From cc163589fc7768f077f878f047e624d1ed46cd02 Mon Sep 17 00:00:00 2001
From: Joseph Ferano <joseph@ferano.io>
Date: Mon, 9 Jun 2025 18:06:58 +0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=93=9F=20pmme-device:=20Rust=20version=20?=
 =?UTF-8?q?with=20the=20esp-idf-template?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 pmme-device/rust-version/.cargo/config.toml  | 16 +++++++++++
 pmme-device/rust-version/.gitignore          |  4 +++
 pmme-device/rust-version/Cargo.toml          | 30 ++++++++++++++++++++
 pmme-device/rust-version/build.rs            |  3 ++
 pmme-device/rust-version/rust-toolchain.toml |  2 ++
 pmme-device/rust-version/sdkconfig.defaults  | 10 +++++++
 pmme-device/rust-version/src/main.rs         | 13 +++++++++
 7 files changed, 78 insertions(+)
 create mode 100644 pmme-device/rust-version/.cargo/config.toml
 create mode 100644 pmme-device/rust-version/.gitignore
 create mode 100644 pmme-device/rust-version/Cargo.toml
 create mode 100644 pmme-device/rust-version/build.rs
 create mode 100644 pmme-device/rust-version/rust-toolchain.toml
 create mode 100644 pmme-device/rust-version/sdkconfig.defaults
 create mode 100644 pmme-device/rust-version/src/main.rs

diff --git a/pmme-device/rust-version/.cargo/config.toml b/pmme-device/rust-version/.cargo/config.toml
new file mode 100644
index 0000000..f632639
--- /dev/null
+++ b/pmme-device/rust-version/.cargo/config.toml
@@ -0,0 +1,16 @@
+[build]
+target = "xtensa-esp32-espidf"
+
+[target.xtensa-esp32-espidf]
+linker = "ldproxy"
+runner = "espflash flash --monitor"
+rustflags = [ "--cfg",  "espidf_time64"]
+
+[unstable]
+build-std = ["std", "panic_abort"]
+
+[env]
+MCU="esp32"
+# Note: this variable is not used by the pio builder (`cargo build --features pio`)
+ESP_IDF_VERSION = "v5.2.3"
+
diff --git a/pmme-device/rust-version/.gitignore b/pmme-device/rust-version/.gitignore
new file mode 100644
index 0000000..73a638b
--- /dev/null
+++ b/pmme-device/rust-version/.gitignore
@@ -0,0 +1,4 @@
+/.vscode
+/.embuild
+/target
+/Cargo.lock
diff --git a/pmme-device/rust-version/Cargo.toml b/pmme-device/rust-version/Cargo.toml
new file mode 100644
index 0000000..39efb1c
--- /dev/null
+++ b/pmme-device/rust-version/Cargo.toml
@@ -0,0 +1,30 @@
+[package]
+name = "rust-version"
+version = "0.1.0"
+authors = ["Joseph Ferano <joseph@ferano.io>"]
+edition = "2021"
+resolver = "2"
+rust-version = "1.77"
+
+[[bin]]
+name = "rust-version"
+harness = false # do not use the built in cargo test harness -> resolve rust-analyzer errors
+
+[profile.release]
+opt-level = "s"
+
+[profile.dev]
+debug = true    # Symbols are nice and they don't increase the size on Flash
+opt-level = "z"
+
+[features]
+default = []
+
+experimental = ["esp-idf-svc/experimental"]
+
+[dependencies]
+log = "0.4"
+esp-idf-svc = { version = "0.51", features = ["critical-section", "embassy-time-driver", "embassy-sync"] }
+
+[build-dependencies]
+embuild = "0.33"
diff --git a/pmme-device/rust-version/build.rs b/pmme-device/rust-version/build.rs
new file mode 100644
index 0000000..112ec3f
--- /dev/null
+++ b/pmme-device/rust-version/build.rs
@@ -0,0 +1,3 @@
+fn main() {
+    embuild::espidf::sysenv::output();
+}
diff --git a/pmme-device/rust-version/rust-toolchain.toml b/pmme-device/rust-version/rust-toolchain.toml
new file mode 100644
index 0000000..a2f5ab5
--- /dev/null
+++ b/pmme-device/rust-version/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "esp"
diff --git a/pmme-device/rust-version/sdkconfig.defaults b/pmme-device/rust-version/sdkconfig.defaults
new file mode 100644
index 0000000..c25b89d
--- /dev/null
+++ b/pmme-device/rust-version/sdkconfig.defaults
@@ -0,0 +1,10 @@
+# Rust often needs a bit of an extra main task stack size compared to C (the default is 3K)
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8000
+
+# Use this to set FreeRTOS kernel tick frequency to 1000 Hz (100 Hz by default).
+# This allows to use 1 ms granularity for thread sleeps (10 ms by default).
+#CONFIG_FREERTOS_HZ=1000
+
+# Workaround for https://github.com/espressif/esp-idf/issues/7631
+#CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=n
+#CONFIG_MBEDTLS_CERTIFICATE_BUNDLE_DEFAULT_FULL=n
diff --git a/pmme-device/rust-version/src/main.rs b/pmme-device/rust-version/src/main.rs
new file mode 100644
index 0000000..43b4fbd
--- /dev/null
+++ b/pmme-device/rust-version/src/main.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // It is necessary to call this function once. Otherwise some patches to the runtime
+    // implemented by esp-idf-sys might not link properly. See https://github.com/esp-rs/esp-idf-template/issues/71
+    esp_idf_svc::sys::link_patches();
+
+    // Bind the log crate to the ESP Logging facilities
+    esp_idf_svc::log::EspLogger::initialize_default();
+
+    loop {
+        log::info!("Hello, world!");
+        std::thread::sleep(std::time::Duration::from_secs(1));
+    }
+}