fix(example): fix linker script for nrf52840

Signed-off-by: Haobo Gu <[email protected]>

boards/nrf52840/.cargo/config.toml

@@ -4,8 +4,8 @@
 
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
 # Have to use simmsb's elf2uf2 fork to flash https://github.com/simmsb/elf2uf2-rs 
-runner = "elf2uf2-rs -d"
-# runner = "probe-rs run --chip nRF52840_xxAA"
+# runner = "elf2uf2-rs -d"
+runner = "probe-rs run --chip nRF52840_xxAA"
 
 rustflags = [
   # Previously, the linker arguments --nmagic and -Tlink.x were set here.
@@ -35,4 +35,4 @@ target = "thumbv7em-none-eabi"       # Cortex-M4 and Cortex-M7 (no FPU)
 # target = "thumbv8m.main-none-eabihf" # Cortex-M33 (with FPU)
 
 [env]
-DEFMT_LOG = "error"
+DEFMT_LOG = "trace"

boards/nrf52840/memory.x

@@ -1,11 +1,11 @@
 MEMORY
 {
   /* NOTE 1 K = 1 KiBi = 1024 bytes */
-  /* FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
-  RAM : ORIGIN = 0x20000000, LENGTH = 256K */
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM : ORIGIN = 0x20000000, LENGTH = 256K
 
   /* These values correspond to the NRF52840 with Softdevices S140 7.3.0 */
-     FLASH : ORIGIN = 0x00027000, LENGTH = 868K
-     RAM : ORIGIN = 0x20020000, LENGTH = 128K
+     /* FLASH : ORIGIN = 0x00027000, LENGTH = 868K
+     RAM : ORIGIN = 0x20020000, LENGTH = 128K */
 
 }

boards/nrf52840/src/main.rs

@@ -33,9 +33,6 @@ const EEPROM_SIZE: usize = 128;
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    // if cfg!(debug_assertions) {
-    //     rtt_logger::init(log::LevelFilter::Info);
-    // }
     info!("RMK start!");
     // Initialize peripherals
     let p = embassy_nrf::init(Default::default());