Crate orouter_serial
source ·Expand description
This crate provides typed messages used for serial communication between host and oRouter. It also contains codecs for different serial HW used in oRouter.
As a wire codec oRouter uses COBS encoding, specifically cobs rust crate but this is completely abstracted from user of this library.
For reading of messages one can use instance of crate::host::MessageReader
-
after it’s created it can be fed incoming slices of bytes (u8
s) and messages are returned
in a crate::heapless::Vec
when successfully decoded.
Example:
use orouter_serial::host::{
calculate_cobs_overhead,
codec::{UsbCodec, MAX_USB_FRAME_LENGTH},
Message, MessageReader, StatusCode, RAWIQ_DATA_LENGTH,
};
const TEST_DATA: [u8; 4] = [0x03, 0xc5, 0x02, 0x00];
fn main() {
let mut message_reader =
MessageReader::<{ calculate_cobs_overhead(RAWIQ_DATA_LENGTH) }, 17>::default();
// feed the message_reader with test data representing a Status message
let messages = message_reader.process_bytes::<UsbCodec>(&TEST_DATA[..]).unwrap();
println!("received messages = {:?}", messages);
assert_eq!(
messages.get(0),
Some(Message::Status { code: StatusCode::FrameReceived}).as_ref()
);
}
for more complete read example refer to examples/read.rs
For encoding a message for being send over the serial line a method
crate::host::Message::encode
is used. However, if you know a type of serial line you will
be using to send a message (USB or BLE) you can use crate::host::Message::as_frames
method
with a specific codec from crate::host::codec
module to get message bytes framed in a way
needed by the particular serial line type.
Example:
use std::str::FromStr;
use orouter_serial::host::{codec::UsbCodec, Message};
fn main() {
// let's create a configuration message to set oRouter to EU region with spreading factor 7
let message = Message::from_str("config@1|7").unwrap();
// for simplicity just output the bytes
println!("bytes = {:02x?}", message.encode().unwrap().as_slice());
// now let's get frames for sending over USB
let _frames = message.as_frames::<UsbCodec>().unwrap();
}
for more complete write example refer to examples/write.rs
Cargo features
std
- on by default, exposes things which need standard library (e.g.Debug
derives)defmt-impl
- add [defmt::Format
] derive implementations
Re-exports
pub use heapless;
Modules
- Wrap messages