Use brtt instead of rtt

Cargo.toml

@@ -8,7 +8,7 @@ version = "0.1.0"
 [dependencies]
 cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
 defmt = "0.3"
-defmt-rtt = "0.4"
+defmt-brtt = "0.1"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
 # TODO select the correct rtic backend
 rtic = { version = "2.0.0-alpha.1", features = [ "correct-rtic-backend" ] }

README.md

@@ -169,10 +169,10 @@ $ echo $?
 0
 ```
 
-If you're running out of memory (`flip-link` bails with an overflow error), you can decrease the size of the device memory buffer by setting the `DEFMT_RTT_BUFFER_SIZE` environment variable. The default value is 1024 bytes, and powers of two should be used for optimal performance:
+If you're running out of memory (`flip-link` bails with an overflow error), you can decrease the size of the device memory buffer by setting the `DEFMT_BRTT_BUFFER_SIZE` environment variable. The default value is 1024 bytes, and powers of two should be used for optimal performance:
 
 ``` console
-$ DEFMT_RTT_BUFFER_SIZE=64 cargo rb hello
+$ DEFMT_BRTT_BUFFER_SIZE=64 cargo rb hello
 ```
 
 #### (10. Set `rust-analyzer.linkedProjects`)

src/lib.rs

@@ -1,7 +1,7 @@
 #![no_main]
 #![no_std]
 
-use defmt_rtt as _; // global logger
+use defmt_brtt as _; // global logger
 
 // TODO adjust HAL import
 // use some_hal as _; // memory layout