Phase 2: LittleFS storage manager on /spiffs + shared SPI2_HOST bus

main/hw_pins.h

@@ -0,0 +1,38 @@
+/*
+ * MTG RFID Companion - Hardware pin assignments
+ *
+ * Do NOT change these unless explicitly instructed. SPI2_HOST (VSPI) is
+ * shared by the ST7789 display and the MFRC522 RFID reader.
+ */
+
+#pragma once
+
+#include "sdkconfig.h"
+#include "hal/gpio_types.h"
+#include "driver/spi_master.h"
+
+/* Shared SPI2_HOST (VSPI) bus */
+#define HW_SPI_HOST        (SPI2_HOST)
+#define HW_SPI_SCK_GPIO    (GPIO_NUM_18)
+#define HW_SPI_MOSI_GPIO   (GPIO_NUM_23)
+#define HW_SPI_MISO_GPIO   (GPIO_NUM_19)
+
+/* MFRC522 RFID reader */
+#define HW_RC522_CS_GPIO   (GPIO_NUM_5)
+#define HW_RC522_RST_GPIO  (GPIO_NUM_22)
+
+/* ST7789 display */
+#define HW_LCD_CS_GPIO     (GPIO_NUM_15)
+#define HW_LCD_DC_GPIO     (GPIO_NUM_2)
+#define HW_LCD_RST_GPIO    (GPIO_NUM_4)
+
+/* EC11 rotary encoder */
+#define HW_ENC_CLK_GPIO    (GPIO_NUM_32)
+#define HW_ENC_DT_GPIO     (GPIO_NUM_33)
+#define HW_ENC_SW_GPIO     (GPIO_NUM_25)
+
+/* WS2812B Neopixel */
+#define HW_NEOPIXEL_GPIO   (GPIO_NUM_27)
+
+/* Piezo buzzer */
+#define HW_BUZZER_GPIO     (GPIO_NUM_14)