feat: add support for buffered write mode for rram

2 files changed, 59 insertions, 0 deletions

diff --git a/examples/nrf54l15/src/bin/nvmc.rs b/examples/nrf54l15/src/bin/rramc.rs
index f990604cd..f990604cd 100644
--- a/examples/nrf54l15/src/bin/nvmc.rs
+++ b/examples/nrf54l15/src/bin/rramc.rs
diff --git a/examples/nrf54l15/src/bin/rramc_buffered.rs b/examples/nrf54l15/src/bin/rramc_buffered.rs
new file mode 100644
index 000000000..06c9585ed
--- /dev/null
+++ b/examples/nrf54l15/src/bin/rramc_buffered.rs
@@ -0,0 +1,59 @@
+#![no_std]
+#![no_main]
+
+use defmt::{info, unwrap};
+use embassy_executor::Spawner;
+use embassy_nrf::rramc::{Buffered, PAGE_SIZE, Rramc};
+use embedded_storage::nor_flash::{NorFlash, ReadNorFlash};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("Hello RRAMC NVMC!");
+
+    // Buffer 8 word lines
+    let mut f: Rramc<'_, Buffered<128>> = Rramc::new_buffered(p.RRAMC);
+
+    const ADDR: u32 = 0x80000;
+    let mut buf = [0u8; 4];
+
+    info!("Reading...");
+    unwrap!(f.read(ADDR, &mut buf));
+    info!("Read: {=[u8]:x}", buf);
+
+    info!("Erasing...");
+    unwrap!(f.erase(ADDR, ADDR + PAGE_SIZE as u32));
+
+    info!("Reading...");
+    unwrap!(f.read(ADDR, &mut buf));
+    info!("Read: {=[u8]:x}", buf);
+
+    info!("Writing...");
+    // 16 B (128-bit) write minimum
+    let out: [u8; 256] = [
+        0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa,
+        0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa,
+        0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb,
+        0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb,
+        0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc,
+        0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc,
+        0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd,
+        0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd,
+        0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa,
+        0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa,
+        0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb,
+        0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb,
+        0xcc, 0xcc, 0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc,
+        0xcc, 0xcc, 0xdd, 0xdd, 0xdd, 0xdd, 0xaa, 0xaa, 0xaa, 0xaa, 0xbb, 0xbb, 0xbb, 0xbb, 0xcc, 0xcc, 0xcc, 0xcc,
+        0xdd, 0xdd, 0xdd, 0xdd,
+    ];
+    unwrap!(f.write(ADDR, &out));
+
+    info!("Reading...");
+    // Can read arbitrary sizes
+    for addr in (ADDR..ADDR + 256).step_by(4) {
+        unwrap!(f.read(addr, &mut buf));
+        info!("Read: {=[u8]:x}", buf);
+    }
+}