swaitsandClaude Opus 4.6
3102fc747a
Implement full SSD1306 OLED display support: - Splash screen on boot (1.5s) with project name, version, board - Dashboard showing radio state, config, counters, RSSI/SNR - RSSI history sparkline (64-sample ring buffer, 2px-wide bars) - DisplayOn/DisplayOff host commands routed via dedicated channel - Pure render functions against generic DrawTarget (no hardware coupling) - Display on/off control bypasses radio task entirely Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
43 lines
1.2 KiB
Rust
43 lines
1.2 KiB
Rust
use crate::io::AsyncRead;
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use futures_core::future::Future;
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use futures_core::ready;
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use futures_core::task::{Context, Poll};
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use std::io;
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use std::mem;
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use std::pin::Pin;
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/// Future for the [`read_exact`](super::AsyncReadExt::read_exact) method.
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#[derive(Debug)]
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#[must_use = "futures do nothing unless you `.await` or poll them"]
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pub struct ReadExact<'a, R: ?Sized> {
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reader: &'a mut R,
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buf: &'a mut [u8],
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}
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impl<R: ?Sized + Unpin> Unpin for ReadExact<'_, R> {}
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impl<'a, R: AsyncRead + ?Sized + Unpin> ReadExact<'a, R> {
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pub(super) fn new(reader: &'a mut R, buf: &'a mut [u8]) -> Self {
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Self { reader, buf }
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}
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}
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impl<R: AsyncRead + ?Sized + Unpin> Future for ReadExact<'_, R> {
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type Output = io::Result<()>;
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fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
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let this = &mut *self;
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while !this.buf.is_empty() {
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let n = ready!(Pin::new(&mut this.reader).poll_read(cx, this.buf))?;
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{
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let (_, rest) = mem::take(&mut this.buf).split_at_mut(n);
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this.buf = rest;
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}
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if n == 0 {
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return Poll::Ready(Err(io::ErrorKind::UnexpectedEof.into()));
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}
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}
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Poll::Ready(Ok(()))
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}
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}
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