Add MSRV checks to the CI workflow and bump MSRV

.github/workflows/ci.yml

@@ -50,3 +50,46 @@ jobs:
         with:
           command: run
           args: --manifest-path=xtask/Cargo.toml -- ${{ matrix.chip }}
+
+  msrv-riscv:
+    name: Check MSRV for RISC-V
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        chip: [esp32c2, esp32c3]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          target: riscv32imc-unknown-none-elf
+          toolchain: "1.60.0"
+          default: true
+          components: rust-src
+      - uses: Swatinem/rust-cache@v1
+      - uses: actions-rs/cargo@v1
+        with:
+          command: run
+          args: --manifest-path=xtask/Cargo.toml -- --generate-only ${{ matrix.chip }}
+      - run: |
+          cd ${{ matrix.chip }} && cargo +1.60.0 check
+
+  msrv-xtensa:
+    name: Check MSRV for Xtensa
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        chip: [esp32, esp32s2, esp32s3, esp8266]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: esp-rs/xtensa-toolchain@v1.2
+        with:
+          default: true
+          ldproxy: false
+          buildtargets: ${{ matrix.chip }}
+          version: "1.60.0"
+      - uses: Swatinem/rust-cache@v1
+      - uses: actions-rs/cargo@v1
+        with:
+          command: run
+          args: --manifest-path=xtask/Cargo.toml -- ${{ matrix.chip }}

README.md

@@ -8,12 +8,26 @@ Peripheral Access Crates for Espressif SoCs and modules. For information on how
 
 If you discover any errors in an SVD file, please report the issue(s) upstream in the [espressif/svd] repository.
 
-Please note that in order to build the PACs for Xtensa devices (**ESP32**, **ESP32-S2**, **ESP32-S3**, **ESP8266**) you will need to first install the [Rust compiler fork] with Xtensa support. The minimum supported Rust version (MSRV) for these devices is `1.58.0`.
+Please note that in order to build the PACs for Xtensa devices (**ESP32**, **ESP32-S2**, **ESP32-S3**, **ESP8266**) you will need to first install the [Rust compiler fork] with Xtensa support.
 
 [svd2rust documentation]: https://docs.rs/svd2rust/latest/svd2rust/
 [espressif/svd]: https://github.com/espressif/svd/
 [rust compiler fork]: https://github.com/esp-rs/rust-build/
 
+## MSRV
+
+The **M**inimum **S**upported **R**ust **V**ersions are:
+
+- `1.60.0` for RISC-V devices (**ESP32-C2**, **ESP32-C3**)
+- `1.60.0` for Xtensa devices (**ESP32**, **ESP32-S2**, **ESP32-S3**, **ESP8266**)
+
+Note that targeting the Xtensa ISA currently requires the use of the [esp-rs/rust] compiler fork. The [esp-rs/rust-build] repository has pre-compiled release artifacts for most common platforms, and provides installation scripts to aid you in the process.
+
+RISC-V is officially supported by the official Rust compiler.
+
+[esp-rs/rust]: https://github.com/esp-rs/rust
+[esp-rs/rust-build]: https://github.com/esp-rs/rust-build
+
 ## Patching the SVDs
 
 [svdtools](https://github.com/stm32-rs/svdtools) is used to patch the SVDs rather than modifying the files directly. This makes it easier to upstream the changes to the official SVDs, which is done periodically. A full description of the patching format is available in the `svdtools` README.

esp32/Cargo.toml

@@ -6,7 +6,7 @@ authors = [
     "Arjan Mels <arjan@mels.email>",
 ]
 edition = "2021"
-rust-version = "1.58"
+rust-version = "1.60"
 repository = "https://github.com/esp-rs/esp-pacs"
 description = "Peripheral access crate for the ESP32"
 keywords = [

esp32s2/Cargo.toml

@@ -3,7 +3,7 @@ name = "esp32s2"
 version = "0.3.0"
 authors = ["Jesse Braham <jesse@beta7.io>"]
 edition = "2021"
-rust-version = "1.58"
+rust-version = "1.60"
 readme = "README.md"
 repository = "https://github.com/esp-rs/esp-pacs"
 description = "Peripheral access crate for the ESP32-S2"

esp32s3/Cargo.toml

@@ -3,7 +3,7 @@ name = "esp32s3"
 version = "0.3.0"
 authors = ["Jesse Braham <jesse@beta7.io>"]
 edition = "2021"
-rust-version = "1.58"
+rust-version = "1.60"
 readme = "README.md"
 repository = "https://github.com/esp-rs/esp-pacs"
 description = "Peripheral access crate for the ESP32-S3"