Revamp rp examples

tutorials/rp/pico-rm2/main.c

@@ -0,0 +1,37 @@
+// Copyright (c) 2025 Cesanta Software Limited
+// All rights reserved
+
+#include "pico/stdlib.h"
+#include "mongoose.h"
+
+static void http_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
+  if (ev == MG_EV_HTTP_MSG) {  // New HTTP request received
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    uint64_t tick = to_ms_since_boot(get_absolute_time());
+    if (mg_match(hm->uri, mg_str("/api/tick"), NULL)) {
+      mg_http_reply(c, 200, "", "{%m:%llu}\n", MG_ESC("tick"), tick);
+    } else {
+      mg_http_reply(c, 200, "", "Hi from Mongoose, tick %llu\n", tick);
+    }
+  }
+}
+
+// In an RTOS environment, give this task 8 KB of stack space.
+static void run_mongoose(void) {
+  void driver_init(struct mg_mgr *mgr);
+  struct mg_mgr mgr;
+  mg_mgr_init(&mgr);
+  driver_init(&mgr);
+  mg_log_set(MG_LL_DEBUG);  // Set log level
+  MG_INFO(("Hardware initialised, starting firmware..."));
+  mg_http_listen(&mgr, "http://0.0.0.0", http_ev_handler, NULL);
+  for (;;) {
+    mg_mgr_poll(&mgr, 1);
+  }
+}
+
+int main(void) {
+  stdio_init_all();
+  run_mongoose();
+  return 0;
+}