# ENC424J600 Driver

## Examples

### Endless Pinging - `tx_stm32f407`

This program demonstrates the Ethernet TX capability on an STM32F407 board connected to an ENC424J600 module via SPI. Once loaded and initialised, a specific ping packet is sent (broadcasted) every 100ms. Such a packet has the following properties:

* Destination MAC Address: ff-ff-ff-ff-ff-ff
* Source MAC Address: 08-60-6e-44-42-95
* Destination IP Address: 192.168.1.231
* Source IP Address: 192.168.1.100
* Frame Length in Bytes: 64

Note that this program uses ITM for logging output.

#### How-to

1.  Prepare the Rust and Cargo environment for building and running the program on STM32F4xx Cortex-M platforms.

2.  Install [`itm`](https://docs.rs/itm/) on Cargo:
    ```
    cargo install itm
    ```
    If necessary, add your installation location (`~/.cargo/bin` by default) to `$PATH`.

3.  Connect your STM32F407 device to the computer. Without changing any code, you may use an STLink V2 debugger. 

4.  Run OpenOCD with the appropriate configuration files (e.g. `interface/stlink-v2.cfg`, `target/stm32f4x.cfg`).

5.  With OpenOCD running, build and run this program:
    ```
    cargo run --release --example=tx_stm32f407 --features=stm32f407
    ```
    Use appropriate GDB commands such as `c` for continuing.

6.  On a separate console window, monitor and observe the ITM output, which is located at the same directory as you started OpenOCD:
    ```
    itmdump -f itm.log -F
    ```