HTTP and ENC28J60 Ethernet NIC / MAC Driver

mctrivia · 2009-01-30 05:56

I have downloaded the IRC client athttp://forums.parallax.com/showthread.php?p=716355 but am over my head. I have the SpinStudio Nic addapter which uses the ENC28J60 Ethernet NIC / MAC Driver but I am not sure how to get it to download from my server. I am trying to download a small page from a get address. It is my own server so I can set how big the page responses will be.

Can anyone help me?

Harrison. · 2009-01-30 07:18

Here's a quick snippet from one of my projects that performs HTTP GETs to a remote server:

PRI doStuff | ret

  repeat
    ret := \checkServices    ' it's important to 'catch' exceptions from the underlying tcp stack with a \
    ... delays and other code go here ...

PRI checkServices | ch
  sock.connect(constant((72 << 24) + (14 << 16) + (176 << 8) + 143), 80)
  sock.resetBuffers
  if sock.waitConnectTimeout(2000)
    ' connected
    sock.str(string("GET /sometestpage.php HTTP/1.0",13,10))
    sock.str(string("Host: propserve.fwdweb.com",13,10))
    sock.str(string("User-Agent: PropTCP",13,10))
    sock.str(string("Connection: close",13,10,13,10)) 
    
    repeat until sock.rx == "#"                  ' wait for start char
    
    ch := sock.rxtime(250)                       ' get response code
    
    if ch <> "0"
      ' some service failed
      sock.close
      return 1
    
    sock.close
    return 0
  else 
    sock.close
    return -1

The code simply connects to a webserver and requests a page. The page contains a pound sign (#) followed by a single digit to represent the state of the service it is checking. You should be able to easily expand this to do whatever you wish since the API is almost identical to FullDuplexSerial's API.

You'll also want to get the latest tcp/ip stack here: www.parallax.com/Portals/0/Downloads/docs/cusapps/PropellerContest08/PropIRC-Source.zip. I haven't gotten around to uploading the latest version which has various fixes yet. I hope to get around to it this weekend.

HTTP and ENC28J60 Ethernet NIC / MAC Driver

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