Add rt feature to allow usage without runtime.

Cargo.toml

@@ -5,33 +5,36 @@ authors = ["Scott Mabin <[email protected]>", "Arjan Mels <[email protected]>"]
 edition = "2018"
 
 
-# Allow overriding of memcpy, memset, etc.
+# Allow overriding of `memcpy`, `memset`, etc.
 [package.metadata.cargo-xbuild]
 memcpy = false
 
 
 [features]
-default=["mem"]
+default = ["mem", "rt"]
 
-# Place program completely in ram (needed when e.g. using only ROM bootloader, or for debugging)
-all_in_ram=[]
+# Place program completely in RAM (needed when e.g. using only ROM bootloader, or for debugging).
+all_in_ram = []
 
-# Allow use of external ram. Needs customized bootloader.
-external_ram=["esp32-hal-proc-macros/external_ram"]
+# Allow use of external RAM. (Needs customized bootloader.)
+external_ram = ["esp32-hal-proc-macros/external_ram"]
 
-# Add support for Global Allocator
-alloc=["linked_list_allocator"]
+# Add support for global allocator.
+alloc = ["linked_list_allocator"]
 
-# Define memcpy, memset etc. as replacement of standard functions
-mem=[]
+# Define `memcpy`, `memset`, etc. as replacement of standard functions.
+mem = []
+
+# Enable the `rt` feature of the `esp32` crate.
+rt = ["esp32/rt", "xtensa-lx6-rt"]
 
 
 [dependencies]
 esp32-hal-proc-macros = { path = "procmacros" }
 
-xtensa-lx6-rt = "0.2.0"
+xtensa-lx6-rt = { version = "0.2.0", optional = true }
 xtensa-lx6 = "0.1.0"
-esp32 = "0.5.0"
+esp32 = { version = "0.5.0", default-features = false }
 bare-metal = "0.2"
 nb = "0.1.2"
 spin = "0.5.2"

src/lib.rs

@@ -33,6 +33,7 @@ pub mod efuse;
 #[cfg(feature = "external_ram")]
 pub mod external_ram;
 pub mod gpio;
+#[cfg(feature = "rt")]
 pub mod interrupt;
 pub mod prelude;
 pub mod serial;
@@ -54,6 +55,7 @@ pub mod mem;
 /// ENTRY point is defined in memory.x
 /// *Note: the pre_init function is called in the original reset handler
 /// after the initializations done in this function*
+#[cfg(feature = "rt")]
 #[doc(hidden)]
 #[no_mangle]
 pub unsafe extern "C" fn ESP32Reset() -> ! {

src/prelude.rs

@@ -6,8 +6,8 @@
 //!
 //! This can be imported as use `esp32_hal::prelude::*`.
 
-pub use xtensa_lx6_rt::entry;
-pub use xtensa_lx6_rt::exception;
+#[cfg(feature = "rt")]
+pub use xtensa_lx6_rt::{entry, exception};
 
 pub use crate::analog::SensExt;
 pub use crate::gpio::GpioExt;

src/timer/mod.rs

@@ -170,7 +170,7 @@ macro_rules! timer {
                     Event::TimeOutEdge => self.enable_edge_interrupt(true),
                 };
                 unsafe {
-                    interrupt::free(|_| {
+                    xtensa_lx6::interrupt::free(|_| {
                         TIMER_MUTEX.lock();
                         (*(self.timg))
                             .int_ena_timers

src/timer/watchdog.rs

@@ -182,7 +182,7 @@ impl<TIMG: TimerGroup> Watchdog<TIMG> {
             timg.wdtconfig4.write(|w| unsafe { w.bits(per3) });
             timg.wdtconfig5.write(|w| unsafe { w.bits(per4) });
 
-            interrupt::free(|_| {
+            xtensa_lx6::interrupt::free(|_| {
                 super::TIMER_MUTEX.lock();
                 timg.int_ena_timers.modify(|_, w| w.wdt_int_ena().set_bit());
             });