// Copyright (c) 2023 Cesanta Software Limited // All rights reserved #include #include #include "hardware/spi.h" #include "pico/rand.h" #include "pico/stdlib.h" #include "pico/unique_id.h" #include "mongoose.h" #include "net.h" enum { BLINK_PERIOD_MS = 1000 }; enum { LED = 25, SPI_CS = 17, SPI_CLK = 18, SPI_TX = 19, SPI_RX = 16 }; // Pins static void spi_begin(void *spi) { gpio_put(SPI_CS, 0); } static void spi_end(void *spi) { gpio_put(SPI_CS, 1); } static uint8_t spi_txn(void *spi, uint8_t byte) { uint8_t result = 0; spi_write_read_blocking(spi0, &byte, &result, 1); return result; } void mg_random(void *buf, size_t len) { for (size_t n = 0; n < len; n += sizeof(uint32_t)) { uint32_t r = get_rand_32(); memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r)); } } static void timer_fn(void *arg) { gpio_put(PICO_DEFAULT_LED_PIN, !gpio_get_out_level(PICO_DEFAULT_LED_PIN)); // Blink LED struct mg_tcpip_if *ifp = arg; // And show const char *names[] = {"down", "up", "req", "ready"}; // network stats MG_INFO(("Ethernet: %s, IP: %M, rx:%u, tx:%u, dr:%u, er:%u", names[ifp->state], mg_print_ip4, &ifp->ip, ifp->nrecv, ifp->nsent, ifp->ndrop, ifp->nerr)); } static void eth_spi_init(void) { // Init SPI pins spi_init(spi0, 500 * 1000); gpio_set_function(SPI_RX, GPIO_FUNC_SPI); // MISO gpio_set_function(SPI_TX, GPIO_FUNC_SPI); // MOSI gpio_set_function(SPI_CLK, GPIO_FUNC_SPI); // CLK gpio_init(SPI_CS); // CS gpio_set_dir(SPI_CS, GPIO_OUT); // Set CS to output gpio_put(SPI_CS, 1); // And drive CS high (inactive) } // Helper macro for MAC generation #define GENERATE_LOCALLY_ADMINISTERED_MAC(id) \ { 2, id[3], id[4], id[5], id[6], id[7] } int main(void) { stdio_init_all(); gpio_init(LED); // Setup board LED gpio_set_dir(LED, GPIO_OUT); eth_spi_init(); // Initialise SPI pins MG_INFO(("Starting ...")); pico_unique_board_id_t board_id; pico_get_unique_board_id(&board_id); uint8_t *id = board_id.id; struct mg_mgr mgr; // Initialise mg_mgr_init(&mgr); // Mongoose event manager mg_log_set(MG_LL_DEBUG); // Set log level // Initialise Mongoose network stack // Specify MAC address, and IP/mask/GW in network byte order for static // IP configuration. If IP/mask/GW are unset, DHCP is going to be used struct mg_tcpip_spi spi = {NULL, spi_begin, spi_end, spi_txn}; struct mg_tcpip_if mif = {.mac = GENERATE_LOCALLY_ADMINISTERED_MAC(id), .driver = &mg_tcpip_driver_w5500, .driver_data = &spi}; mg_tcpip_init(&mgr, &mif); mg_timer_add(&mgr, BLINK_PERIOD_MS, MG_TIMER_REPEAT, timer_fn, &mif); MG_INFO(("MAC: %M. Waiting for IP...", mg_print_mac, mif.mac)); while (mif.state != MG_TCPIP_STATE_READY) { mg_mgr_poll(&mgr, 0); } MG_INFO(("Initialising application...")); web_init(&mgr); MG_INFO(("Starting event loop")); for (;;) { mg_mgr_poll(&mgr, 1); } return 0; }