Add INMP441 WAV recorder for CYD 2.8/3.5.

Record 16 kHz mono PCM to microSD /rec, with level meter and DAC2 playback.

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

include/lv_conf.h

@@ -0,0 +1,86 @@
+#ifndef LV_CONF_H
+#define LV_CONF_H
+
+#include <stdint.h>
+
+#define LV_COLOR_DEPTH 16
+
+#define LV_MEM_SIZE (48 * 1024U)
+#define LV_DEF_REFR_PERIOD 16
+#define LV_DPI_DEF 130
+
+/* ESP32 无 Helium，关掉以免 .S 汇编被错误预处理 */
+#define LV_USE_DRAW_SW_ASM LV_DRAW_SW_ASM_NONE
+
+#define LV_USE_OS LV_OS_NONE
+#define LV_USE_STDLIB_MALLOC LV_STDLIB_BUILTIN
+#define LV_USE_STDLIB_STRING LV_STDLIB_BUILTIN
+#define LV_USE_STDLIB_SPRINTF LV_STDLIB_BUILTIN
+
+#define LV_USE_LOG 0
+#define LV_USE_ASSERT_NULL 1
+#define LV_USE_ASSERT_MALLOC 1
+
+#define LV_FONT_MONTSERRAT_12 1
+#define LV_FONT_MONTSERRAT_14 1
+#define LV_FONT_MONTSERRAT_16 1
+#define LV_FONT_MONTSERRAT_20 1
+#define LV_FONT_MONTSERRAT_24 1
+#define LV_FONT_MONTSERRAT_28 1
+#define LV_FONT_MONTSERRAT_32 1
+#define LV_FONT_MONTSERRAT_40 1
+#define LV_FONT_DEFAULT &lv_font_montserrat_14
+
+#define LV_USE_FLOAT 1
+#define LV_USE_MATRIX 0
+
+#define LV_USE_LABEL 1
+#define LV_LABEL_TEXT_SELECTION 0
+#define LV_LABEL_LONG_TXT_HINT 1
+
+#define LV_USE_ARC 1
+#define LV_USE_BAR 1
+#define LV_USE_BTN 1
+#define LV_USE_BUTTON 1
+#define LV_USE_IMG 1
+#define LV_USE_IMAGE 1
+#define LV_USE_LINE 1
+#define LV_USE_SLIDER 1
+#define LV_USE_SWITCH 1
+#define LV_USE_TEXTAREA 0
+#define LV_USE_CHECKBOX 0
+#define LV_USE_DROPDOWN 0
+#define LV_USE_ROLLER 0
+#define LV_USE_TABLE 0
+#define LV_USE_CALENDAR 0
+#define LV_USE_CHART 1
+#define LV_USE_KEYBOARD 0
+#define LV_USE_LIST 0
+#define LV_USE_MENU 0
+#define LV_USE_MSGBOX 0
+#define LV_USE_SPAN 0
+#define LV_USE_SPINBOX 0
+#define LV_USE_SPINNER 1
+#define LV_USE_TABVIEW 0
+#define LV_USE_TILEVIEW 0
+#define LV_USE_WIN 0
+#define LV_USE_LED 1
+#define LV_USE_SCALE 1
+
+#define LV_USE_THEME_DEFAULT 1
+#define LV_THEME_DEFAULT_DARK 1
+#define LV_THEME_DEFAULT_GROW 0
+#define LV_THEME_DEFAULT_TRANSITION_TIME 80
+
+#define LV_USE_FLEX 1
+#define LV_USE_GRID 1
+
+#define LV_USE_TFT_ESPI 1
+
+#define LV_USE_OBSERVER 0
+#define LV_USE_SYSMON 0
+#define LV_USE_PROFILER 0
+#define LV_USE_DEMO_WIDGETS 0
+#define LV_USE_DEMO_BENCHMARK 0
+
+#endif /* LV_CONF_H */

include/pins.h

@@ -0,0 +1,37 @@
+#pragma once
+
+/* CYD + INMP441 record pin truth — see ../CYD_PROJECT_GUIDE.md */
+
+#if defined(CYD_BOARD_3248S035)
+  /* 3.5C ESP32-3248S035C: BL=27; free peripheral pair is 22+21 */
+  #define TFT_BL_PIN 27
+  #define I2S_WS_PIN 22
+  #define I2S_SCK_PIN 21
+  #define I2S_SD_PIN 35
+  #define SCREEN_WIDTH 480
+  #define SCREEN_HEIGHT 320
+  #define CYD_GT911_SDA 33
+  #define CYD_GT911_SCL 32
+  #define CYD_GT911_INT 21
+  #define CYD_GT911_RST 25
+#else
+  /* 2.8 ESP32-2432S028R: BL=21; free peripheral pair is 22+27; SD on P3 IO35 */
+  #define TFT_BL_PIN 21
+  #define I2S_WS_PIN 22
+  #define I2S_SCK_PIN 27
+  #define I2S_SD_PIN 35
+  #define SCREEN_WIDTH 320
+  #define SCREEN_HEIGHT 240
+  #define CYD_TOUCH_IRQ 36
+  #define CYD_TOUCH_MOSI 32
+  #define CYD_TOUCH_MISO 39
+  #define CYD_TOUCH_CLK 25
+  #define CYD_TOUCH_CS 33
+#endif
+
+/* On-board microSD (VSPI) + speaker amp (DAC2 only — never GPIO25) */
+#define SD_MISO 19
+#define SD_MOSI 23
+#define SD_SCK 18
+#define SD_CS 5
+#define SPEAKER_PIN 26

include/player.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <stdint.h>
+
+void player_init(void);
+bool player_play(const char *path);
+void player_stop(void);
+bool player_is_playing(void);
+const char *player_status(void);
+void player_tick(void); /* stream next chunk to DAC */

include/recorder.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdint.h>
+
+#define REC_SAMPLE_RATE 16000
+#define REC_MAX_SECONDS 120
+
+bool recorder_mic_init(void);
+bool recorder_start(void);
+void recorder_stop(void);
+bool recorder_is_active(void);
+float recorder_level_db(void);          /* smoothed approx dBFS+offset, or NAN */
+uint32_t recorder_elapsed_ms(void);
+uint32_t recorder_bytes_written(void);
+const char *recorder_last_path(void);   /* e.g. /rec/R0003.WAV */
+const char *recorder_status(void);
+void recorder_tick(void);               /* call from loop; drains I2S → SD */

include/sdcard.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdint.h>
+
+bool sd_init(void);
+void sd_deinit(void);
+bool sd_ready(void);
+uint64_t sd_free_bytes(void);
+uint64_t sd_total_bytes(void);

include/touch.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <lvgl.h>
+
+void touch_init();
+void touch_read_cb(lv_indev_t *indev, lv_indev_data_t *data);