Component: TCP/IP (ENC28J60) (Comms: Networking)

Author	Matrix TSL
Version	2.2
Category	Comms: Networking

TCP/IP component

A set of routines used to control a ENC28J60 TCP/IP Module. Required connections VCC, Reset, GND, SCK, MISO, MOSI, CS. Leave these pins disconnected CLKOUT, ENC_WOL, ENC_INT

Component Pack

COMMSA

Detailed description

No detailed description exists yet for this component

Examples

Here is a simple example to help get started with the ENC28J60 module.

The example program creates a web page server on the network and will also respond to ping requests.

The HTML to drive the web pages is included in the flowchart near the bottom of the main program loop. ENC28J60 Example

Downloadable macro reference

	SetMyIPAddress
Allows the IP Address specified in the component properties to be overridden. The IP Address will revert back to the IP specified in the component properties as part of the initialise macro.
- BYTE	IP0
IP Address Parameter - e.g. 192
- BYTE	IP1
IP Address Parameter - e.g. 168
- BYTE	IP2
IP Address Parameter - e.g. 1
- BYTE	IP3
IP Address Parameter - e.g. 250
- VOID	Return

	PacketSend
Attempts to transmit a data packet to the ENC28J60 module.
- UINT	Length
- VOID	Return

	MakeTcpSynackFromSyn
- UINT	Port
- VOID	Return

	MakeArpRequest
[[File:]] -	ServerIP
- VOID	Return

	InitialiseDataLengthInfo
Initialises the data pointers to allow us to craft a response containing data
- VOID	Return

	MakeTcpAckFromAny
- UINT	Port
- VOID	Return

	PacketReceive
Attempts to receive a data packet from the ENC28J60 module. Returns the number of bytes received.
- UINT	Return

	CheckForTCPType
Checks to what kind of TCP type the received data is requesting. Returns a bit field specifying the type of request. 0x01 = Ack Requires, 0x02 = Synchronise 0x10 = Ack
- BYTE	Return

	CheckArpPacketIsMyreplyArp
- BYTE	Return

	CheckForIp
Checks to see if the received data is an IP request with my IP address.
- UINT	Length
- BYTE	Return

	CheckForTCPPort
Checks to see if the received data is requesting the server port
- UINT	Port
- BYTE	Return

	CheckForPing
Checks to see if the received data is a Ping request
- BYTE	Return

	GetModuleRevision
Requets the module revision number and returns the value supplied by the module's firmware.
- BYTE	Return

	MakeTcpAckWithData
- UINT	DataLength
- VOID	Return

	SetMyMACAddress
Allows the MAC Address specified in the component properties to be overridden. The MAC Address will revert back to the MAC specified in the component properties as part of the initialise macro.
- BYTE	MAC0
MAC Address Parameter
- BYTE	MAC1
MAC Address Parameter
- BYTE	MAC2
MAC Address Parameter
- BYTE	MAC3
MAC Address Parameter
- BYTE	MAC4
MAC Address Parameter
- BYTE	MAC5
MAC Address Parameter
- VOID	Return

	MakeArpAnswerFromRequest
- VOID	Return

	ReadArrayFromBuffer
Reads an array of bytes from the buffer at location specified for the number of bytes specified. If a space character is encountered then the macro will return straight away without the space character in the string.
- UINT	BufferLocation
- BYTE	NumberOfBytes
Number of bytes to read from the buffer and store into string
- BYTE	Data
- VOID	Return

	ReadRegister
Reads the value from a single register onboard the ENC28J60 module.
- BYTE	Address
- BYTE	Return

	CheckForARP
Checks to see if the received data is an ARP request with my IP address.
- UINT	Length
- BYTE	Return

	ClientSendPacket
- UINT	DestPort
- UINT	SourcePort
- BYTE	Flags
- BYTE	MaxSegmentSize
- BYTE	ClearSeqAck
- UINT	NextAckNum
- UINT	DataLength
- BYTE	DestMac
- BYTE	DestIp
- VOID	Return

	MakeEchoReplyFromRequest
- UINT	Length
- VOID	Return

	ControlLEDs
Allows both the LEDs on the Ethernet socket to be controlled. Useful for checking if the SPI communications are functioning correctly.
- BYTE	Mode
0=Off, 1=On, 2=Auto
- VOID	Return

	GetDataLength
Returns the number of received data bytes after the headers
- UINT	Return

	GetTcpDataPointer
- UINT	Return

	WriteRegister
Writes a value to a single register onboard the ENC28J60 module.
- BYTE	Address
- BYTE	Data
- VOID	Return

	FillTcpData
- UINT	Position
- STRING	Data
- UINT	Return

	ReadStringFromBuffer
Reads a string from the buffer at location specified for the number of bytes specified. If a space character is encountered then the macro will return straight away without the space character in the string.
- UINT	BufferLocation
- BYTE	NumberOfBytes
Number of bytes to read from the buffer and store into string
- STRING	Return

	GetSendersMAC
Gets the MAC address from locations 6-11 of the IP Header
- BYTE	MAC
6-byte Array to store the MAC address
- VOID	Return

	FillTcpArray
- UINT	Position
- UINT	Count
- BYTE	Data
- VOID	Return

	Initialise
Initialises the SPI connection to the TCPIP module and sets up some initial values. Flashes the LEDs on and off twice to confirm SPI comms are active. LEDs are then configured to auto functionality.
- VOID	Return

Property reference

	Properties
	Server Port
Sets the server's TCP/IP port address which is used to filter incoming TCP packets.
	Buffer Size
Number of bytes to use for the transmit and receive buffer, we actually use this +1 to allow for a null termination. 8-bit PICs should set this to 255 to allow compilation to succeed. Other devices can have larger buffers. Default = 500
	Channel
SPI Channel selector
	Prescale
Prescale option selector
	MOSI
SPI Data Out Pin SDO - Also Known as Master Out Slave In (MOSI) when used in Master mode.
	MISO
SPI Data In Pin SDI - Also Known as Master In Slave Out (MISO) when used in Master mode.
	CLK
SPI Clock Pin CLK - The Clock signal is driven by the SPI master.
	CS / SS
Chip Select / Slave Select Pin Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device.
	Reset Pin
	MAC0
	MAC1
	MAC2
	MAC3
	MAC4
	MAC5
	IP0
	IP1
	IP2
	IP3
	Scope Traces
Selects if the scope traces are automatically generated or not
	Console Data
Selects if the console data is automatically generated or not
	API
	Network Interface
List of network interfaces connected to the PC. Sets which interface we are communicating via.
	Connections
	Simulations
	Label
	Sim Type
Decides how to perform the simulation of the component. TCP IP - Communicates using the Windows TCP IP communications DLL SPI / API - Communicates using the CAL SPI to allow the communications to be analysed and debugged.