Can someone point me to the Teensy 4.1 Ethernet driver?

[madmyers]

I'm looking into running Ethernet directly but I cannot find the right interfaces.

I've looked at FNET. I've looked at NativeEthernet. But I don't see anything like a Linux net_device.

I did find

fnet_return_t  fnet_eth_phy_write(fnet_netif_desc_t netif_desc, fnet_uint32_t reg_addr, fnet_uint16_t reg_data);

in FNET but never found an implementation.

Thanks

 

[PaulStoffregen]

Shawn's QNEthernet library is probably the best today. Here's a direct link to the driver code:

QNEthernet/src/drivers/driver_teensy41.c at master · ssilverman/QNEthernet

An lwIP-based Ethernet library for Teensy 4.1 and possibly some other platforms - ssilverman/QNEthernet

github.com

This example I wrote when developing the Teensy 4.1 hardware (which is based on earlier experiments with Teensy 3.6) is the simplest, but it only does minimal ARP and ICMP ping to test the hardware can send and receive packets:

teensy41_ethernet/teensy41_ethernet.ino at master · PaulStoffregen/teensy41_ethernet

Contribute to PaulStoffregen/teensy41_ethernet development by creating an account on GitHub.

github.com

 

[shawn]

See this thread where I post how to use the QNEthernet library to do raw frame processing without an IP stack:

https://forum.pjrc.com/index.php?threads/thoughts-about-extremely-low-overhead-and-low-bitrate-communications-on-teensy-4-1.75719/post-349254

 

[shawn]

You could also use the EthernetFrame interface if you just want to work with raw frames. No need to dive into the driver code for this.