sawyer/picocalc-os-rs
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sawyer bristol
2025-07-29 13:21:06 -06:00
parent 7ed35fb771
commit 2bddec08e6
1 changed files with 14 additions and 12 deletions
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26
src/scsi/mod.rs
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@@ -10,6 +10,8 @@ use scsi_types::*;
use crate::storage::SdCard;
const BULK_ENDPOINT_PACKET_SIZE: usize = 64;
pub struct MassStorageClass<'d, D: Driver<'d>> {
sdcard: SdCard,
bulk_out: D::EndpointOut,
@@ -23,8 +25,8 @@ impl<'d, D: Driver<'d>> MassStorageClass<'d, D> {
let mut interface = function.interface();
let mut alt = interface.alt_setting(0x08, SUBCLASS_SCSI, 0x50, None);
let bulk_out = alt.endpoint_bulk_out(64);
let bulk_in = alt.endpoint_bulk_in(64);
let bulk_out = alt.endpoint_bulk_out(BULK_ENDPOINT_PACKET_SIZE as u16);
let bulk_in = alt.endpoint_bulk_in(BULK_ENDPOINT_PACKET_SIZE as u16);
Self {
bulk_out,
@@ -53,7 +55,7 @@ impl<'d, D: Driver<'d>> MassStorageClass<'d, D> {
}
async fn handle_command(&mut self, cbw: &[u8]) -> Result<(), ()> {
let mut response: Vec<u8, 64> = Vec::new();
let mut response: Vec<u8, BULK_ENDPOINT_PACKET_SIZE> = Vec::new();
let mut block = [Block::new(); 1];
match parse_cb(cbw) {
@@ -211,22 +213,22 @@ impl<'d, D: Driver<'d>> MassStorageClass<'d, D> {
ScsiCommand::Read { lba, len } => {
for i in 0..len {
let block_idx = BlockIdx(lba as u32 + i as u32);
defmt::info!("Reading LBA {} (block idx: {:?})", lba, block_idx);
self.sdcard.read_blocks(&mut block, block_idx);
self.bulk_in
.write(&block[0].contents)
.await
.map_err(|_| ())?;
for chunk in block[0].contents.chunks(BULK_ENDPOINT_PACKET_SIZE.into()) {
self.bulk_in.write(chunk).await.map_err(|_| ())?;
}
}
Ok(())
}
ScsiCommand::Write { lba, len } => {
for i in 0..len {
let block_idx = BlockIdx(lba as u32 + i as u32);
self.bulk_out
.read(&mut block[0].contents)
.await
.map_err(|_| ())?;
for chunk in block[0]
.contents
.chunks_mut(BULK_ENDPOINT_PACKET_SIZE.into())
{
slf.bulk_out.read(chunk).await.map_err(|_| ())?;
}
self.sdcard.write_blocks(&mut block, block_idx);
}
Ok(())