Implement UART type erasure (#2381)

* Simplify test

* Remove unnecessary refs

* Improve readability

* Require Instance: PeripheralMarker

* Take &self

* Avoid unsafe code on non-s2

* SImplify drain_fifo

* Simplify read_bytes

* Avoid a register read on ESP32

* Deduplicate is_idle functions

* Add missing inlines

* Move code out of trait

* Erase UART instances

* Disable LTO

Author: bugadani

esp-hal/CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `AnySpi` and `AnySpiDmaChannel`. (#2334)
 - Added `AnyI2s` and `AnyI2sDmaChannel`. (#2367)
 - Added `AnyTwai`. (#2359)
+- Added `AnyUart`. (#2381)
 - `Pins::steal()` to unsafely obtain GPIO. (#2335)
 - `I2c::with_timeout` (#2361)
 - `Spi::half_duplex_read` and `Spi::half_duplex_write` (#2373)
@@ -28,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Peripheral type erasure for TWAI (#2359)
 - The SPI driver has been rewritten to allow using half-duplex and full-duplex functionality on the same bus. See the migration guide for details. (#2373)
 - Renamed `SpiDma` functions: `dma_transfer` to `transfer`, `dma_write` to `write`, `dma_read` to `read`. (#2373)
+- Peripheral type erasure for UART (#2381)
 
 ### Fixed
 

esp-hal/MIGRATING-0.21.md

@@ -32,6 +32,7 @@ peripherals:
 - I2S
 - I2C
 - TWAI
+- UART
 
 ```diff
 -Spi<'static, SPI2, FullDuplexMode>

esp-hal/src/soc/esp32/peripherals.rs

@@ -68,9 +68,9 @@ crate::peripherals! {
     TIMG1 <= TIMG1,
     TOUCH <= virtual,
     [Twai0] TWAI0 <= TWAI0,
-    UART0 <= UART0,
-    UART1 <= UART1,
-    UART2 <= UART2,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
+    [Uart2] UART2 <= UART2,
     UHCI0 <= UHCI0,
     UHCI1 <= UHCI1,
     WIFI <= virtual,

esp-hal/src/soc/esp32c2/peripherals.rs

@@ -45,8 +45,8 @@ crate::peripherals! {
     SYSTIMER <= SYSTIMER,
     SW_INTERRUPT <= virtual,
     TIMG0 <= TIMG0,
-    UART0 <= UART0,
-    UART1 <= UART1,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
     WIFI <= virtual,
     XTS_AES <= XTS_AES,
     MEM2MEM1 <= virtual,

esp-hal/src/soc/esp32c3/peripherals.rs

@@ -54,8 +54,8 @@ crate::peripherals! {
     TIMG0 <= TIMG0,
     TIMG1 <= TIMG1,
     [Twai0] TWAI0 <= TWAI0,
-    UART0 <= UART0,
-    UART1 <= UART1,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
     UHCI0 <= UHCI0,
     UHCI1 <= UHCI1,
     USB_DEVICE <= USB_DEVICE,

esp-hal/src/soc/esp32c6/peripherals.rs

@@ -83,8 +83,8 @@ crate::peripherals! {
     TRACE0 <= TRACE,
     [Twai0] TWAI0 <= TWAI0,
     [Twai1] TWAI1 <= TWAI1,
-    UART0 <= UART0,
-    UART1 <= UART1,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
     UHCI0 <= UHCI0,
     USB_DEVICE <= USB_DEVICE,
     WIFI <= virtual,

esp-hal/src/soc/esp32h2/peripherals.rs

@@ -74,8 +74,8 @@ crate::peripherals! {
     TIMG1 <= TIMG1,
     TRACE0 <= TRACE,
     [Twai0] TWAI0 <= TWAI0,
-    UART0 <= UART0,
-    UART1 <= UART1,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
     UHCI0 <= UHCI0,
     USB_DEVICE <= USB_DEVICE,
     MEM2MEM1 <= virtual,

esp-hal/src/soc/esp32s2/peripherals.rs

@@ -61,8 +61,8 @@ crate::peripherals! {
     TIMG0 <= TIMG0,
     TIMG1 <= TIMG1,
     [Twai0] TWAI0 <= TWAI0,
-    UART0 <= UART0,
-    UART1 <= UART1,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
     UHCI0 <= UHCI0,
     ULP_RISCV_CORE <= virtual,
     USB0 <= USB0,

esp-hal/src/soc/esp32s3/peripherals.rs

@@ -67,9 +67,9 @@ crate::peripherals! {
     TIMG0 <= TIMG0,
     TIMG1 <= TIMG1,
     [Twai0] TWAI0 <= TWAI0,
-    UART0 <= UART0,
-    UART1 <= UART1,
-    UART2 <= UART2,
+    [Uart0] UART0 <= UART0,
+    [Uart1] UART1 <= UART1,
+    [Uart2] UART2 <= UART2,
     UHCI0 <= UHCI0,
     UHCI1 <= UHCI1,
     ULP_RISCV_CORE <= virtual,