}
|
|
|
|
bool XPT2046::isTouched() {
|
|
return isBusy() ? false : (
|
|
#if PIN_EXISTS(TOUCH_INT)
|
|
READ(TOUCH_INT_PIN) != HIGH
|
|
#else
|
|
getRawData(XPT2046_Z1) >= XPT2046_Z1_THRESHOLD
|
|
#endif
|
|
);
|
|
}
|
|
|
|
bool XPT2046::getRawPoint(int16_t *x, int16_t *y) {
|
|
if (isBusy()) return false;
|
|
if (!isTouched()) return false;
|
|
*x = getRawData(XPT2046_X);
|
|
*y = getRawData(XPT2046_Y);
|
|
return isTouched();
|
|
}
|
|
|
|
uint16_t XPT2046::getRawData(const XPTCoordinate coordinate) {
|
|
uint16_t data[3];
|
|
|
|
DataTransferBegin();
|
|
TERN_(TOUCH_BUTTONS_HW_SPI, SPIx.begin());
|
|
|
|
for (uint16_t i = 0; i < 3 ; i++) {
|
|
IO(coordinate);
|
|
data[i] = (IO() << 4) | (IO() >> 4);
|
|
}
|
|
|
|
TERN_(TOUCH_BUTTONS_HW_SPI, SPIx.end());
|
|
DataTransferEnd();
|
|
|
|
uint16_t delta01 = delta(data[0], data[1]),
|
|
delta02 = delta(data[0], data[2]),
|
|
delta12 = delta(data[1], data[2]);
|
|
|
|
if (delta01 > delta02 || delta01 > delta12)
|
|
data[delta02 > delta12 ? 0 : 1] = data[2];
|
|
|
|
return (data[0] + data[1]) >> 1;
|
|
}
|
|
|
|
uint16_t XPT2046::IO(uint16_t data) {
|
|
return TERN(TOUCH_BUTTONS_HW_SPI, HardwareIO, SoftwareIO)(data);
|
|
}
|
|
|
|
extern uint8_t spiTransfer(uint8_t b);
|
|
|
|
#if ENABLED(TOUCH_BUTTONS_HW_SPI)
|
|
uint16_t XPT2046::HardwareIO(uint16_t data) {
|
|
return SPIx.transfer(data & 0xFF);
|
|
}
|
|
#endif
|
|
|
|
uint16_t XPT2046::SoftwareIO(uint16_t data) {
|
|
uint16_t result = 0;
|
|
|
|
for (uint8_t j = 0x80; j; j >>= 1) {
|
|
WRITE(TOUCH_SCK_PIN, LOW);
|
|
WRITE(TOUCH_MOSI_PIN, data & j ? HIGH : LOW);
|
|
if (READ(TOUCH_MISO_PIN)) result |= j;
|
|
WRITE(TOUCH_SCK_PIN, HIGH);
|
|
}
|
|
WRITE(TOUCH_SCK_PIN, LOW);
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif // HAS_TFT_XPT2046
|
|
|