SAME54 Ethernet driver

examples/microchip/same54/main.c

@@ -0,0 +1,77 @@
+// SPDX-FileCopyrightText: 2022-2023 Cesanta Software Limited
+// SPDX-License-Identifier: MIT
+
+#include "hal.h"
+#include "mongoose.h"
+#include "net.h"
+
+#define BLINK_PERIOD_MS 500  // LED blinking period in millis
+#define LOG_PERIOD_MS 1000   // Info log period in millis
+
+void SystemInit(void) {  // Called automatically by startup code
+  clock_init();
+}
+
+static volatile uint64_t s_ticks;  // Milliseconds since boot
+void SysTick_Handler(void) {       // SyStick IRQ handler, triggered every 1ms
+  s_ticks++;
+}
+
+uint64_t mg_millis(void) {  // Let Mongoose use our uptime function
+  return s_ticks;           // Return number of milliseconds since boot
+}
+
+void mg_random(void *buf, size_t len) {  // Use on-board RNG
+  for (size_t n = 0; n < len; n += sizeof(uint32_t)) {
+    uint32_t r = rng_read();
+    memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r));
+  }
+}
+
+static void timer_fn(void *arg) {
+  struct mg_tcpip_if *ifp = arg;  // show network stats
+  const char *names[] = {"down", "up", "req", "ready"};
+  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));
+}
+
+int main(void) {
+  gpio_input(BUTTON_PIN);
+  gpio_output(LED_PIN);
+  uart_init(UART_DEBUG, 115200);
+  rng_init();
+
+  MG_INFO(("Starting, CPU freq %g MHz", (double) clock_sys_freq() / 1000000));
+
+  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
+  struct mg_tcpip_driver_same54_data driver_data = {.mdc_cr = 4};
+  struct mg_tcpip_if mif = {.mac = {0x02, 0x14, 0x30, 0x00, 0x1a, 0x00},
+                            // Uncomment below for static configuration:
+                            // .ip = mg_htonl(MG_U32(192, 168, 0, 223)),
+                            // .mask = mg_htonl(MG_U32(255, 255, 255, 0)),
+                            // .gw = mg_htonl(MG_U32(192, 168, 0, 1)),
+                            .driver = &mg_tcpip_driver_same54,
+                            .driver_data = &driver_data};
+  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, 0);
+  }
+
+  return 0;
+}