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jptrzy: > > type SimpleFile<'a> = &'a mut File<'a, SdCard<ExclusiveDevice<esp_hal::spi::master::Spi<'a, Blocking>, Output<'a>, Delay>, Delay>, SdMmcClock, 4, 4, 1>; > This looks very suspicious. `&'a mut File<'a, ...>` is not what you have at: jptrzy: > > SdCardReader::new(&mut my_file); > This is `&'short mut File<'long, ...>`. They are different lifetimes. You are literally creating the short borrow right there before passing it to the constructor. The longer borrow already exists from previous assignments. You might be able to get this to work if you provide more than one lifetime to rule them all. You will likely also have to specify the relationship between all of the lifetimes at some point. I should probably also point out that `&'a mut File<'a>` is Borrowing something forever - Learning Rust

In particular, `&'a mut Thing<'a>` is never what you want. Trying multiple lifetimes is one approach. Another would be to try owning the `File<'a, ...>` in `SdCardReader<'a>`.

For some reason, when I add `SdCardReader::new(&mut my_file);`, rust will start frowning errors about lifetime. I still can't wrap my head around lifetimes (or at least good enough to solve this issue myself), so here I'm asking for help ;D **main.rs** : use embedded_sdmmc::*; [...] type SimpleFile<'a> = &'a mut File<'a, SdCard<ExclusiveDevice<esp_hal::spi::master::Spi<'a, Blocking>, Output<'a>, Delay>, Delay>, SdMmcClock, 4, 4, 1>; struct SdCardReader<'a> { file: SimpleFile<'a>, buffer: [u8; 32], // Fixed-size buffer for stb_vorbis buffer_pos: usize, buffer_size: usize, eof: bool, } impl<'a> SdCardReader<'a> { fn new(file: SimpleFile<'a>) -> Self { Self { file: file, buffer: [0u8; 32], buffer_pos: 0, buffer_size: 0, eof: false, } } } [...] fn main() -> ! { [...] let mut volume_mgr = embedded_sdmmc::VolumeManager::new(sdcard, time_source); let mut volume0 = volume_mgr.open_volume(embedded_sdmmc::VolumeIdx(0)).unwrap(); let mut root_dir = volume0.open_root_dir().unwrap(); let mut my_file = root_dir.open_file_in_dir("1mb.mp3", embedded_sdmmc::Mode::ReadOnly).unwrap(); SdCardReader::new(&mut my_file); [...] } **Error Messages** : $ cargo run --release [...] error[E0597]: `volume0` does not live long enough --> src/main.rs:174:24 | 173 | let mut volume0 = volume_mgr.open_volume(embedded_sdmmc::VolumeIdx(0)).unwrap(); | ----------- binding `volume0` declared here 174 | let mut root_dir = volume0.open_root_dir().unwrap(); | ^^^^^^^ borrowed value does not live long enough ... 223 | } | - | | | `volume0` dropped here while still borrowed | borrow might be used here, when `volume0` is dropped and runs the `Drop` code for type `Volume` error[E0597]: `root_dir` does not live long enough --> src/main.rs:175:23 | 174 | let mut root_dir = volume0.open_root_dir().unwrap(); | ------------ binding `root_dir` declared here 175 | let mut my_file = root_dir.open_file_in_dir("1mb.mp3", embedded_sdmmc::Mode::ReadO... | ^^^^^^^^ borrowed value does not live long enough ... 223 | } | - | | | `root_dir` dropped here while still borrowed | borrow might be used here, when `root_dir` is dropped and runs the `Drop` code for type `Directory` error[E0597]: `my_file` does not live long enough --> src/main.rs:177:23 | 175 | let mut my_file = root_dir.open_file_in_dir("1mb.mp3", embedded_sdmmc::Mode::ReadO... | ----------- binding `my_file` declared here 176 | 177 | SdCardReader::new(&mut my_file); | ^^^^^^^^^^^^ borrowed value does not live long enough ... 223 | } | - | | | `my_file` dropped here while still borrowed | borrow might be used here, when `my_file` is dropped and runs the `Drop` code for type `File` [...] Mind that I can't use std, because I deploy this code on an ESP32.

Voor ik ga schrijven over de test die ik heb gedaan met de iMounts MacBook Air USB C Hub eerst even een paar dingen vooraf. Ik heb een MacBook Pro en geen MacBook Air Ik heb de iMounts MacBook Air USB...

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