---
title: "W5500 does not ping"
url: "https://maker.wiznet.io/forum/14392"
markdown_url: "https://maker.wiznet.io/forum/14392/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Orangeenush"
created: "2021-11-09T08:34:30+09:00"
last_activity: "2021-11-15T08:29:23+09:00"
language: "en"
views: 1374
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5500 does not ping

## Question

Asked by Orangeenush on 2021-11-09 in Ethernet Chips.

Hello!
I am using Wiz550io V1.3 together with STM32F401 DISCOVERY. I use CubeMX32 and IAR EW for ARM. I want to ping the module, but I don’t get a response from it. My code:

/* USER CODE BEGIN Includes */
#include “stm32f4xx_hal.h”
#include “wizchip_conf.h”
#include “socket.h”
#include “loopback.h”
#define HTTP_SOCKET 1
#define SOCK_TCPS 0
#define PORT_TCPS 5000
#define DATA_BUF_SIZE 2048
uint8_t gDATABUF[DATA_BUF_SIZE];
uint8_t buf[2] = {0x00, 0x00};
uint8_t buf_mac[6] = {0,0,0,0,0,0};
uint8_t* pbuf_mac = &buf_mac[0];
uint8_t buf_ip[4] = {0,0,0,0};
uint8_t* pbuf_ip = &buf_ip[0];
uint8_t buf_mask[4] = {0,0,0,0};
uint8_t* pbuf_mask = &buf_mask[0];
uint8_t buf_gate[4] = {0,0,0,0};
uint8_t* pbuf_gate = &buf_gate[0];
uint8_t buf_dns[4] = {0,0,0,0};
uint8_t* pbuf_dns = &buf_dns[0];
uint8_t myip[7] = {0x00, 0x0F, 0x04, 0xC0, 0xA8, 0x2D, 0x0C};
uint8_t mymac[9] = {0x00, 0x09, 0x00, 0x00, 0x08, 0xDC, 0x5F, 0x39, 0x4C};
/* USER CODE END Includes */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
static void MX_TIM1_Init(void);
static void MX_USART6_UART_Init(void);
/* USER CODE BEGIN PFP */
void usDelay(uint32_t time); // timer
void W5500_Select(); // Chip select
void W5500_Unselect(); // Chip unselect
void W5500_ReadBuff(uint8_t* buff, uint16_t len);
void W5500_WriteBuff(uint8_t* buff, uint16_t len);
void W5500_WriteByte(uint8_t byte);
void sendinfo ();
void sendinfo1 ();
/* USER CODE END PFP */

/* USER CODE BEGIN 0 */
uint8_t W5500_ReadByte(void)
{
uint8_t byte;
W5500_ReadBuff(&byte, sizeof(byte));
return byte;
}

wiz_NetInfo gWIZNETINFO = { .mac = {0x00, 0x08, 0xdc, 0x5f, 0x39, 0x4a},
.ip = {192, 168, 22, 3},
.sn = {255, 255, 255, 0},
.gw = {192, 168, 88, 1},
.dns = {0, 0, 0, 0},
.dhcp = NETINFO_STATIC };
/* USER CODE END 0 */

int main(void)
{
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SPI1_Init();
MX_TIM1_Init();
MX_USART6_UART_Init();
/* USER CODE BEGIN 2 */

HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_RESET); // Pin nRESET down
usDelay(501);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_SET); // Pin nRESET up
usDelay(1010);

uint8_t rx_buff_sizes[8] = {2, 2, 2, 2, 2, 2, 2, 2};
uint8_t tx_buff_sizes[8] = {2, 2, 2, 2, 2, 2, 2, 2};

wizchip_init(tx_buff_sizes, rx_buff_sizes);

reg_wizchip_cs_cbfunc(W5500_Select, W5500_Unselect);
reg_wizchip_spi_cbfunc(W5500_ReadByte, W5500_WriteByte);
reg_wizchip_spiburst_cbfunc(W5500_ReadBuff, W5500_WriteBuff);

wizchip_setnetinfo(&gWIZNETINFO);
sendinfo(); // send to PC by UART all gWIZNETINFO
wizchip_getnetinfo(&gWIZNETINFO);
usDelay(1000);
sendinfo();
}

void W5500_Select(void)
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);
}
void W5500_Unselect(void)
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
}
void W5500_ReadBuff(uint8_t* buff, uint16_t len)
{
HAL_SPI_Receive(&hspi1, buff, len, 0xFFFFFFFF);
}
void W5500_WriteBuff(uint8_t* buff, uint16_t len)
{
HAL_SPI_Transmit(&hspi1, buff, len, 0xFFFFFFFF);
}
void W5500_WriteByte(uint8_t byte)
{
W5500_WriteBuff(&byte, sizeof(byte));
}

I watched the signal using an oscilloscope and see how packets go via SPI to the module by the command win chip_set net info and the module responds by the command wizchip_getnetinfo. I made a sendinfo(); function that sends gWIZNETINFO over UART to COM port PC and I see this:
00 00 00 00 00 00 - mac
00 00 00 00 - ip
3F FF FF FC - mask
00 00 00 00 - gate
00 00 00 00 - dns
And these values may vary depending on the day of the week))) (I can’t understand the dependencies of changing this data).

**Please tell me, maybe I’m missing something?**

## Replies

### Reply 1 by praveen_k, 2021-11-15

> wiz_NetInfo gWIZNETINFO = { .mac = {0x00, 0x08, 0xdc, 0x5f, 0x39, 0x4a},
> .ip = {192, 168, 22, 3},
> .sn = {255, 255, 255, 0},
> .gw = {192, 168, 88, 1},
> .dns = {0, 0, 0, 0},
> .dhcp = NETINFO_STATIC };

Hello [@Orangeenush](https://maker.wiznet.io/u/orangeenush) !
I can see that your **ip** and **gw** network range are not matching…
Please set same network range in this file and also please have same network zone in your destination network settings.
Please visit [GitHub - wiznetindia/W5500-WebServer-with-STM32: Created Webserver example projects with W5500 ethernet shield and STM32 boards](https://github.com/wiznetindia/W5500-WebServer-with-STM32) for main.c source file reference…

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Source: https://maker.wiznet.io/forum/14392