add initial framework

usbhid.c

@@ -0,0 +1,33 @@
+
+#include <stdint.h>
+
+#include "usbhid.h"
+#include "udp_bridge.h"
+
+
+static int serverfd = 0;
+
+void usbhid_init()
+{
+    // just bridge to UDP for now for pure software testing
+    serverfd = udp_server();
+}
+
+
+// Receive 64 byte USB HID message
+void usbhid_recv(uint8_t * msg)
+{
+    udp_recv(serverfd, msg, HID_MESSAGE_SIZE);
+}
+
+
+// Send 64 byte USB HID message
+void usbhid_send(uint8_t * msg)
+{
+    udp_send(serverfd, msg, HID_MESSAGE_SIZE);
+}
+
+void usbhid_close()
+{
+    udp_close(serverfd);
+}