small README update

Reviewed-on: #72

README.md

@@ -148,3 +148,13 @@ example.
 The Segger RTT viewer can be used to display log messages received from the target. The base
 address for the RTT block placement is 0x10000000. It is recommended to use a search range of
 0x1000 around that base address when using the RTT viewer.
+
+## Learning (Embedded) Rust
+
+If you are unfamiliar with Rust on Embedded Systems or Rust in general, the following resources
+are recommended:
+
+- [Rust Book](https://doc.rust-lang.org/book/)
+- [Embedded Rust Book](https://docs.rust-embedded.org/book/)
+- [Embedded Rust Discovery](https://docs.rust-embedded.org/discovery/microbit/)
+- [Awesome Embedded Rust](https://github.com/rust-embedded/awesome-embedded-rust)

board-tests/Cargo.toml

@@ -14,6 +14,6 @@ embedded-hal-nb = "1"
 embedded-io = "0.6"
 
 [dependencies.va108xx-hal]
-version = "0.10.0"
+version = "0.11"
 features = ["rt"]
 

bootloader/Cargo.toml

@@ -15,7 +15,7 @@ num_enum = { version = "0.7", default-features = false }
 static_assertions = "1"
 
 [dependencies.va108xx-hal]
-version = "0.10"
+version = "0.11"
 
 [dependencies.vorago-reb1]
 version = "0.8"

examples/embassy/Cargo.toml

@@ -27,8 +27,8 @@ embassy-executor = { version = "0.7", features = [
   "executor-interrupt"
 ]}
 
-va108xx-hal = { version = "0.11", path = "../../va108xx-hal" }
+va108xx-hal = { version = "0.11" }
-va108xx-embassy = { version = "0.2", path = "../../va108xx-embassy" }
+va108xx-embassy = { version = "0.2" }
 
 [features]
 default = ["ticks-hz-1_000", "va108xx-embassy/irq-oc30-oc31"]

examples/rtic/Cargo.toml

@@ -22,5 +22,5 @@ rtic-sync = { version = "1.3", features = ["defmt-03"] }
 once_cell = {version = "1", default-features = false, features = ["critical-section"]}
 ringbuf = { version = "0.4.7", default-features = false, features = ["portable-atomic"] }
 
-va108xx-hal = { version = "0.11", path = "../../va108xx-hal" }
+va108xx-hal = { version = "0.11" }
-vorago-reb1 = { version = "0.8", path = "../../vorago-reb1" }
+vorago-reb1 = { version = "0.8" }

examples/simple/Cargo.toml

@@ -17,9 +17,7 @@ cortex-m-semihosting = "0.5.0"
 
 [dependencies.va108xx-hal]
 version = "0.11"
-path = "../../va108xx-hal"
 features = ["rt", "defmt"]
 
 [dependencies.vorago-reb1]
 version = "0.8"
-path = "../../vorago-reb1"

flashloader/Cargo.toml

@@ -29,7 +29,7 @@ rtic-monotonics = { version = "2", features = ["cortex-m-systick"] }
 rtic-sync = {version = "1", features = ["defmt-03"]}
 
 [dependencies.va108xx-hal]
-version = "0.10"
+version = "0.11"
 
 [dependencies.vorago-reb1]
 version = "0.8"

va108xx-embassy/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "va108xx-embassy"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]
 description = "Embassy-rs support for the Vorago VA108xx family of microcontrollers"

va108xx-hal/CHANGELOG.md

@@ -8,6 +8,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [unreleased]
 
+## [v0.11.1] 2025-03-10
+
+## Fixed
+
+- Fix `embedded_io` UART implementation to implement the documented contract properly.
+  The implementation will now block until at least one byte is available or can be written, unless
+  the send or receive buffer is empty.
+
 ## [v0.11.0] 2025-03-07
 
 ## Changed
@@ -253,6 +261,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - README with basic instructions how to set up own binary crate
 
 [unreleased]: https://egit.irs.uni-stuttgart.de/rust/va108xx-rs/compare/va108xx-hal-v0.11.0...HEAD
+[v0.11.1]: https://egit.irs.uni-stuttgart.de/rust/va108xx-rs/compare/va108xx-hal-v0.11.0...va108xx-hal-v0.11.1
 [v0.11.0]: https://egit.irs.uni-stuttgart.de/rust/va108xx-rs/compare/va108xx-hal-v0.10.0...va108xx-hal-v0.11.0
 [v0.10.0]: https://egit.irs.uni-stuttgart.de/rust/va108xx-rs/compare/va108xx-hal-v0.9.0...va108xx-hal-v0.10.0
 [v0.9.0]: https://egit.irs.uni-stuttgart.de/rust/va108xx-rs/compare/va108xx-hal-v0.8.0...va108xx-hal-v0.9.0

va108xx-hal/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "va108xx-hal"
-version = "0.11.0"
+version = "0.11.1"
 authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]
 edition = "2021"
 description = "HAL for the Vorago VA108xx family of microcontrollers"

va108xx-hal/src/uart/mod.rs

@@ -892,7 +892,15 @@ impl<Uart: Instance> embedded_hal_nb::serial::Read<u8> for Rx<Uart> {
 
 impl<Uart: Instance> embedded_io::Read for Rx<Uart> {
     fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
+        if buf.is_empty() {
+            return Ok(0);
+        }
         let mut read = 0;
+        loop {
+            if self.0.rxstatus().read().rdavl().bit_is_set() {
+                break;
+            }
+        }
         for byte in buf.iter_mut() {
             match <Self as embedded_hal_nb::serial::Read<u8>>::read(self) {
                 Ok(w) => {
@@ -1058,6 +1066,14 @@ impl<Uart: Instance> embedded_hal_nb::serial::Write<u8> for Tx<Uart> {
 
 impl<Uart: Instance> embedded_io::Write for Tx<Uart> {
     fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
+        if buf.is_empty() {
+            return Ok(0);
+        }
+        loop {
+            if self.0.txstatus().read().wrrdy().bit_is_set() {
+                break;
+            }
+        }
         let mut written = 0;
         for byte in buf.iter() {
             match <Self as embedded_hal_nb::serial::Write<u8>>::write(self, *byte) {
@@ -1066,7 +1082,7 @@ impl<Uart: Instance> embedded_io::Write for Tx<Uart> {
             }
         }
 
-        Ok(buf.len())
+        Ok(written)
     }
 
     fn flush(&mut self) -> Result<(), Self::Error> {