renesas-ra: Add networking support using lwIP.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

ports/renesas-ra/Makefile

@@ -72,7 +72,7 @@ INC += -I$(TOP)/$(HAL_DIR)/ra/fsp/src/bsp/cmsis/Device/RENESAS/Include
 INC += -I$(TOP)/lib/tinyusb/hw
 INC += -I$(TOP)/lib/tinyusb/src
 INC += -I$(TOP)/shared/tinyusb
-#INC += -Ilwip_inc
+INC += -Ilwip_inc
 ifeq ($(CMSIS_MCU),$(filter $(CMSIS_MCU),RA4M1 RA4W1 RA6M1 RA6M2 RA6M5))
 INC += -Ira
 endif
@@ -305,6 +305,7 @@ SRC_C += \
 	ra_it.c \
 	rng.c \
 	mphalport.c \
+	mpnetworkport.c \
 	mpthreadport.c \
 	irq.c \
 	pendsv.c \

ports/renesas-ra/lwip_inc/arch/cc.h

@@ -0,0 +1,10 @@
+#ifndef MICROPY_INCLUDED_RP2_LWIP_ARCH_CC_H
+#define MICROPY_INCLUDED_RP2_LWIP_ARCH_CC_H
+
+#include <assert.h>
+#define LWIP_PLATFORM_DIAG(x)
+#define LWIP_PLATFORM_ASSERT(x)  { assert(1); }
+
+#define LWIP_NO_CTYPE_H 1
+
+#endif // MICROPY_INCLUDED_RP2_LWIP_ARCH_CC_H

ports/renesas-ra/lwip_inc/arch/sys_arch.h

@@ -0,0 +1 @@
+// empty

ports/renesas-ra/lwip_inc/lwipopts.h

@@ -0,0 +1,54 @@
+#ifndef MICROPY_INCLUDED_RA_LWIP_LWIPOPTS_H
+#define MICROPY_INCLUDED_RA_LWIP_LWIPOPTS_H
+
+#include <stdint.h>
+
+// This protection is not needed, instead protect lwIP code with flags
+#define SYS_ARCH_DECL_PROTECT(lev) do { } while (0)
+#define SYS_ARCH_PROTECT(lev) do { } while (0)
+#define SYS_ARCH_UNPROTECT(lev) do { } while (0)
+
+#define NO_SYS                          1
+#define SYS_LIGHTWEIGHT_PROT            1
+#define MEM_ALIGNMENT                   4
+
+#define LWIP_CHKSUM_ALGORITHM           3
+#define LWIP_CHECKSUM_CTRL_PER_NETIF    1
+
+#define LWIP_ARP                        1
+#define LWIP_ETHERNET                   1
+#define LWIP_RAW                        1
+#define LWIP_NETCONN                    0
+#define LWIP_SOCKET                     0
+#define LWIP_STATS                      0
+#define LWIP_NETIF_HOSTNAME             1
+
+#define LWIP_IPV6                       0
+#define LWIP_DHCP                       1
+#define LWIP_DHCP_CHECK_LINK_UP         1
+#define DHCP_DOES_ARP_CHECK             0 // to speed DHCP up
+#define LWIP_DNS                        1
+#define LWIP_DNS_SUPPORT_MDNS_QUERIES   1
+#define LWIP_MDNS_RESPONDER             1
+#define LWIP_IGMP                       1
+
+#define LWIP_NUM_NETIF_CLIENT_DATA      LWIP_MDNS_RESPONDER
+#define MEMP_NUM_UDP_PCB                (4 + LWIP_MDNS_RESPONDER)
+#define MEMP_NUM_SYS_TIMEOUT            (LWIP_NUM_SYS_TIMEOUT_INTERNAL + LWIP_MDNS_RESPONDER)
+
+#define SO_REUSE                        1
+#define TCP_LISTEN_BACKLOG              1
+
+extern uint32_t rng_read(void);
+#define LWIP_RAND() rng_read()
+
+// lwip takes 26700 bytes
+#define MEM_SIZE (8000)
+#define TCP_MSS (800)
+#define TCP_WND (8 * TCP_MSS)
+#define TCP_SND_BUF (8 * TCP_MSS)
+#define MEMP_NUM_TCP_SEG (32)
+
+typedef uint32_t sys_prot_t;
+
+#endif // MICROPY_INCLUDED_RA_LWIP_LWIPOPTS_H

ports/renesas-ra/main.c

@@ -63,10 +63,15 @@
 #include "rtc.h"
 #include "storage.h"
 #include "tusb.h"
+#if MICROPY_PY_LWIP
+#include "lwip/init.h"
+#include "lwip/apps/mdns.h"
+#endif
 #if MICROPY_PY_BLUETOOTH
 #include "mpbthciport.h"
 #include "extmod/modbluetooth.h"
 #endif
+#include "extmod/modnetwork.h"
 
 #define RA_EARLY_PRINT  1       /* for enabling mp_print in boardctrl. */
 
@@ -274,6 +279,16 @@ int main(void) {
 
     MICROPY_BOARD_BEFORE_SOFT_RESET_LOOP(&state);
 
+    #if MICROPY_PY_LWIP
+    // lwIP doesn't allow to reinitialise itself by subsequent calls to this function
+    // because the system timeout list (next_timeout) is only ever reset by BSS clearing.
+    // So for now we only init the lwIP stack once on power-up.
+    lwip_init();
+    #if LWIP_MDNS_RESPONDER
+    mdns_resp_init();
+    #endif
+    #endif
+
 soft_reset:
 
     MICROPY_BOARD_TOP_SOFT_RESET_LOOP(&state);
@@ -320,6 +335,14 @@ soft_reset:
     machine_i2s_init0();
     #endif
 
