Mikroelektronika MIKROE-724 データシート
500
mikoBasic PRO for dsPIC30/33 and PIC24
MikroElektronika
SPI Ethernet ENC24J600 Library
The
ENC24J600
is a stand-alone Ethernet controller with an industry standard Serial Peripheral Interface (SPI). It is
designed to serve as an Ethernet network interface for any controller equipped with SPI.
The
ENC24J600
meets all of the IEEE 802.3 specifications applicable to 10Base-T and 100Base-TX Ethernet. It
incorporates a number of packet filtering schemes to limit incoming packets. It also provides an internal, 16-bit wide
DMA module for fast data throughput and hardware assisted IP checksum calculations. Communication with the host
controller is implemented via two interrupt pins and the SPI, with data rates of 10/100 Mb/s. Two dedicated pins are
used for LED link and network activity indication.
This library is designed to simplify handling of the underlying hardware (
ENC24J600
). It works with any dsPIC30/33
and PIC24 with integrated SPI and more than 4 Kb ROM memory. 38 to 40 MHz clock is recommended to get from 8
to 10 Mhz SPI clock, otherwise dsPIC30/33 and PIC24 should be clocked by
ENC24J600
clock output due to its silicon
bug in SPI hardware. If you try lower dsPIC30/33 and PIC24 clock speed, there might be board hang or miss some
requests.
SPI Ethernet ENC24J600 library supports:
- IPv4 protocol.
- ARP requests.
- ICMP echo requests.
- UDP requests.
- TCP requests (no stack, no packet reconstruction).
- ARP client with cache.
- DNS client.
- UDP client.
- DHCP client.
- packet fragmentation is
NOT supported.
Important:
- Global library variable
SPI_Ethernet_24j600_userTimerSec
is used to keep track of time for all client
implementations (ARP, DNS, UDP and DHCP). It is user responsibility to increment this variable each second in it’s
code if any of the clients is used.
- For advanced users there is
__EthEnc24j600Private.mbas
unit in Uses folder of the compiler with description
of all routines and global variables, relevant to the user, implemented in the SPI Ethernet ENC24J600 Library.
- The appropriate hardware SPI module must be initialized before using any of the SPI Ethernet ENC24J600 library
routines. Refer to SPI Library.
- For MCUs with multiple SPI modules it is possible to initialize them and then switch by using the
SPI_Set_
Active()
routine.
Library Dependency Tree