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esp-hosted: smaller delay after transfer, makes slightly better perf.

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This commit is contained in:
Dario Nieuwenhuis 2023-06-22 21:10:58 +02:00
parent 0d02298ea6
commit 6e65282f18
1 changed files with 6 additions and 1 deletions
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7
embassy-net-esp-hosted/src/lib.rs
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@ -227,7 +227,12 @@ where
} }
self.spi.transfer(&mut rx_buf, &tx_buf).await.unwrap(); self.spi.transfer(&mut rx_buf, &tx_buf).await.unwrap();
let delay_until = Instant::now() + Duration::from_millis(1);
// The esp-hosted firmware deasserts the HANSHAKE pin a few us AFTER ending the SPI transfer
// If we check it again too fast, we'll see it's high from the previous transfer, and if we send it
// data it will get lost.
// Make sure we check it after 100us at minimum.
let delay_until = Instant::now() + Duration::from_micros(100);
self.handle_rx(&mut rx_buf); self.handle_rx(&mut rx_buf);
Timer::at(delay_until).await; Timer::at(delay_until).await;
} }