That library has been ported from the WIZnet WIZ_Ethernet_Library, to STM32F103 microcontrollers. The library supports W5100 and W5500 Ethernet controllers. The source code has been modified to support the W5200 too, but has not been tested (yet) on a real W5200 controller.
Ported to STM32F103 on 23 Aug 2015 by Vassilis Serasidis
- Unzip the file Ethernet_STM-master.zip into your Arduino IDE directory
arduino\libraries
and rename the folder Ethernet_STM-master to Ethernet_STM
In this case the library can be used from the 8-bit and 32-bit Arduino boards (UNO, Nano, DUE etc) and from STM32F1 microcontroller series (for example STM32F103).
- Unzip the file Ethernet_STM-master.zip into your Arduino IDE directory
...arduino\hardware\Arduino_STM32\STM32F1\libraries
and rename the folder Ethernet_STM-master to Ethernet_STM
For selecting among those tree chips edit the file:
Ethernet_STM\src\utility\w5100.h
and comment-out only the line with the chip you want to use.
By default the W5500 ethernet controller is selected.
//#define W5100_ETHERNET_SHIELD // Arduino Ethenret Shield and Compatibles ...
//#define W5200_ETHERNET_SHIELD // WIZ820io, W5200 Ethernet Shield
#define W5500_ETHERNET_SHIELD // WIZ550io, ioShield series of WIZnet
If you edit the w5100.h file, save it and re-compile your sketch.
For selecting the Sockets number (1-8) and the RAM buffer amount (1-16 kBytes) for each Socket, edit the file:
Ethernet_STM\src\utility\w5500.h
and change the values you want.
Total RAM buffer is 16 kBytes for Transmitter and 16 kBytes for receiver for 1 Socket.
The Total W5500 RAM buffer is 32 kBytes (16 + 16).
If you use more Sockets then the RAM buffer must be split.
For example: if you use 2 Sockets then all socket must use upto 16 kBytes in total RAM.
So, we have:
#define MAX_SOCK_NUM 2 // Select two Sockets.
#define RXBUF_SIZE 8 // The Receiver buffer size will be 8 kBytes
#define TXBUF_SIZE 8 // The Transmitter buffer size will be 8 kBytes
In total we use (2 Sockets)*(8 kBytes) for transmitter + (2 Sockets)*(8 kBytes) for receiver = 32 kBytes.
I would prefer to use only 1 Socket with 16 kBytes RAM buffer for transmitter and 16 kByte for receiver buffer.
#define MAX_SOCK_NUM 1 // Select only one Socket
#define RXBUF_SIZE 16 // Select 16 kBytes Receiver RAM buffer
#define TXBUF_SIZE 16 // Select 16 kBytes Transmitter RAM buffer
Default settings:
#define MAX_SOCK_NUM 8 // Select the number of Sockets (1-8)
#define RXBUF_SIZE 2 // Select the Receiver buffer size (1 - 16 kBytes)
#define TXBUF_SIZE 2 // Select the Transmitter buffer size (1 - 16 kBytes)
If you edit the w5500.h file, save it and re-compile your sketch.
- Choose the desired ethernet chip you want to use (W5100, W5200 or W5500) from the w5100.h file
- include this library in your sketch
#include <Ethernet_STM.h>
All functions / commands have the same syntax with the stock Arduino Ethernet library.
| W5x00 | STM32F103 |
|---|---|
| SS | PA4 |
| SCK | PA5 |
| MISO | PA6 |
| MOSI | PA7 |
DO NOT FORGET TO ADD A RESISTOR 4k7 BETWEEN RESET AND 3.3V (OR RESET AND 5V) PINS ON ETHERNET SHIELD
