Struct teensy4_bsp::usb::Writer

pub struct Writer(_);

This is supported on crate feature usb-logging only.

A type that can send data to a USB serial host

Use Writer::write to write byte buffers. Or, use the standard write!() macro to serialize data to the writer.

Implementations

impl Writer

pub fn write<B: AsRef<[u8]>>(&mut self, buffer: B) -> Result<usize, Error>

Writes raw bytes to the USB serial host

write may return a size smaller than buffer. This indicates that the driver could only write that many elements from the buffer. If it’s important that you write a complete message, you’ll need to retry the call with the rest of the data.

pub fn flush(&mut self) -> Result<(), Error>

Flush the written USB data

flush may schedule an additional USB transfer to write USB data. However, it will not make your USB data appear to the host faster. You should not call flush in a tight USB writing loop, since the driver will attempt to pack multiple writes into a single USB transfer.

Trait Implementations

impl Write for Writer

fn write_str(&mut self, string: &str) -> Result

Writes a string slice into this writer, returning whether the write succeeded.

fn write_char(&mut self, c: char) -> Result<(), Error>

Writes a char into this writer, returning whether the write succeeded.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Glue for usage of the write! macro with implementors of this trait.

impl Send for Writer