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RP boards
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@@ -0,0 +1,16 @@
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cmake_minimum_required(VERSION 3.13)
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# If you will set board type here, do it BEFORE including the SDK
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# set(PICO_BOARD pico2_w)
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include(pico_sdk_import.cmake)
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project(firmware)
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pico_sdk_init()
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add_executable(firmware main.c mongoose.c)
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target_link_libraries(firmware pico_stdlib hardware_spi pico_rand hardware_flash pico_bootrom)
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pico_add_extra_outputs(firmware) # create map/bin/hex file etc.
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pico_enable_stdio_usb(firmware 1) # Route stdio
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# Prevent extreme optimization from breaking OTA
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target_compile_options(firmware PRIVATE -fno-tree-loop-distribute-patterns)
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@@ -0,0 +1,53 @@
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# Environment setup: https://mongoose.ws/docs/getting-started/build-environment/
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CWD ?= $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
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SDK_PATH ?= $(CWD)/pico-sdk
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RM = rm -rf
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MKBUILD = test -d build || mkdir build
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ifeq ($(OS),Windows_NT)
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RM = cmd /C del /Q /F /S
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MKBUILD = if not exist build mkdir build
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endif
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.PHONY: build
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all build: build/firmware.uf2
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build/firmware.uf2: pico_sdk_import.cmake mongoose.c mongoose.h
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pico_sdk_import.cmake: $(SDK_PATH)
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cp $(SDK_PATH)/external/$@ $@
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mongoose.c mongoose.h:
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cp ../../../$@ .
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build/firmware.uf2: $(SDK_PATH) $(wildcard *.[ch]) CMakeLists.txt Makefile
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$(MKBUILD)
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cd build && PICO_SDK_PATH=$(SDK_PATH) cmake -G "Unix Makefiles" .. && make
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flash: build/firmware.uf2
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picotool load $< -f
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clean:
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$(RM) build pico_sdk_import.cmake mongoose.c mongoose.h
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fullclean: clean
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$(RM) $(SDK_PATH)
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$(SDK_PATH):
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git clone -c advice.detachedHead=false --quiet --depth 1 -b 2.1.1 https://github.com/raspberrypi/pico-sdk $@
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cd $@ && git submodule update --quiet --init
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# Automated remote test. Requires env variable VCON_API_KEY set. See https://vcon.io/automated-firmware-tests/
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DEVICE_URL ?= https://dash.vcon.io/api/v3/devices/3
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# stdio has to be changed from USB to UART in CMakeLists.txt
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update:
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perl -pi -e 's/pico_enable_stdio_usb(firmware 1)/pico_enable_stdio_usb(firmware 0)/' CMakeLists.txt
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$(MAKE) build
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perl -pi -e 's/pico_enable_stdio_usb(firmware 0)/pico_enable_stdio_usb(firmware 1)/' CMakeLists.txt
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curl --fail-with-body -su :$(VCON_API_KEY) $(DEVICE_URL)/ota?uf2=1 --data-binary @build/firmware.uf2
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test: update
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curl --fail-with-body -su :$(VCON_API_KEY) $(DEVICE_URL)/tx?t=15 | tee /tmp/output.txt
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grep 'READY, IP:' /tmp/output.txt # Check for network init
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@@ -0,0 +1,92 @@
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// SPDX-FileCopyrightText: 2026 Cesanta Software Limited
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// SPDX-License-Identifier: GPL-2.0-only or commercial
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#include "hardware/spi.h"
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#include "pico/stdlib.h"
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#include "pico/unique_id.h"
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#include "mongoose.h"
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enum { SPI_CS = 17, SPI_CLK = 18, SPI_TX = 19, SPI_RX = 16 }; // Pins
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// enum { SPI_CS = 5, SPI_CLK = 2, SPI_TX = 3, SPI_RX = 4 }; // Pins
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void spi_begin(void *spi) {
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gpio_put(SPI_CS, 0);
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}
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void spi_end(void *spi) {
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gpio_put(SPI_CS, 1);
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}
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void spi_txn(void *spi, uint8_t *tx, uint8_t *rx, size_t len) {
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if (tx != NULL && rx != NULL) {
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spi_write_read_blocking(spi0, tx, rx, len);
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} else if (tx != NULL) {
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spi_write_blocking(spi0, tx, len);
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} else {
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spi_read_blocking(spi0, 0xFF, rx, len);
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}
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}
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static void ethernet_init(void) {
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// Init SPI pins
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spi_init(spi0, 500 * 1000);
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gpio_set_function(SPI_RX, GPIO_FUNC_SPI); // MISO
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gpio_set_function(SPI_TX, GPIO_FUNC_SPI); // MOSI
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gpio_set_function(SPI_CLK, GPIO_FUNC_SPI); // CLK
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gpio_init(SPI_CS); // CS
