Fix double touch rotation so bottom LVGL buttons receive hits.

Report physical 240x320 coordinates and let LVGL apply ROTATION_270.

Co-authored-by: Cursor <cursoragent@cursor.com>

CHANGELOG.md

@@ -1,9 +1,14 @@
 # Changelog
 
+## 2026-10-17 — Fix touch Y (buttons dead zone)
+
+- Root cause: feeding already-landscape 320x240 points while LVGL also applies
+  ROTATION_270 (double transform) → only upper ~1/3 hit-tested correctly.
+- Fix: report physical 240x320 coords; let LVGL rotate (matches `lv_indev.c`).
+
 ## 2026-10-17 — Restore LVGL touch
 
 - SoftSPI + LVGL `lv_indev` (with `lv_indev_set_display`).
-- Same landscape map as `temperature`; IRQ optional (sample-range fallback).
 - Larger clickable speaker/play buttons.
 
 ## 2026-10-17 — Fix touch offset

firmware/cyd/VERSION.txt

@@ -1,5 +1,5 @@
 name: CYD TF card + touch speaker (cyd)
-git: fe4b085
+git: 36bf614
 date: 2026-10-17
 board: ESP32-2432S028R (ILI9341)
 features: TF/SD info, SoftSPI touch, GPIO26 speaker
@@ -12,5 +12,5 @@ offsets:
 sha256:
   bootloader.bin  3D234A7471F67B013686DABD4DEE7C1FA915C9928463616A94BC9297ACF1ABF8
   boot_app0.bin   F94C5D786A7A8FAB06AC5D10E33BF37711A6697636DC037559EA19CC410A17F0
-  firmware.bin    6EA45305C88045B6ECBA897D200294C05570C19619F498BE25B57C2419B94DC4
+  firmware.bin    5AFF818CB116CF68761168F931E9B9B5EB1B39AA0CFE40D79815BF85F0E2B007
   partitions.bin  148B959CBFF1C38AA8E1D5C0BA9D612C54997B945E56A63F41223EEF650653A1

src/touch.cpp

@@ -4,8 +4,11 @@
 #include <Arduino.h>
 
 /**
- * SoftSPI XPT2046 → LVGL pointer indev
- * 读数用简单稳定协议（此前能点到）；坐标变换对齐 temperature（rot2 + map 320x240）。
+ * SoftSPI XPT2046 → LVGL indev
+ *
+ * 关键：必须上报与 lv_tft_espi_create(240,320) 一致的【物理竖屏】坐标。
+ * LVGL 在 ROTATION_270 时会自己做镜像+交换（见 lv_indev.c indev_pointer_proc）。
+ * 若再 map 成 320x240，等于旋转两次，就会出现「只有上 1/3 有反应、底部按钮点不到」。
  */
 
 static void soft_write(uint8_t data) {
@@ -50,11 +53,10 @@ void touch_init() {
   pinMode(CYD_TOUCH_IRQ, INPUT);
   digitalWrite(CYD_TOUCH_CS, HIGH);
   digitalWrite(CYD_TOUCH_CLK, LOW);
-  Serial.println("Touch: LVGL indev SoftSPI");
+  Serial.println("Touch: physical 240x320 for LVGL rotation");
 }
 
 void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
-  // 不依赖 IRQ（部分板子 IRQ 不可靠）：用采样有效性判断
   uint16_t raw_x = xpt_read(0x90);
   uint16_t raw_y = xpt_read(0xD0);
   raw_x = (uint16_t)((raw_x + xpt_read(0x90)) / 2);
@@ -64,18 +66,24 @@ void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
   const bool in_range =
       (raw_x > 80 && raw_x < 4000 && raw_y > 80 && raw_y < 4000);
 
-  if (!in_range || (!irq && (raw_x < 200 || raw_y < 200))) {
+  if (!in_range) {
+    data->state = LV_INDEV_STATE_RELEASED;
+    return;
+  }
+  // 无 IRQ 时仍允许（部分板 IRQ 不可靠），但过滤空闲噪声
+  if (!irq && (raw_x < 150 || raw_y < 150)) {
     data->state = LV_INDEV_STATE_RELEASED;
     return;
   }
 
-  // XPT2046_Touchscreen setRotation(2)
+  // XPT2046_Touchscreen setRotation(2) 等价变换
   const int16_t p_x = (int16_t)raw_x;
   const int16_t p_y = (int16_t)(4095 - raw_y);
 
-  // temperature 横屏逻辑坐标（UI 320x240）
-  int16_t x = map(p_y, 240, 3800, 1, UI_HOR_RES);
-  int16_t y = map(p_x, 200, 3700, UI_VER_RES, 1);
+  // 物理竖屏：宽 SCREEN_WIDTH=240，高 SCREEN_HEIGHT=320
+  // （与 create(240,320) 的 disp->hor_res / ver_res 一致，供 LVGL 再旋转）
+  int16_t x = map(p_x, 200, 3700, 0, SCREEN_WIDTH - 1);
+  int16_t y = map(p_y, 240, 3800, 0, SCREEN_HEIGHT - 1);
 
   if (x < 0) {
     x = 0;
@@ -83,18 +91,18 @@ void touch_read_cb(lv_indev_t * /*indev*/, lv_indev_data_t *data) {
   if (y < 0) {
     y = 0;
   }
-  if (x >= UI_HOR_RES) {
-    x = UI_HOR_RES - 1;
+  if (x >= SCREEN_WIDTH) {
+    x = SCREEN_WIDTH - 1;
   }
-  if (y >= UI_VER_RES) {
-    y = UI_VER_RES - 1;
+  if (y >= SCREEN_HEIGHT) {
+    y = SCREEN_HEIGHT - 1;
   }
 
   static uint32_t last_log = 0;
-  if (millis() - last_log > 250) {
+  if (millis() - last_log > 200) {
     last_log = millis();
-    Serial.printf("LVGL touch irq=%d raw(%u,%u) -> (%d,%d)\n", irq ? 1 : 0, raw_x,
-                  raw_y, x, y);
+    Serial.printf("Touch phys(%d,%d) raw(%u,%u) irq=%d\n", x, y, raw_x, raw_y,
+                  irq ? 1 : 0);
   }
 
   data->point.x = x;