Add Hermas project

.github/workflows/package.yml

@@ -43,6 +43,7 @@ jobs:
           mkdir firmware
           cp build/src/kyma/Release/kyma.bin firmware
           cp build/src/hades/Release/hades.bin firmware
+          cp build/src/hermas/Release/hermas.bin firmware
           cp build/src/astra/Release/astra.bin firmware
 
       - name: Upload coverage artifacts

CMakeLists.txt

@@ -34,6 +34,7 @@ if(CMAKE_CROSSCOMPILING)
     add_subdirectory(src/astra)
     add_subdirectory(src/benchmark)
     add_subdirectory(src/hades)
+    add_subdirectory(src/hermas)
     add_subdirectory(src/kyma)
 endif()
 

src/hermas/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.23...3.27)
+project(hermas)
+
+add_baremetal_executable(${PROJECT_NAME} ${LINKER_SCRIPT})
+target_sources(${PROJECT_NAME} PRIVATE main.cpp)
+target_link_libraries(${PROJECT_NAME} PRIVATE daisy gritwave::eurorack)

src/hermas/README.md

@@ -0,0 +1,7 @@
+# Hermas
+
+## Features
+
+- Transient Shaper
+  - Output gain control signal
+  - Sum of attack & sustain, or one only via switch/button

src/hermas/main.cpp

@@ -0,0 +1,55 @@
+#include <grit/audio/stereo.hpp>
+#include <grit/math/remap.hpp>
+#include <grit/unit/decibel.hpp>
+
+#include <daisy_patch_sm.h>
+
+namespace hermas {
+
+constexpr auto blockSize  = 16U;
+constexpr auto sampleRate = 96'000.0F;
+
+auto patch = daisy::patch_sm::DaisyPatchSM{};
+
+auto audioCallback(
+    daisy::AudioHandle::InterleavingInputBuffer in,
+    daisy::AudioHandle::InterleavingOutputBuffer out,
+    size_t size
+) -> void
+{
+    patch.ProcessAllControls();
+
+    auto const input  = grit::StereoBlock<float const>{in, size};
+    auto const output = grit::StereoBlock<float>{out, size};
+
+    auto const gainLeftKnob  = patch.GetAdcValue(daisy::patch_sm::CV_1);
+    auto const gainRightKnob = patch.GetAdcValue(daisy::patch_sm::CV_2);
+
+    auto const gainLeft  = grit::fromDecibels(grit::remap(gainLeftKnob, -30.0F, 6.0F));
+    auto const gainRight = grit::fromDecibels(grit::remap(gainRightKnob, -30.0F, 6.0F));
+
+    for (size_t i = 0; i < size; ++i) {
+        auto const inLeft  = input(0, i);
+        auto const inRight = input(1, i);
+
+        auto const leftGained  = inLeft * gainLeft;
+        auto const rightGained = inRight * gainRight;
+
+        output(0, i) = leftGained + rightGained;
+        output(1, i) = leftGained + rightGained;
+    }
+}
+
+}  // namespace hermas
+
+auto main() -> int
+{
+    using namespace hermas;
+
+    patch.Init();
+    patch.SetAudioSampleRate(sampleRate);
+    patch.SetAudioBlockSize(blockSize);
+    patch.StartAudio(audioCallback);
+
+    while (true) {}
+}

src/hermas/signal_chain.mmd

@@ -0,0 +1,28 @@
+---
+title: Gritwave Hermás
+---
+flowchart LR
+    subgraph Transient[TransientShaper]
+        Attack
+        Sustain
+        Strength
+        Smooth
+        SelectOut[Select CV Output]
+    end
+
+    Knob1((Knob 1)) --> Attack
+    Knob2((Knob 2)) --> Sustain
+    Knob3((Knob 3)) --> Strength
+    Knob4((Knob 4)) --> Smooth
+
+    %% Button
+    Switch --> SelectOut
+
+    CV5(CV5) --> Attack
+    CV6(CV6) --> Sustain
+    CV7(CV7) --> Strength
+    CV8(CV8) --> Smooth
+
+    Input --> |Signal| Transient
+    Transient --> |Signal| Output
+    Transient --> |Transient Gain| CVOut(CV Out)