move embassy-net-w5500 to subdir.

embassy-net-w5500/src/spi.rs

@@ -0,0 +1,37 @@
+use crate::device::RegisterBlock;
+use embedded_hal_async::spi::{Operation, SpiDevice};
+
+#[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub struct SpiInterface<SPI>(pub SPI);
+
+impl<SPI: SpiDevice> SpiInterface<SPI> {
+    pub async fn read_frame(
+        &mut self,
+        block: RegisterBlock,
+        address: u16,
+        data: &mut [u8],
+    ) -> Result<(), SPI::Error> {
+        let address_phase = address.to_be_bytes();
+        let control_phase = [(block as u8) << 3];
+        let operations = &mut [
+            Operation::Write(&address_phase),
+            Operation::Write(&control_phase),
+            Operation::TransferInPlace(data),
+        ];
+        self.0.transaction(operations).await
+    }
+
+    pub async fn write_frame(
+        &mut self,
+        block: RegisterBlock,
+        address: u16,
+        data: &[u8],
+    ) -> Result<(), SPI::Error> {
+        let address_phase = address.to_be_bytes();
+        let control_phase = [(block as u8) << 3 | 0b0000_0100];
+        let data_phase = data;
+        let operations = &[&address_phase[..], &control_phase, &data_phase];
+        self.0.write_transaction(operations).await
+    }
+}