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Backwards compatible eh1 SPI support #163

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Backwards compatible eh1 SPI support #163

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0d5cf38
Add eh1 impls for LPSPI
Florob Jun 8, 2024
ba79054
Implement eh02 spi::Transactional for LPSPI
Florob Jun 8, 2024
18ee597
Test continuous xfer-then-read behavior
mciantyre Jun 10, 2024
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16 changes: 16 additions & 0 deletions examples/rtic_spi_blocking.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,22 @@ mod app {

delay();
}

{
use eh1::spi::{
Operation::{Read, TransferInPlace},
SpiDevice,
};

let mut read = [0u8; 7];
let mut xfer = [0u8; 16];
for idx in 0..xfer.len() {
xfer[idx] = idx as u8;
}

spi.transaction(&mut [TransferInPlace(&mut xfer), Read(&mut read)])
.unwrap();
}
}
}
}
6 changes: 6 additions & 0 deletions src/chip/dma.rs
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Expand Up @@ -141,6 +141,12 @@ impl<P, const N: u8> lpuart::Lpuart<P, N> {
// LPSPI
use crate::lpspi;

impl<P, const N: u8> lpspi::Lpspi<P, N> {
pub(crate) fn wait_for_transmit_fifo_space(&self) -> Result<(), lpspi::LpspiError> {
crate::spin_on(self.spin_for_fifo_space())
}
}

unsafe impl<P, const N: u8> peripheral::Source<u32> for lpspi::Lpspi<P, N> {
fn source_signal(&self) -> u32 {
LPSPI_DMA_RX_MAPPING[N as usize - 1]
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