DESKTOP-PUHFO60\dsx2016
1381c221d9
Drop LVGL ROTATION_270 double-transform; SoftSPI rot3 maps directly to screen pixels. Co-authored-by: Cursor <cursoragent@cursor.com>
120 lines
3.1 KiB
C++
120 lines
3.1 KiB
C++
#include "touch.h"
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#include "pins.h"
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#include <Arduino.h>
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/**
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* SoftSPI XPT2046 — 与 SD 分脚
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*
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* 对齐官方 CYD LVGL9 例程（witnessmenow）：
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* - 显示直接建为 320x240，LVGL rotation=0（触控不再被二次变换）
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* - touch setRotation(3) + map 到 SCREEN_WIDTH/HEIGHT
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* 参考：https://github.com/witnessmenow/ESP32-Cheap-Yellow-Display/blob/main/Examples/LVGL9/
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*/
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int16_t g_dbg_phys_x = -1;
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int16_t g_dbg_phys_y = -1;
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int16_t g_dbg_logic_x = -1;
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int16_t g_dbg_logic_y = -1;
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bool g_dbg_touch_down = false;
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static void soft_write(uint8_t data) {
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for (int i = 7; i >= 0; --i) {
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digitalWrite(CYD_TOUCH_MOSI, (data >> i) & 1);
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digitalWrite(CYD_TOUCH_CLK, HIGH);
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delayMicroseconds(2);
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digitalWrite(CYD_TOUCH_CLK, LOW);
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delayMicroseconds(2);
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}
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}
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static uint16_t soft_read12() {
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uint16_t v = 0;
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digitalWrite(CYD_TOUCH_CLK, HIGH);
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delayMicroseconds(2);
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digitalWrite(CYD_TOUCH_CLK, LOW);
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delayMicroseconds(2);
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for (int i = 0; i < 12; ++i) {
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digitalWrite(CYD_TOUCH_CLK, HIGH);
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delayMicroseconds(2);
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v = (uint16_t)((v << 1) | (digitalRead(CYD_TOUCH_MISO) ? 1u : 0u));
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digitalWrite(CYD_TOUCH_CLK, LOW);
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delayMicroseconds(2);
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}
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return v;
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}
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static uint16_t xpt_read(uint8_t cmd) {
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digitalWrite(CYD_TOUCH_CS, LOW);
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soft_write(cmd);
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uint16_t v = soft_read12();
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digitalWrite(CYD_TOUCH_CS, HIGH);
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return v;
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}
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void touch_init() {
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pinMode(CYD_TOUCH_CS, OUTPUT);
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pinMode(CYD_TOUCH_CLK, OUTPUT);
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pinMode(CYD_TOUCH_MOSI, OUTPUT);
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pinMode(CYD_TOUCH_MISO, INPUT);
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pinMode(CYD_TOUCH_IRQ, INPUT);
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digitalWrite(CYD_TOUCH_CS, HIGH);
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digitalWrite(CYD_TOUCH_CLK, LOW);
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Serial.println("Touch: SoftSPI rot3 map 320x240 (no LVGL rot)");
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}
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void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
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uint16_t adc_x = xpt_read(0x90);
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uint16_t adc_y = xpt_read(0xD0);
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adc_x = (uint16_t)((adc_x + xpt_read(0x90)) / 2);
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adc_y = (uint16_t)((adc_y + xpt_read(0xD0)) / 2);
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const bool irq = (digitalRead(CYD_TOUCH_IRQ) == LOW);
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const bool in_range =
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(adc_x > 80 && adc_x < 4000 && adc_y > 80 && adc_y < 4000);
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if (!in_range || (!irq && (adc_x < 200 || adc_y < 200))) {
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data->state = LV_INDEV_STATE_RELEASED;
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g_dbg_touch_down = false;
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return;
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}
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// XPT2046_Touchscreen setRotation(3)：
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// xraw = 4095 - Y_sample, yraw = 4095 - X_sample
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const int16_t p_x = (int16_t)(4095 - adc_y);
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const int16_t p_y = (int16_t)(4095 - adc_x);
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int16_t x = map(p_x, 200, 3700, 1, SCREEN_WIDTH);
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int16_t y = map(p_y, 240, 3800, 1, SCREEN_HEIGHT);
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if (x < 0) {
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x = 0;
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}
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if (y < 0) {
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y = 0;
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}
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if (x >= SCREEN_WIDTH) {
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x = SCREEN_WIDTH - 1;
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}
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if (y >= SCREEN_HEIGHT) {
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y = SCREEN_HEIGHT - 1;
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}
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g_dbg_phys_x = p_x;
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g_dbg_phys_y = p_y;
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g_dbg_logic_x = x;
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g_dbg_logic_y = y;
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g_dbg_touch_down = true;
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static uint32_t last_log = 0;
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if (millis() - last_log > 120) {
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last_log = millis();
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Serial.printf("Touch adc(%u,%u) p(%d,%d) -> (%d,%d)\n", adc_x, adc_y, p_x,
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p_y, x, y);
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}
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data->point.x = x;
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data->point.y = y;
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data->state = LV_INDEV_STATE_PRESSED;
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}
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