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>
74 lines
2.5 KiB
Rust
74 lines
2.5 KiB
Rust
// SPDX-License-Identifier: Apache-2.0 OR MIT
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use core::ffi::CStr;
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use super::{OpenMode, sys_flen, sys_open, sys_seek};
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pub(crate) use super::{sys_remove as unlink, sys_rename as rename};
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use crate::{
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fd::{BorrowedFd, OwnedFd},
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fs, io,
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};
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pub(crate) struct Metadata {
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size: u64,
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}
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impl Metadata {
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#[inline]
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pub(crate) fn size(&self) -> u64 {
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self.size
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}
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}
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pub(crate) fn metadata(fd: BorrowedFd<'_>) -> io::Result<Metadata> {
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Ok(Metadata { size: sys_flen(fd)? as u64 })
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}
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pub(crate) fn open(path: &CStr, options: &fs::OpenOptions) -> io::Result<OwnedFd> {
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match (options.write, options.append) {
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(true, false) => {}
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(false, false) => {
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if options.truncate || options.create {
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return Err(io::Error::EINVAL);
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}
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}
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(_, true) => {
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if options.truncate {
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return Err(io::Error::EINVAL);
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}
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}
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}
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// Refs: https://github.com/openocd-org/openocd/blob/HEAD/src/target/semihosting_common.c
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let mode = match (options.read, options.write, options.append, options.create, options.truncate)
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{
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(true, false, false, false, false) => OpenMode::RDONLY_BINARY,
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(true, true, false, false, false) => OpenMode::RDWR_BINARY,
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(false, true, false, true, true) => OpenMode::WRONLY_TRUNC_BINARY,
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(true, true, false, true, true) => OpenMode::RDWR_TRUNC_BINARY,
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(false, true, true, true, false) => OpenMode::WRONLY_APPEND_BINARY,
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(true, true, true, true, false) => OpenMode::RDWR_APPEND_BINARY,
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_ => return Err(io::Error::UNSUPPORTED_PLATFORM),
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};
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sys_open(path, mode)
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}
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// TODO(arm_compat): Arm semihosting doesn't provide Large-file support (LFS).
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#[allow(clippy::cast_possible_wrap, clippy::cast_sign_loss)]
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pub(crate) fn seek(fd: BorrowedFd<'_>, pos: io::SeekFrom) -> io::Result<u64> {
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let abs_pos = match pos {
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io::SeekFrom::Start(pos) => pos,
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io::SeekFrom::End(offset) => {
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let len = sys_flen(fd)? as u64;
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let pos = (len as i64).saturating_add(offset);
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if pos.is_negative() {
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return Err(io::Error::EINVAL);
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}
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pos as u64
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} // io::SeekFrom::Current(_offset) => todo!(),
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};
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// sys_seek may succeed without this guard, but make the behavior consistent with other platforms.
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let abs_pos = isize::try_from(abs_pos).map_err(|_| io::Error::EINVAL)?;
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unsafe { sys_seek(fd, abs_pos as usize)? }
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Ok(abs_pos as u64)
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}
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