---
title: "Programming WIZ550web"
url: "https://maker.wiznet.io/forum/10866"
markdown_url: "https://maker.wiznet.io/forum/10866/md"
type: "Forum topic"
category: "General"
author: "radiofm"
created: "2015-02-24T16:07:32+09:00"
last_activity: "2017-05-04T08:34:55+09:00"
language: "en"
views: 794
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Programming WIZ550web

## Question

Asked by radiofm on 2015-02-24 in General.

Hello
i try to flash new fw to WEB550web:

following this:
[wizwiki.net/wiki/doku.php?id=pro … b_download](http://wizwiki.net/wiki/doku.php?id=products:wiz550web:wiz550web_download)

First i program:
WIZ550web_Boot.bin

When i connect to terminal after this i see output message after board reset:
“Medium Density Flash memory”

next i program with file WIZ550web_App.bin

after this nothng - nothing at terminal output.
I am missing something ?

Ofcourse i us 0x8000000 at bootloader and 0x8006000 when i WIZ550web_App.bin

It is my first try with WIZnet chips and ARM after switching from PIC ![:wink:](https://emoji.discourse-cdn.com/twitter/wink.png?v=12)

// edit
when i burn with .hex file it working but only when i connect ethernet cable. - without not - it’s ok ?

Best Regards
Robert

## Replies

### Reply 1 by irina, 2015-02-25

Hi, Robert.
It seems normal operations.

The WIZ550web Init code checked PHY link (LAN cable connection) and If no PHY link, doesn’t work.
You can find related code in W5500_Init() function. (You can modify)

```
  /* PHY link status check */
  do {
    if(ctlwizchip(CW_GET_PHYLINK, (void*)&tmp) == -1) {
    	;
    	//myprintf("Unknown PHY Link status.\r\n");
    	//return 0;
    }
  } while (tmp == PHY_LINK_OFF);
```

Regards,
Eric.

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Source: https://maker.wiznet.io/forum/10866