+    #if MICROPY_PY_NETWORK
+    mod_network_init();
+    #endif
+
+    #if MICROPY_PY_LWIP
+    mod_network_lwip_init();
+    #endif
+
     // Initialise the local flash filesystem.
     // Create it if needed, mount in on /flash, and set it as current dir.
     bool mounted_flash = false;
@@ -393,6 +416,9 @@ soft_reset_exit:
     #if MICROPY_PY_BLUETOOTH
     mp_bluetooth_deinit();
     #endif
+    #if MICROPY_PY_NETWORK
+    mod_network_deinit();
+    #endif
     soft_timer_deinit();
     timer_deinit();
     uart_deinit_all();

ports/renesas-ra/mpconfigport.h

@@ -126,6 +126,7 @@
 #define MICROPY_PY_TIME_GMTIME_LOCALTIME_MKTIME (1)
 #define MICROPY_PY_TIME_TIME_TIME_NS (1)
 #define MICROPY_PY_TIME_INCLUDEFILE "ports/renesas-ra/modtime.c"
+#define MICROPY_PY_LWIP_SOCK_RAW    (MICROPY_PY_LWIP)
 #ifndef MICROPY_PY_MACHINE
 #define MICROPY_PY_MACHINE          (1)
 #ifndef MICROPY_PY_MACHINE_BITSTREAM
@@ -168,6 +169,25 @@
 #define MICROPY_FATFS_MAX_SS           (FLASH_SECTOR_SIZE)
 #endif
 
+// By default networking should include sockets, ssl, websockets, webrepl, dupterm.
+#if MICROPY_PY_NETWORK
+#ifndef MICROPY_PY_NETWORK_HOSTNAME_DEFAULT
+#define MICROPY_PY_NETWORK_HOSTNAME_DEFAULT "mpy-ra"
+#endif
+#ifndef MICROPY_PY_USOCKET
+#define MICROPY_PY_USOCKET              (1)
+#endif
+#ifndef MICROPY_PY_USSL
+#define MICROPY_PY_USSL                 (1)
+#endif
+#ifndef MICROPY_PY_UWEBSOCKET
+#define MICROPY_PY_UWEBSOCKET           (1)
+#endif
+#ifndef MICROPY_PY_WEBREPL
+#define MICROPY_PY_WEBREPL              (1)
+#endif
+#endif
+
 #if MICROPY_PY_MACHINE
 #define MACHINE_BUILTIN_MODULE_CONSTANTS \
     { MP_ROM_QSTR(MP_QSTR_machine), MP_ROM_PTR(&mp_module_machine) },
@@ -181,6 +201,21 @@
 
 #define MP_STATE_PORT MP_STATE_VM
 
+#if MICROPY_PY_NETWORK_ESP_HOSTED
+extern const struct _mp_obj_type_t mod_network_esp_hosted_type;
+#define MICROPY_HW_NIC_ESP_HOSTED   { MP_ROM_QSTR(MP_QSTR_WLAN), MP_ROM_PTR(&mod_network_esp_hosted_type) },
+#else
+#define MICROPY_HW_NIC_ESP_HOSTED
+#endif
+
+#ifndef MICROPY_BOARD_NETWORK_INTERFACES
+#define MICROPY_BOARD_NETWORK_INTERFACES
+#endif
+
+#define MICROPY_PORT_NETWORK_INTERFACES \
+    MICROPY_HW_NIC_ESP_HOSTED \
+    MICROPY_BOARD_NETWORK_INTERFACES \
+
 // Miscellaneous settings
 
 #ifndef MICROPY_HW_USB_VID
@@ -269,6 +304,10 @@ static inline mp_uint_t disable_irq(void) {
 #define MICROPY_THREAD_YIELD()
 #endif
 
+#define MICROPY_PY_LWIP_ENTER
+#define MICROPY_PY_LWIP_REENTER
+#define MICROPY_PY_LWIP_EXIT
+
 #ifndef MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
 #define MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE (1)
 #endif

ports/renesas-ra/mpnetworkport.c

@@ -0,0 +1,74 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2023 Arduino SA
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/runtime.h"
+#include "py/mphal.h"
+#include "shared/runtime/softtimer.h"
+
+#if MICROPY_PY_LWIP
+
+#include "lwip/timeouts.h"
+
+static mp_sched_node_t network_poll_node;
+static soft_timer_entry_t network_timer;
+
+u32_t sys_now(void) {
+    return mp_hal_ticks_ms();
+}
+
+static void network_poll(mp_sched_node_t *node) {
+    // Run the lwIP internal updates
+    sys_check_timeouts();
+
+    #if MICROPY_PY_NETWORK_ESP_HOSTED
+    extern int esp_hosted_wifi_poll(void);
+    // Poll the NIC for incoming data
+    if (esp_hosted_wifi_poll() == -1) {
+        soft_timer_remove(&network_timer);
+    }
+    #endif
+}
+
+void mod_network_poll_events(void) {
+    mp_sched_schedule_node(&network_poll_node, network_poll);
+}
+
+static void network_timer_callback(soft_timer_entry_t *self) {
+    mod_network_poll_events();
+}
+
+void mod_network_lwip_init(void) {
+    static bool timer_started = false;
+    if (timer_started) {
+        soft_timer_remove(&network_timer);
+        timer_started = false;
+    }
+    // Start poll timer.
+    soft_timer_static_init(&network_timer, SOFT_TIMER_MODE_PERIODIC, 128, network_timer_callback);
+    soft_timer_reinsert(&network_timer, 128);
+    timer_started = true;
+}
+#endif // MICROPY_PY_LWIP