add mp3 player code

Code/MP3Player/i2ckbd.h

@@ -0,0 +1,29 @@
+#ifndef _I2C_KBD_H
+#define _I2C_KBD_H
+
+#include "task.h"
+#include "gpio_rp2040.h"
+#include "i2c_rp2040.h"
+
+#define I2C_KBD_MOD 1
+#define I2C_KBD_SDA 6
+#define I2C_KBD_SCL 7
+#define I2C_KBD_SPEED  400000
+#define I2C_KBD_ADDR  0x1F
+
+class i2c_kbd {
+public:
+    i2c_kbd();
+
+    int write_i2c_kbd();
+    int read_i2c_kbd();
+    int I2C_Send_RegData(int i2caddr, int reg, char command);
+
+    virtual ~i2c_kbd();
+private:
+     i2c_rp2040 _master;
+     int c;
+     int _stat;
+};
+
+#endif