Add USB Keyboard support

tusb_config.h

@@ -0,0 +1,46 @@
+#ifndef _TUSB_CONFIG_H_
+#define _TUSB_CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//--------------------------------------------------------------------+
+// COMMON CONFIGURATION
+//--------------------------------------------------------------------+
+#define CFG_TUSB_MCU                OPT_MCU_RP2040
+
+// Host Mode
+#define CFG_TUH_ENABLED             1
+
+// RHPort number used for Host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT            0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED         OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------+
+// HOST CONFIGURATION
+//--------------------------------------------------------------------+
+
+// Size of buffer to hold descriptors and other data used for enumeration
+#define CFG_TUH_ENUMERATION_BUFSIZE 256
+
+#define CFG_TUH_HUB                 1
+#define CFG_TUH_CDC                 0
+#define CFG_TUH_HID                 4 // typical number of HID devices
+#define CFG_TUH_MSC                 0
+#define CFG_TUH_VENDOR              0
+
+// max device support (excluding hub device)
+#define CFG_TUH_DEVICE_MAX          (CFG_TUH_HUB ? 4 : 1) // hub typically has 4 ports
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _TUSB_CONFIG_H_ */