Another thing I should mention is that if I just use uart_set_params, and not uart_set_baudrate, then it doesn't panic, but it starts at 115200 regardless of what I set the config to.

I am having trouble settings UART_NUM_1's baudrate to 5000000.
I am trying to set it with param_config and set_baudrate, but neither work. Calling uart_set_baudrate with 5000000 causes a panic.
Am I missing a step to the ritual?

const uart_config_t uart_config = {
.baud_rate = 5000000,
.data ...

I wanted to learn more about the esptool and the ROM bootloader, and I like Rust, so I decided to implement esptool.py in Rust.
I only have communications up and running, and read_mac implemented, so I have a long way to go, but I wanted to post this now in case anyone wanted to help/learn about ...

If I want to port the esptool.py to another language, is there a document somewhere specifying the protocol used to communicate with the ROM bootloader? Or do I have to infer it from the python source? I will do the latter if the former isn't available, but having documentation would speed up the ...