Added some comments and advanced version number.

src/config

@@ -1,4 +1,4 @@
 CONFIG_VERSION="0.1.7e-usb-v7"
-#CONFIG_FWVER=0x80000007
-CONFIG_FWVER=0x44534E53
+CONFIG_FWVER=0x80000007
+#CONFIG_FWVER=0x44534E53
 CONFIG_MCU_FOSC=12000000

src/usbinterface.c

@@ -228,6 +228,14 @@ void usbint_set_state(unsigned open) {
     connected = open;
 }
 
+// TODO: New Design
+// - Unify interrupt handler and RAM/FILE IO
+// - Add IRQ disable/enable to other code to protect against conflict
+// - Need dedicated file pointer since it is retained across interrupts.
+// - Figure out which operation still need to be part of the main loop (boot, reset, etc).
+// - Support multiple commands in IO commands in flight.
+// - Separate input/output USB IRQ disable.
+
 // collect a flit
 void usbint_recv_flit(const unsigned char *in, int length) {
     //if (!length) return;
@@ -271,6 +279,8 @@ void usbint_recv_flit(const unsigned char *in, int length) {
         // To avoid that we disable the handler here and let the menu loop re-enable it when we have it locked.
         if (!cmdDat_old && cmdDat) NVIC_DisableIRQ(USB_IRQn);
 
+        // FIXME: implement proper circular queue.
+
         // shift extra bytes down
         memmove((unsigned char*)recv_buffer, recv_buffer + size, recv_buffer_offset - size);
         recv_buffer_offset -= size;