Add SHA accelerator implementation (#257)

* Add untested basic SHA for esp-sX/cX chips

* Fix ptr type inconsistency for S2

* Add ESP32 impl & fix process_buffer latch issue

* Add debug example for SHA accelerator

* Clean up no-op buffer prints

* Test vector parity (on esp32s3)

* Checkpoint for converting to alignment helper

* Finish refactoring & additional parity tests on esp32s3

* Remove core_intrinsics requirement for now

* Fix case where (src.len() % 4) == 3

* Finish sha2 example with performance comparison (12-61x speedup)

* Refactor ESP32 to alignment helper & Clean up example

* Prevent out-of-bounds reads in ESP32 version

* Revert Cargo debug changes

* Remove cargo config.toml

* Clean up example

* Remove common/rust-toolchain & ignore in future

* Might as well use actual size_of const

* Remove SHA512/SHA384 for C2/C3

* Directly import nb::block! to remove unused import warning & fix c2 feature detect

* Remove stray newlines

* Fix esp32c2 having SHA256

* ESP32 also has SHA384

* Remove comments that don't have a purpose

* Clean up example & finish() handling

* Add examples & add ESP32 free()

* Update C2/C3 examples to show accurate algorithm used

* Fix busy check for ESP32

* Remove outdated TODO comment

* Update PAC for ESP3 and (actually) fix busy check

* Refactor ESP32 version to reduce search space

* Add debug printlns to sha example & clean up comments

* Fix ESP32 version, finally

Co-authored-by: ferris <[email protected]>
Co-authored-by: Jesse Braham <[email protected]>

esp-hal-common/.gitignore

@@ -0,0 +1 @@
+rust-toolchain.toml

esp-hal-common/Cargo.toml

@@ -50,11 +50,11 @@ ufmt-write = { version = "0.1.0", optional = true }
 # Each supported device MUST have its PAC included below along with a
 # corresponding feature. We rename the PAC packages because we cannot
 # have dependencies and features with the same names.
-esp32   = { version = "0.15.0", features = ["critical-section"], optional = true }
+esp32   = { version = "0.16.0", features = ["critical-section"], optional = true }
 esp32c2 = { version = "0.5.1",  features = ["critical-section"], optional = true }
 esp32c3 = { version = "0.8.1",  features = ["critical-section"], optional = true }
 esp32s2 = { version = "0.6.0",  features = ["critical-section"], optional = true }
-esp32s3 = { version = "0.8.0",  features = ["critical-section"], optional = true }
+esp32s3 = { version = "0.9.0",  features = ["critical-section"], optional = true }
 
 [features]
 esp32   = ["esp32/rt"  , "procmacros/xtensa", "xtensa-lx-rt/esp32",   "xtensa-lx/esp32",   "critical-section/restore-state-u32", "lock_api"]

esp-hal-common/src/lib.rs

@@ -48,6 +48,7 @@ pub use self::{
     timer::Timer,
 };
 
+pub mod sha;
 pub mod analog;
 pub mod clock;
 pub mod delay;