How to fix the esp-open-lwip's compile-error?

[TridentTD]

I have already built the esp-open-sdk's toolchain , it looks fine. When compiling the example's blinky, it's ok.

However when I tried to compile this repo esp-open-lwip, it occurs some errors as the following..

I don't know much about Makefile. How to fix this error for compiling this repo's esp-open-lwip ?

Thank you very much.

[martin-ger]

Do the 'make' in the parent directory 'esp-open-skd'. It will decend into the 'esp-open-lwip'.

[TridentTD]

Thank you very much for the answer.

[TridentTD]

Now esp-open-lwip can be compiled well.

Another question, if I would like to compile with loopback too, How to config this option for esp-open-lwip ?

Thank you.

[martin-ger]

The support for a loopback device should be included in the default config. See here: https://github.com/martin-ger/esp-open-lwip/blob/enc_polling/include/lwipopts.h#L1217

How to set it up (and process it) - look here: https://github.com/martin-ger/esp_wifi_repeater/blob/master/user/user_main.c for the line with '#if HAVE_LOOPBACK'.

[TridentTD]

I would like to ping 127.0.0.1 on Arduino by lwip_xxx.a with loopback compiled .

I have just tested by the following code.

#include <ESP8266WiFi.h>
#include "user_interface.h"
#include "ping.h"
#include "lwip/netif.h"

/*****************************
 * define & typedef
 *****************************/
#define  SSID         "--------------"
#define  PASSWORD     "--------------"

typedef enum {
  SIG_DO_NOTHING = 0, SIG_START_SERVER = 1, SIG_SEND_DATA, SIG_UART0, SIG_CONSOLE_RX, SIG_CONSOLE_TX, SIG_CONSOLE_TX_RAW, SIG_GPIO_INT, SIG_LOOPBACK
} USER_SIGNALS;

/* System Task, for USER_SIGNALS  */
#define user_procTaskPrio 0
#define user_procTaskQueueLen 2

static os_event_t user_procTaskQueue[user_procTaskQueueLen];

/*****************************
 * static function prototype
 *****************************/
static void user_procTask(os_event_t *events);
static void  *schedule_netif_poll(struct netif *netif);
static void esp_ping(IPAddress ip);

/*****************************
 * Arduino's setup() & loop()
 *****************************/
void setup() {
  Serial.begin(115200); Serial.println();

  // loopback poll
  loopback_netif_init((netif_status_callback_fn)schedule_netif_poll);
  system_os_task(user_procTask, user_procTaskPrio, user_procTaskQueue, user_procTaskQueueLen);

  WiFi.begin(SSID, PASSWORD);
  while (!WiFi.isConnected()) { delay(400); Serial.print("."); }
  Serial.println();
  Serial.print("STA IP : "); Serial.println(WiFi.localIP());

  esp_ping(IPAddress(127, 0, 0, 1));
}

void loop() {
  // put your main code here, to run repeatedly:

}

/*****************************
 * static functions
 *****************************/
static void ICACHE_FLASH_ATTR *schedule_netif_poll(struct netif *netif)
{
  system_os_post(0, SIG_LOOPBACK, (ETSParam)netif);
  return NULL;
}

//Priority 0 Task
static void ICACHE_FLASH_ATTR user_procTask(os_event_t *events)
{
  //os_printf("Sig: %d\r\n", events->sig);
  switch (events->sig)
  {
    case SIG_LOOPBACK:
      {
        Serial.printf("[%s@LINE_%d] SIG_LOOPBACK\n", __func__ , __LINE__);
        struct netif *netif = (struct netif *)events->par;
        netif_poll(netif);
      }
      break;
  }
}

static void esp_ping(IPAddress ip) {
  static struct ping_option  ping_opt;

  ping_opt.count        = 4;
  ping_opt.coarse_time  = 1;
  ping_opt.ip           = ip.v4();

  ping_regist_recv(&ping_opt, [](void* arg, void *pdata) {
    struct ping_option* ping_opt = (struct ping_option*) arg;
    struct ping_resp *  ping_res = (struct ping_resp*) pdata;

    if (ping_res->ping_err == -1) {
      Serial.printf("Reply from %s : offline\n",
                    IPAddress(ping_opt->ip).toString().c_str() );
    } else {
      Serial.printf("Reply from %s : bytes = %d time = %d ms\n",
                    IPAddress(ping_opt->ip).toString().c_str(),
                    ping_res->bytes, ping_res->resp_time);
    }
  });

  ping_start(&ping_opt);
}

However the result as the following .

What's wrong about the Arduino's loopback code? Do you mind to advise, how to fix this issue?

Thank you.

[martin-ger]

Hmm, no real idea. Looks fine so far. It probably doesn't change anything if you put the 'netif_poll(netif)' in the loop() function?

Does a ping on the other netifs work?