add mp3 player code

Code/MP3Player/config.h

@@ -0,0 +1,43 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+// GPIOs for SPI interface (SD card)
+#define SD_SPI0         0
+#define SD_SCLK_PIN     18
+#define SD_MOSI_PIN     19
+#define SD_MISO_PIN     16
+#define SD_CS_PIN       17
+
+#define LCD_SPI1    1
+#define LCD_SCK_PIN 10
+#define LCD_MOSI_PIN 11
+#define LCD_MISO_PIN 12
+#define LCD_CS_PIN 13
+#define LCD_DC_PIN 14
+#define LCD_RST_PIN 15
+
+// GPIOs for audio output
+#define AUDIO_LEFT     28
+#define AUDIO_RIGHT    27
+
+// GPIOs for buttons
+#define NEXT_BUTTON    2
+#define PART_BUTTON    3
+
+// Pico-internal GPIOs
+#define PICO_PS        23
+#define LED_PIN        25
+
+// Task stack sizes and priorities
+#define MAIN_STACKSIZE          6000
+#define MP3_DECODER_STACKSIZE   8200
+#define SD_READER_STACKSIZE      500
+#define MAIN_PRIORITY             50
+
+// Buffer sizes
+#define MP3_FRAME_SIZE 2881
+#define MP3_BUF_SIZE   4096
+
+#define MAX_FILES 64
+#define ITEMS_PER_PAGE 12
+#endif // CONFIG_H