Add functions for single-sided FFT and Power calculations

CMakeLists.txt

@@ -7,13 +7,18 @@
 cmake_minimum_required(VERSION 3.20.0)
 
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
 project(app_core)
 
 # NORDIC SDK APP START
 target_sources(app PRIVATE src/main.cpp)
 # NORDIC SDK APP END
 
+# COMPILER AND LINKER OPTIONS
+
+# Add project directories
 zephyr_library_include_directories(.)
+add_subdirectory(src)
 
 # Add CMSIS library from nrfSDK
 include_directories(..\\..\\..\\..\\modules\\hal\\cmsis\\CMSIS\\DSP\\Include)

nrf5340dk_nrf5340_cpuapp.overlay

@@ -0,0 +1,30 @@
+// To get started, press Ctrl+Space to bring up the completion menu and view the available nodes.
+
+// You can also use the buttons in the sidebar to perform actions on nodes.
+// Actions currently available include:
+
+// * Enabling / disabling the node
+// * Adding the bus to a bus
+// * Removing the node
+// * Connecting ADC channels
+
+// For more help, browse the DeviceTree documentation at https://docs.zephyrproject.org/latest/guides/dts/index.html
+// You can also visit the nRF DeviceTree extension documentation at https://nrfconnect.github.io/vscode-nrf-connect/devicetree/nrfdevicetree.html
+
+&spi0 {
+    max-frequency = <DT_FREQ_M(1)>;
+    easydma-maxcnt-bits = <16>;
+};
+
+&pwm0 {
+	status = "disabled";
+};
+
+&sw_pwm {
+	status = "okay";
+	channel-gpios = <&gpio0 4 PWM_POLARITY_INVERTED>;
+};
+
+&pwm_led0 {
+	pwms = <&sw_pwm 0 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
+};

prj.conf

@@ -6,17 +6,27 @@
 
 CONFIG_MULTITHREADING=y
 CONFIG_KERNEL_MEM_POOL=y
-CONFIG_NUM_PREEMPT_PRIORITIES=0
+CONFIG_NUM_PREEMPT_PRIORITIES=5
 CONFIG_SYS_CLOCK_EXISTS=y
+CONFIG_ZERO_LATENCY_IRQS=y
 CONFIG_ARM_MPU=y
+CONFIG_PWM=y
 CONFIG_I2C=n
 CONFIG_WATCHDOG=y
-CONFIG_GPIO=y
 CONFIG_SPI=y
+CONFIG_SPI_ASYNC=y
 CONFIG_SERIAL=y
 CONFIG_FLASH=n
-CONFIG_PM=n
-CONFIG_BOARD_ENABLE_CPUNET=y
+
+# Enable log settings
+CONFIG_LOG=y
+CONFIG_STDOUT_CONSOLE=n
+CONFIG_UART_CONSOLE=n
+# CONFIG_RTT=y
+CONFIG_USE_SEGGER_RTT=y
+CONFIG_LOG_BACKEND_RTT=y
+CONFIG_CBPRINTF_FP_A_SUPPORT=y
+# CONFIG_BOARD_ENABLE_CPUNET=y
 
 # Enable CMSIS to be used through nrfSDK
 CONFIG_FPU=y
@@ -25,14 +35,14 @@ CONFIG_CMSIS_DSP=y
 CONFIG_CMSIS_DSP_TRANSFORM=y
 CONFIG_CMSIS_DSP_BASICMATH=y
 CONFIG_CMSIS_DSP_COMPLEXMATH=y
-CONFIG_CMSIS_NN=y
 CONFIG_NEWLIB_LIBC_MIN_REQUIRED_HEAP_SIZE=2048
 
 # Enable hardware peripherals
 CONFIG_DMA=y
 CONFIG_CPP=y
 
 # Enable firmware settings
+CONFIG_USERSPACE=y
 CONFIG_DEBUG_THREAD_INFO=y
 CONFIG_DEBUG_OPTIMIZATIONS=y
 CONFIG_DYNAMIC_INTERRUPTS=n
@@ -42,8 +52,14 @@ CONFIG_THREAD_STACK_INFO=y
 CONFIG_THREAD_CUSTOM_DATA=n
 CONFIG_BOOT_BANNER=n
 CONFIG_BOOT_DELAY=0
-CONFIG_CONSOLE=y
-CONFIG_UART_CONSOLE=y
 CONFIG_STDOUT_CONSOLE=n
-CONFIG_PRINTK=y
-CONFIG_EARLY_CONSOLE=n
+CONFIG_EARLY_CONSOLE=n
+
+# Enable CPP specific flags
+# NOTE: some are deprecated but we need them to avoid linker errors
+CONFIG_CPLUSPLUS=y
+CONFIG_LIB_CPLUSPLUS=y
+CONFIG_NEWLIB_LIBC=y
+CONFIG_STD_CPP14=y
+
+CONFIG_NRFX_SPIM0=y

src/AnalogFrontEndWrapper.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "Data.h"
+
+class AnalogFrontEndWrapper {
+
+public:
+    virtual ~AnalogFrontEndWrapper() = default;
+    virtual void Initialize() = 0;
+    // virtual void Configure() = 0;
+    virtual void Start()=0;
+    virtual void Wakeup()=0;
+    virtual void Standby()=0;
+    virtual void Reset()=0;
+    virtual void Stop()=0;
+    virtual void ReadData()=0;
+};