rp2/network: Add USB Network support in RPI_PICO/USB_NET variant build.

Signed-off-by: Andrew Leech <[email protected]>

Author: pi-anl

ports/rp2/boards/RPI_PICO/board.json

@@ -15,5 +15,8 @@
     "product": "Pico",
     "thumbnail": "",
     "url": "https://www.raspberrypi.com/products/raspberry-pi-pico/",
+    "variants": {
+        "USB_NET": "USB Network Adapter"
+    },
     "vendor": "Raspberry Pi"
 }

ports/rp2/boards/RPI_PICO/mpconfigboard.h

@@ -1,3 +1,9 @@
 // Board and hardware specific configuration
 #define MICROPY_HW_BOARD_NAME                   "Raspberry Pi Pico"
 #define MICROPY_HW_FLASH_STORAGE_BYTES          (1408 * 1024)
+
+#if MICROPY_PY_LWIP
+// Enable networking.
+#define MICROPY_PY_NETWORK 1
+#define MICROPY_PY_NETWORK_HOSTNAME_DEFAULT     "Pico"
+#endif

ports/rp2/boards/RPI_PICO/mpconfigvariant.cmake

@@ -0,0 +1 @@
+set(MICROPY_PY_LWIP OFF)

ports/rp2/boards/RPI_PICO/mpconfigvariant_USB_NET.cmake

@@ -0,0 +1,7 @@
+set(MICROPY_PY_LWIP ON)
+
+list(APPEND MICROPY_DEF_BOARD
+    MICROPY_HW_NETWORK_USBNET=1
+)
+# Board specific version of the frozen manifest
+set(MICROPY_FROZEN_MANIFEST ${MICROPY_BOARD_DIR}/../RPI_PICO_W/manifest.py)

ports/rp2/mpconfigport.h

@@ -273,6 +273,13 @@ extern const struct _mp_obj_type_t mod_network_nic_type_wiznet5k;
 #define MICROPY_HW_NIC_WIZNET5K
 #endif
 
+#if MICROPY_HW_NETWORK_USBNET
+extern const struct _mp_obj_type_t mod_network_nic_type_usbnet;
+#define MICROPY_HW_NIC_USBNET             { MP_ROM_QSTR(MP_QSTR_USB_NET), MP_ROM_PTR(&mod_network_nic_type_usbnet) },
+#else
+#define MICROPY_HW_NIC_USBNET
+#endif
+
 #ifndef MICROPY_BOARD_NETWORK_INTERFACES
 #define MICROPY_BOARD_NETWORK_INTERFACES
 #endif
@@ -281,6 +288,7 @@ extern const struct _mp_obj_type_t mod_network_nic_type_wiznet5k;
     MICROPY_HW_NIC_CYW43 \
     MICROPY_HW_NIC_NINAW10  \
     MICROPY_HW_NIC_WIZNET5K \
+    MICROPY_HW_NIC_USBNET \
     MICROPY_BOARD_NETWORK_INTERFACES \
 
 // Additional entries for use with pendsv_schedule_dispatch.

ports/rp2/mpnetworkport.c

@@ -30,6 +30,7 @@
 
 #if MICROPY_PY_LWIP
 
+#include "extmod/network_usbd_ncm.h"
 #include "shared/runtime/softtimer.h"
 #include "lwip/timeouts.h"
 
@@ -137,6 +138,10 @@ static void mp_network_soft_timer_callback(soft_timer_entry_t *self) {
     #if MICROPY_PY_NETWORK_WIZNET5K
     wiznet5k_poll();
     #endif
+
+    #if MICROPY_HW_NETWORK_USBNET
+    network_usbd_ncm_service_traffic();
+    #endif
 }
 
 void mod_network_lwip_init(void) {