Update HTTP server Arduino example

Author: cpq

examples/arduino/w5500-http/mongoose_config.h

@@ -13,5 +13,10 @@
 #define MG_ENABLE_DRIVER_W5500 1
 #define MG_ENABLE_TCPIP_DRIVER_INIT 0
 #define mkdir(a, b) (-1)
+#define MG_ENABLE_TCPIP_PRINT_DEBUG_STATS 0
+#define MG_ENABLE_CUSTOM_MILLIS 1
 #define MG_IO_SIZE 128
-//#define MG_ENABLE_LOG 0
+
+// Enable TLS
+// #define MG_TLS MG_TLS_BUILTIN
+// #define MG_ENABLE_CUSTOM_RANDOM 1

examples/arduino/w5500-http/w5500-http.ino

@@ -1,42 +1,36 @@
 #include <SPI.h>
 #include "mongoose.h"
 
-#define SS_PIN 17    // Slave select pin
-struct mg_mgr mgr;  // Mongoose event manager
+#define LED_PIN 21  // Slave select pin
+#define SS_PIN 17   // Slave select pin
+
 struct mg_tcpip_spi spi = {
-    NULL,                                               // SPI data
-    [](void *) { digitalWrite(SS_PIN, LOW); },          // begin transation
-    [](void *) { digitalWrite(SS_PIN, HIGH); },         // end transaction
-    [](void *, uint8_t c) { return SPI.transfer(c); },  // execute transaction
+    NULL,  // SPI metadata
+    [](void *) { digitalWrite(SS_PIN, LOW); SPI.beginTransaction(SPISettings()); },
+    [](void *) { digitalWrite(SS_PIN, HIGH); SPI.endTransaction(); },
+    [](void *, uint8_t c) { return SPI.transfer(c); }, // Execute transaction
 };
-struct mg_tcpip_if mif = {.mac = {2, 0, 1, 2, 3, 5}};  // network interface
+struct mg_mgr mgr;                                     // Mongoose event manager
+struct mg_tcpip_if mif = {.mac = {2, 0, 1, 2, 3, 5}};  // Network interface
+
+uint64_t mg_millis(void) {
+  return millis();
+}
 
 void setup() {
-  Serial.begin(115200);
-  mg_log_set_fn([](char ch, void *) { Serial.print(ch); }, NULL);
-  mg_log_set(MG_LL_DEBUG);
-  while (!Serial) (void) 0;
-
-  pinMode(SS_PIN, OUTPUT);
-  SPI.begin();
-
-  mg_mgr_init(&mgr);
-  // delay(3000);
-  MG_INFO(("Starting TCP/IP stack..."));
-  SPI.transfer(0);
-  MG_INFO(("--->..."));
-
-  mif.driver = &mg_tcpip_driver_w5500;
-  mif.driver_data = &spi;
-  mg_tcpip_init(&mgr, &mif);
-
-  // Start a 5 sec timer, print status message periodically
-  mg_timer_add(
-      &mgr, 5000, MG_TIMER_REPEAT,
-      [](void *) {
-        MG_INFO(("ethernet: %s", mg_tcpip_driver_w5500.up(&mif) ? "up" : "down"));
-      },
-      NULL);
+  Serial.begin(115200);       // Initialise serial
+  while (!Serial) delay(50);  // for debug output
+
+  SPI.begin();               // Iniitialise SPI
+  pinMode(SS_PIN, OUTPUT);   // to communicate with W5500 Ethernet module
+  pinMode(LED_PIN, OUTPUT);  // Initialise LED
+
+  mg_mgr_init(&mgr);        // Initialise Mongoose event manager
+  mg_log_set(MG_LL_DEBUG);  // Set debug log level
+  mg_log_set_fn([](char ch, void *) { Serial.print(ch); }, NULL);  // Log serial
+  mif.driver = &mg_tcpip_driver_w5500;  // Use W5500 built-in driver
+  mif.driver_data = &spi;               // Pass SPI interface to W5500 driver
+  mg_tcpip_init(&mgr, &mif);            // Initialise built-in TCP/IP stack
 
   // Setup HTTP listener. Respond "ok" on any HTTP request
   mg_http_listen(