Fix linker script for nrf bootloader example

4 files changed, 24 insertions, 1 deletions

diff --git a/examples/boot/nrf/README.md b/examples/boot/nrf/README.md
index 453df7f31..1f25ffc05 100644
--- a/examples/boot/nrf/README.md
+++ b/examples/boot/nrf/README.md
@@ -16,6 +16,9 @@ application.
 
 
 ```
+# Use bare metal linker script
+cp memory-bl.x ../../../embassy-boot/nrf/memory.x
+
 # Flash bootloader
 cargo flash --manifest-path ../../../embassy-boot/nrf/Cargo.toml --features embassy-nrf/nrf52840 --release --chip nRF52840_xxAA
 # Build 'b'
diff --git a/examples/boot/nrf/memory-bl.x b/examples/boot/nrf/memory-bl.x
new file mode 100644
index 000000000..8a32b905f
--- /dev/null
+++ b/examples/boot/nrf/memory-bl.x
@@ -0,0 +1,18 @@
+MEMORY
+{
+  /* NOTE 1 K = 1 KiBi = 1024 bytes */
+  FLASH                             : ORIGIN = 0x00000000, LENGTH = 24K
+  BOOTLOADER_STATE                  : ORIGIN = 0x00006000, LENGTH = 4K
+  ACTIVE                            : ORIGIN = 0x00007000, LENGTH = 64K
+  DFU                               : ORIGIN = 0x00017000, LENGTH = 68K
+  RAM                         (rwx) : ORIGIN = 0x20000008, LENGTH = 32K
+}
+
+__bootloader_state_start = ORIGIN(BOOTLOADER_STATE);
+__bootloader_state_end = ORIGIN(BOOTLOADER_STATE) + LENGTH(BOOTLOADER_STATE);
+
+__bootloader_active_start = ORIGIN(ACTIVE);
+__bootloader_active_end = ORIGIN(ACTIVE) + LENGTH(ACTIVE);
+
+__bootloader_dfu_start = ORIGIN(DFU);
+__bootloader_dfu_end = ORIGIN(DFU) + LENGTH(DFU);
diff --git a/examples/boot/nrf/memory.x b/examples/boot/nrf/memory.x
index dfb72103f..3a54ca460 100644
--- a/examples/boot/nrf/memory.x
+++ b/examples/boot/nrf/memory.x
@@ -1,10 +1,11 @@
 MEMORY
 {
   /* NOTE 1 K = 1 KiBi = 1024 bytes */
+  BOOTLOADER                        : ORIGIN = 0x00000000, LENGTH = 24K
   BOOTLOADER_STATE                  : ORIGIN = 0x00006000, LENGTH = 4K
   FLASH                             : ORIGIN = 0x00007000, LENGTH = 64K
   DFU                               : ORIGIN = 0x00017000, LENGTH = 68K
-  RAM                         (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
+  RAM                         (rwx) : ORIGIN = 0x20000008, LENGTH = 32K
 }
 
 __bootloader_state_start = ORIGIN(BOOTLOADER_STATE);
diff --git a/examples/boot/nrf/src/bin/a.rs b/examples/boot/nrf/src/bin/a.rs
index 2f05c817b..7368e36ce 100644
--- a/examples/boot/nrf/src/bin/a.rs
+++ b/examples/boot/nrf/src/bin/a.rs
@@ -28,6 +28,7 @@ async fn main(_s: embassy::executor::Spawner, p: Peripherals) {
 
     let mut updater = FirmwareUpdater::default();
     loop {
+        led.set_low();
         button.wait_for_any_edge().await;
         if button.is_low() {
             let mut offset = 0;