Update USBD library to match USBFS API & support HID

Author: cheyao

examples_usb/USBD/usbd_cdc_tty/Makefile

@@ -4,6 +4,7 @@ TARGET:=usbd_cdc_tty
 TARGET_MCU:=CH32V208
 TARGET_MCU_PACKAGE:=CH32V208WBU6
 
+ADDITIONAL_C_FILES += ../../../extralibs/usbd.c
 include ../../../ch32fun/ch32fun.mk
 
 flash : cv_flash

examples_usb/USBD/usbd_cdc_tty/usb_config.h

@@ -4,10 +4,10 @@
 #include "funconfig.h"
 #include "ch32fun.h"
 
-#define FUSB_CONFIG_EPS       4 // Include EP0 in this count
-#define FUSB_EP1_MODE         1 // TX (IN)
-#define FUSB_EP2_MODE        -1 // RX (OUT)
-#define FUSB_EP3_MODE         1 // TX (IN)
+#define FUSB_BUFFERS_NUMBER   4 // Number of EP buffers (one for EP0, one per each IN/OUT, two for double)
+#define FUSB_EP1_MODE         USBD_EP_MODE_TX // IN
+#define FUSB_EP2_MODE         USBD_EP_MODE_RX // OUT
+#define FUSB_EP3_MODE         USBD_EP_MODE_TX // IN
 #define FUSB_USER_HANDLERS    1
 
 #include "usb_defines.h"

examples_usb/USBD/usbd_cdc_tty/usbd_cdc_tty.c

@@ -16,16 +16,9 @@ void blink(int n) {
 	}
 }
 
-// this is hacky, it implements the USBFS sender called in ch32fun.c
-// we do it like this for now, because the USBFS peripheral is preferred
-// over the USBD interface implemented here
-int USBFS_SendEndpointNEW( int endp, uint8_t* data, int len, int copy) {
-	return USBD_SendEndpoint(endp, data, len);
-}
-
 // this callback is mandatory when FUNCONF_USE_USBPRINTF is defined,
 // can be empty though
-void handle_usbd_input(int numbytes, uint8_t *data) {
+void HandleUSBInput(int numbytes, uint8_t *data) {
 	if(numbytes == 1) {
 		switch(data[0]) {
 		case '1':