Pico-10BASE-T-Library

Library which allows the Pi Pico to send UDP packets over 10BASE-T Ethernet
Based on Pico-10BASE-T by kingyoPiyo
Example code can be found here

What does it do?

This library allows the Raspbery Pi Pico (or any other RP2040-based board) to send UDP traffic over Ethernet with no extra hardware. This is acomplished by using the PIO blocks inside the RP2040. This library also makes use of the second core of the microcontroller, which handles the link pulse and data sending.

How to use it?

The hardware configuration used here is the same as in Pico-10BASE-T.

In order to use this library, you must add the Pico-10BASE-T-Library subdirectory to the CMakeLists.txt of your project and include 10baset in target_link_libraries. Then, just add the 10baset.h header into your code.

The dest_ip_t type is a structure which is used to specify the destination IP for the transmit functions. It contains the four bytes of the destination IP: ip1, ip2, ip3, ip4.

The library provides the following functions:
void eth_core_start() is used to initialize the Ethernet link on the second core and PIO.
void eth_set_ip(uint8_t ip1, uint8_t ip2, uint8_t ip3, uint8_t ip4) sets the IP address of the board.
void udp_printf(dest_ip_t ip, uint16_t port, const char *format, ...) sends a formatted string to the specified destination IP address on the specified port over UDP. It should be used just like a regular printf function, however be mindful of the UDP payload size limitation set in 10baset.h, which can be modified to suit your own application.
void udp_send_data(dest_ip_t ip, uint16_t port, uint8_t data[], uint16_t length) sends data to the specified IP, over the specified port. It works by packing the data into a payload structure.
void udp_send_payload(udp_payload *payload) transmits a pre-packaged payload.