From fef78bfa5b099549fafe14e27ba7811d8654d057 Mon Sep 17 00:00:00 2001
From: Yann Locatelli <yann.locatelli2@gmail.com>
Date: Fri, 1 Mar 2024 16:57:41 +0100
Subject: [PATCH] :sparkles: (dac): Add CoreDAC spike

Co-Authored-By: Maxime Blanc <66126094+aermanio@users.noreply.github.com>
Co-Authored-By: SamHadjes <48731907+samhadjes@users.noreply.github.com>
---
 spikes/CMakeLists.txt        |  2 +
 spikes/lk_dac/CMakeLists.txt | 22 +++++++++++
 spikes/lk_dac/main.cpp       | 71 ++++++++++++++++++++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 spikes/lk_dac/CMakeLists.txt
 create mode 100644 spikes/lk_dac/main.cpp

diff --git a/spikes/CMakeLists.txt b/spikes/CMakeLists.txt
index cc3bd94479..23f862caa5 100644
--- a/spikes/CMakeLists.txt
+++ b/spikes/CMakeLists.txt
@@ -13,6 +13,7 @@ add_subdirectory(${SPIKES_DIR}/lk_command_kit)
 add_subdirectory(${SPIKES_DIR}/lk_config_kit)
 add_subdirectory(${SPIKES_DIR}/lk_coreled)
 add_subdirectory(${SPIKES_DIR}/lk_core_touch_sensor)
+add_subdirectory(${SPIKES_DIR}/lk_dac)
 add_subdirectory(${SPIKES_DIR}/lk_event_queue)
 add_subdirectory(${SPIKES_DIR}/lk_file_reception)
 add_subdirectory(${SPIKES_DIR}/lk_file_manager_kit)
@@ -57,6 +58,7 @@ add_dependencies(spikes_leka
 	spike_lk_command_kit
 	spike_lk_coreled
 	spike_lk_core_touch_sensor
+	spike_lk_dac
 	spike_lk_event_queue
 	spike_lk_file_reception
 	spike_lk_file_manager_kit
diff --git a/spikes/lk_dac/CMakeLists.txt b/spikes/lk_dac/CMakeLists.txt
new file mode 100644
index 0000000000..0de1b5fb64
--- /dev/null
+++ b/spikes/lk_dac/CMakeLists.txt
@@ -0,0 +1,22 @@
+# Leka - LekaOS
+# Copyright 2024 APF France handicap
+# SPDX-License-Identifier: Apache-2.0
+
+add_mbed_executable(spike_lk_dac)
+
+target_include_directories(spike_lk_dac
+	PRIVATE
+	.
+)
+
+target_sources(spike_lk_dac
+	PRIVATE
+	main.cpp
+)
+
+target_link_libraries(spike_lk_dac
+	CoreSTM32Hal
+	CoreDAC
+)
+
+target_link_custom_leka_targets(spike_lk_dac)
diff --git a/spikes/lk_dac/main.cpp b/spikes/lk_dac/main.cpp
new file mode 100644
index 0000000000..37221646f8
--- /dev/null
+++ b/spikes/lk_dac/main.cpp
@@ -0,0 +1,71 @@
+// Leka - LekaOS
+// Copyright 2024 APF France handicap
+// SPDX-License-Identifier: Apache-2.0
+
+#include <cmath>
+
+#include "rtos/ThisThread.h"
+
+#include "CoreDAC.h"
+#include "CoreSTM32Hal.h"
+#include "CoreSTM32HalBasicTimer.h"
+#include "DigitalOut.h"
+#include "LogKit.h"
+
+using namespace leka;
+using namespace std::chrono_literals;
+
+auto hal	   = CoreSTM32Hal {};
+auto hal_timer = CoreSTM32HalBasicTimer {hal};
+auto coredac   = CoreDAC {hal, hal_timer};
+
+auto audio_enable = mbed::DigitalOut {SOUND_ENABLE, 1};
+
+constexpr uint32_t sample_rate_hz = 44'100;
+
+void fillBufferWithSinWave(uint16_t *buffer, uint32_t samples_per_period, uint16_t maxValue, uint16_t minValue)
+{
+	auto resolution = 2.0 * M_PI / samples_per_period;
+
+	auto sin0_1		   = [](double value) { return (sin(value) + 1.0) / 2.0; };
+	auto normalization = [maxValue, minValue](double standard_value) {
+		return standard_value * (maxValue - minValue) + minValue;
+	};
+
+	for (uint32_t sample = 0; sample < samples_per_period; sample++) {
+		auto standard_value	  = sin0_1(sample * resolution);
+		auto normalized_value = normalization(standard_value);
+		buffer[sample]		  = static_cast<uint16_t>(normalized_value);
+	}
+}
+
+auto main() -> int
+{
+	logger::init();
+
+	log_info("Hello, World!\n\n");
+
+	hal_timer.initialize(500);
+	coredac.initialize();
+
+	const uint32_t frequency = 440;
+	const uint16_t maxVal	 = 0x100;
+	const uint16_t minVal	 = 0x000;
+	std::array<uint16_t, sample_rate_hz / frequency> buffer {};
+	fillBufferWithSinWave(buffer.data(), buffer.size(), maxVal, minVal);
+
+	coredac.registerDataToPlay(buffer);
+
+	log_info("buffer size: %d", buffer.size());
+	log_info("Start sound");
+	coredac.start();
+
+	rtos::ThisThread::sleep_for(1s);
+
+	log_info("Stop sound");
+	coredac.stop();
+
+	while (true) {
+		rtos::ThisThread::sleep_for(1min);
+	}
+}