support esp-mbedtls for esp32c6

.cargo/config.toml

@@ -31,6 +31,17 @@ rustflags = [
   "-C", "force-frame-pointers",
 ]
 
+[target.riscv32imac-unknown-none-elf]
+runner = "espflash flash --monitor --baud 921600"
+
+rustflags = [
+  "-C", "link-arg=-Tlinkall.x",
+
+  # Required to obtain backtraces (e.g. when using the "esp-backtrace" crate.)
+  # NOTE: May negatively impact performance of produced code
+  "-C", "force-frame-pointers",
+]
+
 [target.xtensa-esp32s2-none-elf]
 runner = "espflash flash --monitor --baud 921600"
 
@@ -69,8 +80,10 @@ esp32 =   "run --release --features   esp32 --target xtensa-esp32-none-elf
 esp32s2 = "run --release --features esp32s2 --target xtensa-esp32s2-none-elf      --features esp-hal/default"
 esp32s3 = "run --release --features esp32s3 --target xtensa-esp32s3-none-elf      --features esp-hal/default"
 esp32c3 = "run --release --features esp32c3 --target riscv32imc-unknown-none-elf  --features esp-hal/default"
+esp32c6 = "run --release --features esp32c6 --target riscv32imac-unknown-none-elf  --features esp-hal/default"
 
 besp32 =   "build --release --features   esp32 --target xtensa-esp32-none-elf        --features esp-hal/default"
 besp32s2 = "build --release --features esp32s2 --target xtensa-esp32s2-none-elf      --features esp-hal/default"
 besp32s3 = "build --release --features esp32s3 --target xtensa-esp32s3-none-elf      --features esp-hal/default"
 besp32c3 = "build --release --features esp32c3 --target riscv32imc-unknown-none-elf  --features esp-hal/default"
+besp32c6 = "build --release --features esp32c6 --target riscv32imac-unknown-none-elf  --features esp-hal/default"

Cargo.toml

@@ -137,6 +137,14 @@ esp32c3 = [
     "esp-wifi?/esp32c3",
     "esp-mbedtls/esp32c3",
 ]
+esp32c6 = [
+    "esp-hal?/esp32c6",
+    "esp-hal-embassy?/esp32c6",
+    "esp-backtrace?/esp32c6",
+    "esp-println?/esp32c6",
+    "esp-wifi?/esp32c6",
+    "esp-mbedtls/esp32c6",
+]
 esp32s2 = [
     "esp-hal?/esp32s2",
     "esp-hal-embassy?/esp32s2",

README.md

@@ -26,6 +26,7 @@ Examples are available for:
 
 - esp32
 - esp32c3
+- esp32c6
 - esp32s2
 - esp32s3
 
@@ -53,6 +54,7 @@ Here's a table of the architectures with their corresponding target for quick re
 | ------------ | --------------------------- | ------------------ |
 | esp32        | xtensa-esp32-none-elf       | esp                |
 | esp32c3      | riscv32imc-unknown-none-elf | nightly            |
+| esp32c6      | riscv32imac-unknown-none-elf| nightly            |
 | esp32s2      | xtensa-esp32s2-none-elf     | esp                |
 | esp32s3      | xtensa-esp32s3-none-elf     | esp                |
 

esp-mbedtls-sys/Cargo.toml

@@ -33,5 +33,6 @@ default = []
 # ESP-HAL: Exactly *one* chip MUST be selected via its feature:
 esp32 = ["esp-wifi/esp32"]
 esp32c3 = ["esp-wifi/esp32c3"]
+esp32c6 = ["esp-wifi/esp32c6"]
 esp32s2 = ["esp-wifi/esp32s2"]
 esp32s3 = ["esp-wifi/esp32s3"]

esp-mbedtls-sys/build.rs

@@ -15,13 +15,14 @@ fn main() -> Result<()> {
     // and just use the pre-generated baremetal ESP bindings and libraries
     let esp32 = env::var("CARGO_FEATURE_ESP32").is_ok();
     let esp32c3 = env::var("CARGO_FEATURE_ESP32C3").is_ok();
+    let esp32c6 = env::var("CARGO_FEATURE_ESP32C6").is_ok();
     let esp32s2 = env::var("CARGO_FEATURE_ESP32S2").is_ok();
     let esp32s3 = env::var("CARGO_FEATURE_ESP32S3").is_ok();
 
     let host = env::var("HOST").unwrap();
     let target = env::var("TARGET").unwrap();
 
-    // If we're building for ESP32, ESP32C3, ESP32S2, or ESP32S3, we don't need to do anything
+    // If we're building for ESP32, ESP32C3, ESP32C6, ESP32S2, or ESP32S3, we don't need to do anything
     // Just link against the pre-built libraries and use the pre-generated bindings
     let bindings_dir = crate_root_path.join("src").join("include");
     let libs_dir = crate_root_path.join("libs");
@@ -36,6 +37,11 @@ fn main() -> Result<()> {
             bindings_dir.join("esp32c3.rs"),
             libs_dir.join("riscv32imc-unknown-none-elf"),
         ))
+    } else if esp32c6 {
+        Some((
+            bindings_dir.join("esp32c6.rs"),
+            libs_dir.join("riscv32imac-unknown-none-elf"),
+        ))
     } else if esp32s2 {
         Some((
             bindings_dir.join("esp32s2.rs"),