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gpio_set_dir(SPI_CS, GPIO_OUT); // Set CS to output
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gpio_put(SPI_CS, 1); // And drive CS high (inactive)
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}
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// Construct MAC address from the unique board ID
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void genmac(unsigned char *mac) {
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pico_unique_board_id_t board_id;
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pico_get_unique_board_id(&board_id);
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mac[0] = 2;
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memcpy(&mac[1], &board_id.id[3], 5);
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}
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static void blink_task(void) {
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static uint64_t timer;
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if (mg_timer_expired(&timer, 500, mg_now())) {
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gpio_put(PICO_DEFAULT_LED_PIN, !gpio_get(PICO_DEFAULT_LED_PIN));
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}
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}
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static void http_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
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if (ev == MG_EV_HTTP_MSG) { // New HTTP request received
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struct mg_http_message *hm = (struct mg_http_message *) ev_data;
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uint64_t tick = to_ms_since_boot(get_absolute_time());
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if (mg_match(hm->uri, mg_str("/api/tick"), NULL)) {
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mg_http_reply(c, 200, "", "{%m:%llu}\n", MG_ESC("tick"), tick);
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} else {
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mg_http_reply(c, 200, "", "Hi from Mongoose, tick %llu\n", tick);
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}
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}
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}
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// In an RTOS environment, give this task 8 KB of stack space.
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static void run_mongoose(void) {
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struct mg_mgr mgr;
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mg_mgr_init(&mgr);
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mg_http_listen(&mgr, "http://0.0.0.0", http_ev_handler, NULL);
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for (;;) {
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mg_mgr_poll(&mgr, 1);
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blink_task();
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}
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}
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int main(void) {
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stdio_init_all();
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gpio_init(PICO_DEFAULT_LED_PIN); // Initialise GPIO
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gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT); // Set as output
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gpio_put(PICO_DEFAULT_LED_PIN, 1);
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ethernet_init();
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MG_INFO(("Hardware initialised, starting firmware..."));
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run_mongoose();
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return 0;
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}
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@@ -0,0 +1,48 @@
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#pragma once
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// See https://mongoose.ws/documentation/#build-options
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#define MG_ARCH MG_ARCH_PICOSDK
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#define MG_OTA MG_OTA_PICOSDK
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#define MG_TLS MG_TLS_BUILTIN
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#define MG_IO_SIZE 2048
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#define MG_ENABLE_TCPIP 1
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#define MG_ENABLE_DRIVER_W5500 1
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// For static IP configuration, define MG_TCPIP_{IP,MASK,GW}
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// By default, those are set to zero, meaning that DHCP is used
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//
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// #define MG_TCPIP_IP MG_IPV4(192, 168, 1, 10)
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// #define MG_TCPIP_GW MG_IPV4(192, 168, 1, 1)
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// #define MG_TCPIP_MASK MG_IPV4(255, 255, 255, 0)
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// Set custom MAC address. By default, it is randomly generated
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// Using a build-time constant:
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// #define MG_SET_MAC_ADDRESS(mac) do { uint8_t buf_[6] = {2,3,4,5,6,7};
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// memmove(mac, buf_, sizeof(buf_)); } while (0)
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//
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// Using custom function:
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extern void genmac(unsigned char *mac);
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#define MG_SET_MAC_ADDRESS(mac) genmac(mac)
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// Hardware specific SPI support
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#include <stddef.h>
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#include <stdint.h>
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extern void spi_begin(void *);
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extern void spi_end(void *);
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extern void spi_txn(void *spi, uint8_t *tx, uint8_t *rx, size_t len);
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#define MG_TCPIP_DRIVER_INIT(mgr) \
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do { \
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static struct mg_tcpip_spi spi_ = {NULL, spi_begin, spi_end, spi_txn}; \
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static struct mg_tcpip_if mif_; \
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mif_.ip = MG_TCPIP_IP; \
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mif_.mask = MG_TCPIP_MASK; \
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mif_.gw = MG_TCPIP_GW; \
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mif_.driver = &mg_tcpip_driver_w5500; \
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mif_.driver_data = &spi_; \
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MG_SET_MAC_ADDRESS(mif_.mac); \
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mg_tcpip_init(mgr, &mif_); \
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MG_INFO(("Driver: W5500, MAC: %M", mg_print_mac, mif_.mac)); \
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} while (0)
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