ENC28J60-Mbed-EMAC-Driver

This driver is an adaptation of the existing ENC28J60 EMAC driver from Zoltan Hudak (see https://os.mbed.com/users/hudakz/code/ENC28J60-EMAC/) which is based on the original work from tobiasjaster (see https://github.com/tobiasjaster/ENC28J60-EMAC-Driver).

This driver is working on Mbed OS 6. RX filters have been removed to allow using this driver for non-endpoint nodes. This allows project such as Nanostack border router to work on microcontrollers that don't have an embedded Ethernet MAC peripheral with help of the external ENC28J60 Ethernet MAC.

Usage

Connect the MOSI, MISO, SCK and CS pins of the ENC28J60 to your board. By default, the driver polls periodically for new incoming packet. The INT pin can be used optionnaly to trigger reception instead of polling (see below) and RESET pin is never used.
Simply clone this repo into your Mbed OS project, or add it as a library (.lib file) using the standard method.

Configure the driver in mbed_app.json by override the following parameters with your own values:

"enc28j60-emac.sck": "ETH_SCLK",
"enc28j60-emac.cs": "ETH_CSn",
"enc28j60-emac.miso": "ETH_MISO",
"enc28j60-emac.mosi": "ETH_MOSI",
"enc28j60-emac.event-handling": "ENC28J60_EVENT_HANDLING_TIMER",

If you want the RX events to be catched using the interrupt pin instead of polling periodically for new packet, you have to configure the following parameters:
```
"enc28j60-emac.int": "ETH_INTn",
"enc28j60-emac.event-handling": "ENC28J60_EVENT_HANDLING_IRQ",
```
Optionally adjust the SPI frequency to your requirements using "enc28j60-emac.spi-freq": <custom_freq> in your mbed_app.json.

To set the MAC address define an array with the desired address bytes and call the set_hwaddr(mac) function before calling the network interface connect function (see following example).

const uint8_t       MAC[6] = { 0, 1, 2, 3, 4, 5 };
EthernetInterface   net;

int main()
{
    net.get_emac().set_hwaddr(MAC);             // set MAC address
    if (net.connect() != 0) {
        printf("Error: Unable to connect to the network.\n");
        return -1;
    }
...
}

If you want to use this driver with the Nanostack border router project, you have simply to set "app.backhaul-mac-src": "CONFIG" and override "app.backhaul-mac": "{ 0x1, 0x2, 0x3, 0x4, 0x5, 0x6 }" in the mbed_app.json. In this case, the following step must be ignored. Other existing networking projects might require different steps.

YannCharbon/ENC28J60-Mbed-EMAC-Driver

ENC28J60-Mbed-EMAC-Driver

Usage